Line voltage swings and drops exist in several eastern countries, which might cause cooling issues in refrigerators since compressors cannot start up at these low line voltages. On single-speed compressors, not just COP, but also start-up performance at low voltages, are crucial. Single-speed asynchronous motor torque-speed curves are crucial for compressor start-up performance, which is determined by motor design. The asynchronous motor winding design should be fine-tuned and the torque speed curve altered for proper start-up at low voltage levels, depending on the compressor mechanical efficiency and shaft power required. Even though the start torque at 0 rpm and breakdown torque values are sufficient for low voltage compressor starting, sudden torque drops throughout the curve have a negative impact on start up performance. The distribution of start winding has a significant impact on compressor startup performance. This research examines asynchronous motor torque-speed curve features and determines stator winding design approaches to improve compressor start-up performance. The results of motor and compressor tests back up the findings.
Author (s) Details
Tugba Cetinturk
Arcelik
A.S. Compressor Plant, Organize Sanayi Bolgesi, 1. Cadde 26110, Eski?ehir, Turkey.
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