An Improved Sensorless IPMSM Control at Low speeds and Standstill for Washing Machine Drives Using dsPIC Technology

Manef BOUROGAOUI, Houda Ben Attia Sethom, Ilhem Slam-Belkhodja, Hafedh Sammoud

Abstract


The purpose of this paper is to present an improved position estimation method without mechanical sensor. This method, based on the Alternating Voltage Injection (AVI) technique, is applied for washing machines with Interior Permanent Magnet Synchronous Motor (IPMSM). To validate the effectiveness of the proposed method, both comprehensive simulations using MATLAB/Simulink® and experimental results were conducted using a 1kW IPMSM designed for washing machines under different speed conditions.

The improved position estimation method was implemented using a fast digital signal processor (dsPIC30F6010A).

The obtained results highlight the advantages of the proposed technique at low speeds and standstill. Indeed, the improved position estimation method offers an estimated average position error within 2°.

The paper describes an improved position estimation method at low speeds and standstill. The proposed sensorless control scheme does not require an extra hardware or huge memory space for real time implementation.


Keywords


Interior Permanent Magnet Synchronous Motor (IPMSM); Low speeds; Standstill; Shifted High Frequency (SHF) current demodulation; Washing Machine Drive

Full Text: PDF