A high-voltage inverter speed sensorless vector control system
A speed sensorless, high-voltage frequency converter technology, applied in vector control systems, control systems, control generators, etc., can solve the problems of insufficient stability and large amount of calculation, and achieve high stability, low amount of calculation, and low system cost. cost effect
Active Publication Date: 2021-05-11
中冶赛迪电气技术有限公司
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Problems solved by technology
Most of these methods are based on the ideal motor model, which depend on the motor parameters and operating status to varying degrees, and all of them have the problems of large amount of calculation and insufficient stability.
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[0035] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.
[0036] Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be ...
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The invention relates to a speed sensorless vector control system of a high-voltage frequency converter, which belongs to the field of power electronic control. The system includes a Clark transformation module, a Park transformation module, a back EMF calculation module induced by the rotor flux linkage on the stator side, an electromotive force correction module, a speed regulation module, a DC current regulation module, a current model module, an inverse Park transformation module, and an inverse Clark transformation module , High voltage inverter and motor. Output Δω through the proportional-integral regulator through the excitation electromotive force component r , and add it to the given angular velocity to get the actual value of the angular velocity. The invention does not need to install a speed measuring encoder, and is suitable for occasions that have certain requirements on speed regulation, that is, do not work at low speed for a long time, and are not suitable for installing an encoder.
Description
technical field [0001] The invention belongs to the field of power electronic control, and relates to a speed sensorless vector control system with a high-voltage frequency converter and an asynchronous motor, which is suitable for occasions with high requirements for medium and high speed speed regulation. Background technique [0002] In the vector control of the asynchronous motor, the speed of the motor needs to be known. The traditional way of installing encoder speed measurement increases the cost of the system, and it is not easy to install in some occasions. Sensorless vector control has many advantages over encoder-based control. Since there is no need to install an encoder, the cost of the system is reduced, the anti-interference and reliability of the system are improved, the axial size of the motor is reduced, and the advantages of the asynchronous motor with simple structure and strong mechanical structure are maintained. [0003] The speed closed loop without...
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IPC IPC(8): H02P21/18H02P21/26
CPCH02P21/18H02P21/26
Inventor 姜廷阳杨美霞干永革郝亚川傅永伟
Owner 中冶赛迪电气技术有限公司