Permanent magnet synchronous motor position sensorless control method

A technology of permanent magnet synchronous motor and control method, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem that the motor cannot be guaranteed to run synchronously and stably, the dynamic response speed is not high, and enough attention is generated. problems, to achieve the effect of less hardware implementation requirements, less computation, and less dependencies

Inactive Publication Date: 2015-10-07
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

2) Scalar control, including conventional V / f control, V / f control with a stable correction loop, etc. This type of control strategy is relatively simple to implement and has strong robustness, but the dynamic response speed is not high
Due to the difficulty and cost of design and manufacture, most of the existing permanent magnet synchronous motor rotors are not equipped with damping windings, so the traditional open-loop V / f control strategy cannot guarantee the synchronous and stable operation of the motor
In addition, for applications such as fans, water pumps, and compressors, the efficiency and output capacity of the drive system are a major concern. In the past, most researches on the sensorless control of permanent magnet synchronous motors have not paid enough attention to it. It is of great significance to study the effect of similar current vector control on V / f control based on position sensorless technology

Method used

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  • Permanent magnet synchronous motor position sensorless control method
  • Permanent magnet synchronous motor position sensorless control method
  • Permanent magnet synchronous motor position sensorless control method

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Embodiment Construction

[0037]In order to make the control structure, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] figure 1 Shown is the principle block diagram of the control method of the present invention, which specifically includes: electric angular velocity command acceleration and deceleration link, calculation of rotor back EMF proportional link, voltage limiting link, electrical angular velocity integral link, polar coordinate system / two-phase stationary αβ coordinate System transformation, SVPWM modulation, three-phase inverter power supply, permanent magnet synchronous motor, current sensor, three-phase stationary ABC coordinate system / two-phase stationary αβ coordinate system transformation (Clark transformation), power calculation link in two-phase stationary αβ coordinate system, High-pass filter, speed stabilization proportional regulator, (M...

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Abstract

The invention discloses a permanent magnet synchronous motor position sensorless control method, comprising a rotating speed stabilization ring for correcting voltage synthesizing vector speed and a voltage amplitude correction ring for realizing vector control. The permanent magnet synchronous motor position sensorless control method essentially solves the problem that the motor is easy to lose synchronization and collapse, brings forwards a novel control strategy algorithm for realizing vector control, and realizes the stable, reliable and efficient operation of the driving system of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to a position sensorless control method of a permanent magnet synchronous motor, which belongs to the field of motor control. Background technique [0002] The increasing energy consumption requires the application of more efficient control systems in industrial equipment. Power electronics and control technology can effectively improve the efficiency of most current industrial drive systems. Due to its high efficiency, high power density, high dynamic response and other advantages, the permanent magnet synchronous motor has been valued by the industry, so it has gradually been widely used in industrial equipment. For some devices that need to run continuously for a long time, such as fans, pumps, and compressors, if the efficiency can be improved, it will save huge energy. Applying permanent magnet synchronous motors to these occasions can significantly improve energy utilization and save energy. [0003] The control methods of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
Inventor 杨凯杨星星谢鸿钦罗成王晓光
Owner HUAZHONG UNIV OF SCI & TECH
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