speed control of SPIM

Speed Torque Control Of single Phase Induction Motor Using Solid State Converter

General Description For The Project  

The project aims to operate a single phase induction motor (SPIM) as two phase induction motor , with purpose to run the motor at two windings instead of one running winding only . So the team designed and built a two phase solid state converter to drive the motor , where the converter is controlled by pulse width modulated sinusoidal (PWMS) generated by Matlab. It achieves 90 electrical degrees phase shift between the motor two currents . A closed loop control system is designed to control the motor speed. The motor is simulated using MATLAB software. The system is tested experimentally using Matlab and simplorer programs, some experimental results are presented.

Project Significance

The following can be achieved

  • Operating the motor without need of additional mechanical switching components, therefore reducing the mechanical elements in such motors .
  • Operating the motor without need to start and run capacitors.
  • Increasing the starting and the rated torque of the motor with purpose to carry heavy loads at starting.
  • Increasing the motor efficiency through improving the phase shift between the motor windings to be closed at approximately 90 dg time shifting, and reducing the flux harmonics and torque pulsations.
  • The motor speed is controlled to operate in a wide speed range . So it will be significant in the applications operates at variable speed modes.

Applications of (SPIM)   

Because of ruggedness and low price, single-phase induction motors are widely used in several commercial and domestic applications.
Although their performance is inferior when compared to that of poly-phase induction motors, they are still commonly used in small ratings where the three-phase supply is not usually available.

Some Applications   

  • Heating, ventilation, and air conditioning (HVAC) .Which needs variable speed modes to minimize power consumption.
  • Low power industrial plants.
  • Widely used in households.