Moment protection device of crane motor and monitoring control method thereof
A technology of motor torque and protection device, applied in emergency protection circuit device, computer control, program control and other directions, can solve the problems of equipment and personal safety threats, low control sensitivity, complicated control circuit, etc., and achieve important social benefits and economic value. , The control sensitivity is high, and the effect of avoiding the loss of control of heavy objects
Active Publication Date: 2013-07-31
ANGANG STEEL CO LTD
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Problems solved by technology
[0002] The existing motor torque monitoring protectors usually use general voltage transformers or current transformers to sample signals, and use analog circuits for control. The disadvantages of this control method are: the analog circuit signal is complex to build, and the sampling signal accuracy is not high. Its accuracy is only 2V; and the control circuit is complicated, large in size, high in cost and low in control sensitivity
Therefore, from time to time, due to the defect or failure of the control system, the heavy objects are out of control, which may cause serious threats to equipment and personal safety, or cause major equipment damage and casualties, causing disastrous consequences to the country and enterprises. due loss
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Embodiment Construction
[0015] The present invention will be further described below in conjunction with accompanying drawing.
[0016] Depend on figure 1 It can be seen that the crane motor torque monitoring and protection device of the present invention is mainly composed of five parts: sampling circuit 1, amplifier circuit 2, gear signal circuit 3, single-chip circuit 4 and output circuit 5. The sampling circuit 1 is connected to the amplifying circuit 2, and the amplifying circuit 2 is connected to the single-chip microcomputer circuit 4; meanwhile, the front input end of the single-chip microcomputer circuit 4 is also connected to the gear signal circuit 3, and the output end is connected to the output circuit 5.
[0017] figure 2 The five parts delineated by the five dotted boxes in the figure are the sampling circuit 1, the amplifier circuit 2, the gear signal circuit 3, the single-chip microcomputer circuit 4 and the output circuit 5 respectively. Each phase of the three-phase sampling cir...
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The invention relates to a moment protection device of a crane motor and a monitoring control method thereof. The moment protection device comprises a sampling circuit, an amplifying circuit, a gear signal circuit, a singlechip control circuit and an output circuit, wherein the input end of the sampling circuit is connected with a Hall voltage transformer and a current transformer and the output end is connected with the amplifying circuit, and the amplifying circuit is connected with the singlechip control circuit; and a gear signal enters a singlechip after being processed, and the output circuit connected with the singlechip control circuit divides the signal output into failure indication and failure output. Because signals are collected through the Hall voltage transformer and the current transformer and processed through the singlechip, the moment protection device has the advantages of high sampling and control sensitivity, safety, reliability, simple structure and low production cost, can effectively monitor and protect the motor in real time, and avoids weight out of control caused by the defects of a control system.
Description
technical field [0001] The invention belongs to the field of electrical equipment, and in particular relates to a protection device for a motor torque of a crane and a monitoring and controlling method thereof. Background technique [0002] The existing motor torque monitoring protectors usually use general voltage transformers or current transformers to sample signals, and use analog circuits for control. The disadvantages of this control method are: the analog circuit signal is complex to build, and the sampling signal accuracy is not high. Its accuracy is only 2V; and the control circuit is complicated, large in size, high in cost and low in control sensitivity. Therefore, from time to time, due to the defect or failure of the control system, the heavy objects are out of control, which may cause serious threats to equipment and personal safety, or cause major equipment damage and casualties, causing disastrous consequences to the country and enterprises. Due loss. Inve...
Claims
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IPC IPC(8): H02H7/08G05B19/042
Inventor 刘治勇唐儒兵董武家黄宝新梁宏丽王琳王洪斌
Owner ANGANG STEEL CO LTD