An electromagnet driving circuit
A driving circuit and electromagnet technology, which is applied in the direction of electromagnets and electromagnets with armatures, can solve the problems of severe heating of electromagnet L1, large driving current, long-term energization of electromagnet L1, etc., and achieve the effect of avoiding long-term energization
Active Publication Date: 2016-04-20
GRG BAKING EQUIP CO LTD
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Problems solved by technology
[0004] When the microcontroller 001 crashes due to abnormal interference, or the microcontroller 001 needs to set a breakpoint to pause during software debugging, so that the microcontroller 001 cannot effectively control the switch tube V1, it may keep the switch tube V1 in the ON state. state, resulting in long-term energization of the electromagnet L1
After the electromagnet L1 is energized, the driving current is relatively large, which causes the electromagnet L1 to heat up very badly, so the long-term energization of the electromagnet L1 may cause the electromagnet L1 to burn out
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] Such as figure 2 As shown, a schematic diagram of an electromagnet driving circuit disclosed in an embodiment of the present invention includes:
[0025] One end is connected to the resistance unit R4 of the first power supply Vcc1, and the other end of the resistance unit R4 is connected to the third resistance R3;
[0026] One end is connected to the capacitance unit C1 of the common end of the resistance unit R4 and the third resistance R3, and the othe...
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The invention discloses an electromagnet drive circuit. The electromagnet drive circuit comprises a resistor unit, a capacitor unit and a diode unit. One end of the resistor unit is connected with a first power supply of the electromagnet drive circuit, and the other end of the resistor unit is connected with a third resistor of the electromagnet drive circuit; one end of the capacitor unit is connected with a common end of the resistor unit and the third resistor, and the other end of the capacitor unit is connected with a control end of a drive tube of the electromagnet drive circuit; and an anode of the diode unit is connected with a common end of the capacitor unit and the drive tube, and a cathode of the diode unit is connected with a first power supply. According to the electromagnet drive circuit, the resistor unit, the capacitor unit and the diode unit are added on the basis of a prior electromagnet drive circuit, so that after the capacitor unit is fully charged, the drive tube can still maintain an off state even if a switching tube is in an on state, and an automatic electromagnet power-off effect is achieved.
Description
technical field [0001] The present invention relates to the technical field of drive circuits, more specifically, to an electromagnet drive circuit. Background technique [0002] Traditional electromagnet drive circuits such as figure 1 As shown, it includes: a control circuit 01 and a drive circuit 02. The control circuit 01 includes: a second power supply Vcc2, a first resistor R1, a second resistor R2 and a microcontroller 001; the drive circuit 02 includes: a first power supply Vcc1, a third Resistor R3, switch tube V1, drive tube V2, first diode V3 and electromagnet L1; first resistor R1 and second resistor R2 are connected in series between the second power supply Vcc2 and the control terminal of switch tube V1, and the microcontroller 001 is connected to the common end of the first resistor R1 and the second resistor R2, and the microcontroller 001 can output a control signal to control the turn-on and turn-off of the switch tube V1. The input terminal of the drivin...
Claims
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IPC IPC(8): H01F7/18
Inventor 黎明
Owner GRG BAKING EQUIP CO LTD