Control system for PWM inverter
    2.
    发明授权
    Control system for PWM inverter 失效
    PWM逆变器控制系统

    公开(公告)号:US4767976A

    公开(公告)日:1988-08-30

    申请号:US37853

    申请日:1987-04-13

    CPC分类号: H02P27/08 H02P27/047

    摘要: A control system for controlling a PWM inverter so that the inverter drives an induction motor at a variable voltage and a variable frequency while keeping constant a ratio of the output voltage of the inverter to the output frequency thereof, is disclosed which includes current component detecting means for detecting an effective current corresponding to a load, from the input current of the induction motor, frequency setting means for setting the output frequency of the PWM inverter, flux setting means for setting the amount of magnetic flux generated in the induction motor, correcting-frequency calculating means for calculating a frequency correcting quantity proportional to the effective current, and correcting-flux calculating means for calculating a flux correcting quantity proportional to the effective current. In a case where the detected effective current is judged to be less than a predetermined value, the frequency correcting quantity is added to the set output frequency to obtain an output frequency command, and the sum of the flux correcting quantity and the set amount of magnetic flux is multiplied by the value of the output frequency command to obtain an output voltage command, for the purpose of controlling the operation of the PWM inverter on the basis of the output frequency command and the output voltage command.

    摘要翻译: 一种用于控制PWM逆变器的控制系统,使得逆变器以可变电压和可变频率驱动感应电动机,同时保持变频器的输出电压与其输出频率的比例恒定,其包括电流分量检测装置 用于从感应电动机的输入电流检测与负载相对应的有效电流;频率设定装置,用于设定PWM逆变器的输出频率;磁通设定装置,用于设定感应电动机中产生的磁通量, 频率计算装置,用于计算与有效电流成比例的频率校正量;以及校正磁通计算装置,用于计算与有效电流成比例的磁通校正量。 在检测到的有效电流被判断为小于预定值的情况下,将频率校正量与设定的输出频率相加,得到输出频率指令,并且磁通校正量与设定的磁场量之和 为了根据输出频率指令和输出电压指令来控制PWM逆变器的运行,磁通量乘以输出频率指令的值以获得输出电压指令。

    FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARATUS IS CONNECTED
    4.
    发明申请
    FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARATUS IS CONNECTED 审中-公开
    过滤器与滤波器连接的滤波器和频率转换器

    公开(公告)号:US20090046435A1

    公开(公告)日:2009-02-19

    申请号:US12249398

    申请日:2008-10-10

    IPC分类号: H05K7/00

    CPC分类号: H02M7/003 H02M1/44

    摘要: A power converter in which a filter apparatus is connected to a wiring drawing portion, said filter apparatus including: a condenser element having an electronic part having an insulator as a dielectric material held between conductor plates; a sealing agent sealing said condenser element; a filter circuit comprising said condenser element; a connection conductor establishing wiring connections of said filter circuit; and a filter housing supporting said sealing agent.

    摘要翻译: 一种功率转换器,其中滤波器装置连接到布线部分,所述滤波器装置包括:电容器元件,具有电绝缘体作为介电材料保持在导体板之间; 密封所述聚光元件的密封剂; 包括所述电容元件的滤波电路; 建立所述滤波电路的接线连接的连接导体; 以及支撑所述密封剂的过滤器壳体。

    Frequency Converter
    5.
    发明申请
    Frequency Converter 审中-公开
    频率转换器

    公开(公告)号:US20080212279A1

    公开(公告)日:2008-09-04

    申请号:US11852545

    申请日:2007-09-10

    IPC分类号: H05K7/20

    CPC分类号: H05K7/20909

    摘要: A frequency converter includes a radiating section having a base and fins for radiating heat from a power semiconductor, a circuit substrate being provided at an opposite side of the fins with respect to the base, a housing that covers the circuit substrate, a guide for flowing air between the housing and the circuit substrate toward a downstream side of the fins, and a fan. The fan flows the air flown to the downstream side of the fins by the guide toward an upstream side of the fins.

    摘要翻译: 一种变频器包括具有底座的散热部件和用于从功率半导体辐射热量的翅片,电路基板相对于基座设置在翅片的相对侧,覆盖电路基板的壳体,流动用引导件 壳体和电路基板之间朝向翅片的下游侧的空气和风扇。 风扇通过引导件将流过翅片的下游侧的空气流向散热片的上游侧。

    Frequency converter
    6.
    发明申请
    Frequency converter 有权
    频率转换器

    公开(公告)号:US20060181847A1

    公开(公告)日:2006-08-17

    申请号:US11398643

    申请日:2006-04-06

    IPC分类号: H05K7/20

    CPC分类号: H05K7/20909

    摘要: A frequency converter includes a circuit substrate, a housing that covers at least the circuit substrate, a radiating section in which gases at an intake face are exhausted from an exhaust face so as to radiate heat, a fan provided on the exhaust face of the radiating section, and a guide provided on the housing to direct gases around the circuit substrate toward the intake face.

    摘要翻译: 一种变频器包括电路基板,至少覆盖电路基板的壳体,其中从吸气面排出吸气面的气体以散发热量的辐射部,设置在辐射部的排气面上的风扇 以及设置在壳体上的引导件,用于将电路基板周围的气体引向入口面。

    Electric circuit module
    7.
    发明申请
    Electric circuit module 有权
    电路模块

    公开(公告)号:US20050135065A1

    公开(公告)日:2005-06-23

    申请号:US11011085

    申请日:2004-12-15

    摘要: An electric circuit module comprising: an electric device comprising an electric circuit to serve for passage and interruption of electric current, a packing material packing the electric circuit and a plurality of wiring members to electrically connect the electric circuit with an external circuit; and a heat sink to radiate heat from the electric device. The electric circuit module includes a fixture to fix the heat sink and the electric device together so that a heat radiating surface of the electric device comes into contact with the heat sink. The fixture is formed with a recess to accommodate therein a part of the electric device so that the heat radiating surface of the electric device is exposed from the fixture. When the electric device is fixed to the heat sink by the fixture, the heat radiating surface comes into contact with the heat sink.

    摘要翻译: 一种电路模块,包括:电气装置,包括用于通过和中断电流的电路;包装电路的包装材料;以及多个布线构件,用于将电路与外部电路电连接; 以及散热器以从电气设备辐射热量。 电路模块包括将散热器和电气装置固定在一起的固定装置,使得电气装置的散热面与散热片接触。 固定装置形成有凹部,以容纳电气装置的一部分,使得电气装置的散热表面从固定装置露出。 当电子装置通过固定装置固定在散热片上时,散热面与散热片接触。

    POWER CONVERSION APPARATUS AND METHOD OF ESTIMATING POWER CYCLE LIFE
    9.
    发明申请
    POWER CONVERSION APPARATUS AND METHOD OF ESTIMATING POWER CYCLE LIFE 有权
    功率转换装置和估算功率循环寿命的方法

    公开(公告)号:US20080262750A1

    公开(公告)日:2008-10-23

    申请号:US12039979

    申请日:2008-02-29

    IPC分类号: G01B3/52

    CPC分类号: H02M5/451

    摘要: For applications in a facility where a power conversion apparatus is frequently started and stopped, a power conversion apparatus and a power cycle longevity estimation method are provided which improve an ease of use of the facility.The power conversion apparatus comprises power conversion circuits to supply ac power of variable voltage and variable frequency, a detection circuit to detect a temperature of the power semiconductor in the power conversion circuits, and a computation device to calculate a power cycle longevity of the power semiconductor based on a maximum temperature rise detected by the detection circuit.

    摘要翻译: 对于电力转换装置频繁启动和停止的设施中的应用,提供了改善设施的易用性的电力转换装置和电力周期寿命估计方法。 功率转换装置包括用于提供可变电压和可变频率的交流功率的功率转换电路,用于检测功率转换电路中的功率半导体的温度的检测电路,以及用于计算功率半导体的功率周期寿命的计算装置 基于由检测电路检测到的最大温升。

    Switching power supply circuit and frequency converter
    10.
    发明申请
    Switching power supply circuit and frequency converter 有权
    开关电源电路和变频器

    公开(公告)号:US20070058400A1

    公开(公告)日:2007-03-15

    申请号:US11599220

    申请日:2006-11-13

    IPC分类号: H02M3/335

    CPC分类号: H02M1/36

    摘要: An object of the present invention is to lower the voltage applied to the starting resistor of the starting circuit in a switching power supply circuit to reduce the power loss especially when the receiving voltage is high and thereby provide a small and inexpensive switching power supply circuit. According to the present invention, a switching power supply circuit comprises: a DC voltage section having two or more capacitors connected in series; and a PWM control circuit for receiving DC power supply from the DC voltage section and performing switching control on a primary side of a transformer in order for the switching power supply circuit to output a DC voltage of different voltage specifications; wherein the starting resistor for the PWM control circuit is connected to a connection point of the capacitors.

    摘要翻译: 本发明的目的是降低施加到开关电源电路中的起动电路的启动电阻的电压,从而降低功率损耗,特别是当接收电压高时,从而提供小型廉价的开关电源电路。 根据本发明,开关电源电路包括:串联连接有两个或更多个电容器的直流电压部分; 以及PWM控制电路,用于从直流电压部分接收直流电源,并对变压器的初级侧进行开关控制,以使开关电源电路输出不同电压规格的直流电压; 其中用于PWM控制电路的启动电阻器连接到电容器的连接点。