| Popis: |
This paper presents a significant improvement in the dynamic performance and control of an isolated slip-ring induction motor (SRIM). The stator windings of this SRIM-based wound rotor motor are connected to a fixed dc voltage PV system through a boost converter (BC) and a two-level three-phase voltage source inverter (VSI). Thus, SRIM is modulated and controlled using a nonlinear ramp bang-bang current-mode technique (RBBCM) with PWM a modulated inverter VSI. Using Simplorer 7, and MATLAB, the experimental and simulation results are investigated and compared between these techniques. The results show the following: the improvement, which can be seen by modulating the fixed frequency and waveform achieved by the inverter; The phase shift between the main component of the load phase voltage and current is almost zero; In addition, the variable hysteresis modulation successfully cancels noise and disturbances while also mitigating both higher and lower-order harmonics. The experimental results are investigated and compared with respect to total harmonic distortion, transient response of SRIM speed and developed torque, and other factors that may affect the SRIM performance. |
