| 摘要 |
PROBLEM TO BE SOLVED: To increase the variation range of output torque of a compressor motor by providing a regenerative mode in which the output torque becomes negative and increase internal coolant temperature and lubricant temperature inside the compressor by maximizing the motor heat generation effect.SOLUTION: An inverter controller that controls a current value of the motor so that the output torque of a compressor motor becomes a desired torque switches a power-running mode in which the output torque becomes positive including zero in a defrosting operation mode and a regenerative mode in which the output torque becomes negative periodically. |
