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Error frequency component acquisition device, angle of rotation acquisition device, motor control device, and angle of rotation acquisition method

A technology for obtaining the rotation angle and the device, which is applied in the direction of motor control, measuring device, single motor speed/torque control, etc., can solve the problem of resolver installation position error, etc., and achieve the effect of lightening the burden and reducing the error

Inactive Publication Date: 2014-07-09
MITSUBISHI HEAVY IND LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] When using a resolver to detect the rotor rotation angle, errors may occur due to the installation position of the resolver, etc.

Method used

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  • Error frequency component acquisition device, angle of rotation acquisition device, motor control device, and angle of rotation acquisition method
  • Error frequency component acquisition device, angle of rotation acquisition device, motor control device, and angle of rotation acquisition method
  • Error frequency component acquisition device, angle of rotation acquisition device, motor control device, and angle of rotation acquisition method

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Embodiment Construction

[0066] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0067] First, the schematic operation of the motor control device will be described. Motor control devices, for example, are used in industrial vehicles, electric vehicles, hybrid vehicles, electric locomotives, ships, airplanes, power generation systems, etc., to control motors by receiving power from a battery pack.

[0068] In electric vehicles powered by electric motors and hybrid electric vehicles powered by both internal combustion engines and electric motors (hereinafter referred to as 'electric vehicles, etc.'), in order to improve power usage efficiency, the motor control device controls the three-phase drive current When using pulse width modulation control (PWM (Pulse Width Modulation) control) to modulate the pulse width.

[0069] In electric vehicles and the like, a permanent magnet synchronous motor in which a three-phase current synchronous with rotation...

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Abstract

Provided is a device which uses a resolver to detect an angle of rotation of a rotor, with which it is possible to obtain an angle of rotation of a rotor with a small error while reducing load on an adjuster. An angle measured value acquisition unit (210) acquires a motor axle angle of rotation measured value, and an error computation unit (220) computes an error which is included in each of a plurality of angle of rotation measured values. A frequency component acquisition unit (230) derives a phase and amplitude of an error frequency component from a plurality of errors. It is thus possible for an error frequency component acquisition device (121) to automatically compute phase and amplitude of an error frequency component included in an angle of rotation measured value, and to carry out a correction on the angle of rotation measured value using the phase and amplitude. Accordingly, it is possible to obtain an angle of rotation of a rotor with a small error while reducing the load on an adjuster.

Description

technical field [0001] The invention relates to an error frequency component acquisition device, a rotation angle acquisition device, a motor control device and a rotation angle acquisition method. Background technique [0002] As a method of detecting the rotation angle of a rotor (motor shaft) of a motor, a method using a resolver is known. The resolver is a rotation detection device that detects the rotation angle of the rotor based on the phase difference between the rotor coil and the stator coil. For example, a resolver includes: a coil for excitation; a resolver and a rotor that rotate together with a motor shaft; and a coil for detection. Then, when an AC voltage is applied to the excitation coil, a voltage having an amplitude corresponding to the rotation angle of the resolver and the rotor is generated in the detection coil. Based on the amplitude of the voltage generated in this detection coil, the rotor rotation angle (the rotation angle of the resolver and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20G01D5/244H02P29/00
CPCG01D5/208H02P6/06G01D5/2073G01D5/24476H02K11/20G01D5/12G01D18/00
Inventor 加藤义树
Owner MITSUBISHI HEAVY IND LTD
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