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Fan power supply circuit

A power supply circuit and fan technology, applied in data processing power supply, liquid/fluid solid measurement, climate sustainability, etc., can solve the problems of circuit failure, high rated current, expensive price, etc., and achieve the effect of preventing burnout

Inactive Publication Date: 2014-12-17
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used fan power supply circuit usually includes a capacitor and a fan motor coil. When the fan is started, the capacitor generates a large starting current, which will cause a great impact on the components in the circuit, such as transistors. If the current is too large, the transistor may be burned and the circuit will fail
And if you want to improve the reliability of the circuit, you need to use relatively expensive transistors with high rated current, which will increase the cost

Method used

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Embodiment Construction

[0021] see figure 1 and figure 2 , in a preferred embodiment of the present invention, a fan power supply circuit includes a power supply module 20, a filter circuit 30, a power control circuit 50, a signal control switch 60, a PWM (Pulse Width Modulation, pulse width modulation) generator 70 and a charging and discharging circuit 80. The power supply module 20 is used to supply power to a fan 90 . The filter circuit 30 is connected to the power supply module 20 and is used for filtering the clutter signal of the power supply input to the power supply module 20 . The signal control switch 60 is connected to the filter circuit 30 and the power control circuit 50 for controlling the power input of the power control circuit 50 . The PWM generator 70 is connected to the signal control switch 60 for controlling the intermittent conduction of the signal control switch 60 , so as to realize the intermittent power input of the power control circuit 50 . The charging and dischargi...

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Abstract

A fan power supply control system includes a power supply module, a power control circuit, a signal control circuit, a PWM generator. The power supply is adapted to input a power signal to a fan. The power control circuit is between the power supply module and the fan and adapted to connect or disconnect the power supply module to the fan. The signal control circuit is connected the power supply module to the power control circuit and adapted to switch on or off the power control circuit. The PWM generator is adapted to generate a predetermined cycle square signal according to the power signal, to intermittently switch on or off the signal control circuit, and a switch on / off state of the power control circuit is synchronous with the signal control circuit.

Description

technical field [0001] The invention relates to the field of fan power supply, in particular to a fan power supply circuit. Background technique [0002] With the continuous development of computer technology, especially the continuous improvement of the frequency of the central processing unit (CPU, Center Processor Unit), the heat generated during its work is also increasing. Heat dissipation devices such as fans are added to the processor. However, if the fan cannot operate normally or stops, the heat generated by the central processing unit cannot be dissipated in time, and in severe cases, the central processing unit will be damaged. Therefore, whether the fan can operate normally is related to whether the computer system can work normally, and the fan power supply circuit determines whether the fan can operate normally and stably, so the quality of the fan power supply circuit design directly affects whether the fan and even the computer system can work normally and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/26
CPCF04D19/002F04D27/004Y02B30/70
Inventor 潘卫国程敦洪李小刚李茂昌
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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