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公开(公告)号：US3610961A
公开(公告)日：1971-10-05
申请号：US3610961D
申请日：1969-06-26
申请人： GEN ELECTRIC
CPC分类号： H02M7/1623
摘要： A silicon controlled rectifier phase control system. While a load-controlling silicon controlled rectifier is reversed biased, a capacitive circuit is charged and then discharges for a time including the succeeding half cycle when the silicon controlled rectifier is forward biased to generate a reference voltage. This reference voltage is compared with a control voltage to cause the load-controlling silicon controlled rectifier to be turned on at an appropriate time. Controls for single phase, half- and fullwave control and three-phase systems are illustrated. Modifications to assure operation with overriding input signals and feedback circuit means to improve linearity and line voltage compensation are described.
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公开(公告)号：US3662264A
公开(公告)日：1972-05-09
申请号：US3662264D
申请日：1969-06-26
申请人： GEN ELECTRIC
CPC分类号： G01R21/10
摘要： A wattmeter of the rectifier bridge type using a four-arm diode bridge having input and output circuits into which current and voltage signals are introduced. A squaring network comprising parallel connected resistors and diodes permits the product of the voltage and current signals to be read out by a milliammeter in the input circuit.
摘要翻译： 使用具有输入和输出电路的四臂二极管桥的整流桥型的瓦特计，其中引入电流和电压信号。 包括并联连接的电阻器和二极管的平方网络允许电压和电流信号的乘积由输入电路中的毫安表读出。
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3.发明授权Power factor transducer having voltage and current responsive switching means biased by an intermittently generated voltage 失效具有电压和电流响应开关的功率因数传感器由间接发电电压偏置
公开(公告)号：US3562647A
公开(公告)日：1971-02-09
申请号：US3562647D
申请日：1969-03-14
申请人： GEN ELECTRIC
CPC分类号： G01R21/006
摘要： A POWER FACTOR TRANSDUCER. FIRST AND SECOND SWITCHING MEANS IN A BRIDGE CIRCUIT ARE CLOSED DURING CORRESPONDING HALF CYCLES OF LINE CURRENT AND A POWER FACTOR VOLTAGE, POWER FACTOR VOLTAGE BEING IN PHASE WITH LINE CURRENT AT UNITY POWER FACTOR. LINE VOLTAGE ENERGIZES THE BRIDGE THROUGH A CAPACITOR ONLY DURING POSITIVE GOING POWER FACTOR VOLTAGE HALF-CYCLES. BRIDGE IMBALANCE, CAUSED BY NON-SIMULTANEOUS SWITCHING DURING NON-UNITY POWER FACTOR CONDITIONS INDICATES THE POWER FACTOR.
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公开(公告)号：US3577177A
公开(公告)日：1971-05-04
申请号：US3577177D
申请日：1969-06-26
申请人： GEN ELECTRIC
摘要： A zero-crossing silicon controlled rectifier control system for single-phase, full-wave and three-phase operation. An error signal representing the difference between desired and actual load values in integrated to control a first switch constituted by complementary transistors. A second switch, in series with a pulse generator and the first switch, is conductive during portions of alternate half cycles. Concurrent conduction by both switches energizes the pulse generator which causes a pulse to be generated on the energization. This turns on a first silicon controlled rectifier at the beginning with the positive-going zero crossing. A second silicon controlled rectifier controlled by a trigger circuit conducts during the next half cycle in response to load energization.
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