Frequency Conversion Motor Design And Speed Regulation System Simulation

Frequency conversion motor with power electronic technology, microelectronics technology fast development and rapid development, and a "special inverter induction motor + inverter speed adjustment way" exchange, is in its outstanding performance, reliability and economy in the field in speed, lead a change in the way replacing traditional speed.This topic frequency conversion motor with general asynchronous motor design electromagnetism design as the basis, the "approximate analytical methods", the frequency conversion motor stator design, considering the input voltage variable frequency speed regulation process for the sine wave current much, contains a lot of HHG, therefore, in design process, must reduce stator resistance, to reduce the stator copper loss, to make up for the high frequency hamonic brings stator stray loss, so should be in the design process for stator resistance related motor size, give key consideration. Also consider motor stator and rotor groove cooperates, groove of harmonic magnetic field changes such as magnetic saturation, it must be deepened air gap width relax appropriately, considering the high harmonic magnetic saturation, it will deepen frequency motor main magnetic circuit general design into unsaturated condition, to improve the motor in the low frequency low speed running torque converter, appropriate to improve the output voltage. The design process issues, applied the calculation formula of empirical formulas, and HHG used Fourier discrete mathematics method analysis of motor size parameters, and necessary correction, according to the maximum magnetic flux density meets the requirements, the range of technical scheme again, finally finishing draw a calibration 185kW frequency conversion traction motor design scheme.This topic frequency conversion motor, it is necessary to design temperature after completion of calculation and the ventilation design by considering the input power of a non sinusoidal wave effects, of high times by increasing the inductance after harmonic control the temperature, frequency conversion motor than general asynchronous motor temperature increases 10%-20%, therefore frequency conversion motor by the form of ventilation forced ventilation, temperature of the motor qualitative analysis is done, and select the optimal design of the wind path. Frequency conversion motor design parameters, the exchange after speed system is modeled, and the speed of constant pressure frequency open loop than speed-adjusting system simulation, will integrate simulation curve, and the simulation results are analyzed.