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Device for controlling current and method thereof

A current control and controller technology, used in excitation or armature current control, emergency protection circuit devices, control systems, etc., can solve problems such as excessive operating current and failure to eliminate it, prolong operating life, and reduce excessive operating current. effect of state

Inactive Publication Date: 2009-09-09
DELTA ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the driving currents 114, 115 generated by the fan motor controller 11 have not decreased. When the transistors 142, 143 stop functioning, the operating current of the coil 121 will still be too large, so the operating current of the coil 121 will be too high. The big main cause still hasn't been eliminated

Method used

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  • Device for controlling current and method thereof
  • Device for controlling current and method thereof
  • Device for controlling current and method thereof

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Embodiment Construction

[0042] The current control device and method according to preferred embodiments of the present invention will be described below with reference to related drawings.

[0043] Such as figure 2 As shown, the current control device 2 of the preferred embodiment of the present invention is used for the fan motor 3 . The current control device 2 includes a current sampling module 21 , a signal generation module 22 , a current detection module 23 and a current control module 24 .

[0044] The current sampling module 21 measures the operating current S of the fan motor 3 31 To generate the sampling current signal S 21 , where the operating current S 31 According to the driving signal S 24 And control, the signal generation module 22 generates the threshold current signal S 22 , the current detection module 23 receives the sampled current signal S 21 with the threshold current signal S 22 , and according to the threshold current signal S 22 Detect the sampling current signal S...

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Abstract

The invention relates to a device for controlling current, which is used for a fan electromotor. The device comprises a current sampling module, a signal generation module, a current detection module and a current control module. The current sampling module is used for measuring the operating current of the fan electromotor to generate a sampling current signal, wherein, the operating current is controlled by a driving signal, the signal generation module generates a threshold current signal, the current detection module receives the sampling current signal and the threshold current signal and detects the sampling current signal according to the threshold current signal to generate an electric motor guard signal, the current control module receives the electric motor guard signal, and stops generating or reduces the driving signal according to the electric motor guard signal.

Description

[0001] This application is a divisional application of the Chinese patent application with the application number 200510102882.3, the application date is September 14, 2005, and the invention title is "current control device and method". technical field [0002] The invention relates to a current control device, in particular to a current control device for controlling motor current. Background technique [0003] Motors are widely used in fans or various electronic devices. However, if the operating current of the motor is too high for a long time, it is easy to be damaged. [0004] Such as figure 1 As shown, the fan motor controller 11 generates driving currents 112 - 115 according to the speed control signal 111 . The fan motor 12 includes a coil 121 and several transistors 122-125, and each of the driving currents 112-115 is input to each of the transistors 122-125 to control the operating current of the coil 121. The input voltage V cc It is electrically connected to ...

Claims

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Application Information

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IPC IPC(8): H02P7/00H02P7/06H02H7/08
Inventor 郭柏村马文川蔡明熹黄文喜
Owner DELTA ELECTRONICS INC
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