Compressor Drive System using Single Shunt Current Detection and Adaptive Flux Observer for Room Air Conditioners

Abstract

This paper discusses a compressor drive system for a room air conditioner. The system uses a single shunt current detection and a position sensor-less vector control technique. In addition, a new adaptive flux observer that considers the fluctuation in current detection timing is also proposed. The proposed observer improves the accuracy of speed estimation in a high-speed rotational condition. The room air conditioner, including this compressor drive system, has been mass-produced in our company.