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Controller of field winding type synchronous motor, electric drive system, electric four wheel driving vehicle, and hybrid automobile

A technology for synchronous motors and excitation coils, applied in hybrid vehicles, motor generator control, AC motor control, etc., can solve problems such as torque pulsation and magnetic flux φ pulsation, and achieve the goal of reducing torque pulsation and stabilizing output torque Effect

Inactive Publication Date: 2008-06-04
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fluctuation of the field current If, the magnetic flux φ fluctuates, resulting in the problem of torque ripple.

Method used

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  • Controller of field winding type synchronous motor, electric drive system, electric four wheel driving vehicle, and hybrid automobile
  • Controller of field winding type synchronous motor, electric drive system, electric four wheel driving vehicle, and hybrid automobile
  • Controller of field winding type synchronous motor, electric drive system, electric four wheel driving vehicle, and hybrid automobile

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Embodiment Construction

[0047] Hereinafter, the configuration and operation of a control device for a field coil type synchronous motor according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7 .

[0048] First, the configuration of an electric four-wheel drive vehicle equipped with a control device for a field coil type synchronous motor according to this embodiment will be described using FIG. 1 .

[0049] 1 is a block diagram showing the configuration of an electric four-wheel drive vehicle equipped with a control device for a field coil type synchronous motor according to an embodiment of the present invention.

[0050] In the electric four-wheel drive vehicle, the engine 10 drives the front wheels FW, and the field coil type synchronous motor 20 drives the rear wheels RW. The rotational speed of the engine 10 is controlled by an engine control unit (ECU) 30 . A generator 12 dedicated to generating high-voltage direct current is driven by the engine 10 . ...

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Abstract

An object of the present invention is to provide a controller of a field winding type synchronous motor that can stably output torque even if the d-axis current pulsates by reducing torque pulsation without causing fluctuations in the magnetic flux acting on the torque, and also provide an electric drive system, an electric four wheel driving vehicle, and a hybrid automobile. A motor control unit 100 performs control so that a desired torque be generated from a field winding type motor 20 having a field winding 22f on the rotor. Based on a current Id flowing in the d-axis direction out of the currents flowing in a stator winding 22a of the field winding type motor 20, the motor control unit 100 calculates an induced voltage Vf2 being induced in the field winding 22f and compensates a field voltage Vf of the field winding based on the induced voltage Vf2, thus suppressing pulsation of the field current flowing in the field winding of the field winding type motor 20.

Description

technical field [0001] The present invention relates to a control device, an electric drive system, an electric four-wheel-drive vehicle, and a hybrid vehicle for generating a magnetic flux by controlling the flow of current in the field coil and generating torque based on the field coil synchronous motor. Background technique [0002] Recently, the number of automobiles running using electric motors as a driving source has increased. These are environment-friendly vehicles represented by electric vehicles or hybrid vehicles. Also, an electric four-wheel-drive vehicle, in which the front wheels are directly driven by an electric motor and the rear wheels are driven by an electric motor, has become widespread at the same time as the environment-friendly automobile. These drive motors for electric vehicles are used as the mainstream of synchronous motors due to their small size and high efficiency. There are several types of synchronous motors. There are embedded permanent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P27/04B60L11/14B60K6/20B60K6/44B60K6/46B60K6/485B60K6/52B60K6/54B60L50/16H02P6/06H02P6/08H02P6/17H02P6/28H02P21/05H02P21/12H02P21/22H02P23/04H02P27/08
CPCY02T10/643H02P21/0089B60L15/20B60L11/12H02P9/36B60W20/00Y02T10/70B60L2260/28B60K6/52B60L11/14Y02T10/623B60K6/44Y02T10/7077Y02T10/642Y02T10/6265B60K6/26B60L15/025B60W10/08H02P21/05B60L2220/14B60L50/16Y02T10/62Y02T10/64Y02T10/7072Y02T10/72
Inventor 金子悟胜滨健太赤石茂茂木一也山本立行
Owner HITACHI LTD
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