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热词
    • 10. 发明授权
    • Sample and hold-circuit arrangement for an electrical motor  simulator
of an electronic motor protection relay
    • 电动机保护继电器的电机模拟器的采样和保持电路装置
    • US3996480A
    • 1976-12-07
    • US618211
    • 1975-09-30
    • Michael Hentschel
    • Michael Hentschel
    • H02H6/00H02H7/085G11C27/02
    • H02H6/00
    • A sample and hold-circuit arrangement for an electrical motor simulator of an electronic motor protection relay wherein the motor simulator is charged by a charging current source with clocked charging currents through a main or primary switch controlled by clock signals. A sample and hold-amplifier containing a storage capacitor and an electronic switching device are connected through the main switch at the motor simulator and the electronic switching device is controlled by the clock signals. The sample and hold-amplifier containing the storage capacitor is electrically connected during the charging cycles to the motor simulator for recharging of the storage capacitor to the charging voltage of the motor simulator and during the rest cycles is electrically disconnected from the motor simulator for the control or triggering of the sample and hold-amplifier by the charging voltage of the recharged storage capacitor.
    • 一种用于电子电动机保护继电器的电动机模拟器的采样和保持电路装置,其中电动机模拟器由具有时钟充电电流的充电电流源通过由时钟信号控制的主开关或主开关充电。 包含存储电容器和电子开关装置的采样和保持放大器通过电机模拟器上的主开关连接,电子开关装置由时钟信号控制。 包含存储电容器的采样和保持放大器在充电周期期间电连接到电动机模拟器,用于将存储电容器充电到电动机模拟器的充电电压,并且在休止周期期间与用于控制的电动机模拟器电连接 或通过充电存储电容器的充电电压触发采样和保持放大器。