Scholarlink

<p>This article proposes a control scheme to compensate for rotor position estimation error in sensorless control that arises from sudden load torque changes during the low-speed operation of washing machines. The load torque characteristics, generated by the movement of laundry and water in the washing machine, vary as the speed changes. In particular, at a low speed of approximately 50&#xa0;rpm, which corresponds to the washing stroke, the centrifugal force acting on the laundry weakens. This causes the laundry to move irregularly, resulting in rapid torque fluctuations. The proposed scheme formulates a rotor speed compensation term to reflect the load torque variations. This compensation term is incorporated into the conventional back-electromotive-force (back-EMF) based sensorless control to reduce rotor position estimation error. The proposed scheme enhances control stability in transient states during low-speed operation while maintaining a low computational burden. The effectiveness of the proposed scheme is verified through simulations and experiments using a surface-mounted permanent magnet synchronous motor (SPMSM) designed for washing machines.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Rotor Position Estimation Error Compensation Using Back-EMF Based Sensorless Control for Low-Speed Operation in Washing Machines

  • 期刊论文

  • 发表日期：

    2025年3月24日

查看全文
  • Yujin Shin,
  • Kwonhoon Kim,
  • Younghoon Cho,
  • Hamin Song,
  • Kwangsik Kim

摘要

This article proposes a control scheme to compensate for rotor position estimation error in sensorless control that arises from sudden load torque changes during the low-speed operation of washing machines. The load torque characteristics, generated by the movement of laundry and water in the washing machine, vary as the speed changes. In particular, at a low speed of approximately 50 rpm, which corresponds to the washing stroke, the centrifugal force acting on the laundry weakens. This causes the laundry to move irregularly, resulting in rapid torque fluctuations. The proposed scheme formulates a rotor speed compensation term to reflect the load torque variations. This compensation term is incorporated into the conventional back-electromotive-force (back-EMF) based sensorless control to reduce rotor position estimation error. The proposed scheme enhances control stability in transient states during low-speed operation while maintaining a low computational burden. The effectiveness of the proposed scheme is verified through simulations and experiments using a surface-mounted permanent magnet synchronous motor (SPMSM) designed for washing machines.