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ZVS Realization Method of Current Source Dual Three-phase Permanent Magnet Synchronous Motor Drive System

A dual-phase permanent magnet, current source technology, used in control systems, AC motor control, high-efficiency power electronic conversion, etc. Density, the effect of improving efficiency

Active Publication Date: 2020-10-09
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of soft switching technology can effectively solve the shortcomings of large losses in current source power converters. The existing soft switching technology for current source inverters is mainly for IGBT or GTO to achieve natural commutation, which is suitable for high-power applications

Method used

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  • ZVS Realization Method of Current Source Dual Three-phase Permanent Magnet Synchronous Motor Drive System
  • ZVS Realization Method of Current Source Dual Three-phase Permanent Magnet Synchronous Motor Drive System
  • ZVS Realization Method of Current Source Dual Three-phase Permanent Magnet Synchronous Motor Drive System

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Embodiment Construction

[0019] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The zero voltage switching strategy disclosed in the present invention is used for figure 1 The current source type dual three-phase permanent magnet synchronous motor drive system shown, the drive system includes: power side chopper 1.2, DC bus inductor 1.3, resonant inductance branch 1.4 and resonant capacitor branch 1.5 connected in parallel to form a zero voltage switch Auxiliary Circuit, Current Source Inverter 1.6, Current Source Inverter 1.7. The power supply side chopper 1.2 includes: a first switching tube S 1 and the second diode D 2 The first bridge arm composed of series connection, and the second switch tube S 2 and the first diode D 1 connected in series to form the second bridge arm. The resonant inductance branch 1.4 consists of the resonant inductance L r , the third diode D 3 , the third switch tube S 3 Composed in s...

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Abstract

The invention discloses a ZVS realization method of a current source type double-three-phase permanent magnet synchronous motor drive system, and belongs to the technical field of power generation, power transformation or power distribution. In this method, two current source inverters are connected in series to the stator windings of the dual three-phase permanent magnet synchronous motor, and the current vector action sequence of each current source inverter is selected by comparing the motor line voltage so that the inverter The input voltage of the corresponding bridge arm of the transformer decreases in sequence according to the action sequence of the current vector, and the ZVS is realized by controlling the charge and discharge of the resonant capacitor, which can reduce the dv / dt of the wide-bandgap semiconductor and suppress the electromagnetic interference of the high-frequency converter. At the same time, the addition of the soft switch improves the efficiency of the system, helps to increase the power density of the system, and reduces the heat dissipation cost of the converter.

Description

technical field [0001] The invention discloses a ZVS (Zero Voltage Switching, zero-voltage switch) implementation method of a current source type dual-three-phase permanent magnet synchronous motor drive system, relates to motor drive technology and soft switching technology, and belongs to the technical field of power generation, power transformation or power distribution. Background technique [0002] At present, the power of the motor system is constantly increasing, and correspondingly, the size of the motor is also continuously expanding. The stator windings of the traditional three-phase motor system are three-phase, and the power of the motor is increased by connecting the three-phase windings in series and parallel, and the three-phase power converter is used to feed the motor. However, the traditional three-phase motor windings are concentrated and distributed in the motor. The entire space is therefore not conducive to the modular production and assembly of the mot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5387H02M1/44H02P27/06H02P25/022
CPCH02M1/44H02M7/53875H02P25/022H02P27/06H02M1/0058Y02B70/10
Inventor 王政徐阳刘鹏程程明
Owner SOUTHEAST UNIV
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