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

A synchronous motor and excitation coil technology, used in hybrid vehicles, motor generator control, AC motor control, etc., can solve problems such as torque ripple, magnetic flux φ ripple, etc., to reduce torque ripple and stabilize output torque. Effect

Inactive Publication Date: 2010-06-09
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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Below, use Figure 1 to Figure 7 Next, 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.

[0046] Initially, using figure 1 Next, 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.

[0047] figure 1 It 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.

[0048] 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...

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PUM

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Abstract

A controller of a field winding type synchronous motor which can output torque stably even if the d-axis current pulsates by reducing torque pulsation without causing variations in the flux acting onthe torque. An electric drive system, an electric four wheel driving vehicle and a hybrid automobile are also provided. A motor control unit (100) controls the field winding (22f) such that a desiredtorque is generated from a field winding type motor (20) having a rotor. Based on a current Id flowing in the d-axis direction out of the currents flowing through the stator winding (22a) of the fieldwinding type motor (20), the motor control unit (100) operates an induced voltage Vf2 being induced in the field winding (22f) and compensates the field voltage Vf of the field winding based on the induced voltage Vf2 thus suppressing pulsation of the field current flowing through 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 Patents(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