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Electric motor driving system

A drive system and motor technology, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve the problems of inability to realize power distribution and power transmission, etc.

Active Publication Date: 2019-10-01
DENSO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, although JP-2007-14185-A discusses techniques for transferring power from one power source to another, the voltage magnitude is used as a parameter for power transfer
Therefore, when such parameters are applied to the rectangular voltage wave control system of JP-2010-124544-A, since the voltage amplitude is fixed at the maximum value, neither power transmission nor power distribution can be realized in this system

Method used

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  • Electric motor driving system
  • Electric motor driving system
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Embodiment Construction

[0022] In the following, various embodiments of the invention and variations thereof are described with reference to the applicable drawings. The motor drive system of each embodiment of the present invention is a drive system that operates a motor generator (hereinafter simply referred to as MG) of a three-phase AC motor that is used as power for hybrid vehicles and electric vehicles. source to control the drive of the MG. The motor and motor drive system are sometimes referred to hereinafter as MG and MG control system, respectively.

[0023] Referring now to the drawings, in which like reference numerals denote like or corresponding parts throughout the several views thereof, in particular figure 1 In , the overall structure of a system employing so-called dual power sources and dual inverters (ie, pairs of power sources 11, 12 and pairs of inverters 60, 70) is shown. Specifically, MG 80 is provided as a permanent magnet synchronous motor type having a three-phase AC moto...

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Abstract

An electric motor driving system controls driving of an electric motor having windings of two or more phases each having open ends by using a pair of inverters. A control unit includes a first inverter control circuit that generates a first voltage instruction output to the first inverter based on a torque instruction and a second inverter control circuit that generates a second voltage instruction output to the second inverter based on the torque instruction. At least one of the inverter control circuits includes an electric power controller that controls allocation of electrical power supplied from a pair of power supplies to the pair of inverters, respectively, by either advancing or delaying an angle of a phase of each of vectors of voltage instructions in accordance with the target electric power instruction during execution of torque feedback control.

Description

technical field [0001] Embodiments of the present invention relate to a motor drive system that drives a motor by using a pair of inverters. Background technique [0002] Pairs of inverters are known to be respectively connected across open windings of an alternating current (AC) motor and to drive the AC motor through their outputs. For example, as discussed in Japanese Patent No. 3352182 (JP-3352182-B), an inverter system includes circuits of a so-called dual power source and dual inverter system. The inverter system combines outputs from a first inverter and a second inverter that have polarities opposite to each other. [0003] A technique is also known in which power is transferred from one of a pair of direct current (DC) power supplies to the other of the pair of DC power supplies. For example, Japanese Unexamined Patent Application Publication No. 2007-14185 (JP-2007-14185-A) discusses a power conversion system (ie, a converter) including a circuit having a pair of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/16H02P27/06H02P21/18H02P25/22
CPCH02P25/16H02P27/06H02P21/18H02P25/22H02M7/53871H02P2205/05H02P21/20H02P25/024
Inventor 冈晴香小俣隆士松原清隆中村诚野边大悟
Owner DENSO CORP