Built-in permanent magnet synchronous motor direct torque control energy saving frequency converter and construction method thereof

Abstract

The invention relates to a built-in permanent magnet synchronous motor direct torque control energy saving frequency converter. The built-in permanent magnet synchronous motor direct torque control energy saving frequency converter includes a permanent magnet synchronous motor energy saving frequency-variable controller and a permanent magnet synchronous motor power converter, and can realize highefficiency and quick response control of the built-in permanent magnet synchronous motor, by establishing a built-in permanent magnet synchronous motor equivalent circuit model considering iron coreloss under a rotor field orientation coordinate system, providing a stator linkage calculating method with higher operating efficiency and lower power consumption when the motor output torque and therotating speed are constant, constructing an optimal stator linkage calculating module, putting the optimal stator linkage calculating module into a direct torque control drive system. The built-in permanent magnet synchronous motor direct torque control energy saving frequency converter has the advantages of 1) obviously reducing power consumption of light load operation of the motor, improving the comprehensive performance of the motor drive system in the total speed regulation scope, being simple in structure, being reliable in operation, and being low in cost; and 2) being suitable for a permanent magnet synchronous motor driving application occasion which is often in a light load operation state or in which the load is changed frequently.

Description

Technical field [0001] The invention is a built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter and a construction method, which belong to the technical field of electric drive control equipment. Background technique [0002] The built-in permanent magnet synchronous motor (IPMSM) has the advantages of high power density, high power factor, low loss, low operating noise and reliable operation, and is widely used in high-performance motor speed control systems. For high-performance motor speed control systems, the operating efficiency of the motor is an important performance index. In order to improve the operating efficiency of the motor, in addition to the optimized design of the motor body, the use of efficiency optimization control technology is an effective method to improve the operating efficiency of the motor for different operating conditions of the motor. Permanent magnet synchronous motors have higher efficiency when operat...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes an energy-saving frequency converter and a construction method of a built-in permanent magnet synchronous motor direct torque control drive system. By constructing the optimal stator flux calculation module and putting it into the direct torque control drive system, the operating efficiency and control response speed of the built-in permanent magnet synchronous motor can be improved

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