RU2684486C1 - Generator of multiphase system of emf using a block of diodes for cutting twice number of power switches - Google Patents

Abstract

FIELD: electrical equipment.SUBSTANCE: invention relates to the field of electrical equipment, and is intended to generate the voltages multiphase system with a given frequency and a specified number of phases based on the use of pulsed equipment. Device can be used both in stationary and mobile systems, including robotics, for supply of multiphase AC motors, as well as for supply of other multiphase consumers of electric energy with different from standard power frequency. Use of diodes in the device circuit makes it possible to reduce more than twice the number of power switches used for switching in comparison with the previously proposed device. This allows reducing dimensions and weight of the device, improving its power characteristics due to reduction of losses in power switches, and improving reliability of the device. Device includes control unit, providing cyclic, with given period of T alternate supply of control pulses with duration TI=T/n, which control opening of electronic power switches located in switching unit, block of diodes, containing modules D1, D2, … Dm, which makes it possible to reduce in two (and more) times the number of power switches, switching unit, which provides connection by means of power switches to output terminals of switching unit of voltage sources generated by power supply unit, and a power supply unit including a set of constant voltage sources of a given value. Each voltage source in the sequence specified by the control unit is connected for a time interval by TI tongs located in the switching unit to the output terminals of the switching unit.EFFECT: wider range of tools for the same purpose.1 cl, 6 dwg

Description

I. The technical field to which the invention relates.

The invention relates to the field of electrical engineering. The device is designed to generate a multiphase system of voltages of the required frequency, voltage value and number of phases when using a block of diodes to halve the number of power switches.

The device can be used both in stationary and mobile systems (robotics) to power multiphase AC motors, as well as to power other multiphase consumers of electric energy, including those with a different frequency than the standard power supply. The use of a block of diodes in the device circuit allows you to reduce by two (or more) times the number of power switches used for switching, compared with the previously proposed device [1]. This allows you to reduce the size and weight of the device, increases its energy characteristics by reducing losses in power switches, increases the reliability of the device. These characteristics are important for mobile devices, where dimensions and weight are essential.

II. State of the art

The aim of the invention is to develop a device for generating a multiphase system of voltages of the required frequency, voltage value and number of phases based on the use of pulse technology, which differs from the previously proposed device using a block of diodes to reduce by two (or more) times the number of power switches in the switching unit.

Symmetry properties of a sinusoidal function

The sinusoidal function has the following symmetry properties:

2. e (t) = e (T-t) T / 2 <t <T,

3. e (t) = - e (t + T / 2) for 0 <t <T / 2.

The symmetry properties are also valid for the approximating function of FIG. 1 represented by a sequence of impulse functions.

These properties allow for the approximation of a sinusoidal function to use a limited number of discrete values of the impulse functions. In the figure of FIG. Figure 1 shows the approximation of a direct sequence of sinusoidal voltage functions of a symmetric three-phase EMF system by a sequence of impulse functions with the number of time intervals n = 12.

FIG. 1 Approximation of a direct sequence of sinusoidal voltage functions of a symmetric three-phase EMF system by a sequence of impulse functions.

Table 1 contains the amplitude values of the impulse functions approximating the sinusoidal functions of the phase voltage of the three-phase system with the number of time intervals equal to 12.

Distinctive properties of the proposed device

The proposed device for generating a multiphase voltage system differs from that described in [1] in that:

- to reduce the number of power switches by two (or more) times in the switching unit, the symmetry property of the sinusoidal function is used. The positive and negative half-waves of the sine wave are symmetrical, and each of the half-waves is symmetrical about the vertical axis, which is behaved through the extreme value of the function;

- the approximating sinusoid function, consisting of a sequence of impulse functions, also possesses the indicated symmetry property. We take the number of impulse functions on the period of the sinusoidal function T equal to n, and the number of phases of the generator m. Then the number of power switches needed for switching these impulse functions will be n⋅m;

- the number of impulse functions with the same amplitude values at the positive half wave of the sine wave will be equal to n / 4 and the same number will be at the negative half wave of the sine wave. Together this amounts to n / 2. For switching impulse functions, the set of which approximates the sinusoidal phase voltages, in a multiphase system, using the symmetry properties, m⋅n / 2 keys will be required;

- in the proposed device to reduce the number of power switches, a block of diodes is used. The diode block contains the diode modules D1, D2 ... Dm, the number of which m is equal to the number of phases. The signals from the decoder of the control unit are fed to the inputs of the diodes of each module D1, D2 ... Dm. In each module of the diodes D1, D2 ... Dm, the outputs of the diodes are connected in pairs and fed to the control electrodes of the power switches. The numbers of the pairwise connected diodes are determined by the symmetry properties of the sinusoidal function. The signals coming from the control unit through pairwise connected diodes translate one of the keys in each phase into the open state for the duration of the input control signal;

- the number of keys required for switching pulse functions when using a block of diodes will be m⋅n / 2. This is half the number of keys in a circuit that does not use a block of diodes. In some cases, the number of keys may be less than m⋅n / 2.

- The sequence of pulses with the required amplitude values in each phase of the generator is set by the control device and the switching circuit of the diode block. As controlled keys, triacs, transistor switches of the required polarity based on MOS transistors and IGBT transistors, thyristors can be used. The switching matrix together with the block of diodes can be implemented using the technology of manufacturing microcircuits.

III. Disclosure of the invention

III. 1 Block diagram of the device

The block diagram of the device is shown in the figure of FIG. 2.

In the figure of FIG. 2 shows the following device blocks:

1. The control unit 9. Provides a cyclical, with a given period T, alternate supply of control pulses that control the opening of electronic keys located in the switching unit;

2. Block of diodes 14. Contains modules D1, D2, D3. Using each module, the diode outputs are paired together and the signal is transmitted from the control unit to the control electrodes of the power switches

3. The switching unit 15 provides a connection to the output terminals of the switching unit 12 ₁ ... 12 _{m of the} sources generated by the power supply 16.

4. The power supply 16 generates constant voltage of a given value E1, E2, E3, E4 = -E1, E5 = -E2, E6 = -E3. The source voltages are connected with switches 10r, s (r = 1 ... .m, s = 1 ... n / 2) located in the switching unit 15 to the output terminals of the switching unit 12 ₁ ... 12 _m . Voltages of positive and negative polarity are formed as a result of a series connection of the same voltage sources. As power sources can be taken galvanic batteries, rechargeable and capacitor banks, etc.

In the figure of FIG. 2 shows a structural diagram of the device with an indication of the external poles of the blocks, with which the blocks are connected and controlled, and the numbering of the blocks is shown in accordance with the general circuit diagram:

9 - control unit;

14 - block of diodes;

15 - switching unit;

16 - power supply;

In the figure of FIG. 2 shows the poles 8 ₁ ... 8 _n , 11 ₁ ... 11 _{n / 2} , 8 _pk (p, k = 1 ... n), by means of which the blocks interact and the poles 6 and 13, by which the device is controlled. The pole numbers are indicated in accordance with the general circuit diagram of the device. The signal for starting the device is entered using pole 6. The number of time intervals n, into which the period of the sinusoidal function T is divided, is entered using pole 13. Using poles 8 ₁ ... 8 _n, the control unit 9 and the block of diodes 14 are connected using poles 11 ₁ ... 11 _{n / 2} power supply 16 is connected to the switching unit 15, using the poles 8 _{p, k} (p, k = 1 ... n) the diode block 14 is connected to the switching unit 15, the poles 12 ₁ ... 12 _m are output, the load is connected to them.

III. 2 control unit

The circuit of the control unit is shown in the figure of FIG. 3. The control unit 9 is designed to generate control pulses as a result of creating a sequence of rectangular pulses of a given duration TI and supplying these signals to the inputs of the diodes located in the modules D1, D2, ... Dm of the diode unit 14. The control unit generates a pulse sequence cyclic with a period T. The value of T is equal to the period of the sinusoidal function. The number of pulses per period T is n, the duration of one pulse TI = T / n. The values of n and TI are selected based on considerations of ensuring the required error of approximation of the sinusoidal function by a sequence of rectangular impulse functions and the cost of implementing the device. With an increase in n and a decrease in TI, the error decreases and the cost increases. For the sinusoidal function shown in the figure of FIG. 1 the number of time intervals is 12. Using electronic keys located in the switching unit 15, the EMF sources E1, E2, E3, E4 = -E1, E5 = -E2, E6 = -E3 generated by the power supply 16 are connected to the given ones by the block control time points in accordance with a given algorithm to the output poles 12 ₁ ... 12 _m of the switching unit 15. Switching is carried out in the open state of the key. The duration of the open state of each key is equal to TI. The amplitude values of the pulse sequences for each phase for specific values of n = 12 and the number of phases m = 3 are shown in table 1.

The schematic diagram of the control unit is shown in the figure of FIG. four.

The block is implemented on elements 1-7. It contains a clock pulse generator (GTI) 1, a logic element AND 2, a counter 3 of the number of pulses on the period T of the periodic function, a comparison circuit 4, register 5, a decoder 7 with the number of pins n equal to the number of pulse functions on the period T. The output poles of the block control 8 ₁ ... 8 _{n are} connected to the inputs of the diodes located in the modules D1, D2, D3. The device is started by applying a signal at input 6. At input 13, a code is written for the number of time intervals n.

The output of the GTI 1 is connected to the first input of the And 2 element, the second input of which is connected to the first input 6 of the device, and the output is connected to the first input of the counter 3, the output of which is connected to the input of the decoder 7 and to the first input of the comparison circuit 4, the second input of which is connected to the output of the register 5, and the output to the second input of the counter 3, the input of the register 5 is connected to the input 13 of the device, the outputs of the decoder 7 are connected to the inputs 8 ₁ ... 8 _n , through which the control unit is connected to the block of diodes. The output poles of the decoder 8 ₁ ... 8 _n located in the control unit 9 are input to the modules D ₁ ... D _m located in the block of diodes 14. This is shown in the figure of FIG. 2.

III. 3 block of diodes

The diode block includes modules D1 ... Dm as shown in the figures of FIG. 4a, b.v and FIG. 2. Modules D1 ... Dm consist of a set of diodes Ds, r, where s = 1 ... 12 and corresponds to the pole number 8s of the control unit, r is the module number, r = 1 ... m, where m is the number of phases of the multiphase system. The module number r is equal to the phase number. Diodes Ds, r with the same index number r belong to the module Dr. The input of the diode with index s is connected to the 8 _s pole of the control unit. So, the diode D1,1 is located in the first module and is connected to the pole 8 ₁ . In each module, the outputs of the diodes are connected in pairs according to the symmetry properties of the sinusoidal function. Switching the outputs of the diodes of the modules D1 ... D3 for a three-phase system, respectively, according to the figure of FIG. 1 and table 1 are shown in the figure of FIG. 4. The output poles of each module are supplied to the control electrodes of the switching unit 15. For example, according to the first row of table 1, which corresponds to the first phase of the device, pulses corresponding to the first and sixth time intervals have an amplitude E1. So in the D1 module, the outputs of the diodes D1,1 and D6,1 must be combined and fed to the control electrode of the power switch, which connects a source with an amplitude of E1 to the output pole of the first phase of the switching unit. This output pole of module D1 is indicated in Fig. 4a by indices 8 _1.6 . Similarly to the considered example, the outputs of the remaining diodes of the modules D1 ... Dm are combined and connected to the control electrodes of the power switches located in the switching unit 15. For module D1, this is shown in Fig. 4a, for module D2 in Figure 46, for module D3 in Figure 4c .

III.4 Power Supply

The power supply 16 is designed to generate a set of constant sources of constant voltage, the EMF values of which are equal to the amplitude values of the pulses of the approximating sinusoid function.

For the case m = 3, n = 12, according to the drawing of FIG. 1, these are E1, E2, E3, E4 = -E1, E5 = -E2, E6 = -E3.

The power supply can be made in various versions, depending on the purpose of the device (stationary or mobile), load power, technical requirements.

Let us consider the implementation of a power supply for the case of powering mobile devices and using small-sized, single-type constant voltage sources with the same voltage values as power sources. It can be - galvanic power supplies of types R, LR, SR, CR of classes D, C, AA, AAA, PP3, rechargeable or capacitor batteries. The power supply circuit is shown in the figure of FIG. 5. The power supply through the poles 11 ₁ , 11 ₂ , 11 ₃ , 11 ₄ , 11 ₅ , 11 _{6 is} connected to the switching unit. All power supplies are connected to each other in series with the conclusion of the midpoint (pole) to the pole "ground". Power supplies 17 ₁ ... 17 _{n / 4 of} positive polarity are connected in series with each other. For n = 12, these are sources 17 ₁ , 17 ₂ , 17 ₃ . Sources of negative polarity 17 _{n / 4 + 1} ... 17 _{n / 2 are} connected in series. For n = 12, these are sources 17 ₄ , 17 ₅ , 17 ₆ . By pole January ₁₁ connects a power source with voltage E ₁ = E, the pole February ₁₁ are connected two series connected source so that their voltage is E ₂ = 2E _1, the pole on March _11, are connected three series connected source to each source voltage E ₁ , their total voltage is E ₃ = 3E ₁ . By pole April ₁₁ connects the power supply with a voltage of E = -E _4, the pole on May ₁₁ connect two serially connected with the voltage source -E each source, the total voltage E = ₅ -2E _1, the pole ₁₁ June connected three series-connected source with the voltage of each - E, their total voltage is E ₆ = -3E. This allows one to obtain voltages that are multiples of the voltage of one source E. The sequence of sources with these voltage values allows us to approximate the sinusoidal phase voltages. Table 1 contains the voltage values of pulsed sources for the number of time intervals n = 12 and the number of phases m = 3.

The transformer circuit of the power supply unit when powered by AC power and the circuit of the power supply unit from the battery using the DC / DC converter are described in [1].

III. 5 switching unit

The circuit of the switching unit for m = 3, n = 12 is shown in the figure of FIG. 6. Using the switching unit 15, the voltage sources coming from the power supply 16, through the poles 11 ₁ ... 11 _{n / 2 are} connected by power switches 10 _rs at the corresponding time intervals (κ-1) TI≤t≤kTI, k = 1, 2 , ... n

to the output poles of block 12 ₁ ... 12 _m . In the written expression, TI is the duration of the time interval of one voltage pulse, n is the number of time intervals in the period T, m is the number of phases of the generator, n is the number of time intervals in the period T. Switching is performed using controlled electronic keys 10 _{r, s} , where r = 1 ... m, s = 1 ... n / 2. The pulses that control the open state of each electronic switch come from the poles 8 ₁ ... 8 _n of the control unit by means of modules D1, D2, D3 of the diode block 14 to the control electrodes of the power switches.

For phase 1, the pulse from the control unit from the pole 8 ₁ to the first time interval and from the pole 6 to the sixth time interval enters the switching unit 15 to the control electrode of the power switch 10 _1.1 from the pole 8 _1.6 . In the open state of this key, the voltage of the EMF source E1 is supplied to the output of the device to the pole 12 ₁ . The key open state time is TI.

For phase 2, the pulse from the control unit from the pole 8 ₁ in the first time interval and from the pole 8 ₂ in the second time interval enters the switching unit 15 to the control electrode of the power switch 10 _2,1 from the pole 8 _1,2 . In the open state of this key, the voltage of the EMF source -E3 is supplied to the output of the device to the pole 12 ₂ . The key open state time is TI.

For phase 3, the pulse from the control unit from the pole 8 ₁ to the first time interval and from the pole 8 ₁₀ to the tenth time interval enters the switching unit 15 to the control electrode of the power switch 10 _3.1 from the pole 8 _1.10 . In the open state of this key, the voltage of the emf source E2 is supplied to the output of the device to the pole 12 ₃ . The key open state time is TI.

The work of the remaining power switches 10 _{r, s} where r = 1 ... m, s = 1 ... n / 2, is similar to the described processes for phases 1, 2 and 3.

IV. Brief Description of the Drawings

FIG. 1 Approximation of sinusoidal voltage functions of a three-phase system by a sequence of impulse functions for n = 12

FIG. 2 Block diagram of the device

FIG. 3 Schematic diagram of the control unit

FIG. 4 Schemes of modules D1, D2, D3 of the block of diodes.

FIG. 4a Diagram of module D1

FIG. 4b D2 module diagram

FIG. 4c Diagram of the D3 module

FIG. 5 Schematic diagram of the power supply for n = 12

FIG. 6 Schematic diagram of the switching unit for a three-phase source m = 3, n = 12

V. The implementation of the invention

Description of the operation of the device. In the initial state, a code of the number of time intervals n is recorded on the register 5 at the input 13. The period of the sinusoidal function T is divided into this number of intervals when the sinusoidal function is approximated by a sequence of impulse functions. On the counter 3, a zero code is stored (the reset input to zero on the counter 3 in Fig. 3 is not shown). The operation of the device begins after a start signal is supplied at input 6 of logic element And 2. After a start signal is supplied, pulses from the output of the clock pulse generator 1 through the open element And 2 begin to flow to the input of counter 3. The code from the output of counter 3 goes to the input of decoder 7. On the output of the decoder appears a single signal only at one of its n outputs. A single signal at the i-th (i = 1 ... n) output of the decoder 7 is fed to the input of the block of diodes 14 through one of the poles 8 _i , where

i = 1 ... n. The poles 8 _i , i = 1 ... n, are input for the diodes of the modules D1, D2, ..., Dm of the block of diodes. So, the pole 8 _{1 is} connected to the input of the diode D1,1 of the module D1, the input of the diode D1,2 of the module D2, the input of the diode D1, m of the module Dm. Similarly, the poles 8 _i , i = 2 ... n are connected to the input poles of the diodes of the modules D1, D2, ... Dm. This is shown in the figure of FIG. 4. The output poles of the diodes of each module are combined in pairs in accordance with the symmetry properties of the sinusoidal function recorded in expression (1). In the figure of FIG. 4 shows the pairwise combination of the output poles of the diodes of the modules D1, D2, D3 for the case m = 3.

Let us explain the combination of the output poles of the diodes of the module D1, with the help of which the voltage of the EMF sources of block 16 is connected to the output pole of the first phase of the device 12 ₁ . For the module D1, the output poles of the diodes D1,1 and D1,6, D2,1 and D5,1, D3,1 and D4,1, D7,1 and D12,1, D8,1 and D11,1, D9,1 and D10, l. The combined output poles of the diodes are the output for the module D1. Such poles for the module D1 are 8 _1.6 , which combines the output poles of the diodes D1.1 and D1.6, the poles 8 _2.5 , 8 _3.4 , 8 _7.12 , 8 _8.11 , 8 _9.10 . The combination of the output poles of the diodes with the indicated indices is explained by the symmetry properties of the sinusoidal function.

The first row of table 1 shows that the amplitudes of the pulses with numbers 1 and 6, 2 and 5, 3 and 4, 7 and 12, 8 and 11, 9 and 10 are the same. For 1 and 6 time intervals, the pulse amplitudes are equal to E1. The control signal from the pole 8 _1,6 , which is the output for the module D1, is fed to the control electrode of the power switch 10 _1,1 located in the switching unit 15, and opens the key to the time interval TI in the first or sixth time interval. As a result, the EMF source with a voltage of E1 is connected at the indicated time intervals to the pole of the first phase of the device 12 ₁ . Similarly, the connection of the EMF sources of the power supply 16 to the pole 12 ₁ for the remaining time intervals.

The control signals taken from the output poles of the D2 module allow you to control the connection of the EMF sources of the power supply 16 to the pole of the second phase 12 ₂ .

The control signals taken from the output poles of the D3 module allow you to control the connection of the EMF sources of the power supply 16 to the pole of the second phase 12 ₃ .

Connection of power supplies 17 ₁ ... 17 _{n / 2} with voltages E ₁ ... E _{n / 2} to the output poles of the switching unit 12 ₁ ... 12 _{m is} carried out using controlled electronic switches 10 _{r, s} , r = 1 ... m, s = 1 ... n / 2. The switching unit 15 is connected to the power sources of the power supply 16 through the poles 11 ₁ ... 11 _{n / 2} . Power switches are located in the switching unit 15, the figure of FIG. 6. The signals that control at the moment of time TI = T / n the open state of the key are received from the output of the decoder of the control unit through the poles 8 ₁ ... 8 _n . The control unit sets the sequence of control pulses. The control pulse coming from the pole 8 _j , j = 1 ... n, is followed by the control pulse from the pole 8 _{j + 1} until j + 1 becomes equal to n. After the termination of the pulse from the output 8 _{n, the} pulse 8 _{1 is} turned _on . In this case, the current value of the counter of the number of pulses 3 will coincide with the number n set with input 13, the counter is reset and the process is repeated.

VI. Literature

1. Patent No. 2016127384, IPC H05B 1/00, 2017. L. Gavrilov EMF multiphase generator

Claims (8)

A generator of a multiphase EMF system using a diode block, comprising a power supply 16, a switching unit 15, a diode block 14, a control unit 9, consisting of a clock pulse generator (GTI) 1, element 2, counter 3, comparison circuit 4, register 5, the start button of the device 6, the decoder 7, the input for setting the number of time intervals 13, the GTI output 1 is connected to the first input of the And 2 element, the start button of the device 6 is connected to the second input of the And 2 element, the output of the And 2 element is connected to the first input of the counter 3, whose output is connected to the input of the decoder 7 and to the first input of the comparison circuit 4, the output of the comparison circuit 4 is connected to the second input of the counter 3, the register 5 is connected to the second input of the comparison circuit 4 at the input 13 of which the number of time intervals n on the period T is entered, from the output of the counter 3 pulses are received to the input of the decoder 7, characterized in that the control unit 9 poles 8 ₁ ... 8 _{n is} connected to the block of diodes 14, which contains the modules D1, D2, ... Dm, m is the number of phases of the device, the modules D1 ... Dm consist of a set of diodes Ds, r, where s = 1 ... n and corresponds to the pole number 8s of the control unit Ia, r - the module number, r = 1 ... m, diode Ds, r of the same index number r belong Dr module diode input to the index s connected to the pole 8 _s control unit, each module diode outputs are connected in pairs respectively symmetry properties sinusoidal functions (the option n = 12, m = 3 is considered later), for module D1, the outputs of the diodes D _1.1 and D _6.1 , D _2.1 and D5.1, D3.1 and D _4.1 , D _7.1 and D _12.1 , D _8.1 and D _11.1 , D _9.1 and D _10.1 , for module D2, the outputs of the diodes D _1,2 and D _2,2 , D _3,2 and D _12,2 , D _4,2 and D _11,2 , D ₅ , ₂ and D _10,2 , D ₆ are connected in pairs ₂ and D _9.2 , D _7.2 and D _8.2 , for module D3, the outputs of the diodes D _1.3 and D _10.3 , D _2.3 and D _9.3 , D _3.3 and D _8.3 , D _4.3 and D _7.3 , D _5, are connected in pairs ₃ and D _6.3 , D ₁₁ , ₃ and D _12.3 , the outputs of pairwise connected diodes are connected to the control electrodes of the power switches 10 _r , _s , where r = 1 ... m, s = 1 ... n / 2, so that the output poles of the D1 module are connected to the control electrodes of the power switches, which control the connection of the EMF sources power to the output pole of the first phase of device 12 ₁ poles of the output D2 of the module are connected to the control electrodes of the power switches which control connection of a second source of EMF phase power supply to an output device 12 pole ₂ Dm output poles connected to the driving unit m electrodes of power switches that control the connection of the EMF power supply sources to the output pole of the device 12 _m phase number m, the pole 8 _{1.6 of} the D1 module is connected to the key control electrode 10 _1.1 , the pole 8 _{2.5 is} connected to the key control electrode 10 _1.2 , the pole 8 _{3.4 is} connected to the key control electrode 10 _1.3 , the pole 8 _7.12 connects to the control electrode of the key 10 _1.4 , pole 8 _8.11 connects to the control electrode of the key 10 _1.5 , pole 8 _9.10 connects to the control electrode of the key 10 _1.6 , for module D2, pole 8 _{1,2 is} connected to the key control electrode 10 _2,1 , pole 8 _{3,12 is} connected to the key control electrode 10 _2,2 , pole 8 _{4,11 is} connected to the key control electrode 10 _2,3 , pole 8 _5.10 connects to the control electrode of the key 10 _2.4 , pole 8 _6.9 connects to the control electrode of the key 10 _2.5 , pole 8 _7.8 connects to the control electrode of the key 10 _2.6 , for the D3 module, pole 8 _{1.10 is} connected to the key control electrode 10 _3.1 , pole 8 _{2.9 is} connected to the key control electrode 10 _3.2 , pole 8 _{3.8 is} connected to the key control electrode 10 _3.3 , pole 8 _4.7 connects to the control electrode of the key 10 _3.4 , pole 8 _5.6 connects to the control electrode of the key 10 _3.5 , pole 8 _11.12 connects to the control electrode of the key 10 _3.6 , inputs of power switches 10 _{r, s} connected to the poles 11 _s , s = 1 ... n / 2, which are the output poles of the power supply 16, the EMF sources 17s, s = 1 ... n / 2, which are between are connected in series, the midpoint of the connection is connected to the ground pole, the positive pole of the source 17 _{1 is} connected to the pole 11 ₁ and the negative pole of the source 17 ₂ , the negative pole of this source is connected to the pole ground and the positive pole of the source 17 ₄ , positive the pole of the source 17 _{2 is} connected to the pole 11 ₂ and the negative pole of the source 17 ₃ , the positive pole of the source 17 _{3 is} connected to the output for the block pole 11 ₃ , the negative pole of the source 17 _{4 is} connected to the output pole 11 ₄ and the positive pole at source 17 ₅ , the negative pole of source 17 ₅ is connected to the output pole 11 ₅ and the positive pole of source 17 ₆ , the negative pole of source 17 _{6 is} connected to the output pole 11 ₆ , the output poles of the power switches are connected to the output poles of the device 12 ₁ , 12 ₂ ... 12m so that the output poles of the keys 10 _{1, s} , s = 1 ... n / 2 are connected to the output pole of the device 12 ₁ , the output poles of the keys 10 _{2, s are} connected to the output pole of the device 12 ₂ , the output poles of the keys 10 _{m, s} connected to the output pole of the device 12 _m , as a result of using the unit and diodes 14, each power switch 10 _{r, s} is in the open state during the duration of the pulse TI not once during the period T, but twice for different pulse numbers and each time transmits the same voltage values to the output of the device.

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