JPH0435696U

JPH0435696U -

Info

Publication number: JPH0435696U
Application number: JP7602690U
Authority: JP
Priority date: 1990-07-17
Filing date: 1990-07-17
Publication date: 1992-03-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す回路図、第２
図は直流電動機の速度制御回路の回路図、第３図
は従来の補正回路の回路図、第４図は直流電動機
の主回路電圧と界磁電流の関係を示す特性図、第
５図は負荷設備の一例を示す構成図、第６図は電
流と補正量の関係を示す特性図である。１……逆並列サイリスタ変換器、２，３……直
流電動機、４，５……サイリスタ変換器、６……
パルスゼネレータ、７，１２，１７，４１，４２
，４３，４５……反転アンプ、８……つき合わせ
回路、９，１１，１８，２１，２２……アンプ、
１０，１６……正逆方向切換スイツチ、１３，２
３，２４……変流器、２９……補正回路。 Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram of the speed control circuit of a DC motor, Figure 3 is a circuit diagram of a conventional correction circuit, Figure 4 is a characteristic diagram showing the relationship between the main circuit voltage and field current of a DC motor, and Figure 5 is a load A configuration diagram showing an example of the equipment, and FIG. 6 is a characteristic diagram showing the relationship between current and correction amount. 1... Anti-parallel thyristor converter, 2, 3... DC motor, 4, 5... Thyristor converter, 6...
Pulse generator, 7, 12, 17, 41, 42
, 43, 45...inverting amplifier, 8... matching circuit, 9, 11, 18, 21, 22... amplifier,
10, 16... Forward/reverse direction changeover switch, 13, 2
3, 24...Current transformer, 29...Correction circuit.

Claims

[Claim for Utility Model Registration] The armature current of multiple DC motors operated in parallel is controlled by thyristor converters connected in antiparallel, and a predetermined DC motor among the multiple DC motors is controlled at an automatic speed. In an automatic load balance circuit for a DC motor configured to perform control and apply field correction to other DC motors, the current detection circuit detects each armature current of the plurality of DC motors; an average value circuit that calculates an average value of armature currents of a plurality of DC motors detected by the circuit; and an average armature current determined by the average value circuit and an armature current of the DC motor to which the field correction is applied. an automatic load balance circuit for a DC motor, comprising: a deviation circuit for determining a deviation from the deviation circuit; and an output of the deviation circuit applies field correction to the other DC motor.