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本发明是经过改进的起重电磁铁的控制装置。起重电磁铁是自直流电源励磁的电磁铁,由正向励磁回路、反向励磁回路、放电回路以及它们的控制回路构成。就是说,电磁铁用直流电源来励磁而起重。当起重物降落时,断开正向励磁回路。为消耗电磁铁电磁能,并接有放电电阻。而且为快速消耗掉电磁铁的电磁能把励磁回路转接到反向励磁回路上。这样由于电磁铁反向励磁,又加快了起重物的降落。
The present invention is an improved control device for lifting electromagnets. The lifting solenoid is an electromagnet that is energized from a DC power source and consists of a forward excitation loop, a reverse excitation loop, a discharge loop, and their control loops. That is, the electromagnet is energized and lifted with DC power. When the lifting of the landing, disconnect the positive excitation circuit. To consume the electromagnetic energy of the electromagnet, and connected with a discharge resistor. But also to rapidly consume the electromagnetic energy of the electromagnet to transfer the excitation circuit to the reverse excitation circuit. This reversal of excitation due to the electromagnet, but also to speed up the lifting of the landing.