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AC motor control device and electric vehicle

A technology of AC motors and control devices, which is applied in the direction of AC motor control, AC induction motor traction, motor generator control, etc., and can solve problems such as complicated processing

Inactive Publication Date: 2011-12-14
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the process for determining whether switching of the control mode is necessary may become complicated.

Method used

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  • AC motor control device and electric vehicle
  • AC motor control device and electric vehicle
  • AC motor control device and electric vehicle

Examples

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Embodiment Construction

[0092] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the same reference numerals are attached to the same or corresponding parts in the following drawings, and the description thereof will not be repeated.

[0093] (Overall structure of motor control)

[0094] figure 1 It is an overall configuration diagram of a motor drive control system to which the AC motor control device according to the embodiment of the present invention is applied.

[0095] refer to figure 1 , The motor drive control system 100 includes a DC voltage generator 10#, a smoothing capacitor C0 , an inverter 14 , an AC motor M1 , a current sensor 24 , and a control device 30 . The AC motor control device according to the embodiment of the present invention includes at least a current sensor 24 and a control device 30 .

[0096] The AC motor M1 is, for example, a drive motor for generating torque for driving drive wheel...

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PUM

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Abstract

An AC electric motor (M1), an inverter (14) and a controller (30) are mounted on an electric powered vehicle. The controller (30) includes a voltage deviation calculating unit (320), a modulation factor calculating unit (340), and a mode switching determination unit (360). The voltage deviation calculating unit (320) calculates a voltage deviation between a first voltage command when the rectangular wave voltage control is executed and a second voltage command when pulse width modulation control is executed, by inputting a current deviation to a voltage equation of the AC electric motor. Modulation factor calculating unit (340) calculates the modulation factor based on the first voltage command and the voltage deviation. The mode switching determination unit (360) determines whether or not control mode of the AC electric motor (M1) from the rectangular wave voltage control to the pulse width modulation control is necessary, based on the modulation factor.

Description

technical field [0001] The present invention relates to a control device for an AC motor and a vehicle, and more particularly to a control device for an AC motor that switches control modes of the AC motor based on a modulation factor, and an electric vehicle equipped with the control device and the AC motor. Background technique [0002] In order to drive and control an AC motor using a DC power supply, a driving method using an inverter is adopted. The inverter performs switching control through a drive circuit. As the control of the inverter, there are, for example, PWM (Pulse Width Modulation: Pulse Width Modulation) control, rectangular wave voltage control (also referred to as rectangular wave control), and the like. [0003] For example, Japanese Unexamined Patent Publication No. 2007-306699 (Patent Document 1) discloses a motor drive system capable of switching between PWM control and rectangular wave control. This motor drive system includes a control circuit that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P27/04B60L9/18H02P23/07H02P25/022H02P25/026H02P27/08
CPCH02P27/085B60L11/1803H02P21/0035H02M2007/53876Y02T10/70H02P21/0003Y02T10/7005Y02T10/643H02P21/22B60L50/51Y02T10/64H02M7/53876
Inventor 山田坚滋山川隼史大野敏和黑松丰
Owner TOYOTA JIDOSHA KK
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