Novel low-voltage electric motor protection and electric-dazzling prevention apparatus and control method therefor
An anti-shake electric and motor technology, applied in emergency protection circuit devices, circuit devices, electrical components, etc., can solve the problems of power supply system swaying, easy to burn out the motor, affecting safety and stability, etc.
Active Publication Date: 2016-03-23
JIANGSU STATE GRID AUTOMATION TECH
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Problems solved by technology
[0002] During the use of the motor, due to the instability of the power supply system, the phenomenon of shaking electricity will occur, causing the contactor in the control voltage circuit to be released suddenly during operation, and when the control voltage output by the power supply system returns to normal, all the motors will suddenly restart together , the voltage at the moment of restart is large, it is easy to burn out the motor, and seriously affects the safety and stability, bringing economic losses and safety hazards to the enterprise
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[0056] The present invention will be further described below in conjunction with specific embodiments.
[0057] see Figure 1 to Figure 6 As shown, the present invention provides a new type of low-voltage motor protection and anti-sway device, including anti-sway circuit 1, management circuit 2, protection and restart circuit 3 and display circuit, the anti-sway circuit 1, protection and The restart circuit 3 and the display circuit are respectively connected with the management circuit 2, the output end of the anti-shake point circuit is connected with a contactor, the contactor is connected with a control voltage circuit, the control voltage circuit is connected with a motor, and the The management circuit 2 includes a central processing unit including a microprocessor and peripheral circuits.
[0058] Wherein, the anti-shake electric circuit 1 includes a first switching protection circuit, a switching circuit, a first energy storage circuit 101, a boost circuit and a half-...
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The present invention discloses a novel low-voltage electric motor protection and electric-dazzling prevention apparatus and a control method therefor. An electric motor protection circuit comprises an electric-dazzling prevention circuit, a management circuit, a protection and restart circuit and a display circuit; an output end of the electric-dazzling circuit is connected to a contactor; the contactor is connected to a control voltage circuit; the control voltage circuit is connected to an electric motor; and the management circuit comprises a central processing unit. The electric-dazzling circuit provided by the present invention is capable of switching on a direct current power source when electric-dazzling happens to a power supply system, so as to hold the contactor in a pull-in state and prevent operation of the electric motor from being stopped due to instantaneous electric-dazzling; and The management circuit is capable of acquiring operating state information of the electric motor and controlling operation of the protection and restart circuit according to the operating state information; and the protection and restart circuit is capable of controlling disconnection and connection of the contactor, disconnecting the electric motor when a control voltage is low or disengaged, and automatically restarting the electric motor when the control voltage recovers to normal.
Description
technical field [0001] The invention relates to a novel low-voltage motor protection and anti-shaking device and a control method thereof. Background technique [0002] During the use of the motor, due to the instability of the power supply system, there will be a shock phenomenon, which will cause the contactor in the control voltage circuit to be released suddenly during operation, and when the control voltage output by the power supply system returns to normal, all the motors will suddenly restart together , The voltage at the moment of restart is relatively large, which is easy to burn out the motor, and seriously affects the safety and stability, bringing economic losses and potential safety hazards to the enterprise. Therefore, it is necessary to provide a new motor protection circuit to solve the above problems. Contents of the invention [0003] The object of the present invention is to provide a new low-voltage motor protection and anti-sway device and its contro...
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IPC IPC(8): H02H7/09H02J9/06H02J3/06
Inventor 姜万东纪军伟尹小雨张晓波曲尧陈风叶
Owner JIANGSU STATE GRID AUTOMATION TECH