会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Drive device for a brushless motor
    • 无刷电机驱动装置
    • US5122715A
    • 1992-06-16
    • US391609
    • 1989-07-19
    • Yoshitsugu KimuraMasahiro YasoharaHiromitsu Nakano
    • Yoshitsugu KimuraMasahiro YasoharaHiromitsu Nakano
    • H02P6/06H02P6/18
    • H02P6/06H02P6/182Y02P80/116
    • A brushless motor driving device includes a plurality of motor driving coils and a plurality of driving transistors, coupled to the motor driving coils, for periodically supplying an electric power to the motor driving coils. A power supply switching circuit is provided for generating a power supply switching signal for driving the motor driving coils on the basis of a frequency signal corresponding to an oscillation frequency of a voltage controlled oscillator. A phase difference detector is provided for detecting a difference between the power supply switching signal and a counterelectromotive voltage generated in the motor driving coils during a period in which no electric power is supplied to the motor driving coils. The phase difference detected by the phase different detector circuit is used to control the oscillation frequency of the voltage controlled oscillator.
    • PCT No.PCT / JP88 / 01169 Sec。 371日期:1989年7月19日 102(e)日期1989年7月19日PCT提交1988年11月18日PCT公布。 第WO89 / 05061号公报。 日本1989年6月1日。无刷电动机驱动装置包括多个电动机驱动线圈和多个驱动晶体管,耦合到电动机驱动线圈,用于周期性地向电动机驱动线圈提供电力。 提供电源切换电路,用于根据与压控振荡器的振荡频率对应的频率信号产生用于驱动电动机驱动线圈的电源切换信号。 提供了一种相位差检测器,用于在电动机驱动线圈没有供电的时段期间检测电源切换信号和在马达驱动线圈中产生的反电动势电压之间的差异。 由相位不同检测器电路检测的相位差用于控制压控振荡器的振荡频率。
    • 8. 发明授权
    • Speed control apparatus for DC motor
    • 直流电机调速装置
    • US4477752A
    • 1984-10-16
    • US353420
    • 1982-03-01
    • Hiromitsu NakanoIsao Yoshida
    • Hiromitsu NakanoIsao Yoshida
    • H02P7/288G05B5/00
    • H02P7/2885Y10S388/902Y10S388/91
    • A speed control apparatus for DC motor (1), comprises a bridge circuit formed by the winding of the motor (1), a resistor (2) series thereto, and two resistors (3 and 4). Therein, a reference voltage (E.sub.r) is produced by dividing a voltage V.sub.ref of a constant voltage circuit (20) by a divider network (21+22). The voltage difference this reference voltage (E.sub.r) and a voltage produced across the detection output terminals "a" and "b" which is proportional to a counter electromotive force (E.sub.a) of the DC motor (1) is amplified by a differential amplifier (23+24). A current mirror circuit is formed by transistors (16), (17) and (18). The first transistor (16) regulated of its collector current (I.sub.r) by a constant current circuit (19) controls collector current of the second transistor (17), which controls input current of the constant voltage circuit (20). The third transistor (18) regulated of its collector current constantly controls the input current to the differential amplifier (23+24) for controlling the transistor (7) to control the motor current.
    • 一种用于直流电动机(1)的速度控制装置,包括由电动机(1)的绕组,与其串联的电阻器(2)和两个电阻器(3和4)形成的桥接电路。 其中,通过用恒定电压电路(20)的电压Vref除以分频网络(21 + 22)来产生参考电压(Er)。 与该直流电动机(1)的反电动势(Ea)成比例的检测输出端子“a”,“b”所产生的电压与该参考电压(Er)的电压差由差分放大器 23 + 24)。 电流镜电路由晶体管(16),(17)和(18)形成。 通过恒流电路(19)调节其集电极电流(Ir)的第一晶体管(16)控制控制恒压电路(20)的输入电流的第二晶体管(17)的集电极电流。 调节其集电极电流的第三晶体管(18)恒定地控制到差分放大器(23 + 24)的输入电流,以控制晶体管(7)来控制电动机电流。