A Predictive Control Method for Reducing emi of Inverter Induction Motor
An induction motor, predictive control technology, applied in the direction of AC motor control, motor parameter estimation/correction, control system, etc., can solve the problems of unsuitable high voltage and high current systems, increase cost and volume, etc. The effect of hardware size and cost, reduction of electromagnetic interference, and good output characteristics
Active Publication Date: 2020-05-22
XI AN JIAOTONG UNIV
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[0004] The passive filter, active filter, improved circuit structure and other methods involved in the above patents are common and effective methods to reduce EMI at present, but these methods require additional cost and volume, and are not suitable for high voltage and large current system
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[0053] The present invention will be further explained below in conjunction with specific embodiments and accompanying drawings.
[0054] see figure 1 control system structure and Figure 6 The method flow process of the present invention specifically comprises the following steps:
[0055] 1) First input the reference speed ω * , Input rated torque T n and stator flux reference value Then detect the motor output speed ω, and the input reference speed ω * Comparing to obtain the speed error signal e, the PI controller receives the error signal e, and calculates the reference torque T * ;
[0056] Among them, the PI controller is a discrete anti-integral windup speed controller, such as figure 2 As shown, the proportional gain k in the PI controller p and integral gain k i As an adjustable parameter, it can be designed according to the conventional tuning method of PI controller parameters. The output of the PI controller includes a saturation block (Saturation), whi...
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The invention discloses a predictive control algorithm for reducing EMI of an inverter induction motor. The predictive control algorithm aims to reduce electromagnetic interference of the inverter induction motor system, prevent system hardware size increase and cost increase and realize a good output characteristic. The algorithm comprises the steps of firstly inputting a reference rotating speed, a rated torque and a stator magnetic chain reference value; detecting a motor output rotating speed, performing comparison with the reference rotating speed for obtaining a rotating speed error signal, receiving a rotating speed error signal by a PI controller and calculating a reference torque; then calculating estimated values of a stator magnetic flux and a rotor flux; then calculating a torque, a stator flux and an EMI predicated value; and finally through calculating a cost function at each switching state in a sampling period, and outputting the switching state which minimizes a cost function to a three-phase inverter, and driving an induction motor to operate by the three-phase inverter, thereby finishing prediction control to the EMI.
Description
technical field [0001] The invention belongs to the research field of power electronic electromagnetic interference, and in particular relates to a predictive control algorithm for reducing the EMI of an inverter induction motor. Background technique [0002] With the development of high frequency, miniaturization and integration of power electronic equipment, the phenomenon of electromagnetic interference (EMI, Electromagnetic Interference) inside the device is becoming more and more serious. Electromagnetic Compatibility (EMC, Electromagnetic Compatibility) of electronic and electrical equipment is a very important quality index. It is not only related to the normal operation of the equipment, but also related to the protection of the electromagnetic environment. For this reason, the national 3C certification mandates that equipment Electromagnetic compatibility is required for verification. EMC includes EMI and EMS (Electromagnetic Immunity, Electromagnetic Susceptibilit...
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IPC IPC(8): H02P23/14H02P27/06
CPCH02P23/14H02P27/06
Inventor 陈希亮陈文洁沙意林祁鹤媛赵子峰
Owner XI AN JIAOTONG UNIV