RU2704494C1 - Single-key multiphase electric drive - Google Patents

Abstract

FIELD: electromechanics; engines.

SUBSTANCE: invention relates to the field of electromechanics, namely to the electric drive with a multiphase valve-inductor motor (VID), and is intended for actuation of machines and mechanisms. Technical result is achieved by the fact that single-key multi-phase electric drive containing two capacitors, three diodes, PC and VID with stator winding divided into two parts, two constant voltage sources, wherein the plus of the first source is connected to the positive of the first capacitor, to the diode anode, the cathode of which is connected to the beginning of the first winding part, to the diode cathode; minus second source is connected to negative of second capacitor, to end of part of second winding, to anode of diode; that in circuit for each of n phases there added is 2 diodes, connected as follows: cathode of the first diode is connected to minus of first source, anode is connected to first terminal of PC, to negative of first capacitor, to diode anode, cathode of which is connected to beginning of part of second winding; anode of the second diode is connected to the positive of the second source, the cathode is connected to the second terminal of the PC, the positive of the second capacitor and the end of the part of the first winding, besides, the number of phases connected to the sources is not limited and equals 1, 2, …, n. In the proposed electric drive circuits of currents of different phases are separated from each other, which ensures operability of multiphase LED, and namely enables to switch phases at different times.

EFFECT: technical result achieved by invention consists in expansion of functional capabilities of single-key electric drive for multiphase valve-inductor drives.

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Description

The invention relates to electromechanics, and in particular to an electric drive with a multiphase induction induction motor (VID) and is intended to propel machines and mechanisms.

Known electric drives with VID close to the claimed electric drive on the basis of the presence in the power circuit of one semiconductor key (PC) per phase [Miller T. Switched Reluctance Motors and Their Control. Magna Physics Publishing and Oxford University Press. Oxford 1993, c. 88, fig. 6.4 (b)], the main disadvantage of which is that when the PC is turned off, the electromagnetic energy accumulated in the VID stator winding is not recovered into the network, but is extinguished by the resistor, and [RF Patent No. 2119227. Single-key electric drive / A.D. Petrushin, V.Yu. Deinichenko / B.I. 1998. No. 26], the main disadvantage of which is the unequal power conditions of the parts of the VID winding.

The closest in technical essence to the claimed electric drive (prototype) is a single-key electric drive containing two voltage sources, two capacitors, three diodes, a PC and a view with a stator winding, divided into two parts [RF Patent No. 2459341 Single-key electric drive / A.D. Petrushin, P.M. Devlikamov, V.Yu. Delicious. - No. 20111119730/07; declared 05/16/2011; publ. 08/20/2012 bull. No. 23]. However, this scheme is applicable only for single-phase VIDs and is inoperative for multiphase VIDs, which is illustrated in Fig. 1 application number 1. When you connect several phases to the sources and open one PC, all phases receive power, therefore, the VID will be inoperative, since the phases must be turned on at different times.

The invention solves the problem of ensuring the operability of a single-key electric drive for multiphase VID.

This is achieved by the fact that in the single-key electric drive circuit containing two capacitors, three diodes, a semiconductor switch (PC) and a valve-induction motor (VID) with a stator winding, divided into two parts, two DC voltage sources, while the plus of the first source is connected with the plus of the first capacitor, with the anode of the diode, the cathode of which is connected to the beginning of the first winding, with the cathode of the diode; the minus of the second source is connected to the minus of the second capacitor, with the end of part of the second winding, with the anode of the diode; according to the invention, 2 diodes are additionally introduced into the circuit for each of the n phases, connected as follows: the cathode of the first diode is connected to the minus of the first source, the anode is connected to the first output of the PC, to the minus of the first capacitor, to the anode of the diode, the cathode of which is connected to the beginning of the part second winding; the anode of the second diode is connected to the plus of the second source, the cathode is connected to the second terminal of the PC, the plus of the second capacitor and the end of the part of the first winding, and the number of phases connected in this way to the sources is not limited and equal to 1, 2, ..., n.

The invention is illustrated graphically. In FIG. 1 shows the power circuit of a single-key multiphase electric drive. The single-key multiphase electric drive circuit consists of two voltage sources 1 and 2, PC 3, 13, n, capacitors 6, 7, 16, 17, n + 3, n + 4, diodes 4, 5, 8, 9, 12, 14, 15, 18, 19, 22, n + 1, n + 2, n + 5, n + 6, n + 9, stator windings, each of which is divided into two parts 10, 11, 20, 21, n + 1 , n + 8.

The plus of source 1 is connected to the pluses of the capacitors 7, 17, n + 4, to the cathodes of the diodes 12, 22, n + 9, to the anodes of the diodes 9, 19, n + 6; the cathode of the diode 9 is connected to the beginning of part of the first winding VID 11; the cathode of the diode 19 is connected to the beginning of part of the first winding VID 21; the cathode of the diode n + 6 is connected to the beginning of part of the first winding of the VID n + 8; minus source 1 is connected to the cathodes of the diodes 5, 15, n + 2; the anode of the diode 5 is connected to the first output of the PC 3, with the minus of the capacitor 7, with the anode of the diode 8; the anode of the diode 15 is connected to the first output of the PC 13, with the minus of the capacitor 17, with the anode of the diode 18; the anode of the diode n + 2 is connected to the first output of the PC n with the minus of the capacitor n + 4, with the anode of the diode n + 5; the cathode of the diode 8 is connected to the beginning of the second part of the VID 10; the cathode of the diode 18 is connected to the beginning of part of the second winding of the VID 20; the cathode of the diode n + 5 is connected to the beginning of the part of the second winding of the VID n + 7; plus source 2 is connected to the anodes of diodes 4, 14, n + 1; the cathode of the diode 4 is connected to the second output of the PC 3, with the plus of the capacitor 6, with the end of the part of the first winding VID 11; the cathode of the diode 14 is connected to the second output of the PC 13, with the plus of the capacitor 16, with the end of the part of the first winding VID 21; the cathode of the diode n + 1 is connected to the second terminal of the PC n, with the plus of the capacitor n + 3, with the end of the part of the first winding of the VID n + 8; minus source 2 is connected to the minuses of the capacitors 6, 16, n + 3, to the ends of the second part of the winding VID 10, 20, n + 1, to the anodes of the diodes 12, 22, n + 9;

The single-key multiphase electric drive operates as follows. In the initial state, when the PCs 3, 13, n are open, there is no current in all parts of the VID stator windings, and all capacitors are charged with the polarity shown in FIG. 1. When PC n is closed (n-th phase is working), current flows through the two circuits through the stator winding parts n + 7 and n + 8. First circuit: source 1 - diode n + 6 - part one of the stator winding n + 8 - PC n - diode n + 2 - source 1; capacitor n + 4 performs the function of a filter, that is, it partially compensates for the voltage drop at the internal resistance of source 1. Second circuit: source 2 - diode n + 1 - PC n - diode n + 5 - part two of the stator winding n + 7 - source 2; the capacitor n + 3 performs the function of a filter, that is, it partially compensates for the voltage drop at the internal resistance of source 2. At the same time, electromagnetic energy is converted into mechanical energy in the VID. When PC n is opened, the energy accumulated in the inductances of the parts of the stator winding n + 7 and n + 8 charges the capacitors n + 3 and n + 4 in the following circuits: part one of the stator winding n + 8 - capacitor n + 3 - diode n + 9 - diode n + 6 - part one of the stator winding n + 8; part two of the stator winding n + 7 - diode n + 9 - capacitor n + 4 - diode n + 5 - part two of the stator winding n + 1. Next, the cycle repeats. The remaining phases work similarly.

In the claimed single-phase multi-phase electric drive, with the help of diodes 4, 5, 14, 15, n + 1, n + 2, the current circuits of the various phases are separated from each other, which ensures the operability of the multi-phase VID, namely it makes it possible to turn on the VID phases independently friend at different times.

ANNEX No. 1

Single-key electric drive circuit (RF Patent No. 2459341 Single-key electric drive / A.D. Petrushin, PM Devlikamov, V.Yu. Smachny. - No. 20111119730/07; Claim 05.16.2011; publ. 08.20.2012 Bulletin No. 23) is applicable only for single-phase VID and inoperable for multiphase VID. Shown in fig. 1, the circuit is obtained from a single-key electric circuit according to paragraph 2 of the claims by adding several phases. When several phases are connected to the sources and one PC is opened, all phases are powered, for example, when you open PC n through the following circuits: source 1 - diode n + 4 - half-winding n + 6 - PC n - source 1, source 2 - PC n - diode n + 3 - half-winding n + 5 - source 2, source 1 - diode n + 4 - half-winding n + 6 - PC n - diode 14 - half-winding 16 - source 2, source 1 - diode 15 - half-winding 17 - PC n - diode n + 3 - half-winding n + 5 - source 2, source 1 - diode n + 4 - half-winding n + 6 - PC n - diode 6 - half-winding 8 - source 2, source 1 - diode 7 - half-winding 9 - PC n - diode n + 3 - semi-winding n + 5 - source 2, investigator But, the VIEW will be inoperative, since the phases must be included at different times.

Claims (1)

Single-key multiphase electric drive, containing two capacitors, three diodes, a semiconductor switch (PC) and a induction motor (VID) with a stator winding, divided into two parts, two DC voltage sources, while the plus of the first source is connected to the plus of the first capacitor, with the anode of the diode, the cathode of which is connected to the beginning of the first winding, with the cathode of the diode; the minus of the second source is connected to the minus of the second capacitor, with the end of part of the second winding, with the anode of the diode; characterized in that 2 diodes are additionally introduced into the circuit for each of the n phases, connected as follows: the cathode of the first diode is connected to the minus of the first source, the anode is connected to the first output of the PC, to the minus of the first capacitor, to the anode of the diode, the cathode of which is connected to the beginning of the second part of the winding; the anode of the second diode is connected to the plus of the second source, the cathode is connected to the second terminal of the PC, the plus of the second capacitor and the end of the part of the first winding, and the number of phases connected in this way to the sources is not limited and equal to 1, 2, ..., n.

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