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The single current sensor operation (SCSO) is favorable for cost reduction and fault-tolerance purposes in three-phase inverter-driven systems. This paper addresses a SCSO method based on tri-state pulse-width modulation technique (TSPWM). It enables fixed sampling points with minimal hardware and software requirements. Simultaneous three phase currents can be easily computed due to symmetrical sampling...
In this paper a new quasi-resonant DC link inverter is considered and this circuit is mathematically analyzed. Commutation time resonant circuit components are designed according to minimization of commutation times and power losses. Two new modulation methods are also proposed. After completion of circuit design, the whole motor drive is simulated. The major advantage of the proposed inverter is...
The conventional direct torque control (DTC) has more ripples in steady state, which results in acoustical noise and incorrect speed estimations. The main objective of this paper is to present a scheme for direct torque control of induction machines using hybrid space vector pulsewidth modulation (HSVPWM) to reduce switching losses and the steady state ripple in torque and flux. The HSVPWM technique...
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