| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that, when an input voltage of an AC power supply fluctuates, cooling ability or heating ability drops, and a large burden is applied on an electric circuit and a motor, resulting in possibility of occurrence of failure. <P>SOLUTION: The compressor controller controls a compressor 1 of a heat pump cycle, and includes a converter 7 in which an AC power supply 6 is input and converted to be an DC voltage, an inverter 8 which converts the DC voltage from the converter 7 to an AC, which is supplied to an electric motor 5, a drive control part 12 which controls drive frequencies of the electric motor 5 by varying frequencies of the AC from the inverter 8, a voltage detection part 10 which detects an input voltage value of the AC power supply 6, a release value setting part 14 which sets a current release value based on the input voltage value, a current detection part 9 which detects an input current value of the AC power supply 6, and a current release control part 15 which lowers the drive frequencies of the electric motor 5 when the input current value exceeds the current release value set by the release value setting part 14. <P>COPYRIGHT: (C)2012,JPO&INPIT |
