A dual-power excitation circuit for controlling the rapid operation of electromagnetic coils

Abstract

The invention relates to an exciting circuit controlling solenoid coils to work rapidly and reliably under the situation of two power sources. The exciting circuit comprises a first solid relay and a second solid relay, the first solid relay and the second solid relay are connected with a low-voltage power source and a high-voltage power source respectively, and the output end of the first solid relay and the output end of the second solid relay are respectively connected with the solenoid coils; the output end of the first solid relay is also connected with the positive pole of the control signal end of the second solid relay through a branch circuit, and the negative pole of the control signal end of the second solid relay is connected with an electrolytic capacitor through a potentiometer; a first diode playing a role in blocking is arranged on the connecting line of the output end of the first solid relay and the solenoid coils. According to the dual-power-source exciting circuit controlling the solenoid coils to work rapidly, the structure of the dual-power-source exciting circuit controlling the solenoid coils to work rapidly is greatly simplified, a printed circuit board does not need to be designed or manufactured, the exciting circuit can be directly installed in a control cabinet or a control box, and debugging can be conducted conveniently.

Description

technical field [0001] The invention relates to the control technology of electromagnetic coils, in particular to an excitation circuit for controlling the rapid and reliable operation of electromagnetic coils under the condition of dual power supplies. Background technique [0002] The work of the electromagnetic coil mainly depends on the excitation current provided by its excitation circuit. Based on the inductance characteristics of the electromagnetic coil, for a fast-working electromagnetic coil, an excitation power supply with two voltage levels, one high and one low, is generally required to provide a short time when starting. (several milliseconds - tens of milliseconds) high voltage, so that the excitation current can be quickly established, and then the electromagnetic coil's pull-in force is formed, and then the excitation current of the electromagnetic coil is maintained at the normal working voltage to maintain the electromagnetic coil's holding force. [0003]...

AI Technical Summary

Problems solved by technology

[0003] For fast-working electromagnetic coils, the existing dual-power excitation circuits are all implemented with digital circuits or even circuits with microprocessors and power tubes. At this time, printed circuit boards must be designed and manufactured, resulting in complex designs and high costs. , poor anti-interference ability, inconvenient installation and debugging, etc.

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