MOTOR CONTROLLER
    153.
    发明公开
    MOTOR CONTROLLER 失效
    电机控制器

    公开(公告)号:EP0856936A1

    公开(公告)日:1998-08-05

    申请号:EP95933635.5

    申请日:1995-10-06

    Applicant: HITACHI, LTD.

    Abstract: A motor controller made up of a power supply circuit rectifying an AC power supply for outputting desired DC voltages and, at the same time, improving the power factor of the AC power supply and a motor drive circuit for driving a motor. The same comprises a rectifier circuit for converting AC power supply to DC and a smoothing circuit, a converter circuit constituted of a chopper circuit for controlling the DC voltage by utilizing switching operation and inductance's energy storing effect, a motor drive device made up of an inverter circuit connected to the output of the converter circuit and a motor, a converter control circuit for controlling the switching operation of the chopper circuit, an inverter control circuit for controlling the switching operation of the inverter circuit thereby driving the motor, a speed detector circuit for detecting the position of the rotor of the motor and calculating the speed of the motor, a speed control circuit receiving the calculated speed value and a speed command value for controlling the motor speed through the inverter circuit, and a DC voltage control circuit receiving the output signal of the speed control circuit for controlling the DC voltage through the converter control circuit in accordance with the output signal. The DC voltage control circuit, when the output of the speed control circuit reaches a predetermined value, outputs a signal to cause the DC voltage to increase or decrease to the converter control circuit. The output of the speed control circuit is a duty ratio signal or a speed deviation signal of the calculated speed value from the speed command value.

    冷凍系統與用於冷凍系統之壓縮機的驅動系統 CHILLER SYSTEM AND DRIVE SYSTEM FOR A COMPRESSOR THEREOF
    156.
    发明专利
    冷凍系統與用於冷凍系統之壓縮機的驅動系統 CHILLER SYSTEM AND DRIVE SYSTEM FOR A COMPRESSOR THEREOF 失效
    冷冻系统与用于冷冻系统之压缩机的驱动系统 CHILLER SYSTEM AND DRIVE SYSTEM FOR A COMPRESSOR THEREOF

    公开(公告)号:TWI321391B

    公开(公告)日:2010-03-01

    申请号:TW095116216

    申请日:2006-05-08

    IPC: H02M

    CPC classification number: H02P27/08 B60H1/00428 H02P2201/09 Y02T10/88

    Abstract: 一具有增壓著變流器的可變速驅動器會被提供於以一感應馬達驅動的冷凍系統。該增壓變流器可為一二極體或閘流晶體整流器,再後接一增壓DC/DC轉換器或一三相脈寬調變增壓變流器。該增壓變流器會對該DC聯組提供一增升電壓,而使一增升電壓被該可變速驅動器的換流器供至該感應馬達。

    Abstract in simplified Chinese: 一具有增压着变流器的可变速驱动器会被提供于以一感应马达驱动的冷冻系统。该增压变流器可为一二极管或闸流晶体整流器,再后接一增压DC/DC转换器或一三相脉宽调制增压变流器。该增压变流器会对该DC联组提供一增升电压,而使一增升电压被该可变速驱动器的换流器供至该感应马达。

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