CN103382945A - Fan control system - Google Patents
Fan control system Download PDFInfo
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- CN103382945A CN103382945A CN2013102848311A CN201310284831A CN103382945A CN 103382945 A CN103382945 A CN 103382945A CN 2013102848311 A CN2013102848311 A CN 2013102848311A CN 201310284831 A CN201310284831 A CN 201310284831A CN 103382945 A CN103382945 A CN 103382945A
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Abstract
The invention relates to the communication technology and provides a fan control system so as to solve the problem that the fan control system is not stable, which is caused by interaction of the supply voltage. The fan control system comprises a fan control unit, a fan unit, a power supply and a signal transmission isolating device, wherein the power supply is connected with the fan control unit and the fan unit respectively and used for supplying power to the fan control unit and the fan unit; one end of the signal transmission isolating device is connected with the fan control unit, and the other end thereof is connected with the fan unit, and the signal transmission isolating device is used for performing electric isolation between the fan control unit and the fan unit; the fan control unit is separated from the reference ground of the fan unit.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of fan control system.
Background technique
Pulse duration modulation (Pulse Width Modulation, PWM) fan control system is to change by PWM the rotating speed that pulse width is controlled fan.Usually the PWM fan control system is to be made of fan control unit, fan unit and power supply three parts, wherein, fan control unit and fan unit are all to adopt positive supply to power, and fan control unit and fan unit are altogether, namely adopt same as ground.
Wherein, a kind of structural drawing of PWM fan control system as shown in Figure 1.Fan control unit and fan unit adopt same as ground GND altogether.But, adopt such scheme to make fan control unit and fan unit be easy to interact, cause fan control system unstable.
For example, the supply voltage of fan control unit is 3.3V, the supply voltage of fan unit is 12V, therefore when fluctuation appears in the supply voltage of fan unit, will the supply voltage of fan control unit be impacted, because the supply voltage of fan control unit is less, the impact that therefore is subject to is larger, the fluctuation that supply voltage even may occur is excessive and affect the situation of the normal operation of fan control unit, and then causes fan control system unstable.
Summary of the invention
The embodiment of the present invention provides a kind of fan control system, causes the unsettled problem of fan control system to solve because supply voltage interacts.
In order to address the above problem, the embodiment of the invention discloses a kind of fan control system, comprising:
Fan control unit, fan unit, power supply and signal transmission isolation mounting;
Wherein: described power supply connects respectively described fan control unit and fan unit, is used to the power supply of described fan control unit and fan unit;
Described signal transmission isolation mounting one end connects described fan control unit, and the other end connects described fan unit, is used for carrying out the electrical isolation between described fan control unit and fan unit;
Separate to the reference of described fan control unit and fan unit.
Optionally, described system also comprises: interface adapter; Described interface adapter one end connects described signal transmission isolation mounting, and the other end connects described fan unit; Described interface adapter is used for the signal that adaptive described signal transmission isolation mounting transmits with described fan unit when carrying out electrical isolation.
Optionally, described signal transmission isolation mounting comprises: first signal transmission isolation mounting and secondary signal transmission isolation mounting, and described fan unit comprises pulse interface and rotating speed interface; Described first signal transmission isolation mounting one end connects described fan control unit, the other end connects the pulse interface of described fan unit, be used for transmitting described fan control unit to the pulse signal of described pulse interface output, and isolate described pulse interface to the signal of described fan control unit transmission; Described secondary signal transmission isolation mounting one end connects described fan control unit, the other end connects the rotating speed interface of described fan unit, be used for transmitting described rotating speed interface to the tach signal of described fan control unit output, and isolate described fan control unit to the signal of described rotating speed interface transmission.
Optionally, described system also comprises: interface adapter, and described interface adapter comprises: first interface ABAP Adapter and the second interface adapter; Described first interface ABAP Adapter one end connects described first signal transmission isolation mounting, the other end connects the pulse interface of described fan unit, be used for first signal is transmitted the level of the pulse signal of isolation mounting output, be adapted to the level of the interface electric requirement that meets described pulse interface; Described the second interface adapter one end connects described secondary signal transmission isolation mounting, the other end connects the rotating speed interface of described fan unit, be used for the level with the tach signal of described fan unit output, be adapted to the level of the interface electric requirement that meets described secondary signal transmission isolation mounting.
Optionally, described first signal transmission isolation mounting also is used for the level of described pulse signal being changed into the level of the interface electric requirement that meets described pulse interface receiving described fan control unit after the pulse signal of described pulse interface output; Described secondary signal transmission isolation mounting also is used for receiving described rotating speed interface after the tach signal of described fan control unit output, the level of described tach signal is changed into the level of the interface electric requirement that meets described fan control unit.
Optionally, described system also comprises: the DC-isolation supply convertor; Described DC-isolation supply convertor one end connects described power supply, and the other end connects described fan control unit; Described DC-isolation supply convertor is for the power supply voltage of described power supply being converted to the control voltage of the electric requirement that meets described fan control unit.
Optionally, described signal transmission isolation mounting comprises following any one: relay and photo coupler.
Compared with prior art, the present invention includes following advantage:
Fan control system comprises fan control unit, fan unit, power supply and signal transmission isolation mounting, connect signal transmission isolation mounting between fan control unit and fan unit, and fan control unit and fan unit are separated ground connection, thereby the fluctuation of the supply voltage of fan unit can not impacted fan control unit, guarantee the situation of the normal operation of fan control unit, and then guarantee the stable operation of fan control system.
Description of drawings
Fig. 1 is the structural drawing of the PWM fan control system that provides of background technique;
Fig. 2 is the fan control system structural drawing that the embodiment of the present invention one provides;
Fig. 3 is fan control system the first structural drawing that the embodiment of the present invention two provides;
Fig. 4 is fan control system the second structural drawing that the embodiment of the present invention two provides.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The embodiment of the present invention provides a kind of fan control system, connect signal transmission isolation mounting between fan control unit and fan unit, and the reference of fan control unit and fan unit ground is separated, thereby the fluctuation of the supply voltage of fan unit can not impacted fan control unit, guarantee the situation of the normal operation of fan control unit, and then guarantee the stable operation of fan control system.
Embodiment one
With reference to Fig. 2, provided the fan control system structural drawing that the embodiment of the present invention one provides.
Described fan control system comprises: fan control unit 21, fan unit 22, power supply 23 and signal transmission isolation mounting 24.
Wherein: power supply 23 connects respectively described fan control unit 21 and fan unit 22, thereby power supply 23 can for fan control unit 21 and fan unit 22 power supplies, can normally move fan control system.
Wherein, power supply 23 can be positive supply or negative supply, depending on actual demand gets final product.Be generally negative supply as telecommunication system, DC – 48V, wherein, DC is Dirrect Current, DC electrical source.
Signal transmission isolation mounting 24 1 ends connect described fan control unit 21, and the other end connects described fan unit 22, is used for carrying out the electrical isolation between described fan control unit 21 and fan unit 22.
Wherein, the effect of electrical isolation is mainly the phase mutual interference that reduces between two different circuit.Electrical isolation can make does not have contacting directly on electric between two circuit, be namely mutually insulated between two circuit, will guarantee also that simultaneously two circuit keep the relation of Energy Transfer.
Therefore, transmit isolation mounting 24 by signal and can make fan control unit 21 and fan unit 22 on the basis of normal transmission signal, can not interact.
And, separate on the reference of fan control system fan control unit 21 and fan unit 22 ground.When thereby fluctuation appears in the supply voltage of fan unit 22, can not be transferred in fan control unit 21 by ground wire, and then can not impact fan control unit 21.
As shown in Figure 2, do not identify reference the ground of signal transmission isolation mounting 24, and reference of fan control unit 21 be GND1, be the reference of fan unit 22 GND2.Namely adopt signal transmission isolation mounting can complete ground connection (with reference to the ground) isolation of fan control unit 21 and fan unit 22, GND1, GND2 with forming separately reference.
In sum, fan control system comprises fan control unit, fan unit, power supply and signal transmission isolation mounting, connect signal transmission isolation mounting between fan control unit and fan unit, and the reference of fan control unit and fan unit ground is separated, thereby the fluctuation of the supply voltage of fan unit can not impacted fan control unit, guarantee the situation of the normal operation of fan control unit, and then guarantee the stable operation of fan control system.
Embodiment two
With reference to Fig. 3, provided fan control system the first structural drawing that the embodiment of the present invention two provides.
In the embodiment of the present invention, in order to coordinate the interface of multiple different fan unit, fan control system also comprises interface adapter 25.Interface adapter 25 1 ends connect described signal transmission isolation mounting 24, and the other end connects described fan unit 22.Described interface adapter 25 is used for the signal that adaptive described signal transmission isolation mounting 24 transmits with described fan unit 22 when carrying out electrical isolation.Thereby adopt interface adapter can settling signal transmission isolation mounting and the interface of fan unit between the signal adaptation conversion.
With reference to Fig. 4, provided fan control system the second structural drawing that the embodiment of the present invention two provides.
In the embodiment of the present invention, fan control unit 21 is controlled the rotating speed of fan unit 22 fans by pulse signal, fan unit 22 also can be transferred to tach signal fan control unit 21 simultaneously, and pulse signal and tach signal transmit respectively, therefore, signal transmission isolation mounting 24 comprises: first signal transmission isolation mounting 241 and secondary signal transmission isolation mounting 242, described fan unit 22 comprises pulse interface 221 and rotating speed interface 222.
Described first signal transmission isolation mounting 241 1 ends connect described fan control unit 21, the other end connects the pulse interface 221 of described fan unit 22, be used for transmitting described fan control unit 21 to the pulse signal (as pwm signal) of described pulse interface 221 outputs, and isolate described pulse interface 221 to the signal of described fan control unit 21 transmission.
Described secondary signal transmission isolation mounting 242 1 ends connect described fan control unit 21, the other end connects the rotating speed interface 222 of described fan unit 22, be used for transmitting described rotating speed interface 222 to the tach signal (as the TACH signal) of described fan control unit 21 outputs, and isolate described fan control unit 21 to the signal of described rotating speed interface 222 transmission.
Based on above-described embodiment, further, interface adapter 25 comprises: first interface ABAP Adapter 251 and the second interface adapter 252.
First interface ABAP Adapter 251 1 ends connect described first signal transmission isolation mounting 241, the other end connects the pulse interface 221 of described fan unit 22, be used for first signal is transmitted the level of the pulse signal of isolation mounting 241 outputs, be adapted to the level of the interface electric requirement that meets described pulse interface 221.
Described the second interface adapter 252 1 ends connect described secondary signal transmission isolation mounting 242, the other end connects the rotating speed interface 222 of described fan unit 22, be used for the level with the tach signal of described fan unit 22 outputs, be adapted to the level of the interface electric requirement that meets described secondary signal transmission isolation mounting 242.
Optionally, described first signal transmission isolation mounting 241, also be used for the level of described pulse signal being changed into the level of the interface electric requirement that meets described pulse interface 221 receiving described fan control unit 21 after the pulse signal of described pulse interface 221 outputs.
as shown in Figure 4, based on said structure, in fan control system, fan control unit 21 transmission PWM1 signals are to signal the first transmission isolation mounting 241, transformed by the level of the first transmission isolation mounting 241 with the PWM1 signal, make the level of the PWM2 signal that changes into meet the interface electric requirement of first interface ABAP Adapter 251, and the PWM2 signal is transferred to first interface ABAP Adapter 251, by first interface ABAP Adapter 251, the level adapted of PWM2 signal is become the level of the interface electric requirement of coincidence pulse interface 221, namely be adapted to the PWM3 signal, and be transferred to pulse interface 221.
Described secondary signal transmission isolation mounting 242, also be used for receiving described rotating speed interface 222 after the tach signal of described fan control unit 21 outputs, the level of described tach signal changed into the level of the interface electric requirement that meets described fan control unit 21.
as shown in Figure 4, based on said structure, in fan control system, rotating speed interface 222 is transferred to the second interface adapter 252 with the TACH3 signal, the second interface adapter 252 is become to meet the level of the interface electric requirement of secondary signal transmission isolation mounting 242 with the TACH3 signal adaptation, namely be adapted to the TACH2 signal, then the TACH2 signal is transferred to secondary signal transmission isolation mounting 242, secondary signal transmission isolation mounting 242 changes into the level of TACH2 signal the level that meets fan control unit 21 interface electric requirements, namely change into the TACH1 signal, then the TACH1 signal is transferred to fan control unit 21.
In the embodiment of the present invention, fan control unit can comprise fan control module and current drives module, thereby can carry out power drive to PWM, TACH signal by the current drives module.The current drives module can comprise the first current drives module and the second current drives module, is transferred to first signal transmission isolation mounting thereby the pwm signal that the first current drives module is exported fan control module is converted into the PWM1 signal.The TACH1 signal that the second current drives module is transmitted isolation mounting output with secondary signal is converted into the TACH signal and is transferred to fan control module.
In actual treatment, fan control unit 21 and fan unit 22 can adopt different power supply voltages, so fan control system also comprises: DC-isolation supply convertor 26(DC/DC).DC-isolation supply convertor 26 1 ends connect described power supply 23, and the other end connects described fan control unit 24.
Described DC-isolation supply convertor 26 is for the power supply voltage of described power supply 23 being converted to the control voltage of the electric requirement that meets described fan control unit 21.Thereby by DC-isolation supply convertor 26, can provide the power supply of fan control unit 21, complete the electrical isolation of power supply voltage VDD of control voltage VCC, the fan unit of fan control unit 21.
As shown in Figure 4, the power supply voltage of power supply 23 is VDD, thereby the power supply voltage that power supply 23 is directly fan unit 22 for fan unit 22 power supplies is VDD.And the control voltage VCC of fan control unit 21 need to generate by fan control unit 21 conversions.The power supply voltage of power supply 23 employing-48V for example, and the control voltage voltage of fan control unit 21 is 3.3V, can pass through DC-isolation supply convertor 26(Dirrect Current/Dirrect Current, DC/DC) general-48V is converted to 3.3V, so that fan control unit 21 normal operations.
Optionally, signal transmission isolation mounting 24 comprises following any one: relay and photo coupler.
Wherein, relay (Relay) is a kind of electric control device, is when the variation of input quantity (energizing quantity) reaches the regulation requirement, makes controlled volume that a kind of electrical equipment that predetermined step changes occurs in electric output circuit.It has control system (claim not only input circuit) and by the interactive relationship between control system (but also claiming output loop).Usually be applied in the control circuit of automation, it is actually a kind of " recloser " that goes to control large electric current running with little electric current.Therefore play the effects such as automatic adjusting, safety protection, change-over circuit in circuit.
Photo coupler is a kind of electricity-light-power conversion device take light as the media transmission electrical signal.It is comprised of light emitting source and light receiver two-part.Light emitting source and light receiver are assembled in same airtight housing, isolate with transparent insulator to each other.The pin of light emitting source is input end, and the pin of light receiver is output terminal, and common light emitting source is light emitting diode, and light receiver is photodiode, phototransistor etc.
For example, if adopt the photo coupler that light emitting diode and phototransistor consist of to transmit isolation mounting 241 as first signal, can be with light emitting diode and fan control unit 21 altogether, namely common connection is with reference to ground GND1, and with phototransistor and fan unit 22 altogether, i.e. common connection with reference to ground GND2, thus reference the ground of realizing fan control unit 21 and fan unit 22 isolates.Certainly, adopt different signal transmission isolation mountings can adopt different earthing methods in actual treatment, only be used for discussing for example herein, should not be understood as the restriction to the embodiment of the present invention.
And signal transmission isolation mountings different in actual treatment have different connecting means from power supply, and the embodiment of the present invention is not construed as limiting this.For example, when adopting the first signal transmission isolation mounting 241 that is made of photo coupler in above-described embodiment, light emitting diode can be powered by fan control unit 21, and phototransistor can be directly by power supply 23 power supplies.
Certainly can also adopt other devices to consist of signal transmission isolation mounting in actual treatment, above-mentioned only being used for illustrates, and the embodiment of the present invention is not construed as limiting this.
In sum, adopt signal isolation circuit to complete the ground connection of each fan unit of fan control unit (with reference to ground) isolation, avoided fan control unit and the mutual interference mutually that fan unit directly forms by " sharing with reference to ground ", effectively improve stabilization of equipment performance.
Secondly, in the fan control system that the embodiment of the present invention provides, fan unit directly adopts the system power supply power supply, and adopt the isolated DC converting power source to provide control voltage for fan control unit, can realize the electrical isolation of the power supply of fan control unit and fan unit, and then avoid interference between power supply, effectively improve stabilization of equipment performance.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and other embodiments' difference that between each embodiment, identical similar part is mutually referring to getting final product.
At last, also need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or control panel, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, commodity or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, commodity or equipment.In the situation that not more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.
Above to a kind of fan control system provided by the present invention, be described in detail, used specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. a fan control system, is characterized in that, comprising:
Fan control unit, fan unit, power supply and signal transmission isolation mounting;
Wherein: described power supply connects respectively described fan control unit and fan unit, is used to the power supply of described fan control unit and fan unit;
Described signal transmission isolation mounting one end connects described fan control unit, and the other end connects described fan unit, is used for carrying out the electrical isolation between described fan control unit and fan unit;
Separate to the reference of described fan control unit and fan unit.
2. system according to claim 1, is characterized in that, also comprises: interface adapter;
Described interface adapter one end connects described signal transmission isolation mounting, and the other end connects described fan unit;
Described interface adapter is used for the signal that adaptive described signal transmission isolation mounting transmits with described fan unit when carrying out electrical isolation.
3. system according to claim 1, is characterized in that, described signal transmission isolation mounting comprises: first signal transmission isolation mounting and secondary signal transmission isolation mounting, and described fan unit comprises pulse interface and rotating speed interface;
Described first signal transmission isolation mounting one end connects described fan control unit, the other end connects the pulse interface of described fan unit, be used for transmitting described fan control unit to the pulse signal of described pulse interface output, and isolate described pulse interface to the signal of described fan control unit transmission;
Described secondary signal transmission isolation mounting one end connects described fan control unit, the other end connects the rotating speed interface of described fan unit, be used for transmitting described rotating speed interface to the tach signal of described fan control unit output, and isolate described fan control unit to the signal of described rotating speed interface transmission.
4. system according to claim 3, is characterized in that, also comprises: interface adapter, and described interface adapter comprises: first interface ABAP Adapter and the second interface adapter;
Described first interface ABAP Adapter one end connects described first signal transmission isolation mounting, the other end connects the pulse interface of described fan unit, be used for first signal is transmitted the level of the pulse signal of isolation mounting output, be adapted to the level of the interface electric requirement that meets described pulse interface;
Described the second interface adapter one end connects described secondary signal transmission isolation mounting, the other end connects the rotating speed interface of described fan unit, be used for the level with the tach signal of described fan unit output, be adapted to the level of the interface electric requirement that meets described secondary signal transmission isolation mounting.
5. according to claim 3 or 4 described systems, is characterized in that;
Described first signal transmission isolation mounting also is used for the level of described pulse signal being changed into the level of the interface electric requirement that meets described pulse interface receiving described fan control unit after the pulse signal of described pulse interface output;
Described secondary signal transmission isolation mounting also is used for receiving described rotating speed interface after the tach signal of described fan control unit output, the level of described tach signal is changed into the level of the interface electric requirement that meets described fan control unit.
6. system according to claim 1, is characterized in that, also comprises: the DC-isolation supply convertor;
Described DC-isolation supply convertor one end connects described power supply, and the other end connects described fan control unit;
Described DC-isolation supply convertor is for the power supply voltage of described power supply being converted to the control voltage of the electric requirement that meets described fan control unit.
7. according to claim 1,2,5 or 6 arbitrary described systems, it is characterized in that, described signal transmission isolation mounting comprises following any one: relay and photo coupler.
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| CN201310284831.1A CN103382945B (en) | 2013-07-08 | 2013-07-08 | A kind of fan control system |
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| CN201310284831.1A CN103382945B (en) | 2013-07-08 | 2013-07-08 | A kind of fan control system |
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| CN103382945B CN103382945B (en) | 2016-12-28 |
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Cited By (4)
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| CN105446436A (en) * | 2014-08-18 | 2016-03-30 | 联想(北京)有限公司 | Electronic device and fan assembly |
| CN107420334A (en) * | 2017-06-09 | 2017-12-01 | 深圳市盛仕达电子有限公司 | A kind of speed-adjusting and control system of pipeline fan |
| CN109340163A (en) * | 2018-12-04 | 2019-02-15 | 惠阳锦诚电子有限公司 | A kind of signal control module and control system applied to brushless ceiling fan |
| CN109340163B (en) * | 2018-12-04 | 2024-04-19 | 惠阳锦诚电子有限公司 | Signal control module and control system applied to brushless ceiling fan |
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| CN107420334A (en) * | 2017-06-09 | 2017-12-01 | 深圳市盛仕达电子有限公司 | A kind of speed-adjusting and control system of pipeline fan |
| CN109340163A (en) * | 2018-12-04 | 2019-02-15 | 惠阳锦诚电子有限公司 | A kind of signal control module and control system applied to brushless ceiling fan |
| CN109340163B (en) * | 2018-12-04 | 2024-04-19 | 惠阳锦诚电子有限公司 | Signal control module and control system applied to brushless ceiling fan |
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| Publication number | Publication date |
|---|---|
| CN103382945B (en) | 2016-12-28 |
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Effective date of registration: 20220609 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Patentee after: Shanghai Datang Mobile Communication Equipment Co., Ltd Address before: No.29 Xueyuan Road, Haidian District, Beijing 100191 Patentee before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
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