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A current loop control method for full speed range of permanent magnet synchronous motor

A permanent magnet synchronous motor, speed range technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem that the current loop single PI regulator cannot meet the dq loop current rapidity and stability tracking at the same time and other problems, to achieve the effect of improving control stability, fast calculation speed and simple calculation

Active Publication Date: 2020-09-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a current loop control method for the full speed range of the permanent magnet synchronous motor, and solve the problem that the existing single PI regulator of the current loop cannot simultaneously satisfy the rapidity and stability tracking of the actual current of the dq loop The problem

Method used

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  • A current loop control method for full speed range of permanent magnet synchronous motor
  • A current loop control method for full speed range of permanent magnet synchronous motor
  • A current loop control method for full speed range of permanent magnet synchronous motor

Examples

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Embodiment

[0052] figure 1 It is a flow chart of the current loop control method for the full speed range of the permanent magnet synchronous motor of the present invention.

[0053] In this embodiment, the motor is a permanent magnet synchronous motor with a peak torque of 150Nm, a peak power of 60kW, a rated speed of 3000rpm, a peak speed of 8000rpm, and a stator resistance of R s 0.025Ω, L q , L d They are 0.914mH and 0.316mH respectively.

[0054] Such as figure 1 As shown, a current loop control method of a permanent magnet synchronous motor in the full speed range of the present invention comprises the following steps:

[0055] S1. Divide the full speed range of the motor into 0~ω 1 , ω 1 ~ ω 2 and ω 2 ~ ω max Three speed ranges;

[0056] In this example, if figure 1 As shown, take the speed segment point ω 1 The rated speed is 3000rpm, ω 2 3500rpm, ω max The peak speed is 8000rpm;

[0057] S2, designing the proportional coefficient and the integral coefficient of the ...

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Abstract

The invention discloses a current loop control method for the full speed range of a permanent magnet synchronous motor. Firstly, according to the rated parameters of the motor, the full speed range of the motor is divided into three speed ranges, and then the proportional coefficient and the integral coefficient of the dq loop current regulator are designed , and finally use the resolver to collect the real-time speed ω of the motor, and then control the motor in stages according to the speed range of the speed ω. Stability tracking issues.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and more specifically relates to a current loop control method for the full speed range of a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor mostly adopts a double closed-loop vector control algorithm that combines the speed loop and the current loop. The principle of vector control is to control the permanent magnet synchronous motor equivalent to a DC motor through coordinate transformation. The current loop is the innermost loop of vector control. Foundation. At present, most of the current loop regulators are single PI regulators. However, the motor has different control requirements for the current loop under different speed conditions. When the motor is running below the rated speed, it is required that the current can be tracked in a steady state without error, and it is required to run above the ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/00
CPCH02P21/0003H02P21/22
Inventor 辛晓帅郑延兵颉宏宇邹见效徐红兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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