Knowing Strumu in Lancius. Rozrahunok elektrichnykh kіl stіyny strumu a way of equivalent transformation. How to get out a steady strum

Fundamentals > Maintenance and repair > Post-installation electric jet

Methods of rozrahunka lanzyugiv fast strumu

Lanzug is folded over hіlok, maє vuzlіv ta strumu dzherel. We have given the formulas for the adjuncts for the rozrahunka of the lancers, to avenge the tension and the struma. The stench is fair and for quiet okremikh vipadkіv: if in lanceuzi є only a little dzherela naprugi or only dzherela strum.

Zastosuvannya laws of Kirchhoff.Sound at the lances in the house all the EPC dzherela and the strum dzherela and all the supports. At this moment, the number of unknown strums is restored, which are healthy. For skin gels, a positive direct struma is given.
Number In mutually independent equals, which are formed according to the first law of Kirchhoff, there are more number of knots without a single one. The number of mutually independent equals that add up for another Kirchhoff law,

When folding equals, according to another Kirchhoff law, one should choose independent contours, so as not to avenge the strum. The number of equals, which are added up for the first and other Kirchhoff's law, is greater than the number nevіdomih strumіv.
Apply it at the heads of the division.

Method of contour strums (Maxwell).This method allows you to change the number of equalities of the system to a number, which is determined by the formula (0.1.10). It is based on the fact that the strum of a lancet can be seen from an algebraic sum of contour streaks that flow through this galuzi. When koristuvanny tsim method is chosen to designate contour strums (if any, it is to blame for passing even one vibration of contour strums). From the theory it is clear that the number of contour strums is significant. It is recommended to choosecontour streaks so that the skin passes through one of themand stinks ring out є tasked by the minds of the head), and those that have been lostcontour streaks to choose to pass along the needles, like to avenge the strum. To determine the rest of the contour lines after another Kirchhoff's law for these contours, they are added to equal to this look:

de - vlasny opіr contour n (the sum of the supports of all the columns to enter the contour n); - hot opir contours n і l, moreover , as a direct contour jet at the bed for contour lines n і l run away, then positively , in a different light negative; - algebraic sum of EPCs, included at the needle, which make up the contour n; - hot support for the contour n with a contour, what to take revenge on the strum.
Apply it at the heads of the division.

Nodular stress method.This method allows you to change the number of nodes in the system to the number Y, which is the number of nodes without one

The essence of the method is that the first solution to the system equals (0.1.13) determines the potentials of all the nodes of the scheme, and the strumi of the trees, which connect the nodes, know the help of Ohm's law.
When folding equals by the method of nodal stresses, the back of the head is taken into account equal to zero potential of any node (it is called the basic node). For the purpose of identifying potentials, decide vuzlіv folded advancing system rivnyan:

Here - the sum of the conductors of the wires, coming to the node s;- the sum of the conductivities of the joints, which directly connect the node s with the node q; - algebraic sum of creations of EPCs that adjoin to the node s , on their conductivity; with the sign “+”, tі EPC are taken, if it is directly at the node s, and with the sign “-” - at the direct point of the node s;- the sum of the algebra of strums dzherel strum, coming to the node s; with cimu zі sign "+" are taken і strumi, yakі directing to the node s , and zі with the sign "-" - y straight ahead from node s.
Using the knotted stress method, it is recommended to fold in quiet falls, if the amount of rivnyan is less than the amount of rivnyan, folded for the contour strum method.
If in the diagram the knots are connected by ideal EPC strings, then

de - The number of girls that only the ideal dzherel EPC can achieve.
Apply it at the heads of the division.
Chastkovy vipadok-two-nodal scheme. For schemes where there are two knots (for the assignment of knots a i b ), wuzova stress

de - algebraic sum of EPC creations (EPS are considered positive, as stinks are straightened to node a, and negative, as they are from node b ) on the conductivity of these fibers;- strum dzherel strum (positive, as the stench is straightened to node a, the other is negative, as it is straightened from the node a to the node b); - sum conductivities of all wires, which connect nodes a i b.

Overlay principle.As an electric lance with set values \u200b\u200bEPC dzherel strum dzherel strum, then the rozrahunok strum is based on the principle of imposing on the offensive. The strum at the be-yakіy gіlka can be developed like a sum of algebra of strums, which are called in the EPC of the dermal neck of the EPC okremo and strum, to pass through the same nіy nіy in the same way of the dermal strum. If you need a mother on the uvazi, if there is a rise in the growth of strums, calling for some kind of EPC or strum, other EPCs in the circuit are replaced by short-circuited streels, and the strums with the strums of the other strums are switched on (the strums with the strums are switched on).

Equivalent transformation of schemes.In all changes of transformation, replace some schemes with others, equivalent to them, it is not guilty to bring the streams to change, or the pressure on the lanes of the lansyug, which did not recognize the transformation.
Replacing the consecutively installed supports with one equivalent. Support the days in sequence, as if the stench is wrapped around by one and the same strum (for example, supportsuccessively (div. fig. 0.1,3), also successively supports).
n sequentially built supports, more sums of these supports

At the last closing n having supported the voltages on them, they are directly proportional to the supports

In an okremu vpadku two successively zadnah supports

de u - high voltage, which is on the distance of the lansy, which is to avenge two supports(Div. Fig. 0.1.3).
Replacing the parallel z'ednah supports with one equivalent. Support for the day in parallel, as if the stink of the vaga came to one bet vuzlev, for example, a support(Div. Fig. 0.1.3).
Equivalent opir of the lancer, which is formed from n parallel to the connected supports (Fig. 0.1.4),

In an okremu vpadku parallel z'єdnannya two supportsequivalent opir

With parallel connection n supports (Fig. 0.1.4, a) the streams in them are distributed in proportion to their supports or in direct proportion to their conductivities

Strum in the skin they are counted through the strum I at the unbroken part of the lanceug

There are two parallel needles in the okremy vpad (Fig. 0.1.4, b)

Replacing a broken foundation with one equivalent one. Zmіshane z'єdnanny tse podednannya poslіdovny i parallel connection support For example, support (Fig. 0.1.4, b) Your equivalent opir

The formulas for converting the tricot of the supports (Fig. 0.1.5, a) to the equivalent star of the supports (Fig. 0.1.5, b), and in turn, may look like this:

Equivalent dzherel method(Methol is an active bipolar, or the idle method is a short flicker). Zastosuvannya method dotsіlno vyznachennya strum in whether it's one of the rods of a folding electric lance. We consider two options: a) EPC equivalent gerel method and b) Strumu equivalent gerel method.
With the method of equivalent dzherel EPCfor the meaning of strumu I enough nail ab, opir like R (Fig. 0.1.6, a, the letter A means an active two-terminal network), you need to open the plug (Fig. 0.1.6,b), and part of the lansyug, connected to the neck, replace it with an equivalent dzherel with EPCthat internal support(Fig. 0.1.6, c).
EPCof which dzherel is more stressful on the clamps of the open-ended plug (idling voltage):

Razrahunok circuits in the idle mode (div. Fig. 0.1.6, b) for designation be carried out by any vidomim method.
Internal opiran equivalent EPC dzherel is complementary to the inlet support of the passive lanyard, which is tightly clamped and that b the output circuit, so that all the dzherels are switched off [the EPC dzherel is replaced by short-circuited slats, and the jacks with strum dzherels are switched on (Fig. 0.1.6); letter П indicating the passive nature of the lansyug], with a broken neck ab. Opir can be assigned directly to the scheme of fig. 0.1.6 p.
Strum at this gallery of the scheme (Fig. 0.1.6, e), which can be opir R, is determined by Ohm's law:

The solution to be-yakoy zavdannya z rozrahunku elektrichnogo lanceug should start with the choice of the method, which will be zroblenі calculus. As a rule, one and the same task can be solved by dekilkom methods. The result will be the same in any case, and the complexity of the calculation can be substantiated. For a correct selection of the method of rozrahunka, the next step is to be assigned to what class the whole electric lance should be: to simple electric lances or to folding ones.

Before forgive to carry electric lances, as if to avenge one or another electric power, or else to be in the same gallery of an electric lance. Below are two diagrams of simple electrical circuits. The first scheme to take revenge on one dzherel naprugi, in such a time, the electric lancet is unequivocally brought up to simple lancets. To avenge a friend already two dzherel, but the stench is known in one gіlki, also a simple electric lansyug.

Rozrahunok simple electric lances vibrate in such a sequence:

The technique of zastosovna to a rozrahunka of any simple electric lances is described; Other rozrahunki by a similar method can appear to be done with volumes and trials. Therefore, if the solution is known, we will not ask to carry out a re-verification of the correctness of manual rozrahunkiv іz zastosuvannya spetsialіzovanyh programs or fold the balance of tensions. The rise of a simple electric lancet at the same time, the balance of tensions was induced in butt No. 6.

Folding electric lances

Before foldable electric Lanziugs to bring lances, which to avenge the sprat of the dzherel of electric energy, which are included in the price of the bells. Lower on the little one is depicted the butts of such kіl.

For folding electric lances, the method of rozrahunka of simple electric coils does not stop. Forgiveness of schemes is impossible, because it is not possible to see on the diagram a lancer's board with successive or parallel chains of the same type of elements. In some cases, the transformation of the scheme with a distant rozrachunk is still possible, but only more vinyatka іz zagalnogo rule.

For a complete re-roofing of folding electric lances, use the following methods:

Zastosuvannya laws of Kirchhoff (universal method, collapsible design of the system of linear alignments).
Contour strum method (universal method, trochitis simpler lower at item 1)
Nodular stress method (universal method, trochitis simpler lower at item 1)
The principle of overlay (universal method, inconsistent openings)
Equivalent dzherel method (handy, if it is necessary to work not a new electric lance, but to know the stream in one of the bells).
The method of equivalent transformation of the scheme (it is rarely necessary to do it, just rozrahunki).

Peculiarities of stosuvannya dermal method of rozrahunka foldable electric lances in the report of the study in viable infants.

With a constant strum, there are particles that are shifted into the song directly, from the charge. In a different way, the strum can be called such quantities as a voltage, as a constant and in a straight line, and behind the values.

Let's take a look at this characteristic, the installation of the electric lances of the post-strum. Vіdpovіmo for food, how to carry out the maintenance of an electric lance, how it will be paid for and on deakі іnshі.

Vіd plus to minus chi navpaki?

At the dzherel, the electronics are shifted in the form of a minus plus value. Regardless of those who know everything about it, it is customary to take it straight from plus to minus. Why? We explain what happened so historically. Ale chi tse so true? Age tsya "history" was formed in an insignificant interval of an hour.

The post-stream stream has the main laws of electrical engineering: Ohm's law and Kirchhoff's laws. Strum used to be called galvanic, because yoga was taken away as a result of galvanic reaction. If they started to see them off to the booths, they kept talking about those, what kind of strum to introduce: a constant change. “Vіynu” having won another one, the shards of vin turned out to be less costly. It’s easier to convey it on the big screens of light transformations.

How to get out a steady strum

Ale and not known from vikoristanny post_yny strum. postіyny strumu zustrіchayutsya, for example, in batteries.

The jet vibrates behind the help of electromagnetic induction, after which it is driven by a collector. Such a reaction is vibrated by the generator, so is the constant stream vibrating. The electric lances of a permanent struma can be transformed from a changeable one into a rahunok, turning into a straight one.

Stagnation area

Zastosuvannya tsgogo dosit widely. Most of the appli- cations have a booth, for example, in a computer modem, a charger for a mobile phone, an electric kettle or a food processor, the most powerful strum. The electric lances of the steady struma vibrate and transform into car generator that be-yakoy portable device. In the new city, industrial motors should function, and in other countries, high-voltage electric transmission lines should be installed. Navit with some medical devices of wines zastosovuєtsya.

A permanent strum is safe, but a fatal result can occur when struck with a strum at 300 mA, and with a change - even at 50-100 mA.

Electric lanceug

The sound is secured with usima outbuildings, the zavdyaki is how the transmission is being made, it has rozpodil that transformation of thermal, electromagnetic, light and other types of energy information. Processes are described in such a way as to strum that voltage.

The main elements of the electric coils of the post-strumu

Main elements - tse priymachi that dzherela energoinformatsiy, scho zadnuyutsya conductors. At the dzherelakh see different energy is converted into electricity. On priymachah, navpaki, electricity is transformed into another way.

Lantsyugs, de transformation, transmission of that otrimannya of electrical energy, which is carried out at a constant value of the voltage and struma for a tense hour, are called lancets of a constant stream. There, de process is seen from the changing meanings - the lancets of the changing struma.

Sobity rozrahunok that doslіdzhennya electric lansyug postiyny strumu ( Laboratory robot for these purposes, call to serve), a replacement scheme is established, so that it is ideal for a real-life rozrahunka. Sob її otrimati, it is necessary to replace all the elements of the scheme. Physical processes may be affected by skin mathematical description.

resistive elements

The resistor is one of the prime movers of the electric lance. Yogo characterizes the active opir, which is vibrated in ohms. Resistive supports or, as they are called, are actively introduced into substitution circuits, in order to protect electromagnetic energy, which is transformed, in another way.

Rozrahunok foldable electric lansyugіv stіyny strumu to be carried out, yakscho set a positive direction of all strumіv and voltage. Select directly їх knots, what can great potential to a node with a lower potential.

With an independent support of the struma, the resistor is called linear, and the electric lance is called linear resistive. The current-voltage characteristic is expressed through a linear function that passes through the cob of coordinates.

In the analysis of such lancets, the principle of simplification is often used, which means that the replacement of folding electric lancets is simple. Ale strum that voltage is not guilty. Then the lancer will burn up to the simplest look. Z'ednani resistive elements can be but in parallel and consequently transformed.

After that parallel meeting

In the last sequence, all the elements of the strum may have the same meaning. Here the voltage is calculated for the help of the sum of all the included supports, multiplied by I, tobto:

U = (R1 + R2 + RN) I = RI.

With parallel closing, there is a constant pressure, then the strum is the sum of the strums on the skin elements. That yoga can be shown as a voltage boost for equivalent conductivity active elements. And there, at your side, the sum of the conductivity of the elements. The axis from which the post_yny strum is formed.

Electric lansyugs of the post-strum, krіm tsgogo, revenge the dzherela of the strain and the struma.

Dzherela

Independent voltage (EPC, strum) in support zvnіshny lanceug call yoga dzherel. Dzherelo EPC (voltage) dies at idle, then, de strum, the dzherela reaches zero. In substitution circuits, the resistor is protected from heat and energy consumption, which can be seen from the dzherel. Yakshcho wine is close to zero, but the strumu is insecurities, the price is ideal. Real zavzhdi maє kіtsveve znachennya.

The usual characteristics are as follows: in the case of the EPC stems, the stress sags in the struma, which flows through, and in the case of the jerel, the struma shows the tension on the clamps.

The real dzherela may be linear and non-linear delyanki. Let's take a look at the ways of rozrahunka of the linear electric coils of the post-strum. The stench is described in Ohm's law for new lanceug de I=E/(Rh+Rbh). Then U = E-RbhI. From these formulas, the internal support and internal conductivity are shown:

Rbh=∆U/∆I;
Gbh=∆I/∆U.

Rozrahunok non-linear electric lances of a post-strumu to be carried out on the basis of Kirchhoff's law. Methods of analysis for linear and non-linear schemes of difference. Therefore, the rest at the borders of the states are not looked at.

Fittings for the winding of a linear plot

Lantsyugs of the fast strum to avenge the dzherel. And with the accessories that they vimiryuyut, є: a voltmeter for vimiryuvannya naprugi on the distance of the lancet and an ammeter for the sequential inclusion to the lancet. At zero value, that conductivity is ideal.

Ways of inclusion become more sensible when looking at them from stagnant vimiryuvannya support. According to Ohm's law R = U/I.

We know that in reality there is no zero value. Therefore, there are only two options for their inclusion:

the internal opir of the voltmeter is much larger than the ammeter, so that the decrease in voltage on the new one does not shorten the decrease on the vimiryuvanom support, but the voltage, as it is mitigated by the voltmeter, is due to the operating range;
the internal opir of the voltmeter can be compared with the counter, and the ammeter - significantly less than the counter.

Experiment and task for the control robot

For vimiryuvannya voltage and struma zastosovuyutsya vіdpovіdnі generators. The internal opir of the stink is overcome by additional switches.

Voltmeter and ammeter enter to block AB1.

For vimiryuvannya support vikoristovuyutsya special schemes. In the case of the electric shock force, the internal opir may be vimknenim.

At the recommended manager, like a mother robot control, electric lances of the post-strumu are twisted behind the additional designation of the parameters of the electric motor dzherel, strum dzherel, vimiryuvannya support, turning on the parallel and serial supports, VAC.

Methods of rozrahunka lanceug_v post_y strum

The lancet is folded into streaks, maє vuzlіv and dzherel struma. We have given the formulas for the adjuncts for the rozrahunka of the lancers, to avenge the tension and the struma. The stench is fair and for quiet okremikh vipadkіv: if in lanceuzi є only a little dzherela naprugi or only dzherela strum. Zastosuvannya laws of Kirchhoff. Sound at the lances in the house all the EPC dzherela and the strum dzherela and all the supports. At this point, a number of non-domic strums are restored, which are healthy. For skin gels, a positive direct struma is given.
Number In mutually independent equals, which are formed according to the first law of Kirchhoff, there are more number of knots without a single one. The number of mutually independent equalities, which are added up for another Kirchhoff law, When folding up the equalities for another Kirchhoff law, the next is to choose independent contours, so as not to avenge the dzherel strum. The number of equalities, which are added up for the first and other Kirchhoff's law, is more significant than the number of new strums.
Apply it at the heads of the division. The method of contour strums (Maxwell). This method allows you to change the number of equalities of the system to a number, which is determined by the formula (0.1.10). It is based on the fact that the strum of a lansy can be seen from an algebraic sum of contour streaks that flow through this galuzi. When koristuvanny tsim method, choose that designate contour strums (if any, it’s to blame for passing if only one vibration of the contour strum). From the theory it seems that the number of contour strums is significant. It is recommended to choose contour strums in such a way that the skin of them passes through one struma (the contour strums can be combined with the double strums of the strum and the stench sounds like a given task), and the contour strums take revenge on the strum. To determine the rest of the contour lines after another Kirchhoff's law for these contours, they are added to equal to this look:

de - vlasny opіr contour n (the sum of the supports of all the columns that enter to the contour n); - galny opir contours n і l, moreover, as if directly contour strums at the sleeping needles for contours n і l are either positive or negative; - the algebraic sum of EPC, included at the needle, which make up the contour n; - galny opіr gіlki contour n z contour, to avenge the strum.
Apply it in the tasks of the division. The method of node voltages. The essence of the method lies in the fact that the first solution to the system equals (0.1.13) determines the potential of all the nodes of the scheme, and the strumi of the mountains, which the nodes are connected to, know for the help of Ohm's law.
When folding equals by the method of nodal stresses, the back of the head is taken into account equal to zero potential of any node (it is called the basic node). For the purpose of identifying the potentials of the universities, which are no longer available, an advancing system of equalization is being formed:
Here - the sum of the wires' capacities, coming to the node s; - the sum of the wires' conductances, which directly connect the node s with the node q; - algebraic sum of creations of EPCs, which adjoin to the node s, on their wires; with the sign “+”, tі EPC are taken, if it is directly at the node s, and with the sign “-” - at the direct point of the node s; - the sum of the algebra of strums dzherel strum, coming to the node s; with zіmu zі the sign "+" is taken tі strumi, yakі directing to node s, and zі sign "-" - straight from node s.
Using the knotted stress method, it is recommended to fold in quiet falls, if the amount of rivnyan is less than the amount of rivnyan, folded for the contour strum method.
If in the diagram the knots are connected by ideal EPC necks, then U equals, which are formed by the knot stress method, change: de - the number of legs, which can only be achieved by ideal EPC necks.
Apply it at the heads of the division.
Chastkovy vipadok-two-nodal scheme. For circuits where there are two nodes (for the designation of nodes a and b), the node voltage de - algebraic sum of creations of EPCs (ERCs are considered positive, as the stinks are straightened to node a, that is negative, as they are from node a to node b) on the conductivity of these fibers; - strum dzherel strum (positive, as the stench is straightened to node a and negative, as it is straightened from node a to node b); - the sum of the conductivities of all the joints that connect nodes a and b.

Overlay principle. As an electric lance with set values \u200b\u200bEPC dzherel strum dzherel strum, then the rozrahunok strum is based on the principle of superimposing on the offensive. The strum at the be-yakіy gіlka can be developed like a sum of algebra of strums, which are called in the EPC of the dermal neck of the EPC okremo and strum, to pass through the same nіy nіy in the same way of the dermal strum. If you need a mother on the uvazi, if there are strums rozrahunki, calling like one EPC or strumu, then the other EPC stalks in the scheme are replaced by short-circuited bays, and the bells with the strum gerels of the other strums are turned on (the bells with the strum stalks are switched off). transformation of schemes. In all changes of transformation, replace some schemes with others, equivalent to them, it is not guilty to bring the streams to change, or the pressure on the lanes of the lansyug, which did not recognize the transformation.
Replacing the consecutively installed supports with one equivalent. Supports the days in sequence, as if the stench is wrapped around by one and the same strum (for example, the supports of the days in sequence (div. Fig. 0.1,3), also the successive supports).
Equivalent opir of a lansyug, which is added up from n successively connected supports, adds up to the sum of these supports. In the case of a subsequent installation of n supports, the voltages on them are distributed in direct proportion to these supports. div. fig.0.1.3).
Replacing the parallel z'ednah supports with one equivalent. Support for the day in parallel, as if the stink of the vaga came to one bet vuzlev, for example, a support (Div. Fig. 0.1.3).
Equivalent support of the lansyug, which is formed from n parallel supports (Fig. 0.1.4),

At a parallel slope of a parallel bearing of two supports, equivalent supports When n bearings are connected in parallel (Fig. 0.1.4, a), the streams in them are divided in proportion to their supports, or in direct proportion to their conductivities. There are two parallel needles in the okremy vpad (Fig. 0.1.4, b) Replacing a broken foundation with one equivalent one. Zmіshane z'єdnanny tse poddnannya poslіdovnogo and parallel z'єdnanny poles. For example, supports (Fig. 0.1.4 b) are smashed. Їх equivalent opіr

de G - the conductivity of the wire.
Formulas (0.1.22) can be written using opіr

Equivalent dzherel method (method of an active two-terminal network, or the idling method and short zamikannya). Zastosuvannya method dotsіlno vyznachennya strum in whether it's one of the rods of a folding electric lance. We consider two options: a) EPC equivalent gerel method and b) Strumu equivalent gerel method.
With the method of the EPC equivalent dzherel for the recognition of the struma I of the full length ab, opir is R (Fig. 0.1.6, a, the letter A means an active bipolar), it is necessary to open the strum (Fig. 0.1.6, b), and part of the lance, connected to the neck, replaced with an equivalent neck with EPC and an internal support (Fig. 0.1.6, c).
EPC of the same dzherel is more stressful on the clamps of the open-circuited wire (idle voltage): Investigation of circuits in the idling mode (div. Fig. 0.1.6 b) for designation should be carried out by any other method.
The internal support of the EPC equivalent gerel is complementary to the inlet support of the passive lanyard, which is tightly clamped and that of the outward circuit, so that all the gerels are turned off [the EPC gerel is replaced by short-circuited poles, and the jacks are replaced by short-circuited poles, and the jacks are replaced by short-circuited struts; letter П indicating the passive nature of the lansyug], with a broken neck ab. Opir can be assigned directly to the scheme of fig. 0.1.6 p.
Strum at this gallery of the scheme (Fig. 0.1.6, e), which may opir R, is governed by Ohm's law.

It is customary for electrical engineering that a simple lancet is a tsel lanzyug, which can be wound up to a lancet with one dzherel and one equivalent support. You can burn the lancet for the help of equivalent transformations of the subsequent, parallel that zmishanogo z'ednan. The lansyugs serve as a vinnyatka, to avenge the folded z'ednannya with a star and a tricot. Rozrahunok lansyugіv postіyny strumu carried out in support of Ohm's law and Kirchhoff's.

butt 1

Two resistors connected to a 50 V constant voltage socket, with an internal support r = 0.5 ohm. Opir resistors R1= 20 and R2= 32 ohm. Vznachiti strum at Lanzyug and voltage on resistors.

Oskіlki resistors are connected in series, the equivalent opіr is more expensive than their sum. Knowing yoga, speeding up by Ohm's law for a complete lancer, to know the strum of a lancer.

Now knowing the strum at the lance, you can determine the voltage drop on the skin resistors.

You can change the correctness of the solution in many ways. For example, for the help of Kirchhoff's law, to prove that the sum of the EPC at the contour is equal to the sum of the voltage at the new one.

Ale, for the help of Kirchhoff's law, hand over the simple lancers to draw one circuit. More manually perevirki є balance of tightness.

Lantsyug is to blame for the balance of tensions, so that the energy given by the necks is to be replenished with the energy taken by the tricks.

The tension of the dzherel is recognized as an increase in the EPC on the strum, and the tension is taken off as an increase in the voltage drop on the strum.

Perevaga reverification by the balance of tightness in those who do not need to fold foldable bulky clothes on the basis of the laws of Kirchhoff, it is enough to know EPC, tension and strumi in lances.

butt 2

Hot strum of a lansyug, to avenge two resistors connected in parallel R 1 = 70 Ohm ta R 2 = 90 ohm, 500 mA max. Designate strums at the skin with resistors.

Two consecutively connected resistors are nothing else, like a dilnik strum. It is possible to determine the stream that a resistor is passing through the skin using an additional formula for a dilnik, with which voltage in the lance, we do not need to know, it is only necessary to use a hot stream and a resistor support.

Strumi in resistors

AT to this particular type hand over the task for the help of the first law of Kirchhoff;

If you don't remember the formula of the strum dilnik, you can change the task in another way. For which it is necessary to know the voltage in the lance, as it will be sleepy for both resistors, the oscillators are parallel. In order to know yoga, it is necessary to unravel the opir of the lancer

And then the voltage

Knowing the voltages, we know the streams that flow through the resistors

Yak bachite, strums wijshli themselves.

butt 3

In the electric lance, shown in the diagram R 1 = 50 ohm, R 2 = 180 ohm, R 3 = 220 ohms. Know the tension that is seen on the resistor R 1, strum through the resistor R 2, voltage across resistors R 3 It is clear that the voltage on the lancet clamps is 100 V.

In order to loosen the tension of the constant strum, which is seen on the resistor R 1, it is necessary to designate the strum I 1, which is a big one for the whole lance. Knowing the tension on the clamps and the equivalent support of the lance, you can know it.

Equivalent Opir and Strum in Lanciug

Sounds of tightness, which is seen on R 1