Project 1



CASE 1 Synchronous frame Simulation Results :
dq winding voltages

dq winding currents

electromagnetic torque, load torque and rotor speed



observations :
1.For 4 pole and 60Hz synchronous speed is 120f/p = 1800 rpm (188 mechanical radians per seconds). After multiplying with number of pole pairs synchronous speed in electrical radians per second is 376 radians per second.
2. After 0.7 seconds load torque is added. so upto 0.7 seconds motor is under no load . speed reaches near to synchronous speed 376 rad/sec ( no load speed) at 0.5 seconds due to inertia.
3.After 0.7 seconds when load torque is added speed reduces to zero due to electromagnetic torque produced by motor is less than load torque.
4. dq winding voltages and currents are dc quantities.
CASE 2 Stationary reference frame Simulation results :
dq winding voltages

dq winding currents

electromagnetic torque, load torque and motor speed

observations :
1. dq winding voltages and currents are oscillating with synchronous frequency that is 60Hz (60 cycles per second)
CASE 3 Rotor reference frame Simulation results
dq winding voltages

dq winding currents

electromagnetic torque , load torque and motor speed

observations :
1. dq winding voltages and currents are oscillating with slip frequency.
CASE 4 Rotor flux reference frame simulation results :
dq winding voltages
dq winding currents

electromagnetic torque , load torque and motor speed
