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To solve the problems of complex operation and poor real-time in the traditional SVPWM control algorithm, a novel SVPWM equivalent algorithm based on carrier modulation for five-phase inverter is proposed. Coming from the idea of SPWM symmetrical and regular sampling in which the modulated wave compares with the carrier, the inverter switch triggering time can be directly calculated by using the instantaneous...
This paper proposes a hybrid selective harmonic elimination pulsewidth modulation (SHEPWM) scheme for common-mode voltage reduction in three-level neutral-point-clamped inverter-based induction motor drives. The scheme uses the conventional SHEPWM (C-SHEPWM) to control the inverter at high frequency (≥ 0.9 motor rated frequency) and uses the modified SHEPWM (M-SHEPWM) to control the inverter at low...
This paper proposes a new method to raise the power of the Solid Oxide Fuel Cell (SOFC) stacks in a coal-fired SOFC-based power plant to solve the sulfur contamination problem of the SOFC stacks. Rather than rapidly raise the power demand from the DC link and therefore the SOFC stack in a single step, the method raises the power demand from the DC link gradually in multi-steps. As a result, a much...
This paper presents an initial rotor position estimation method for low saliency interior permanent-magnet synchronous motor (IPMSM) drives. The method injects signals into the stationary α-β frame of the motor and substitutes the injected signals into the stationary α-β frame model of the motor to solve for the rotor position. In particular, the method injects specific signals into the motor to eliminate...
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