Control apparatus and method for motor drive system

A technology for controlling equipment and driving systems, which is applied in the control of motor vibration, motor generator control, AC motor control, etc., to prevent torque fluctuations and improve accuracy.
CN101326708AInactive Publication Date: 2008-12-17TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2008-12-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

In the rectangular-wave voltage control mode, torque feedback control, in which the voltage phase (phiv) of the rectangular-wave voltage is adjusted based on the deviation of the torque estimated value (Trq) from the torque command value (Trqcom), is performed. A torque estimation portion (420) calculates the torque estimated value (Trq) using the motor currents (Id, Iq) calculated based on the values detected by a current sensor (24) and a rotational position sensor (25), as in the case of the PWM control mode. Namely, the same state quantity (quantity detected by the sensors) of the alternating-current motor (M1) is used in the motor control in both the rectangular-wave voltage control mode and the PWM control mode.
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Description

technical field

[0001] The present invention generally relates to control apparatus and methods for motor drive systems. More particularly, the present invention relates to a control apparatus and method for a motor driving system that converts DC voltage into AC voltage with an inverter to drive and control an AC motor. Background technique

[0002] A motor drive system is often used that uses an inverter to convert DC voltage to AC voltage to drive a three-phase AC motor. Various control modes for appropriately controlling the torque output from the AC motor to a target torque (torque command value) in such a motor drive system have also been proposed.

[0003] For example, Japanese Patent Application Publication JP-A-2005-124359 describes a method in which, in current feedback for current control of a synchronous motor, the current signal evaluated by an observer with a correction term is used to compare the actual speed with the estimated The error between speeds is co...

Claims

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