Multiphase alternating current regulation system for transformer-coupled loads专利检索-直流分量电路专利检索查询-专利查询网

Multiphase alternating current regulation system for transformer-coupled loads

阅读：450发布：2023-07-26

专利汇可以提供Multiphase alternating current regulation system for transformer-coupled loads专利检索，专利查询，专利分析的服务。并且In a multiphase alternating current regulating system employing controlled rectifiers operated in accordance with phase commutation techniques, the improvement of circuitry for eliminating direct current components across loads supplied by the three-phase system which would otherwise occur when the loads become unbalanced.，下面是Multiphase alternating current regulation system for transformer-coupled loads专利的具体信息内容。

权利要求

1. In a current regulating system of the type in which alternating current is supplied through controlled rectifiers to a plurality of loads and wherein each of said rectifiers has an anode terminal and a cathode terminal; the combination of a controllable firing circuit connected to said controlled rectifiers whereby current supplied to the load is controlled by varying the firing angle of said controlled rectifiers, operational amplifier meanS coupled to said controlled rectifiers for comparing the amplitudes of the voltages appearing at corresponding terminals of at least two of said controlled rectifiers, said operational amplifier means being adapted to produce an output signal when the amplitudes of the voltages compared thereby are not the same indicating the existence of a direct current component across a load, and means including saturable magnetic amplifying means coupled to the output of said operational amplifier means and responsive to said output signal for varying the firing angles of said controlled rectifiers until said direct current component no longer exists.

2. The current regulating system of claim 1 wherein the current is supplied in a three-phase system and wherein said operational amplifier means includes two operational amplifiers one of which compares the amplitudes of a first and second of said phases and the second of which compares the amplitudes of the second and third of said phases.

3. The current regulating system of claim 2 wherein said saturable magnetic amplifying means includes three separate saturable magnetic amplifiers, two of which are connected to the output of an associated one of said operational amplifiers through respective first impedance elements and the third of which is connected to the outputs of both of said operational amplifiers through respective second impedance elements.

4. The current regulating system of claim 3 wherein said second impedance elements have impedance values twice those of the first impedance elements.

5. The current regulating system of claim 3 wherein said first and second magnetic amplifiers act to shift the firing angle of said controlled rectifiers in one direction while said third magnetic amplifier acts to shift said firing angle in the opposite direction.

6. The current regulating system of claim 1 including transformer means for supplying alternating current from said controlled rectifiers to a plurality of loads.

7. The current regulating system of claim 1 including diodes connected in shunt with said controlled rectifiers.

说明书全文

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Multiphase alternating current regulation system for transformer-coupled loads

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