Excitation starting power panel of single-push electromagnet based on double-coil structure

Abstract

The invention relates to an excitation starting power panel of a single-push electromagnet based on a double-coil structure type, which comprises the electromagnet of the double-coil structure type, an AC power supply, an input circuit, a step-down circuit, a filter clamping circuit, a trigger circuit and a field effect transistor, wherein the input circuit, the step-down circuit and the filter clamping circuit are sequentially connected with the AC power supply, the trigger circuit is used for providing constant and stable voltage, and the field effect transistor is connected with the trigger circuit. The double-coil structure type electromagnet comprises an exciting coil and a holding coil which are connected in series, the field effect transistor is connected with the holding coil in parallel, and the output end of the input circuit is connected with the exciting coil. Compared with the prior art, the invention has the advantages of reduced temperature rise, prolonged service life and the like.

Description

technical field [0001] The invention relates to the technical field of electrical braking, in particular to an excitation start-up power board based on a double-coil structure type single push electromagnet. Background technique [0002] Existing electromagnet excitation power supply, most of which use rectified full-wave and rectified half-wave output DC voltage level changes to complete the excitation start and maintain the state of maintenance. Part of the use of full-wave output high-voltage excitation, the principle of crystal switching power supply to achieve low-voltage maintenance voltage. The above method has certain limitations. The previous method holds the voltage at 50% of the full voltage. After the electromagnet is excited, a lower percentage of the holding voltage is allowed. Due to the limitation of the full-wave output power requirements, the holding voltage can only be Within this range, the conditions for reducing the temperature rise are also limited, a...

AI Technical Summary

Problems solved by technology

The above methods have certain limitations. The previous method holds the voltage at 50% of the full voltage. After the electromagnet is excited, a lower percentage of the holding voltage is allowed. Limited by the requirement of the full-wave output power, the holding voltage can only be at In this range, the conditions for reducing the temperature rise are also limited, and reducing the temperature rise is the key to prolonging the life of the electromagnet.

The latter method can achieve extremely low holding voltage and effectively reduce temperature rise, but the switching power supply is bulky and the load capacity is small

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