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    • 7. 发明授权
    • Converter for synchronous motor starting
    • 变频器用于同步电机启动
    • US5315225A
    • 1994-05-24
    • US755796
    • 1991-09-30
    • Theodore M. HeinrichColin D. Schauder
    • Theodore M. HeinrichColin D. Schauder
    • H02P1/52H02P1/46
    • H02P1/52
    • A converter for synchronous motor starting rectifies the input voltage from a polyphase input power source to develop a starting current having a substantial DC component. The starting current is then sequentially applied to each of the phase windings in the synchronous motor, with the sequential rate of application occurring at a continuously increasing frequency. The angular velocity of the motor synchronously increases with the increasing frequency of the sequential rate of application of the starting current to the phase windings. By application of the starting current at an increasing frequency, the synchronous motor operates in a forced commutation mode. The starting current is removed when the angular velocity of the motor is synchronous with the constant frequency of the polyphase input power source. When the starting current is removed, and the motor is synchronous with the input power, the input power may then be applied directly to the motor in a natural commutation mode.
    • 用于同步电动机的A转换器对来自多相输入电源的输入电压进行整流,以开发具有大量DC分量的启动电流。 然后将起动电流顺序地施加到同步电动机中的每个相绕组,其中连续的施加速率以连续增加的频率发生。 电动机的角速度随着起动电流施加到相绕组顺序速率的频率的增加而同步增加。 通过以增加的频率施加起动电流,同步电动机以强制换向模式运行。 当电动机的角速度与多相输入电源的恒定频率同步时,启动电流被去除。 当启动电流被去除并且电动机与输入功率同步时,输入功率然后可以以自然换向模式直接施加到电动机。
    • 8. 发明授权
    • Variable speed a-c drive
    • 变速a-c驱动
    • US4814964A
    • 1989-03-21
    • US149234
    • 1988-01-27
    • Colin D. SchauderJohn RosaTheodore M. Heinrich
    • Colin D. SchauderJohn RosaTheodore M. Heinrich
    • H02P1/46H02P25/02H02P27/06H02M5/45
    • H02P1/46H02P25/024
    • A load commutated inverter (LCI) a-c drive system includes a synchronous motor with two 30 degree angularly displaced sets of three-phase windings. Each set of motor windings is powered by a three-phase inverter fed by a three-phase rectifier in a separate d-c loop. The three-phase rectifiers are fed by either a generator with two angularly displaced sets of three-phase windings or by a transformer with a three-phase primary winding, and delta and wye secondary windings separately supplying the two rectifiers. Twelve-pulse operation in the line commutated mode with substantially constant d-c link currents significantly reduces torque pulsations. At low speeds, sinusoidal segment pulsed d-c currents in the d-c links are gated to pairs of windings in the two sets of motor windings which generate component MMFs either 90 degrees or 150 degrees displaced to produce a resultant rotating motor MMF of constant magnitude to completely eliminate torque pulsations. Since the repetition rates of the pulsed d-c link currents in these two instances are 2 and 1.2 times the fundamental motor frequency respectively, the range of motor speeds over which torque pulsations can be completely eliminated is substantially increased, while torque pulsations at all higher speeds are greatly reduced.
    • 9. 发明授权
    • Electronic AC electric energy measuring circuit
    • 电子交流电能测量电路
    • US4182983A
    • 1980-01-08
    • US923530
    • 1978-07-11
    • Theodore M. HeinrichJoseph J. Zelezniak
    • Theodore M. HeinrichJoseph J. Zelezniak
    • G01R22/00G01R21/127G01R21/06
    • G01R21/127
    • An electronic AC electric energy measuring circuit converts a di/dt analog input signal into a pulse width modulated signal responsive to the amplitude of a current component of an alternating current energy quantity to be measured. The pulse width modulated signal is produced by a first modulator circuit including an integrator circuit deriving both a modulating frequency signal and a current analog signal proportional to the current component. A multiplying circuit receives a voltage analog input signal and applies it to a reference input of a second modulator circuit. The modulating control of the second modulator circuit receives the pulse width modulated signal so that the multiplying circuit produces a variable amplitude and pulse width modulated signal having an average value equal to an average power measurement. An analog to frequency converter including a second integrator circuit receives the output of the multiplying circuit to produce an output pulse representative of a quantized amount of electric energy.
    • 电子交流电能测量电路根据要测量的交流电量的电流分量的振幅将di / dt模拟输入信号转换成脉宽调制信号。 脉宽调制信号由包括导出调制频率信号和与电流分量成比例的电流模拟信号的积分器电路的第一调制器电路产生。 乘法电路接收电压模拟输入信号并将其施加到第二调制器电路的参考输入。 第二调制器电路的调制控制接收脉冲宽度调制信号,使得乘法电路产生具有等于平均功率测量的平均值的可变幅度和脉宽调制信号。 包括第二积分器电路的模数转换器接收乘法电路的输出,以产生表示量化量的电能的输出脉冲。
    • 10. 发明授权
    • Wireless emergency power interrupting system for multibranch circuits
    • 多分支电路的无线应急电源中断系统
    • US4164771A
    • 1979-08-14
    • US859075
    • 1977-12-09
    • Theodore M. Heinrich
    • Theodore M. Heinrich
    • H02H3/16G01R31/28H01H83/04H02H3/00H02H3/33
    • H01H83/04H02H3/334H02H3/335
    • A system for the emergency deenergization of a multibranch power circuit includes a ground fault circuit interrupter having capability to trip under both ground fault and grounded neutral conditions. A plurality of receptacles are provided on the circuit to receive connecting plugs of electrical devices to be powered. A removable plug adapted for insertion into any of the receptacles includes the series combination of a normally open pushbutton switch and resistor connected between plug pins which are in contact with the neutral and ground conductors of the circuit so that actuation of the switch when the plug is inserted in a receptacle establishes a low-impedance path from neutral to ground which is detected by the ground fault circuit interrupter. This causes the interrupter to trip and deenergize the circuit.
    • 用于多分支电力电路的紧急断电的系统包括具有在接地故障和接地中性条件下跳闸能力的接地故障电路断续器。 多个插座设置在电路上以接收要被供电的电气设备的连接插头。 适于插入任何插座中的可移除插头包括常开按钮开关和连接在插头销之间的电阻的串联组合,这些插头与电路的中性线和接地导体接触,从而当插头为 插入插座,建立由接地故障电路断路器检测到的从中性线到地线的低阻抗路径。 这导致断路器跳闸和断电。