CN104612994A - Design method for PWM fan control of server power supply - Google Patents
Design method for PWM fan control of server power supply Download PDFInfo
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- CN104612994A CN104612994A CN201410826100.XA CN201410826100A CN104612994A CN 104612994 A CN104612994 A CN 104612994A CN 201410826100 A CN201410826100 A CN 201410826100A CN 104612994 A CN104612994 A CN 104612994A
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- fan
- rotation speed
- power supply
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- rotating speed
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000013461 design Methods 0.000 title claims abstract description 15
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Temperature (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention provides a design method for controlling a server power supply PWM fan, which belongs to the field of design methods for controlling server power supply fans, adopts a 4-wire PWM fan, namely a frequency feedback signal wire FG with PWM input signal wire control rotating speed and rotating speed, realizes temperature control of the rotating speed of the fan with an MCU interface, and directly informs the MCU of the MCU to control the set rotating speed through an I2C interface. The power supply of the server power supply can be more reliable.
Description
Technical field
The present invention relates to the design method technology of server power supply air-blower control, particularly relate to a kind of design method of server power supply PWM air-blower control.
Background technique
Along with the fast development of internet economy, the status of server significantly promotes, and in order to pursue the reliability that server is powered, except utilizing the equipment such as UPS and powering, client or power supply manufacturer are also in the breakthrough that power supply is originally actively sought with it.
Wherein there is Redundancy Design, namely everybody said redundant power, redundant power is a kind of power supply be commonly used at present in server, be made up of two duplicate power modules, carry out load balancing by chip controls power supply, when a power module breaks down, another power module can take over its work at once, after replacing power supply, be again two power module collaborative works.Redundant power is the high availability in order to realize server system.
Moreover be exactly power supply heat sinking design, good power supply heat sinking can ensure that the normal operation of power supply is unlikely to be subject to the change of temperature and occurs mutation, and there is the power supply heat sinking solution of oneself uniqueness in current each power supply producer, takes the course of its own.
Power supply heat sinking is the problem that market is paid close attention to always, a lot of power supply exist upper electric fan completely turn or temperature variation very small fan rotating speed the problem such as but extremely to improve.
Summary of the invention
The invention process proposes a kind of design method of server power supply PWM air-blower control, effectively solves the problems referred to above, and further increases the reliability of power supply heat sinking, ensures point for power source integral reliability design provides one.
Pwm control signal and speed-frequency feedback signal and the comprehensive method of three kinds of test points is adopted to realize power source internal heat radiation.
The starting point of the design is also provide an approach to server power supply heat radiation, is convenient to the design of power source integral.
A kind of design method of server power supply PWM air-blower control, adopt 4 line PWM blower fans, namely with the frequency feedback signal line FG of PWM input signal line traffic control rotating speed and rotating speed, control with the temperature of MCU Interface realization rotation speed of fan and directly carry out setting speed by I2C interface notification MCU to control.
Rotating speed will be controlled by temperature control curve or current curve after power module start, rotation speed of fan will rise according to temperature or input current increase and linearly increase.
Interim controlling value is calculated by three kinds of schemes and primary side temperature control algorithm, primary side temperature control algorithm, Current Control blower fan algorithm;
Primary side temperature control algorithm adopts the linear approximate relationship that band upper and lower is saturated, namely below 25 DEG C, limiting rotation speed of fan is about 1800RPM, and rotation speed of fan keeps completely transferring about 18000RPM to more than 80 DEG C, between 25 DEG C to 68 DEG C according to rotating speed between 1800RPM to 9000RPM with temperature value linear change, between 68 DEG C to 80 DEG C according to rotating speed between 9000RPM to 18000RPM with temperature value linear change, obtained the interim controlling value Temp1 of rotation speed of fan by above algorithm;
Primary side temperature control algorithm is also the linear approximate relationship adopting band upper and lower saturated, namely below 25 DEG C, limiting rotation speed of fan is about 1800RPM, and rotation speed of fan keeps completely transferring about 18000RPM to more than 80 DEG C, between 25 DEG C to 68 DEG C according to rotating speed between 1800RPM to 9000RPM with temperature value linear change, between 68 DEG C to 80 DEG C according to rotating speed between 9000RPM to 18000RPM with temperature value linear change, obtained the interim controlling value Temp2 of rotation speed of fan by above algorithm;
Current Control blower fan algorithm adopts power input current value control mode, being less than 1A limit rotation speed of fan at input current is about 1800RPM, when input current is greater than 8A, rotation speed of fan keeps completely transferring about 18000RPM to, and current value linear change rotating speed is pressed in employing between 1A to 8A, obtained the interim controlling value Temp3 of rotation speed of fan by above algorithm;
The final air-blower control value that power source internal MCU exports is interim controlling value Temp1, Temp2 and the Temp3 that more above-mentioned three kinds of schemes calculate, and gets value large between three as the final rotation speed of fan controlling value exported.
Also sending PMBus order adjusting rotary speed by I2C interface and control rotation speed of fan, for ensureing the reliability of power supply, rotation speed of fan can only be raised based on current state.
Also done blower fan rotation-clogging protection, namely when power supply is under open state, the frequency of rotation speed of fan frequency feedback signal is less than setting value and then triggers blower fan rotation-clogging protection, powered-down; Enter locking state, after upset PSON# or AC plugs again, then can reopen power supply.
Beneficial effect of the present invention:
Adopt scheme of the present invention, namely pwm control signal and speed-frequency feedback signal and the comprehensive method of three kinds of test points, effectively can solve power supply heat sinking, and method is clear simple and reliability is high.
Accompanying drawing explanation
Fig. 1 is control block diagram.
Fig. 2 .PSU level focus temperature control curve figure.
Fig. 3 .PSU elementary focus temperature control curve figure.
Fig. 4 .PSU input current temperature control curve figure.
Embodiment
More detailed elaboration is carried out to content of the present invention below:
Control schematic diagram as shown in Figure 1, wherein, the magnitude of voltage that " Temperature Voltage " tests out for thermistor end, the current value that " IIN CURRENT " is power supply AC input end, " I2C Command " controls rotation speed of fan function by PMBus instruction.
Rotating speed will be controlled by temperature control curve or current curve after power module start, as primary side temperature during start and primary side temperature all lower than 25 DEG C, input current lower than 1A, now rotation speed of fan is about 1800RPM.Rotation speed of fan will according to temperature rise or input current increase and linearly increase.
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 2, primary side temperature control algorithm adopts the linear approximate relationship that band upper and lower is saturated, namely below 25 DEG C, limiting rotation speed of fan is about 1800RPM, and rotation speed of fan keeps completely transferring about 18000RPM to more than 80 DEG C, between 25 DEG C to 68 DEG C according to rotating speed between 1800RPM to 9000RPM with temperature value linear change, between 68 DEG C to 80 DEG C according to rotating speed between 9000RPM to 18000RPM with temperature value linear change, obtained the interim controlling value Temp1 of rotation speed of fan by above algorithm, detailed rotating speed and vs. temperature are with reference to accompanying drawing 2.
As shown in Figure 3, primary side temperature control algorithm is also the linear approximate relationship adopting band upper and lower saturated, namely below 25 DEG C, limiting rotation speed of fan is about 1800RPM, and rotation speed of fan keeps completely transferring about 18000RPM to more than 80 DEG C, between 25 DEG C to 68 DEG C according to rotating speed between 1800RPM to 9000RPM with temperature value linear change, between 68 DEG C to 80 DEG C according to rotating speed between 9000RPM to 18000RPM with temperature value linear change, the interim controlling value Temp2 of rotation speed of fan is obtained by above algorithm, detailed rotating speed and vs. temperature are with reference to accompanying drawing 3.
As shown in Figure 4, Current Control blower fan algorithm adopts power input current value control mode, being less than 1A limit rotation speed of fan at input current is about 1800RPM, when input current is greater than 8A, rotation speed of fan keeps completely transferring about 18000RPM to, and current value linear change rotating speed is pressed in employing between 1A to 8A, obtained the interim controlling value Temp3 of rotation speed of fan by above algorithm, detailed rotating speed and input current corresponding relation are with reference to accompanying drawing 4.
To sum up: the final air-blower control value that power source internal MCU exports is the interim controlling value Temp1 that more above-mentioned three kinds of schemes calculate, Temp2 and Temp3, get value large between three as the final rotation speed of fan controlling value exported, so that the situation of electric current and temperature when taking into account work, power supply is allowed to be in optimum radiating state all the time.
Also sending PMBus order adjusting rotary speed by I2C interface in addition and control rotation speed of fan, for ensureing the reliability of power supply, rotation speed of fan can only be raised based on current state.
In addition, also done blower fan rotation-clogging protection, namely when power supply is under open state, the frequency of rotation speed of fan frequency feedback signal is less than certain setting value and then triggers blower fan rotation-clogging protection, powered-down.Enter locking state, after upset PSON# or AC plugs again, then can reopen power supply.
The solution of power supply heat sinking can be made to have higher reliability by above-mentioned this design.
Claims (5)
1. the design method of a server power supply PWM air-blower control, it is characterized in that, adopt 4 line PWM blower fans, namely with the frequency feedback signal line FG of PWM input signal line traffic control rotating speed and rotating speed, control with the temperature of MCU Interface realization rotation speed of fan and directly carry out setting speed by I2C interface notification MCU to control.
2. method according to claim 1, is characterized in that,
Rotating speed will be controlled by temperature control curve or current curve after power module start, rotation speed of fan will rise according to temperature or input current increase and linearly increase.
3. method according to claim 2, is characterized in that, calculates interim controlling value by three kinds of schemes and primary side temperature control algorithm, primary side temperature control algorithm, Current Control blower fan algorithm;
Primary side temperature control algorithm adopts the linear approximate relationship that band upper and lower is saturated, namely below 25 DEG C, limiting rotation speed of fan is about 1800RPM, and rotation speed of fan keeps completely transferring about 18000RPM to more than 80 DEG C, between 25 DEG C to 68 DEG C according to rotating speed between 1800RPM to 9000RPM with temperature value linear change, between 68 DEG C to 80 DEG C according to rotating speed between 9000RPM to 18000RPM with temperature value linear change, obtained the interim controlling value Temp1 of rotation speed of fan by above algorithm;
Primary side temperature control algorithm is also the linear approximate relationship adopting band upper and lower saturated, namely below 25 DEG C, limiting rotation speed of fan is about 1800RPM, and rotation speed of fan keeps completely transferring about 18000RPM to more than 80 DEG C, between 25 DEG C to 68 DEG C according to rotating speed between 1800RPM to 9000RPM with temperature value linear change, between 68 DEG C to 80 DEG C according to rotating speed between 9000RPM to 18000RPM with temperature value linear change, obtained the interim controlling value Temp2 of rotation speed of fan by above algorithm;
Current Control blower fan algorithm adopts power input current value control mode, being less than 1A limit rotation speed of fan at input current is about 1800RPM, when input current is greater than 8A, rotation speed of fan keeps completely transferring about 18000RPM to, and current value linear change rotating speed is pressed in employing between 1A to 8A, obtained the interim controlling value Temp3 of rotation speed of fan by above algorithm;
The final air-blower control value that power source internal MCU exports is interim controlling value Temp1, Temp2 and the Temp3 that more above-mentioned three kinds of schemes calculate, and gets value large between three as the final rotation speed of fan controlling value exported.
4. method according to claim 1, is characterized in that, also sending PMBus order adjusting rotary speed by I2C interface and controls rotation speed of fan, for ensureing the reliability of power supply, can only raise rotation speed of fan based on current state.
5. method according to claim 1, is characterized in that, has also done blower fan rotation-clogging protection, and namely when power supply is under open state, the frequency of rotation speed of fan frequency feedback signal is less than setting value and then triggers blower fan rotation-clogging protection, powered-down; Enter locking state, after upset PSON# or AC plugs again, then can reopen power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410826100.XA CN104612994B (en) | 2014-12-26 | 2014-12-26 | A kind of method for designing of server power supply PWM air-blower control |
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| CN201410826100.XA CN104612994B (en) | 2014-12-26 | 2014-12-26 | A kind of method for designing of server power supply PWM air-blower control |
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| CN104612994B CN104612994B (en) | 2017-03-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388981A (en) * | 2015-11-27 | 2016-03-09 | 浪潮电子信息产业股份有限公司 | Server power supply fan control method and fan controller |
| CN109270473A (en) * | 2018-10-17 | 2019-01-25 | 郑州云海信息技术有限公司 | A kind of method and system for examining power supply function |
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Patent Citations (6)
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| CN105388981A (en) * | 2015-11-27 | 2016-03-09 | 浪潮电子信息产业股份有限公司 | Server power supply fan control method and fan controller |
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Effective date of registration: 20170118 Address after: 450000 Henan province Zheng Dong New District of Zhengzhou City Xinyi Road No. 278 16 floor room 1601 Applicant after: Zhengzhou Yunhai Information Technology Co. Ltd. Address before: 250101 Ji''nan high tech Zone, Shandong, No. 1036 wave road Applicant before: Langchao Electronic Information Industry Co., Ltd. |
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