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An accurate discrete active disturbance rejection control method for pmsm at low carrier ratio

A technology of active disturbance rejection control and carrier ratio, applied in the control system, control generator, motor control and other directions, can solve the problems of runaway and low control accuracy, avoid truncation error, reduce burden, improve stability and dynamic performance effect

Active Publication Date: 2022-07-19
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a PMSM accurate discrete ADRC control method under low carrier ratio, which solves the problem of low control accuracy or even out of control of traditional ADRC under high speed and low carrier ratio.

Method used

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  • An accurate discrete active disturbance rejection control method for pmsm at low carrier ratio
  • An accurate discrete active disturbance rejection control method for pmsm at low carrier ratio
  • An accurate discrete active disturbance rejection control method for pmsm at low carrier ratio

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Embodiment Construction

[0077] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0078] A PMSM precise discrete active disturbance rejection control method under low carrier ratio of the present invention, wherein the adopted high-speed low carrier ratio permanent magnet synchronous motor quasi-discrete linear active disturbance rejection control vector system block diagram is as follows: figure 1 shown, follow the steps below:

[0079] Step 1, establish a complex vector permanent magnet synchronous motor model, and obtain an accurate mathematical relationship between current and voltage after accurate discretization, specifically:

[0080] Step 1.1, establish a continuous domain complex vector PMSM model in a rotating coordinate system;

[0081] The complex vector PMSM model is specifically as follows:

[0082]

[0083] In formula (1), u d , u q , i d , i q are the d-q axis voltage and d-q axis current in the two-...

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Abstract

The invention discloses an accurate discrete active disturbance rejection control method for PMSM under low carrier ratio, which specifically includes the following steps: Step 1, establishing a complex vector permanent magnet synchronous motor model, and obtaining accurate mathematical relationship between current and voltage after accurate discretization In step 2, a discrete linear ADRC with disturbance compensation is designed according to the precise discrete domain complex vector PMSM model, and digital delay compensation is performed on the ADRC; in step 3, the full speed is guaranteed according to the pole configuration design Discrete-domain extended state observer feedback gain matrix for stable operation in range. The present invention solves the problems of low control precision or even out of control in the traditional active disturbance rejection control under the current high speed and low carrier ratio.

Description

technical field [0001] The invention belongs to the technical field of high-performance permanent magnet synchronous motor control, and relates to a PMSM precise discrete active disturbance rejection control method under low carrier ratio. Background technique [0002] Permanent Magnet Synchronous Motor (PMSM) has been widely used in many transmission fields such as rail transit, industrial control, and household appliances because of its high efficiency, high power density, and easy field-weakening speed expansion. In high-power traction drive systems, in order to reduce the switching loss of power devices, the switching frequency of the inverter is only a few hundred Hz; in ultra-high-speed and multi-pole logarithmic motor control systems, the operating frequency can reach more than 500 Hz. Under the above conditions, the inverter switching frequency (f PWM ) and the motor operating frequency (f e ) ratio (carrier ratio f ratio =f PWM / f e ) is very low, sometimes eve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/34H02P21/13H02P21/22H02P25/026H02P27/08
CPCH02P6/34H02P21/13H02P21/22H02P25/026H02P27/08H02P2207/05
Inventor 尹忠刚黄文博张彦平原东昇
Owner XIAN UNIV OF TECH
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