| 摘要 |
<P>PROBLEM TO BE SOLVED: To determine that there is temperature abnormality in any reactor among a plurality of reactors connected in parallel with one another. <P>SOLUTION: A motor drive control device 42 for a compressor includes a rectifier 51, an inverter part 55, two reactors 52 and 53, thermistors 52a and 53a, and a control part 56. A rectifier 51 rectifies an AC voltage. The inverter part 55 generates a drive voltage for driving a motor 41a for a compressor by using a DC voltage after rectification, and outputs it to the motor 41a. The two reactors 52 and 53 are connected in parallel with each other between the rectifier 51 and the inverter part 55. The thermistors 52a and 53a detect the temperature of each reactor 52 and 53. The control part 56, which functions as an abnormality determining part 56a, determines the temperature abnormality of the reactors 52 and 53 based on a reactor relative temperature ΔTd which shows a difference in temperature of reactors 52 and 53. <P>COPYRIGHT: (C)2011,JPO&INPIT |
