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    • 2. 发明申请
    • Load drive device and control system of the same
    • 负载驱动装置和控制系统相同
    • US20100026355A1
    • 2010-02-04
    • US12458915
    • 2009-07-28
    • Masatoshi YokaiSatoshi YoshimuraKouji NakamuraMasao Yamada
    • Masatoshi YokaiSatoshi YoshimuraKouji NakamuraMasao Yamada
    • H03L7/00
    • H03K17/08122
    • A load drive device for driving an inductive load by PWM controlling a switching element includes synchronization control unit, a synchronization signal input terminal, and a synchronization signal output terminal. The synchronization control unit outputs the PWM signal to the switching element. The synchronization control unit receives a synchronization signal through the input terminal from an exterior. The synchronization control unit outputs the synchronization signal through the output terminal to an exterior. When the synchronization control unit does not receive the synchronization signal, the synchronization control unit outputs the synchronization signal such that a first switching period of the PWM signal is prevented from overlapping with a second switching period of a PWM signal of an external device. When the synchronization control unit receives the synchronization signal, the synchronization control unit generates the PWM signal based on the synchronization signal.
    • 用于通过PWM控制开关元件驱动感性负载的负载驱动装置包括同步控制单元,同步信号输入端子和同步信号输出端子。 同步控制单元将PWM信号输出到开关元件。 同步控制单元从外部通过输入端子接收同步信号。 同步控制单元通过输出端子输出同步信号到外部。 当同步控制单元没有接收同步信号时,同步控制单元输出同步信号,使得防止PWM信号的第一开关周期与外部设备的PWM信号的第二开关周期重叠。 当同步控制单元接收同步信号时,同步控制单元基于同步信号产生PWM信号。
    • 8. 发明授权
    • Rotor position sensing system of brushless motor
    • 无刷电机转子位置传感系统
    • US07956561B2
    • 2011-06-07
    • US12153030
    • 2008-05-13
    • Atsushi KanamoriSatoshi Yoshimura
    • Atsushi KanamoriSatoshi Yoshimura
    • H02P6/06
    • H02P6/18
    • A rotor position detecting circuit includes a first position detecting circuit having a low-pass filter that shapes up phase voltage induced in a phase coil and a first comparator that compares the output voltage of the low-pass filter with a threshold level to form a first rotor position signal, and a second position detecting circuit having a second comparator that compares the phase voltage with a threshold voltage and a control unit that digitally processes the output voltage of the second comparator to form a second rotor position signal. The control unit corrects the first rotor position signal by the second rotor position signal to provide a final rotor position signal when the rotation speed of the brushless DC motor is in a measurable range.
    • 转子位置检测电路包括第一位置检测电路,该第一位置检测电路具有形成相位线圈中感应的相电压的低通滤波器和将低通滤波器的输出电压与阈值电平进行比较的第一比较器,以形成第一 转子位置信号,以及第二位置检测电路,其具有将相电压与阈值电压进行比较的第二比较器和对第二比较器的输出电压进行数字处理以形成第二转子位置信号的控制单元。 控制单元通过第二转子位置信号来校正第一转子位置信号,以在无刷直流电动机的转速处于可测量范围时提供最终的转子位置信号。
    • 9. 发明申请
    • Rotor position sensing system of brushless motor
    • 无刷电机转子位置传感系统
    • US20080297079A1
    • 2008-12-04
    • US12153030
    • 2008-05-13
    • Atsushi KanamoriSatoshi Yoshimura
    • Atsushi KanamoriSatoshi Yoshimura
    • H02P6/18
    • H02P6/18
    • A rotor position detecting circuit includes a first position detecting circuit having a low-pass filter that shapes up phase voltage induced in a phase coil and a first comparator that compares the output voltage of the low-pass filter with a threshold level to form a first rotor position signal, and a second position detecting circuit having a second comparator that compares the phase voltage with a threshold voltage and a control unit that digitally processes the output voltage of the second comparator to form a second rotor position signal. The control unit corrects the first rotor position signal by the second rotor position signal to provide a final rotor position signal when the rotation speed of the brushless DC motor is in a measurable range.
    • 转子位置检测电路包括第一位置检测电路,该第一位置检测电路具有形成相位线圈中感应的相电压的低通滤波器和将低通滤波器的输出电压与阈值电平进行比较的第一比较器,以形成第一 转子位置信号,以及第二位置检测电路,其具有将相电压与阈值电压进行比较的第二比较器和对第二比较器的输出电压进行数字处理以形成第二转子位置信号的控制单元。 控制单元通过第二转子位置信号来校正第一转子位置信号,以在无刷直流电动机的转速处于可测量范围时提供最终的转子位置信号。
    • 10. 发明授权
    • Apparatus and method for driving inverter circuit
    • 逆变电路驱动装置及方法
    • US07453679B2
    • 2008-11-18
    • US11709081
    • 2007-02-22
    • Masatoshi YokaiSatoshi YoshimuraAkira Ando
    • Masatoshi YokaiSatoshi YoshimuraAkira Ando
    • H02H5/04H02H9/08H02H7/00
    • H02M7/53875H02M1/32
    • An inverter apparatus includes an inverter circuit, a temperature sensor, and a control circuit. The inverter circuit is driven by a PWM signal and includes switching elements that are divided in first and second groups. The temperature sensor detects a temperature of at least one of the switching elements of the first group. The control circuit controls a duty cycle of the PWM signal such that a first value of heat generated in the first group is equal to or greater than a second value of heat generated in the second group. The control circuit performs an overheat protection for protecting the inverter circuit from overheating when the detected temperature is equal to or greater than a threshold temperature.
    • 逆变器装置包括逆变器电路,温度传感器和控制电路。 逆变器电路由PWM信号驱动,并且包括在第一组和第二组中分开的开关元件。 温度传感器检测第一组的至少一个开关元件的温度。 控制电路控制PWM信号的占空比,使得第一组中产生的热的第一值等于或大于第二组中产生的热的第二值。 当检测到的温度等于或大于阈值温度时,控制电路执行过热保护以保护逆变器电路免于过热。