CN103036207B - Electronic control type fan of outer rotor overvoltage protection alignment circuit and over-voltage protection method - Google Patents
Electronic control type fan of outer rotor overvoltage protection alignment circuit and over-voltage protection method Download PDFInfo
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- CN103036207B CN103036207B CN201210502268.6A CN201210502268A CN103036207B CN 103036207 B CN103036207 B CN 103036207B CN 201210502268 A CN201210502268 A CN 201210502268A CN 103036207 B CN103036207 B CN 103036207B
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Abstract
The present invention relates to a kind of overvoltage protection alignment circuit and over-voltage protection method of electronic control type fan of outer rotor, comprise and hand over direct power-switching circuit, isolation characteristic alignment circuit, overvoltage crowbar and intelligent power control module, described overvoltage crowbar is by resistance R1, R2, R3, comparator chip III and direct current brushless motor logical drive chip are formed, R1, R2 one end also connects comparator chip III signal input part, another termination Vs of R1, R2 other end ground connection, comparator chip III signal output part connects Res end and R3 one end of direct current brushless motor logical drive core, the Vreg end of another termination direct current brushless motor logical drive core of R3, rotating speed control port in direct current brushless motor logical drive chip connects the signal output part of optocoupler I in isolation characteristic alignment circuit, direct current brushless motor logical drive chip signal exports the signal input part of termination Intelligent Power Module and direct current brushless motor.
Description
Technical field
The present invention relates to and a kind ofly can avoid reverse voltage that the back electromotive force of blower fan own produces to the overvoltage protection alignment circuit of a kind of electronic control type fan of outer rotor that intelligent power control module is damaged and over-voltage protection method, belong to outer rotor blower fan alignment circuit manufacture field.
Background technology
CN102312847A, title " integrated centrifugal fan that a kind of position-sensor-free drives ", under-voltage and over-voltage detection circuit is the method adopting large resistive isolation, by a simple discharge circuit, busbar voltage is converted into the analog signal of control chip input, realize under-voltage and overvoltage detection, this amplifier be input as busbar voltage, input resistance is got very large, feedback resistance is very little, thus make the input voltage of actual amplifier pin be not very large, the electric current flow through is also very little, the effect achieving isolation also achieves the detection of voltage simultaneously, counter electromotive force detection circuit is a low pass filter, " terminal voltage method " is adopted to realize sensorless strategy, by the process of the voltage to earth to motor three-phase UVW, obtain rotor-position signal, motor three-phase voltage is first by low pass filter filtering high-frequency interferencing signal and step-down, direct current component is removed again by electric capacity, then the signal processed and the dummy neutral voltage that constructed by three-phase are compared, thus obtain the signal of back electromotive force zero-crossing, through detecting electric current, rotating speed, duty ratio, busbar voltage and the parameter of electric machine determine that the deviation angle that electric current afterflow affects compensates, make the commutation moment close to the best commutation moment, guarantee correctly carrying out of commutation.Its weak point: the DC brushless external rotor blower fan not being suitable for the input of the application's AC power.
Summary of the invention
Purpose of design: design a kind of can avoid the back electromotive force of blower fan own produce reverse voltage to the overvoltage protection alignment circuit of a kind of electronic control type fan of outer rotor that intelligent power control module is damaged and over-voltage protection method.
Design: the external rotor electronic of the application controls the direct current brushless motor that blower fan is AC power input.This blower interior uses permanent magnet, and when blower fan exists back electromotive force in rotary course, when blower fan normally works, the VS voltage of intelligent power control module end is direct voltage after rectification.When rotation speed of fan is from a high speed to low speed adjustment process, because the inertia of wind wheel itself, cause the actual speed of blower fan higher than the theoretical rotational speed of the control chip of blower fan, the back electromotive force of blower fan itself produce reverse voltage be added to intelligent power control module end VS place itself rectification after on direct voltage, there is linear relationship in the inertia of the size of reverse voltage and the maximum speed of blower fan and wind wheel, namely rotating speed is higher, inertia is larger, and reverse voltage is higher.After the VS place voltage of intelligent power control module end after superposition is higher than power model maximum working voltage, then power model is easily damaged.The application is on the basis of the existing rotating speed alignment circuit of outer rotor blower fan for this reason, voltage detection circuit is utilized to detect the VS voltage of intelligent power control module end in real time, when the VS voltage of intelligent power control module end raises, comparator chip III signal input part A point voltage also increases, when VS voltage is increased to set point, comparator chip III signal input part A point voltage reaches after voltage reaches comparator chip III conducting voltage, direct current brushless motor logical drive chip RES terminal voltage is made to become low level, the drive singal of direct current brushless motor logical drive chip immediately required for switch-off power module, the winding of blower fan utilization itself consumes U1 to be made it to reduce until identical with direct voltage after direct current, realize Overvoltage Protection.
Technical scheme 1: a kind of overvoltage protection alignment circuit of electronic control type fan of outer rotor, comprise and hand over direct power-switching circuit, isolation characteristic alignment circuit, overvoltage crowbar and intelligent power control module, described overvoltage crowbar is by resistance R1, R2, R3, comparator chip III and direct current brushless motor logical drive chip are formed, R1, R2 one end also connects comparator chip III signal input part, another termination Vs of R1, R2 other end ground connection, comparator chip III signal output part connects Res end and R3 one end of direct current brushless motor logical drive core, the Vreg end of another termination direct current brushless motor logical drive core of R3, rotating speed control port in direct current brushless motor logical drive chip connects the signal output part of optocoupler I in isolation characteristic alignment circuit, direct current brushless motor logical drive chip signal exports the signal input part of termination Intelligent Power Module and direct current brushless motor.
Technical scheme 2: a kind of overvoltage detection protecting method of outer rotor blower fan alignment circuit, voltage detection circuit is utilized to detect the VS voltage of intelligent power control module end in real time, when the VS voltage of intelligent power control module end raises, comparator chip III signal input part A point voltage also increases, when the VS voltage of intelligent power control module end is increased to set point, after comparator chip III signal input part A point voltage reaches reference voltage, after comparator chip III conducting voltage, direct current brushless motor logical drive chip RES terminal voltage is made to become low level, the drive singal of direct current brushless motor logical drive chip immediately required for switch-off power module, the winding of blower fan utilization itself consumes U1, make it to reduce until identical with direct voltage after direct current, realize Overvoltage Protection.
The present invention is compared with background technology, and the design of excess voltage protection, fundamentally avoids the reverse voltage of the back electromotive force generation of blower fan own to the damage of intelligent power control module.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the overvoltage protection alignment circuit of electronic control type fan of outer rotor.
Embodiment
Embodiment 1: with reference to accompanying drawing 1.A kind of overvoltage protection alignment circuit of electronic control type fan of outer rotor, comprise and hand over direct power-switching circuit, isolation characteristic alignment circuit, overvoltage crowbar and intelligent power control module, hand over AC/DC in direct power-switching circuit to convert chip 0 and input the direct current of termination after AC-DC conversion and capacitor filtering, AC/DC converts chip 0 and exports termination, in described isolation characteristic alignment circuit insulating power supply input, in isolation characteristic alignment circuit, the power output end of insulating power supply exports+10V power supply, the earth terminal GND2 of insulating power supply connects operational amplifier chip I earth terminal, the earth terminal of comparator chip II, the signal output part of optocoupler II, electric capacity C1 negative pole, diode D1 negative pole, electric capacity C1 positive pole connects the signal input part of operational amplifier chip I, electric capacity C1 two ends connecting resistance R5, R5 one end is connected with the signal input part of resistance R4 one end and operational amplifier chip I, the R4 other end is speed controling signal input.Diode D1 positive pole switches through fast output or diode D1 positive pole switches through fast output by resistance R6.The signal input part of optocoupler II connects FG signal end, the signal termination Intelligent Power Module signal input part of insulating power supply, integrated 6 IGBT or MOSFET of Intelligent Power Module and door driving chip are in the chip of one, and Intelligent Power Module exports the signal input part of termination direct current brushless motor; The signal output part of operational amplifier chip I connects the signal input part of comparator chip II, the signal output part of comparator chip II connects the signal input part of optocoupler I, the signal output part of optocoupler I connects direct current brushless motor logical drive chip signal input, and direct current brushless motor logical drive chip signal exports the signal input part of termination Intelligent Power Module and direct current brushless motor.Described overvoltage crowbar is by resistance R1, R2, R3, comparator chip III and direct current brushless motor logical drive chip are formed, R1, R2 one end also connects comparator chip III signal input part, another termination Vs of R1, R2 other end ground connection, comparator chip III signal output part connects Res end and R3 one end of direct current brushless motor logical drive core, the Vreg end of another termination direct current brushless motor logical drive core of R3, rotating speed control port in direct current brushless motor logical drive chip connects the signal output part of optocoupler I in isolation characteristic alignment circuit, direct current brushless motor logical drive chip signal exports the signal input part of termination Intelligent Power Module and direct current brushless motor.Direct current brushless motor logical drive chip is provided with FG interface and is connected with the signal input part FG of optocoupler II.
Embodiment 2: on the basis of embodiment 1, a kind of overvoltage detection protecting method of outer rotor blower fan alignment circuit, voltage detection circuit is utilized to detect the VS voltage of intelligent power control module end in real time, when the VS voltage of intelligent power control module end raises, comparator chip III signal input part A point voltage also increases, when the VS voltage of intelligent power control module end is increased to set point, after comparator chip III signal input part A point voltage reaches reference voltage, after comparator chip III conducting voltage, direct current brushless motor logical drive chip RES terminal voltage is made to become low level, the drive singal of direct current brushless motor logical drive chip immediately required for switch-off power module, the winding of blower fan utilization itself consumes U1, make it to reduce until identical with direct voltage after direct current, realize Overvoltage Protection.
It is to be understood that: although above-described embodiment to be contrasted detailed text description to mentality of designing of the present invention; but these text descriptions; just the simple text of mentality of designing of the present invention is described; instead of the restriction to mentality of designing of the present invention; any do not exceed mentality of designing of the present invention combination, increase or amendment, all fall within the scope of protection of the present invention.
Claims (2)
1. the overvoltage protection alignment circuit of an electronic control type fan of outer rotor, comprise and hand over straight power-switching circuit, isolation characteristic alignment circuit, overvoltage crowbar and intelligent power control module, it is characterized in that: described overvoltage protection alignment circuit is by resistance R1, R2, R3, comparator chip III and direct current brushless motor logical drive chip are formed, R1, R2 one end also connects comparator chip III signal input part, direct voltage VS after another termination rectification of R1, R2 other end ground connection, comparator chip III signal output part connects Res end and R3 one end of direct current brushless motor logical drive chip, the Vreg end of another termination direct current brushless motor logical drive chip of R3, rotating speed control port in direct current brushless motor logical drive chip connects the signal output part of optocoupler I in isolation characteristic alignment circuit, direct current brushless motor logical drive chip signal exports the signal input part of termination Intelligent Power Module and direct current brushless motor, the overvoltage detection protecting method of its outer rotor blower fan alignment circuit: utilize voltage detection circuit to detect the VS voltage of intelligent power control module end in real time, when the VS voltage of intelligent power control module end raises, comparator chip III signal input part A point voltage also increases, when the VS voltage of intelligent power control module end is increased to set point, after comparator chip III signal input part A point voltage reaches reference voltage, after comparator chip III conducting voltage, direct current brushless motor logical drive chip RES terminal voltage is made to become low level, direct current brushless motor logical drive chip turns off the drive singal required for intelligent power control module immediately, the winding of blower fan utilization itself consumes U1, make it to reduce until identical with direct voltage after rectification, realize Overvoltage Protection.
2. the overvoltage protection alignment circuit of electronic control type fan of outer rotor according to claim 1, is characterized in that: direct current brushless motor logical drive chip is provided with FG interface and is connected with the signal input part FG of optocoupler II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502268.6A CN103036207B (en) | 2012-11-30 | 2012-11-30 | Electronic control type fan of outer rotor overvoltage protection alignment circuit and over-voltage protection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210502268.6A CN103036207B (en) | 2012-11-30 | 2012-11-30 | Electronic control type fan of outer rotor overvoltage protection alignment circuit and over-voltage protection method |
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| Publication Number | Publication Date |
|---|---|
| CN103036207A CN103036207A (en) | 2013-04-10 |
| CN103036207B true CN103036207B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210502268.6A Active CN103036207B (en) | 2012-11-30 | 2012-11-30 | Electronic control type fan of outer rotor overvoltage protection alignment circuit and over-voltage protection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116780945A (en) * | 2023-06-08 | 2023-09-19 | 青岛云集控制技术有限公司 | Motor controller of fresh air system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6256181B1 (en) * | 1998-06-25 | 2001-07-03 | Matsushita Electric Industrial Co., Ltd. | Fan drive device |
| CN1334985A (en) * | 1999-11-29 | 2002-02-06 | 三菱电机株式会社 | Inverter controller |
| CN2580703Y (en) * | 2002-10-28 | 2003-10-15 | 广东南方通信集团公司 | Card-insertion and bar-code type public telephone equipment |
| CN201781455U (en) * | 2009-12-13 | 2011-03-30 | 华南理工大学 | Direct current brushless motor control-driven circuit and direct current brushless motor having the same |
| CN202978255U (en) * | 2012-11-30 | 2013-06-05 | 杭州顿力电器有限公司 | Outer rotor electronic control type fan overvoltage protection circuit |
-
2012
- 2012-11-30 CN CN201210502268.6A patent/CN103036207B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6256181B1 (en) * | 1998-06-25 | 2001-07-03 | Matsushita Electric Industrial Co., Ltd. | Fan drive device |
| CN1334985A (en) * | 1999-11-29 | 2002-02-06 | 三菱电机株式会社 | Inverter controller |
| CN2580703Y (en) * | 2002-10-28 | 2003-10-15 | 广东南方通信集团公司 | Card-insertion and bar-code type public telephone equipment |
| CN201781455U (en) * | 2009-12-13 | 2011-03-30 | 华南理工大学 | Direct current brushless motor control-driven circuit and direct current brushless motor having the same |
| CN202978255U (en) * | 2012-11-30 | 2013-06-05 | 杭州顿力电器有限公司 | Outer rotor electronic control type fan overvoltage protection circuit |
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| CN103036207A (en) | 2013-04-10 |
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