CN102506025A - 12V direct-current air cooling control module - Google Patents
12V direct-current air cooling control module Download PDFInfo
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- CN102506025A CN102506025A CN201110381414XA CN201110381414A CN102506025A CN 102506025 A CN102506025 A CN 102506025A CN 201110381414X A CN201110381414X A CN 201110381414XA CN 201110381414 A CN201110381414 A CN 201110381414A CN 102506025 A CN102506025 A CN 102506025A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a 12V direct-current air cooling control module used for monitoring and controlling the rotary speed of a fan freely, saving energy consumption and reducing noise. The 12V direct-current air cooling control module provided by the invention consists of a backboard connector, a hot plug circuit, a filtering decoupling circuit, a high-frequency (PWM) control circuit and a fan connector; the hot plug circuit consists of a filter, a first voltage divider, a current detection resistor, a hot plug controller, a timer, a second voltage divider and a switch tube; the filtering decoupling circuit consists of a common filter and four branched filters; and the high-frequency PWM control circuit consists of a pulse-width modulation controller and a signal electric level presetting circuit. The 12V direct-current air cooling control module provided by the invention can be used for monitoring and controlling the rotary speed of the fan freely and can realize the operations of hot plugging, replacement and the like for the fan, thereby saving a great amount of electricity energy, reducing noise greatly, prolonging the service life of the fan and reducing the operation cost of the system.
Description
Technical field
The present invention relates to a kind of air-cooled control module, especially refer to the air-cooled control module of a kind of 12V direct current.
Background technique
Along with the high-performance computer specific power is increasing; Realize that computer system is efficient, in the secure heat dissipation; Reduce the electric power of supporting cooling infrastructure, promoting the whole energy use efficiency of all system also is the research content of high-performance computer system cooling technology.The forced air cooling heat dissipation technology is because technology is simple, cost is low, radiating effect significantly and for a long time is applied.Along with the raising of packaging density and the variation of power supply plan, increasing to the demand of blast, air quantity, more and more to the number of fans demand.This has just brought additional problems: power consumption significantly increases, and noise more and more lets the people stand.Because system radiating itself is just taked Redundancy Design, the problems referred to above just seem particularly outstanding in the system job amount when not being very big in addition.And a lot of large scale systems often the most time workload is little, the processor utilization rate is not high, at this moment air cooling system just shows as inefficiency.How to address this problem is in current and later high-performance computer system development, all will further investigate.
Tend to adopt the structure of " backboard+card module " in a lot of large data systems, air cooling module is based on also that this module plug-in structure produces, when blower module is safeguarded in replacing, must be under the situation that does not influence system works warm swap.Circuit powers on or can produce very great start-up current and voltage functuation during warm swap, and these phenomenons will influence the proper functioning of other card module, even cause the infringement of whole system.
Because needs energy-conservation, noise reduction must carry out online adjusting wind speed to fan according to load temperature, system's operating load situation.Because high-performance computer is not shut down operation generally speaking, the fan that therefore uses must possess power-on serving, change function.The fan power supply voltage is generally taken from common bus voltage, but its electric current often brings very large disturbance, brings huge injury often for other power supply circuits, and this once occurred in supercomputer system in the past, and this situation must solve.No matter fan control technology in the past is to adopt simple switch control or linearity control; Still only to the low frequency pulse modulation technology of fan speed-regulating, all can not solve fan electrical current does not fully have problems such as the control of supervision to low life-span of impact of interference, strong noise, high electric energy loss, fan, the rotation speed of the fan of busbar voltage.
The Domestic market does not also have the air-cooled control module product of 12V direct current at present.The operating voltage that the air-cooled control module of external direct current has is higher, is mostly 24V, 48V even higher voltage and designs, and operating current load capacity maximum can only reach 6A; And often only comprise fan control circuitry design; Individual product comprises plug-and-play circuit; The 12V air cooling module that comprises live inserting and pulling, filtering decoupling zero, fan control does not simultaneously also have; And the external connection of existing product structure all is to adopt the cable Placement, is inappropriate for the data system that adopts back board structure and concentrate DC bus powered mode.
Summary of the invention
The technical problem that the present invention will solve is: for solve fully technology such as simple switch control, linearity control, low frequency PWM the fan electrical current that can't solve fully low life-span of impact of interference, strong noise, high electric energy loss, fan, the fan of busbar voltage are kept watch on problems such as control is insufficient; The present invention provides a kind of 12V direct current air-cooled control module; Realization is controlled with energy efficient, reduction noise with any the supervision of rotation speed of the fan; Realize the operation such as warm swap, replacing of blower module simultaneously; And with data system in the shared 12V dc bus of other circuit and can not having a negative impact, and working life of improving fan.And the load capacity of this air-cooled control module is not less than 20A.
To achieve these goals, the present invention adopts following technological scheme:
The air-cooled control module of 12V direct current of the present invention is installed in the interpolation frame that the cooling service is provided in the high-performance computer system rack, links to each other with the backboard of computer.(pulse width modulation, PWM) control circuit, fan connector are formed, and all are integrated on the printed circuit board by back panel connector, plug-and-play circuit, filtering decoupling zero circuit, high-frequency pulsed width modulation in the present invention.The present invention is connected through back panel connector with System Backplane, is connected through the fan connector between the present invention and the fans.
Back panel connector adopts commercial connector (be like FCI S.A.'s article No. 51700 product), requires the load current ability to be not less than 20A, and signal pin is no less than 6.The backboard of back panel connector and computer system, inner hot-swapping controller, the high-frequency pulsed width modulation control circuit of the present invention link to each other, for other parts of the present invention provide 12V DC electrical source, 3.3V DC electrical source,, electric transmission such as signal be connected; Back panel connector is that system monitoring unit (monitor and control unit is hereinafter to be referred as MCU) realizes that to the fans that links to each other with the present invention supervision control provides passage.
Plug-and-play circuit is connected with back panel connector, filtering decoupling zero circuit; For the present invention overcurrent protection, overvoltage protection, under-voltage protection are provided, power up slowly start, Hot Plug Capability, eliminate the air-cooled control module of 12V direct current power up start and during warm swap to the impact and the interference of busbar voltage.Hot connecting and disconnecting route wave filter, first voltage divider, inspection leakage resistance, hot-swapping controller, timer, second voltage divider and switching tube are formed.Wave filter links to each other with back panel connector, first voltage divider, inspection leakage resistance; The RC eliminator and first diode by routine are formed in parallel; The RC eliminator adopts the resistance of one 10 Ω and the capacitances in series of one 0.1 μ f/25V to form; The resistance of RC circuit all links to each other with back panel connector, first voltage divider, inspection leakage resistance with first diode, and the electric capacity the other end of first diode and RC circuit all is connected with ground.First voltage divider, second voltage divider are in series by first divider resistance and second divider resistance, satisfy the electric current restriction less than 10 μ A, realize the startup threshold design of 10.8V simultaneously.Optional first divider resistance is 60.4k Ω during design, and second divider resistance is 8.45k Ω.The first voltage divider outside links to each other with back panel connector, and inside links to each other with hot-swapping controller, wave filter, inspection leakage resistance.First divider resistance of first voltage divider links to each other with back panel connector, inspection leakage resistance, wave filter, and second divider resistance links to each other with hot-swapping controller.Second voltage divider links to each other with hot-swapping controller, switching tube, filtering decoupling zero circuit, and first divider resistance of second voltage divider links to each other with switching tube, filtering decoupling zero circuit, and second divider resistance of second voltage divider links to each other with hot-swapping controller.The inspection leakage resistance is the resistance of 0.002 a Ω/3W, and the outside links to each other with back panel connector, and inside links to each other with switching tube, hot-swapping controller, wave filter, first voltage divider.Hot-swapping controller links to each other with first voltage divider, inspection leakage resistance, switching tube, second voltage divider, timer; Adopt commercial hot-swapping controller; Its operating voltage >=12V; Operating temperature is 0～70 ℃, has current sense function, has overcurrent protection, overvoltage protection, under-voltage protection simultaneously, regularly starts function.Timer links to each other with hot-swapping controller; Form by first electric capacity of a lnf/50V and second electric capacity of a 22nf/50V; One end of two electric capacity all links to each other with hot-swapping controller; The equal ground connection of the other end, first electric capacity is used to set the error protection time, and second electric capacity is used to set starting time.Switching tube links to each other with inspection leakage resistance, hot-swapping controller, second voltage divider and filtering decoupling zero circuit, and the employing operating voltage is 30V, operating current>=50A, conduction impedance R
DSThe N-MOS of≤0.01 Ω.
Filtering decoupling zero circuit is connected with plug-and-play circuit, fan connector; Form by secondary LC eliminator; The first order is a common filter, with switching tube, second voltage divider and first branching filter of plug-and-play circuit ... The L branching filter ... The N branching filter links to each other; The second level by first branching filter ... The L branching filter ... The N branching filter is formed; Link to each other with common filter, fan connector respectively; N is the fan number in the single fan interpolation frame; Depend on computer system Cooling Design and structural design, be generally less than at present and equal 6, N >=L >=1.Common filter adopts traditional LC eliminator, and the LC eliminator of common filter requires inductance value＞500nH, and rated current＞20A requires the capacity＞2.8mf, withstand voltage＞16V of electric capacity.N branching filter is formed in parallel by traditional LC eliminator and a diode; The inductance that the LC eliminator adopts in each branching filter requires to satisfy inductance value＞10 μ H, rated current＞4A; The electric capacity that adopts requires total capacity＞2.3mf, withstand voltage＞16V, and it is 0.2A that second diode of employing all requires the withstand voltage 75V of being, forward conduction electric current.This filtering decoupling zero circuit has weakened the interference of fan work electric current to backboard 12V busbar voltage greatly.
The high-frequency pulsed width modulation control circuit is connected with back panel connector, fan connector, is that PWM controller and signal level pre-set circuit and form by PDM keyer.PWM controller and signal level pre-set circuit, back panel connector, fan connector and link to each other, and signal level pre-sets circuit and links to each other with PWM controller, back panel connector.The PWM controller is selected to have communication bus, is no less than N road PWM output, N road TACH input channel, commercial controller with single address wire, and the pwm signal frequency of its output can be operated in＞20KHz, and can be by the user's own setting.The pwm signal of PWM controller is connected with the TACH signaling line with the pwm signal line of N fan through the fan connector respectively with the TACH signal.The SCL pin of PWM controller, SDA pin, FSPEED pin and ALERT pin are connected with back panel connector, and realization is communicated by letter with system MCU.The PWM controller is accepted system MCU through back panel connector and is born the read/write operation order that the result of operation quantitative statistics and the inquiry of system idle condition sends according to temperature acquisition, system in the system, thereby the wind speed of fan is regulated; Report fan state and rotary speed information via back panel connector to system MCU through communication bus simultaneously.The PWM controller is accepted the write operation of MCU to its configuration register through back panel connector, and pulse width modulation frequency is set to 22.5KHz.The VCC pin of PWM controller is connected the acquisition power supply with the GND pin through back panel connector with backboard.Signal level pre-sets circuit and is formed in parallel by 2N+4 resistance.Wherein, resistance one end of 2 2.2k Ω links to each other with the PWM controller, and the other end links to each other with back panel connector, realizes the predefined value of CLK clock SCL, data-signal SDA.Resistance one end of 2 10k Ω links to each other with the PWM controller, and the other end links to each other with back panel connector, realizes the predefined value of interruption/alarm signal A LERT, wind speed signalization FSPEED.Resistance one end of 2N 2.2k Ω links to each other with the fan connector, and the other end links to each other with back panel connector, realizes the predefined value of N pwm signal and N TACH signal.
The fan connector is connected with filtering decoupling zero circuit, high-frequency pulsed width modulation control circuit, fans, is composed in parallel by N the commercial connector of 4 cores.The fan connector requires each contact pin load capacity＞5A.
The number of fans that whole high-effect computing system adopts possibly be M (several thousand even up to ten thousand), must increase quantity of the present invention this moment to satisfy the demand to whole fan control, uses quantity of the present invention to be M/N.
The air-cooled control module of 12V direct current of the present invention is when initially powering on; The hot-swapping controller of plug-and-play circuit detects the voltage of inspection leakage resistance; If this voltage＞50mV, realize the current-limiting protection function, the current potential of first voltage divider and second voltage divider is detected; If this voltage＞10.8V realizes overvoltage protection, under-voltage protection function.Reaching the purpose that whole 12V air cooling module is provided power-on protection, slowly powers on, is simultaneously that the 12V busbar voltage on the backboard provides protection when fan breaks down.When proper functioning of the present invention, filtering decoupling zero circuit receives the voltage ripple that fans produces from the fan connector, successively passes through the absorption of branching filter, common filter, and the interference with on the ground wire that feeds back to backboard 12V bus at last reduces greatly.The high-frequency pulsed width modulation control circuit receives the tach signal of the fans that the fan connector passes over constantly, keeps communicating by letter through back panel connector and system MCU.The present invention regularly transmits rotary speed information to system MCU through backboard, and according to system running state and the write operation of temperature conditions through backboard receiving system MCU, the operation that the completion of order PWM controller rises rotating speed or reduction of speed to fans.When the PWM controller receives the instruction that increases rotating speed, will increase the pwm signal dutycycle of its output, make rotation speed of the fan accelerate; When the PWM controller receives the instruction that reduces rotating speed, will reduce the pwm signal dutycycle of its output, make rotation speed of the fan slack-off.
Adopt the present invention can reach following technique effect:
1. perfection of the present invention has realized the support mission to the high-efficiency computer system running environment; Guarantee security of system, stable, operation reliably; Realized simultaneously the optimization of fan speed is regulated, practiced thrift a large amount of electric energy, reduced noise significantly; And the working life of having improved fan, practiced thrift system operation cost.The present invention is widely used in the high-efficiency computer system at several national supercomputing centers and plurality of data center.Obtain PWM dutycycle-speed curves according to practical test result, dutycycle is (6000RPM) running at full speed of 100% o'clock fan, and dutycycle is that 0 o'clock rotation speed of the fan is 1500RPM, and dutycycle is 50% to be that rotation speed of the fan is 3700RPM.Dutycycle is 50% and 0 o'clock, and fan electrical current is much smaller than at full speed the time, and the high-efficiency computer system at ultra calculation center has used nearly ten thousand fans, will practice thrift a large amount of electric energy.By the energy consumption calculation that every fan is on average practiced thrift 10w, all system only this item saving power surpassed 2000kwh in per 24 hours.
2. high-frequency pulsed width modulation control circuit of the present invention; Compare and adopt low frequency PWM; The frequency switching that adopts high frequency (22.5KHz) PWM to make that fan can not be heard, it is continuous keeping the power line of fan and ground wire simultaneously, obviously reduces even has eliminated the rectification noise.Have wideer control range than linearity control, use the high frequency pulse-width controlled, fan can operate at 10% between at full speed, and same fan use linearity control can only operating range can only be from 50% rotating speed to the full speed.This is very efficiently, because coil power or standard-sized sheet or complete shut-down.While transistor or pass or saturated, its loss is very low, the loss of having avoided transistor under linear control mode, to be produced.Because fan is with lower speed running (can change gradually), this is much quieter than standard-sized sheet or frequent on/off operation.And the low-speed running of fan can increase its life-span, the raising system reliability.
3. the design of plug-and-play circuit makes the air-cooled control module of 12V of the present invention can chargedly plug from backboard with fans, under the present invention or fans break down situation, realizes continuous charged renewal, maintenance.When initially powering on, make simultaneously the fans time-delay work on power (after stable operating voltage), guarantee can not produce to impact the backboard busbar voltage.
4. the disturbance current that the design of filtering decoupling zero circuit of the present invention produces during to fan work has very big absorption, elimination; Guarantee the stable operation of high-efficiency computer system when proper functioning, can not occur because the fans operating current influences system's operation to the interference of busbar voltage.
5. back panel connector of the present invention realizes that the air-cooled control module of 12V is connected with the reliable of high-efficiency computer System Backplane with fans, accomplishes the transmission of supervisory signal and electric energy, satisfies plug operation eaily simultaneously.
Description of drawings
Fig. 1 is that general structure of the present invention and the present invention are installed in the high-performance computer system rack schematic representation that is connected with external component;
Fig. 2 is a plug-and-play circuit building-block of logic of the present invention;
Fig. 3 is a filtering decoupling zero circuit logic structural drawing of the present invention;
Fig. 4 is a high-frequency pulsed width modulation control circuit building-block of logic of the present invention.
Embodiment
As shown in Figure 1, the air-cooled control module of 12V direct current of the present invention is installed in the interpolation frame that the cooling service is provided in the high-performance computer system rack, links to each other with the backboard of computer.(pulse width modulation, PWM) control circuit, fan connector are formed, and all are integrated on the printed circuit board by back panel connector, plug-and-play circuit, filtering decoupling zero circuit, high-frequency pulsed width modulation in the present invention.The present invention is connected through back panel connector with System Backplane, is connected through the fan connector between the present invention and the fans.
Back panel connector adopts commercial connector (be like FCI S.A.'s article No. 51700 product), requires the load current ability to be not less than 20A, and signal pin is no less than 6.The backboard of back panel connector and computer system, inner hot-swapping controller, the high-frequency pulsed width modulation control circuit of the present invention link to each other, for other parts of the present invention provide 12V DC electrical source, 3.3V DC electrical source,, electric transmission such as signal be connected; Back panel connector is that (monitor and control unit MCU) realizes keeping watch on control to the fans that links to each other with the present invention passage is provided in the system monitoring unit.
Plug-and-play circuit is connected with back panel connector, filtering decoupling zero circuit; For the present invention overcurrent protection, overvoltage protection, under-voltage protection are provided, power up slowly start, Hot Plug Capability, eliminate the air-cooled control module of 12V direct current power up start and during warm swap to the impact and the interference of busbar voltage.As shown in Figure 2, hot connecting and disconnecting route wave filter, first voltage divider, inspection leakage resistance, hot-swapping controller, timer, second voltage divider and switching tube are formed.Wave filter links to each other with back panel connector, first voltage divider, inspection leakage resistance; The RC eliminator and first diode by routine are formed in parallel; The RC eliminator adopts the resistance of one 10 Ω and the capacitances in series of one 0.1 μ f/25V to form; The resistance of RC circuit all links to each other with back panel connector, first voltage divider, inspection leakage resistance with first diode, and the electric capacity the other end of first diode and RC circuit all is connected with ground.First voltage divider, second voltage divider are in series by first divider resistance and second divider resistance, satisfy the electric current restriction less than 10 μ A, realize the startup threshold design of 10.8V simultaneously.Optional first divider resistance is 60.4k Ω during design, and second divider resistance is 8.45k Ω.The first voltage divider outside links to each other with back panel connector, and inside links to each other with hot-swapping controller, wave filter, inspection leakage resistance.First divider resistance of first voltage divider links to each other with back panel connector, inspection leakage resistance, wave filter, and second divider resistance links to each other with hot-swapping controller.Second voltage divider links to each other with hot-swapping controller, switching tube, filtering decoupling zero circuit, and first divider resistance of second voltage divider links to each other with switching tube, filtering decoupling zero circuit, and second divider resistance of second voltage divider links to each other with hot-swapping controller.The inspection leakage resistance is the resistance of 0.002 a Ω/3W, and the outside links to each other with back panel connector, and inside links to each other with switching tube, hot-swapping controller, wave filter, first voltage divider.Hot-swapping controller links to each other with first voltage divider, inspection leakage resistance, switching tube, second voltage divider, timer; Adopt commercial hot-swapping controller; Its operating voltage >=12V; Operating temperature is 0～70 ℃, has current sense function, has overcurrent protection, overvoltage protection, under-voltage protection simultaneously, regularly starts function.Timer links to each other with hot-swapping controller; Form by first electric capacity of a 1nf/50V and second electric capacity of a 22nf/50V; One end of two electric capacity all links to each other with hot-swapping controller; The equal ground connection of the other end, first electric capacity is used to set the error protection time, and second electric capacity is used to set starting time.Switching tube links to each other with inspection leakage resistance, hot-swapping controller, second voltage divider and filtering decoupling zero circuit, and the employing operating voltage is 30V, operating current>=50A, conduction impedance R
DSThe N-MOS of≤0.01 Ω.
Filtering decoupling zero circuit is connected with plug-and-play circuit, fan connector; As shown in Figure 3; Form by secondary LC eliminator; The first order is a common filter, with switching tube, second voltage divider and first branching filter of plug-and-play circuit ... The L branching filter ... The N branching filter links to each other; The second level by first branching filter ... The L branching filter ... The N branching filter is formed; Link to each other with common filter, fan connector respectively; N is the fan number in the single fan interpolation frame; Depend on computer system Cooling Design and structural design, be generally less than at present and equal 6, N >=L >=1.Common filter adopts traditional LC eliminator, and the LC eliminator of common filter requires inductance value＞500nH, and rated current＞20A requires the capacity＞2.8mf, withstand voltage＞16V of electric capacity.N branching filter is formed in parallel by traditional LC eliminator and a diode; The inductance that the LC eliminator adopts in each branching filter requires to satisfy inductance value＞10 μ H, rated current＞4A; The electric capacity that adopts requires total capacity＞2.3mf, withstand voltage＞16V, and it is 0.2A that second diode of employing requires the withstand voltage 75V of being, forward conduction electric current.This filtering decoupling zero circuit has weakened the interference of fan work electric current to backboard 12V busbar voltage greatly.
The high-frequency pulsed width modulation control circuit is connected with back panel connector, fan connector, and is as shown in Figure 4, is that PWM controller and signal level pre-set circuit and form by PDM keyer.PWM controller and signal level pre-set circuit, back panel connector, fan connector and link to each other, and signal level pre-sets circuit and links to each other with PWM controller, back panel connector.The PWM controller is selected to have communication bus, is no less than N road PWM output, N road TACH input channel, commercial controller with single address wire, and the pwm signal frequency of its output can be operated in＞20KHz, and can be by the user's own setting.The pwm signal of PWM controller is connected with the TACH signaling line with the pwm signal line of N fan through the fan connector respectively with the TACH signal.The SCL pin of PWM controller, SDA pin, FSPEED pin and ALERT pin are connected with back panel connector, and realization is communicated by letter with system MCU.The PWM controller is accepted system MCU through back panel connector and is born the read/write operation order that the result of operation quantitative statistics and the inquiry of system idle condition sends according to temperature acquisition, system in the system, thereby the wind speed of fan is regulated; Report fan state and rotary speed information via back panel connector to system MCU through communication bus simultaneously.The PWM controller is accepted the write operation of MCU to its configuration register through back panel connector, and pulse width modulation frequency is set to 22.5KHz.The VCC pin of PWM controller is connected the acquisition power supply with the GND pin through back panel connector with backboard.Signal level pre-sets circuit and is formed in parallel by 2N+4 resistance.Wherein, resistance one end of 2 2.2k Ω links to each other with the PWM controller, and the other end links to each other with back panel connector, realizes the predefined value of CLK clock SCL, data-signal SDA.Resistance one end of 2 10k Ω links to each other with the PWM controller, and the other end links to each other with back panel connector, realizes the predefined value of interruption/alarm signal A LERT, wind speed signalization FSPEED.Resistance one end of 2N 2.2k Ω links to each other with the fan connector, and the other end links to each other with back panel connector, realizes the predefined value of N pwm signal and N TACH signal.
The fan connector is connected with filtering decoupling zero circuit, high-frequency pulsed width modulation control circuit, fans, is composed in parallel by N the commercial connector of 4 cores.The fan connector requires each contact pin load capacity＞5A.
Claims (7)
1. air-cooled control module of 12V direct current; It is characterized in that the air-cooled control module of 12V direct current is installed in the interpolation frame that the cooling service is provided in the high-performance computer system rack; Linking to each other with the backboard of computer, is that pwm control circuit, fan connector are formed by back panel connector, plug-and-play circuit, filtering decoupling zero circuit, high-frequency pulsed width modulation;
Back panel connector adopts commercial connector; Require the load current ability to be not less than 20A; Signal pin is no less than 6; Back panel connector links to each other with backboard, hot-swapping controller, the high-frequency pulsed width modulation control circuit of computer system, for other parts of the air-cooled control module of 12V direct current provide 12V DC electrical source, 3.3V DC electrical source,, the transmission of signal be connected;
Plug-and-play circuit is connected with back panel connector, filtering decoupling zero circuit, and hot connecting and disconnecting route wave filter, first voltage divider, inspection leakage resistance, hot-swapping controller, timer, second voltage divider and switching tube are formed; Wave filter links to each other with back panel connector, first voltage divider, inspection leakage resistance; Be formed in parallel by the RC eliminator and first diode; The resistance of RC eliminator all links to each other with back panel connector, first voltage divider, inspection leakage resistance with first diode, and the electric capacity the other end of first diode and RC eliminator all is connected with ground; Voltage divider, second voltage divider are in series by first divider resistance and second divider resistance, satisfy the electric current restriction less than 10 μ A, realize the startup threshold design of 10.8V simultaneously; The first voltage divider outside links to each other with back panel connector, and inside links to each other with hot-swapping controller, wave filter, inspection leakage resistance; First divider resistance of first voltage divider links to each other with back panel connector, inspection leakage resistance, wave filter, and second divider resistance of first voltage divider links to each other with hot-swapping controller; Second voltage divider links to each other with hot-swapping controller, switching tube, filtering decoupling zero circuit, and first divider resistance of second voltage divider links to each other with switching tube, filtering decoupling zero circuit, and second divider resistance of second voltage divider links to each other with hot-swapping controller; The inspection leakage resistance is the resistance of 0.002 a Ω/3W, and the outside links to each other with back panel connector, and inside links to each other with switching tube, hot-swapping controller, wave filter, first voltage divider; Hot-swapping controller links to each other with first voltage divider, inspection leakage resistance, switching tube, second voltage divider, timer; Adopt operating voltage>=12V; Operating temperature is 0～70 ℃; Have current sense function, have overcurrent protection, overvoltage protection, under-voltage protection simultaneously, regularly start the commercial hot-swapping controller of function; Timer links to each other with hot-swapping controller; Switching tube links to each other with inspection leakage resistance, hot-swapping controller, second voltage divider and filtering decoupling zero circuit, and the employing operating voltage is 30V, operating current>=50A, conduction impedance R
DSThe N-MOS of≤0.01 Ω;
Filtering decoupling zero circuit is connected with plug-and-play circuit, fan connector, is made up of secondary LC eliminator, and the first order is a common filter, links to each other with switching tube, second voltage divider and N branching filter of plug-and-play circuit; The second level is made up of N branching filter, links to each other with common filter, fan connector respectively; Common filter adopts the LC eliminator, and N branching filter is formed in parallel by LC eliminator and a diode; N is the fan number in the single fan interpolation frame, N >=1;
The high-frequency pulsed width modulation control circuit is connected with back panel connector, fan connector, is that PWM controller and signal level pre-set circuit and form by PDM keyer; PWM controller and signal level pre-set circuit, back panel connector, fan connector and link to each other, and signal level pre-sets circuit and links to each other with PWM controller, back panel connector; The commercial controller that the PWM controller selects to have communication bus, be no less than N road PWM output and N road TACH input channel, have single address wire, the pwm signal frequency of its output can be operated in＞20KHz, and can be by the user's own setting; The pwm signal of PWM controller is connected with the TACH signaling line with the pwm signal line of N fan through the fan connector respectively with the TACH signal; The SCL pin of PWM controller, SDA pin, FSPEED pin and ALERT pin are connected with back panel connector, and realization is communicated by letter with system MCU; The PWM controller is accepted system MCU through back panel connector and is born the read/write operation order that the result of operation quantitative statistics and the inquiry of system idle condition sends according to temperature acquisition, system in the system, thereby the wind speed of fan is regulated; Report fan state and rotary speed information via back panel connector to system MCU through communication bus simultaneously; The PWM controller is accepted the write operation of MCU to its configuration register through back panel connector, and pulse width modulation frequency is set to 22.5KHz; The VCC pin of PWM controller is connected the acquisition power supply with the GND pin through back panel connector with backboard; Signal level pre-sets circuit and is formed in parallel by 2N+4 resistance; Wherein, resistance one end of 2 2.2k Ω links to each other with the PWM controller, and the other end links to each other with back panel connector, realizes the predefined value of CLK clock SCL, data-signal SDA; Resistance one end of 2 10k Ω links to each other with the PWM controller, and the other end links to each other with back panel connector, realizes the predefined value of interruption/alarm signal A LERT, wind speed signalization FSPEED; Resistance one end of 2N 2.2k Ω links to each other with the fan connector, and the other end links to each other with back panel connector, realizes the predefined value of N pwm signal and N TACH signal.
The fan connector is connected with filtering decoupling zero circuit, high-frequency pulsed width modulation control circuit, fans, is composed in parallel by N the commercial connector of 4 cores, and the fan connector requires each contact pin load capacity＞5A.
2. the air-cooled control module of a kind of 12V direct current as claimed in claim 1 is characterized in that said back panel connector, plug-and-play circuit, filtering decoupling zero circuit, high-frequency pulsed width modulation are that pwm control circuit, fan connector all are integrated on the printed circuit board.
3. the air-cooled control module of a kind of 12V direct current as claimed in claim 1 is characterized in that the RC eliminator of the wave filter in the said plug-and-play circuit is made up of the resistance of one 10 Ω and the capacitances in series of one 0.1 μ f/25V.
4. the air-cooled control module of a kind of 12V direct current as claimed in claim 1; It is characterized in that said timer is made up of first electric capacity of a 1nf/50V and second electric capacity of a 22nf/50V; One end of two electric capacity all links to each other with hot-swapping controller, the equal ground connection of the other end.
5. the air-cooled control module of a kind of 12V direct current as claimed in claim 1 is characterized in that the LC eliminator of said common filter requires inductance value＞500nH, and rated current＞20A requires the capacity＞2.8mf, withstand voltage＞16V of electric capacity; The inductance that LC eliminator in N branching filter adopts requires to satisfy inductance value＞10 μ H, rated current＞4A; The electric capacity that adopts requires total capacity＞2.3mf, withstand voltage＞16V, and it is 0.2A that second diode of employing requires the withstand voltage 75V of being, forward conduction electric current.
6. the air-cooled control module of a kind of 12V direct current as claimed in claim 1 is characterized in that said PWM controller accepts the write operation of MCU to its configuration register through back panel connector, and pulse width modulation frequency is set to 22.5KHz.
7. the air-cooled control module of a kind of 12V direct current as claimed in claim 1, first divider resistance that it is characterized in that said first voltage divider, second voltage divider is 60.4k Ω, second divider resistance is 8.45k Ω.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110381414.XA CN102506025B (en) | 2011-11-25 | 2011-11-25 | 12V direct-current air cooling control module |
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| CN201110381414.XA CN102506025B (en) | 2011-11-25 | 2011-11-25 | 12V direct-current air cooling control module |
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| CN102506025B CN102506025B (en) | 2014-03-12 |
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| CN117311293A (en) * | 2023-11-27 | 2023-12-29 | 深圳市凌壹科技有限公司 | Industrial main board based on remote management and control method thereof |
| CN117311293B (en) * | 2023-11-27 | 2024-04-02 | 深圳市凌壹科技有限公司 | Industrial main board based on remote management and control method thereof |
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| CN102506025B (en) | 2014-03-12 |
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