The Current Source Inverter technology is well suited for medium voltage induction motor drives. Because the CSI drive generally features simple converter structure, motor friendly waveforms, inherent four-quadrant operation capability and reliable fuse less short circuit protection. The main draw back lies in its dynamic torque response. An improved Direct Torque Control method is proposed her...

This paper proposes a novel sliding mode (SM) disturbance observer-based technique to diagnose demagnetization fault of interior permanent magnet (IPM) motors with stator parameter mismatch impacts eliminated. First, the IPM motor model incorporating disturbances caused by PM and is established. Then, an SM observer constructed identify overall all parameters, its stability discussed using Lyap...

This paper proposes a nonlinear flux linkage observer for the PMSM speed controls without motion sensors, introducing deviation among real stator and an estimated to suppress feedback integral drift. In position detection of interior sensor, traditional back EMF integration method uses pure integrator, or LPF, estimate flux. Its inherent defects inevitably lead inaccurate estimation, which dire...

A novel hybrid state space modeling approach for a dual armature generator is presented. The model uses finite element analysis to obtain the rotor angle-dependent parameters, namely flux linkage, stator inductances and cogging torque, which are then incorporated into dynamic equations of using Fourier representations physical parameters as function angle. proposed addresses many limitations cl...