PROJECT TITLE :

Inverter Power Control Based on DC-link Voltage Regulation for IPMSM Drives without Electrolytic Capacitors - 2017

ABSTRACT:

DC-link electrolytic capacitor critically affects the lifetime of the motor drive system. This paper proposes an inverter power management strategy based on dc-link voltage regulation for the electrolytic capacitor-less interior permanent magnet synchronous motor drive system. The dc-link electrolytic capacitor is replaced by a small film capacitor and the facility factor correction circuit is also eliminated. Hence, the inverter power should be regulated effectively to realize high input power issue and low grid current harmonics. The inverter power management loop primarily based on proportional resonant (PR) controller is established to regulate the inverter power into sinusoidal wave. The PR controller will be designed to attain a high gain at the desired frequency and the parameters are straightforward to design due to the easy structure. In addition, a power compensation technique primarily based on the dc-link voltage regulation is used to diminish the error of inverter power control, that does not depend on the precise calculation and is simple to appreciate. The effectiveness of the proposed method is demonstrated by the experimental results on an air conditioner. The input power factor will reach zero.992 and therefore the harmonics of grid current are considerably lower than the requirement of EN61000-3-2 standard.