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Fan control device

A fan control and fan technology, which is applied in the direction of pump control and starting devices, non-variable pumps, etc., can solve the problems of current overload and insufficient starting current, and achieve the effect of reducing starting current

Active Publication Date: 2008-08-20
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when starting or resetting, neither the fan 2 nor the fan control device 1 will inevitably generate such as figure 2 The start-up current shown above will cause current overload to the fan 2 or the fan control device 1, or even the equipment or circuit it is applied to
[0005] Although a current-limiting function can be added to the drive circuit 12, the current-limiting function can only slightly reduce and suppress the starting current, and this current-limiting function can only protect the semiconductor components and coils inside the fan 2, but for the applied equipment Or the circuit, the current limiting function is still not enough to reduce the starting current

Method used

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Embodiment Construction

[0034] A fan control device according to a preferred embodiment of the present invention will be described below with reference to related drawings.

[0035] Please refer to image 3 As shown, a fan control device 3 according to a preferred embodiment of the present invention is based on a control signal S CNT To control a fan 4 , the device includes a signal input unit 31 , a start protection unit 32 and a drive unit 33 .

[0036] A power signal V CC To drive the driving unit 33 to operate, a power signal V REF Driving the signal input unit 31 and the start protection unit 32 to operate.

[0037] The signal input unit 31 receives the control signal S CNT , the signal input unit 31 provides a stable operating point so that the control signal S CNT can be normally input to the drive unit 33 .

[0038] When the fan control device 3 is started or reset, the start protection unit 32 outputs a protection signal S PROT , and stop outputting the protection signal S after a per...

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PUM

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Abstract

A fan control device which controls a fan according to a control signal comprises a signal input unit, an actuation protecting unit and a driving unit. The signal input unit receives the control signal; the actuation protecting unit outputs a protecting signal and stops outputting the protecting signal after a period. The driving unit is coupled to the actuation protecting unit and the signal input unit in order to receive the protecting signal and the control signal. The protecting signal restrains the current for driving the fan by the driving unit in this period, and the control signal controls the driving of the fan by the driving unit after the period.

Description

technical field [0001] The invention relates to a control device, in particular to a fan control device. Background technique [0002] Fans are commonly used in today's electronic devices to provide heat dissipation or air conduction mechanisms. [0003] Such as figure 1 As shown, the existing fan control device 1 receives a control signal S CNT To control the speed of fan 2. The fan control device 1 includes an input circuit 11 and a drive circuit 12, the input circuit 11 receives the control signal S CNT , the input circuit 11 provides a stable operating point so that the control signal S CNT can be correctly input to the driving circuit 12, and the driving circuit 12 according to the control signal S CNT To control the speed of the fan 2. [0004] However, when starting or resetting, neither the fan 2 nor the fan control device 1 will inevitably generate such as figure 2 The startup current shown above will cause current overload to the fan 2 or the fan control de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/04H02P6/20F04D27/00
Inventor 邓文平刘铭龙吴嘉煌刘政杰
Owner DELTA ELECTRONICS INC