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    • 35. 发明专利
    • AIR CONDITIONER WITH MOTOR-DRIVEN COMPRESSOR
    • JPH0761230A
    • 1995-03-07
    • JP21553293
    • 1993-08-31
    • MATSUSHITA ELECTRIC IND CO LTD
    • GOTO NAOMIYOSHIDA MAKOTONISHINOMIYA MASAFUMI
    • B60L1/00B60H1/32H02J1/00H02J7/00
    • PURPOSE:To reduce voltage difference between battery voltage and condenser voltage at the time of closing a switchgear so as to solve problems such as the fusion of a fuse and the damage of the switchgear in an air conditioner provided with a motor-driven compressor with a d.c. power supply as a drive source. CONSTITUTION:A condenser 11 is charged by a time constant determined by the resistance value of a resistor 8 and the electrostatic capacity value of the condenser 11. When an input voltage detecting means 7 detects the voltage of the specified value or more, a switchgear 3 is closed by a control part 6, and a motor-driven compressor is driven. In this case, prior to closing the switchgear 3 by the control part 6 at the time of the input voltage detecting means 7 detecting the voltage of the specified value or more, a second switchgear 4 is closed, and the condenser 11 is charged through a small resistor 9. Accordingly, even if battery voltage has risen from the charge starting time when the switchgear 3 is closed subsequently, voltage difference between battery voltage and condenser voltage is reduced so as to prevent the fusion of a fuse 10 and the damage of the switchgear 3.
    • 37. 发明专利
    • Three-phase open-phase detection circuit and air conditioner employing it
    • 三相开关相位检测电路和空调器使用
    • JP2005304129A
    • 2005-10-27
    • JP2004113806
    • 2004-04-08
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • KOBAYASHI ATSUSHINISHINOMIYA MASAFUMIHATANAKA HIROSHI
    • G01R31/02H02H3/13
    • PROBLEM TO BE SOLVED: To provide a three-phase open-phase detection circuit performing the open-phase detection of a three-phase AC power supply certainly and capable of the protection control of a three-phase load.
      SOLUTION: A three-phase AC power supply 1, a three-phase load 3 connected with the three-phase AC power supply 1 through a switch 2, a first current detection circuit 4 having a switching control section 7 of the switch 2 and detecting the current of first and second phases of the three-phase AC power supply 1 in a state of an in-phase, and a second current detection circuit 5 for detecting currents of second and third phases of the three-phase AC power supply 1 in the state of the in-phase are provided. Power supply to the drive section 21 of the switch 2 is taken out of the second phase of the three-phase AC power supply 1 and when the first or the second current detection circuit 4, 5 detects a current of a predetermined level or below, a control section 7 interrupts power supply to a compressor 3 by turning the switch 2 on thus performing protection control.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种三相开关相位检测电路,其执行三相交流电源的开相检测,并能够进行三相负载的保护控制。

      解决方案:三相交流电源1,通过开关2与三相交流电源1连接的三相负载3,具有开关的开关控制部分7的第一电流检测电路4 2并且以同相的状态检测三相交流电源1的第一相和第二相的电流;以及第二电流检测电路5,用于检测三相AC电力的第二相和第三相的电流 提供同步状态下的电源1。 向开关2的驱动部21供电的电力从三相交流电源1的第二相中取出,当第一或第二电流检测电路4,5检测出预定电平以下的电流时, 控制部分7通过转动开关2来中断对压缩机3的供电,由此进行保护控制。 版权所有(C)2006,JPO&NCIPI