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Fan system, fan control circuit and fan control method

A fan control and fan technology, applied in pump control, non-variable pumps, machines/engines, etc., can solve the problems of burning control circuits and system power, energy waste, and consumption of system power

Active Publication Date: 2012-07-04
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As shown in the figure, when the fan blade switches forward and reverse, the inertia of the full rotation of the fan blade will generate a surge current Ip, which is about 1.5 times the normal starting current, so the control circuit and system may be burned power supply, and the surge current Ip will also consume system power, resulting in a waste of energy

Method used

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  • Fan system, fan control circuit and fan control method
  • Fan system, fan control circuit and fan control method
  • Fan system, fan control circuit and fan control method

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Embodiment Construction

[0028] The invention provides a fan system capable of suppressing surge current. In the embodiment of the present invention, a simple circuit can be used to reverse the fan system at full speed within a period of time after the fan system is started, so that the automatic air suction and automatic exhaust can achieve the effect of dust removal, and it does not need to be written in a software program in integrated circuits. In addition, the embodiment of the present invention also stops driving the fan when the fan has not reversed at full speed, and then drives the fan at full speed after a period of time, so as to suppress the surge current.

[0029] figure 2 It is an embodiment of the fan system of the present invention. As shown in the figure, the fan system 21 includes a fan 22 , a driver chip 23 and a fan control circuit 24 . The driving chip 23 receives a forward and reverse output signal FR and a control signal CS for driving the fan 22 . The fan control circuit 2...

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Abstract

The invention provides a fan control circuit, which comprises a positive and reverse rotation control circuit and a surge current inhibiting circuit, wherein the positive and reverse rotation control circuit outputs positive and reverse rotation output signals so that a fan rotates for a first time in the first direction and then rotates in the second direction after the second time after a power supply is started, the second time is next to the first time, the surge current inhibiting circuit generates control signals according to the positive and reverse rotation output signals, the fan driving is stopped by a driving chip at the second time, in addition, the fan is driven to rotate at full speed in the second direction after the second time, and the surge current inhibition is carried out.

Description

technical field [0001] The invention relates to a fan system, in particular to a fan control circuit with automatic dust removal and surge current suppression. Background technique [0002] Generally, the forward and reverse rotation of the fan is used for suction and exhaust to achieve the effect of automatic dust removal, such as exhaust fans, power supply fans, etc. However, although the three-phase driver chip can drive the fan to rotate forward or reverse, it cannot switch between forward and reverse during operation. In the known technology, a software program is written into an integrated circuit, such as a microcontroller unit (MCU, also called a microprocessor), to control the forward and reverse rotation of the fan, but the cost is relatively high. [0003] figure 1 It is a relation diagram of the fan current versus time to achieve the forward and reverse rotation of the fan by the known technology. As shown in the figure, when the fan blade switches forward and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/02
Inventor 刘政杰苏锦平苏德胜
Owner DELTA ELECTRONICS INC