A field-weakening control method for induction motors based on optimized six-beat operation

A technology for field-weakening control and induction motors, applied in motor generator control, AC motor control, electronically commutated motor control, etc., can solve problems such as reducing current loop bandwidth, increasing harmonics, and deteriorating system performance. Achieve the effect of increasing the maximum torque and ensuring the dynamic performance

Active Publication Date: 2022-04-15
HARBIN INST OF TECH +1
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Problems solved by technology

[0007] In order to solve the problem that the nonlinear expansion of the stator voltage of the motor causes the increase of harmonics and the deterioration of the system performance, and at the same time aims at the problem that the traditional filter will reduce the bandwidth of the current loop, a method based on optimized six-beat operation is proposed. Induction Motor Field Weakening Control Method

Method used

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  • A field-weakening control method for induction motors based on optimized six-beat operation
  • A field-weakening control method for induction motors based on optimized six-beat operation
  • A field-weakening control method for induction motors based on optimized six-beat operation

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Embodiment 1

[0039] The schemes in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other examples obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The present invention is based on the traditional field-weakening control strategy based on voltage closed-loop, and the following first combines figure 1 The voltage closed-loop field weakening control strategy is described:

[0041] In the voltage closed-loop field weakening control strategy, the operating range of the induction motor can be divided into three areas: constant torque area, constant power area (field weakening area 1), and constant voltage area (field ...

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Abstract

The invention provides a field-weakening control method for an induction motor based on optimized six-beat operation, which belongs to the technical field of motor control. The control method first sets the voltage reference value in the field weakening controller to 2U dc / π to ensure that the system can reach the six-beat operation mode, and set the frequency of the feedback current resonant filter to ω * c with 6·ω s The larger value between; when the speed exceeds the rated speed, the motor enters the field weakening area, the inverter will output a six-beat voltage, and the six-beat voltage will cause the generation of the sixth harmonic of the current, and the feedback current with the sixth harmonic will pass through After the resonant filter makes a difference with the given value, it enters the complex vector current regulator. The current regulator generates a given voltage, and the inverter trigger pulse is generated by the SVPWM modulation strategy to control the motor to run in the field weakening area. The invention is applied to the field weakening control of the six-beat operation of the induction motor.

Description

technical field [0001] The invention relates to a field-weakening control method of an induction motor based on optimized six-beat operation, and belongs to the technical field of motor control. Background technique [0002] With the wide application and continuous development of vector control in the field of AC motor speed control systems, AC motors have been significantly improved in terms of drive capability, dynamic response, speed range and accuracy, and therefore gradually replaced DC speed control systems. It is used in various industrial applications including household appliances, elevator traction, automotive machine tools, etc. At the same time, especially in high-performance industrial control applications, such as electric vehicles, CNC machine tool spindle drives, and electric locomotives, the requirements for high precision, high efficiency, and high quality have prompted the development of motor-driven variable frequency speed control systems in the directio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/22H02P21/20H02P27/08H02P25/02
CPCH02P21/0089H02P21/14H02P21/22H02P21/20H02P27/085
Inventor 于泳张旭王勃张静徐殿国
Owner HARBIN INST OF TECH
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