Operation control circuit of fan set

Abstract

The invention relates to an operation control circuit of a fan set, comprising a master control fan unit, at least one slave control fan and at least one signal conversion interface circuit, wherein the master control fan unit is provided with a micro-controller unit (MCU) and a master control fan, the micro-controller unit can generate a single control signal to control the operation of the master control fan and the at least one slave control fan, the single control signal can generate a complementary control signal through the complementary conversion of the at least one signal conversion interface circuit, the complementary control signal is transmitted to the slave control fan or part of the slave control fans, and therefore, the slave control fan and the master control fan are in reverse logic operation states. The invention is used for solving the problems of circuit arrangement cost increase, calculation and wiring complexity increase and the like existing in the traditional operation control circuit.

Description

technical field [0001] The present invention relates to an operation control circuit of a fan group, in particular to an operation control circuit capable of controlling many fans by utilizing a few signal output ends. Background technique [0002] In recent years, due to the rapid development of microcontroller technology, the control of motors has broken through the shortcomings of limited functions, increased circuit complexity, and increased circuit area caused by only using analog circuit design in the past. [0003] Such as figure 1 As shown, it discloses an operation control circuit of an existing fan group, including a microcontroller 91 and several fans 92 . The microcontroller 91 is connected to a power supply VCC and a ground wire, and each of the fans 92 is commonly connected to another power supply V+ and a ground wire. The controller 91 and the required power circuits of the fans 92 . The microcontroller 91 has several control terminals 911 in addition, whic...

AI Technical Summary

Problems solved by technology

[0004] However, in general, the above-mentioned existing circuit has the following disadvantages, for example: since each fan 92 is controlled by each control terminal on the microcontroller 91 911, that is to say, the number of the control terminals 911 must be equal to or greater than the number of settings of the fans 92, so if the number of controlled fans 92 increases, the microcontroller 91 with more control terminals 911 must be selected for use. Increase the manufacturing cost of the existing operation control circuit (generally speaking, if the number of control terminals 911 of the microcontroller 91 is more, its price is higher)

What's more, if the increased number of the fans 92 is too large, even additional microcontrollers need to be added to meet the above-mentioned control requirements; moreover, since each fan 92 is connected to the microcontroller 91 Each control terminal 911 will increase the complexity of the control circuit, causing inconvenience on the circuit wiring; in addition, since the microcontroller 91 must utilize each of the control terminals 911 to control each of the fans 92 correspondingly, the microcontroller 91 must Signal processing is first performed to generate several control signals to be sent to the several fans 92, and then the several control terminals 911 output the several control signals respectively, resulting in the microcontroller 91 having to bear a huge amount of computation

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