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Method for compensating time delay during controlling whole digital AC motor and control device thereof

A technology of AC motors and control devices, which is applied in the direction of motor generator control, electromechanical transmission control, electronic commutation motor control, etc., and can solve problems such as motor loss of control, poor dynamic performance, and unstable current regulator.

Active Publication Date: 2009-01-21
CHERY AUTOMOBILE CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

At present, in the existing AC motor control, more consideration is given to PWM dead-time compensation technology, and digital time delay compensation is not involved. There will be dynamic performance in some controls that require high motor control performance or high-speed operation requirements. Poor and unstable current regulator problems, which will cause the motor to lose control in severe cases, so it is necessary to effectively compensate for the digital time delay

Method used

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  • Method for compensating time delay during controlling whole digital AC motor and control device thereof
  • Method for compensating time delay during controlling whole digital AC motor and control device thereof
  • Method for compensating time delay during controlling whole digital AC motor and control device thereof

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Embodiment Construction

[0029] Such as figure 2 Shown is a kind of all-digital AC motor control device with the time delay compensation module 9 of the method of the present invention, and realizes the phase compensation of following operation in the time delay compensation module:

[0030] θ 2 * = θ 1 + Δθ

[0031] Δθ=1.5ωeTs

[0032] In the formula: θ' 2 is the output after compensation, θ 1 is the position angle of the motor rotor at a certain moment, Δθ is the compensation phase angle, T s is the sampling period of the current regulator, ω e =pω, p is the pole number of the motor, ω is the angular velocity of the motor, and the delay period is regarded as a constant.

[0033] The algorithm and functional modules of the all-digital AC motor control device include a current regulator 1, a synchronous / fixed coordinate converter 2, a three-phase voltage generator 3, a two-...

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Abstract

The present invention discloses a time delay compensation method in the full-digital AC motor control and a full-digital AC motor control device. In the technical proposal, the delay compensation method ignores the influence of amplitude error and only compensates the phase error. A functional module is added into the full-digital AC motor control device in the prior art for time delay compensation so as to implement the method. The method adopts a quite simple algorithm, and overcomes the problems of poor dynamic performance and instability of the current regulator in the control which requires high controlling performance of the motor or high-speed operation.

Description

technical field [0001] The invention relates to a control method and device for an AC motor in a hybrid electric vehicle, in particular to an all-digital AC motor control device for time delay compensation and a time delay compensation method. Background technique [0002] In hybrid electric vehicle AC motor control, all digital processing including current regulation loop and PWM block is executed in the digital domain, and the motor controller based on DSP chip processes the obtained digital information and controls the motor through D / A conversion Work. The patent "synchronous motor control device" with application number CN03820553.X and the patent "permanent magnet synchronous motor control device" with application number CN200480042526.0 both disclose a figure 1 Similar to the motor control device, the device is completed by DSP simulation. In this device, the current regulator 1 receives the motor angular velocity ω and the feedback signal i of the motor input curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18H02P21/14H02P21/18
Inventor 谢美娟
Owner CHERY AUTOMOBILE CO LTD
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