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Torque feedforward control method and control device for dual pwm permanent magnet electric drive system

A technology of electric drive and feedforward control, which is applied in motor control, motor generator control, AC motor control, etc., can solve problems such as slow torque response, high system cost, and complex energy management, and achieve fast response, The effect of convenient system maintenance and simple structure

Active Publication Date: 2019-05-24
HUNAN UNIV
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Problems solved by technology

[0004] The present invention provides a dual PWM permanent magnet electric drive system torque feedforward control method and its control device with fast torque response speed, low system cost and convenient energy management, so as to solve the problem of the existing dual PWM electric drive system in the vehicle system Existing technical problems of slow torque response, high system cost and complex energy management

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  • Torque feedforward control method and control device for dual pwm permanent magnet electric drive system
  • Torque feedforward control method and control device for dual pwm permanent magnet electric drive system
  • Torque feedforward control method and control device for dual pwm permanent magnet electric drive system

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Embodiment Construction

[0035] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] see figure 1 As shown, the present invention provides a dual PWM permanent magnet electric drive system torque feedforward control device, which includes a control circuit, a generator, a rectifier circuit, a DC bus, an inverter circuit and a motor, a generator, a rectifier circuit, a DC The bus bar, the inverter circuit and the motor are electrically connected in sequence, and the control circuit includes a generator controller connected with the rectifier circuit and a motor controller connected with the inverter circuit.

[0037] Wherein, the output end of the generator of the present invention is equipped with a generator encoder for obtaining the rotational sp...

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Abstract

The present invention provides a torque feedforward control method of a double-PWM permanent magnet electric driving system. According to the control method and control device, the load torque of a motor is converted into given torque current corresponding to the output torque of a generator, so that the output power of the generator can be rapidly changed, and therefore, the load torque response time of the motor can be shortened. According to a traditional double-PWM permanent magnet electric driving system, when the load torque of the motor changes, corresponding adjustment information is provided only after the voltage of a direct-current bus-bar changes, so that the output power of the generator is adjusted, and as a result the problem of the long load torque response time of the motor is brought about, while, with the torque feedforward control method and control device adopted, the problem can be solved. The invention also provides a torque feedforward control device of the double-PWM permanent magnet electric driving system. According to the control device, a torque observer and a torque current converter connected with the torque observer are only required to be additionally arranged between the motor and generator of the existing system, so that torque feedforward can be realized. The control device has the advantages of simple structure, convenient maintenance of the system and high response speed and convenience in use and generalization.

Description

technical field [0001] The present invention relates to the technical field of motor control, and more specifically, to a torque feedforward control method and a control device for a dual PWM permanent magnet electric drive system. Background technique [0002] In power conversion devices, the PWM method has been widely used as a control method to obtain a desired output voltage. The PWM method is a method of conducting a switching element at a conduction interval or conduction duration proportional to a voltage command. In Such methods are well known in the prior art as the carrier comparison method or the space vector method. [0003] In recent years, with the rapid development of vehicle technology, dual PWM permanent magnet electric drive systems have been widely used in vehicle drive systems due to their high input power factor, bidirectional flow of electric energy, and environmental protection. However, the vehicle system needs to perform operations such as accelerat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/13H02P25/022
CPCH02P21/13H02P2101/45H02P2103/20H02P2207/05
Inventor 张文娟高剑黄守道李雪萍荣飞罗德荣
Owner HUNAN UNIV
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