Compressor winding resistance online estimation method and device and compressor control method

The invention discloses a compressor winding resistance online estimation method and device, a compressor control method, a motor controller and an air conditioner. The online estimation method comprises the steps that the exhaust temperature of a compressor is detected; determining a compressor winding temperature according to the compressor exhaust temperature; and estimating compressor winding resistance according to the compressor winding temperature. According to the online estimation method, the winding resistance can be estimated in real time according to the exhaust temperature of the compressor, the acquisition accuracy of the winding resistance in the operation process of the compressor is guaranteed, and the control performance of the compressor is improved. 本发明公开了一种压缩机绕组电阻在线估算方法和装置、压缩机控制方法、电机控制器和空调器,该在线估算方法包括：检测压缩机排气温度；根据压缩机排气温度确定压缩机绕组温度；根据压缩机绕组温度估算压缩机绕组电阻。本发明的在线估算方法，能够根据压缩机的排气温度实时估算绕组电阻，保证压缩机运行过程中绕组电阻的获取准确性，提高压缩机的控制性能。