Shock resisting under-voltage release device and method

Abstract

The invention provides a shock resisting under-voltage release device. The shock resisting under-voltage release device is mainly composed of an accelerated speed detecting circuit, a voltage sample collecting circuit, a central processing unit (CPU), a pulse-width modulation (PWM) circuit, an electromagnet and a working power supply circuit. The CPU obtains power supply voltages through the voltage collecting circuit and an accelerated speed through the accelerated speed detecting circuit and controls attachment of the electromagnet or keeps the electromagnet in the state of attachment through PWM currents of different impulse widths generated by the PWM circuit. The invention further provides a shock resisting method of the under-voltage release device. The under-voltage release device has the advantages of being small in size, simple in structure, little in generated heat, impact and vibration resistant and the like. With the shock resisting method of the under-voltage release device, the under-voltage release device can effectively resist impact and vibration on a frame-type low-voltage breaker of a boat.

Description

technical field [0001] The invention relates to an anti-impact undervoltage release and an anti-impact method using the undervoltage release. Background technique [0002] The frame-type low-voltage circuit breaker used on ships has the following regulations: when the power supply voltage of the low-voltage circuit breaker is equal to or greater than 85%, it should be able to ensure that the circuit breaker is closed; Within the range, the undervoltage release should operate. When the electromagnet of the undervoltage release pulls in, a large current is required to overcome the elastic force of the spring, and after the pull-in is completed, only a small holding current is needed to maintain the electromagnet to maintain the pull-in position. If a higher current is passed in, the solenoid coil will heat up and be damaged, so current limiting is required. At the same time, when a ship is sailing on the sea, it is often subject to strong shock vibration. Under the high acce...

AI Technical Summary

Problems solved by technology

At the same time, when a ship is sailing on the sea, it is often subject to strong shock vibration. Under the high acceleration of shock vibration, the small holding current will not be enough to maintain the electromagnet, and the electromagnet core will bounce. After the iron core leaves the pull-in position, the electromagnetic holding force decreases rapidly, which is not enough to pull the iron core back to the holding position, causing the undervoltage release to malfunction, causing the frame circuit breaker to trip and causing serious consequences

Images