Jianming Yao ECE734 Project Fall 2000

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Presentation transcript:

Jianming Yao ECE734 Project Fall 2000 Single Phase Induction Motor Adjustable Speed Control Using DSP and Micro-Controller Jianming Yao ECE734 Project Fall 2000

Requirements for Single Phase Induction Motor Drives Voltage ratio Vaux/Vmain is approximately equal to the effective turns ratio , Naux/Nmain Current ratio is Iaux/Imain=1/ Vaux leads Vmain by 90º at rated frequency Constant V/Hz for adjustable speed drive

Topology and Control Signals

Pulse Width Modulation (PWM) PWM is used to generate sinusoidal power output

PWM & Dead Time Generation

DSP Approach

Programming with TMS320F240

Micro-Controller Approach Testing points PWM for a & b PIC17C756 PWM for c Speed control

Programming with PIC17C756

Hardware implementation AC~ 2 3 12 Control signals or Microcontroller DSP

Experimental Results Motor currents PWM signals for IGBT 1A/div, 5ms/div PWM signals for IGBT 10V/div, 0.1ms/div