Abstract
This paper proposes a PWM current source inverter-induction motor drive system with photovoltaic generation. Solar cells are inserted in dc link to obtain constant current characteristics and they are connected to the utility system by using a PWM converter. The PWM converter is controlled to obtain the maximum output photovoltaic (PV) power. The PWM inverter supplies sinusoidal currents for an induction motor which is driven by constant V/f control. A pulsewidth control is utilized in the inverter section because of constant dc link current caused by a peculiar V-I characteristics of solar cells. In the presented system, the PV power is not only used for the inverter-induction motor drive but also flowed into the utility system. The experimental results in the steady state show that the proposed system has sinusoidal current with unity power factor in the utility system, the maximum output PV power, and sinusoidal current/voltage for a motor. The demonstrated results for the separation of the utility system or the motor from the converter-PV-inverter system are given.
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