Motor overcurrent detection circuit

Abstract

The invention discloses a motor overcurrent detection circuit. The motor overcurrent detection circuit consists of four input / output ends, four power supply voltage ends, an optical coupler, a comparator, a transistor, a capacitor, two diodes and eleven resistors, wherein the cathode of the transmitting end of the optical coupler is connected in series with the first resistor and is connected to the input / output end; the collecting electrode of the receiving end of the optical coupler is connected with the first power supply voltage end, is connected in series with the resistors and is grounded; the transmitting electrode of the receiving end of the optical coupler is connected with the second input / output end and is connected in parallel with a pin 2 of the comparator; a pin 3 of the comparator is connected to the second power supply voltage end; the pin 3 and a pin 1 are directly bridged with the ninth resistor; both ends of the ninth resistor are connected in parallel with the second diode, and the pin 1 is connected with the third input / output end at the same time; the pin 1 of the comparator is connected with the transmitting electrode of the transistor through the eighth resistor; and the base electrode of the transistor is connected in series with the tenth resistor and is connected with the third input / output end. The motor overcurrent detection circuit has a simple structure, reliable and stable performance and high popularization and use value.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a motor overcurrent detection circuit. Background technique [0002] In the prior art, various motor over-current detection circuits can be seen everywhere, but most of them have complex structures, and the prices are relatively expensive. On the one hand, this increases the cost of the over-current detection module, and at the same time, the complexity of the structure also increases the product quality. Instability, and often in many occasions, the functional requirements for the overcurrent detection circuit are relatively low, as long as it meets a single voltage stabilization function. [0003] Contents of the invention [0004] In order to overcome the shortcomings of the prior art, the present invention provides a motor overcurrent detection circuit with simple structure and stable and reliable performance. [0005] In order to achieve the above-mentioned purpose of the inv...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, various motor over-current detection circuits can be seen everywhere, but most of them have complex structures, and the prices are relatively expensive. On the one hand, this increases the cost of the over-current detection module, and at the same time, the complexity of the structure also increases the product quality. Instability, and often in many occasions, the functional requirements for the overcurrent detection circuit are relatively low, as long as it meets a single voltage stabilization function

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