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This paper presents a sliding mode voltage controller in order to regulate the dc-link voltages of a three level neutral-point-clamped (NPC) inverter of a shunt active power filter. A Lyapunov function is used to determine sliding mode control laws that guarantees the stability of the control system. Also a selective harmonic extraction method is employed in the control system to compensate desired...
A new dc-link voltage controller of a shunt active power filters is proposed in this paper. A fixed and regulated dc-link voltage is necessary to improve dynamic response of shunt active power filter. The dc-link voltage regulation is done by a sliding mode control method. Comparison made between the proposed controller and conventional PI regulator that used for dc-link voltage regulation. In this...
In design of a parallel resonant Induction heating system, choosing a proper capacitance for the resonant circuit is quite important. The capacitance affects the resonant frequency, output power, heating efficiency and power factor. In this paper, with consideration to the function of equivalent series resistance (ESR), optimal capacitance is calculated. The induction heating resonance capacitor is...
This paper investigated influence of load type, operational mode and modulation index on the SHEM current source inverter. For this purpose an inverter designed and constructed which can be operated in single and three phase mode with any number of harmonics elimination capability. In current source inverters with resistive-inductive loads, over voltages in output voltage waveform appears. To remove...
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