Research On Machine Speed Regulation Based On Space-Vector Modulation Active Inverter Technique

At present, in exchanging the asynchronous electrical machinery energy-efficient and adjusting the speed, according to different uses, motors mainly adjust speed or each and adjust speed technology with frequency conversion . Frequency conversion technology control stator side of electrical machinery supply power , exchange device will bear high pressure very to want, control the power of the electrical machinery. And speed of adjusting of each control the rotor side of the electrical machinery. Turn the device into and flow only bears the return circuit low-voltage of the rotor , control very small rotor to transfer to the difference rate. The speed of adjusting of each is that very classical electrical machinery adjusts the speed method, has done exhaustive exposition too in this text in its principle. In view of this, it is active invert turning into in the electrical machinery adjusting the application in the speed that this text has been designed on the basis of SVPWM technology.Firstly, the thesis analyzes the working principles of traditional flux sinusoidal PWM control technique in detail. And the modulation wave functions are deduced. The digital simulation is done by computer to verify. Followling the thesis draw comparisons between voltage type PWM rectifier and current rectifier and finally select voltage type PWM rectifier as the main circuit of the system . Detailed analysis of the whole system that this text provides and goes against active invert and driving and protecting the circuit; Provide and make use of digital signal processor to realize the method that SVPWM controls finally.