CN204119037U - A kind of multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system - Google Patents
A kind of multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system Download PDFInfo
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- CN204119037U CN204119037U CN201420396804.3U CN201420396804U CN204119037U CN 204119037 U CN204119037 U CN 204119037U CN 201420396804 U CN201420396804 U CN 201420396804U CN 204119037 U CN204119037 U CN 204119037U
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Abstract
The utility model relates to a kind of multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system.This multichannel voltage continuously adjustabe power module comprises: continuously adjustabe voltage segment, and high accuracy many gears current detecting part and multichannel capable of being combined use part.Described adjustable voltage generating portion is connected with output loading, and described current detecting part detects the electric current that this output loading exports.This power module has low-voltage ripple, low EMC, and antijamming capability is strong, and voltage can remote setting and adjustable extent is wide, current detection accuracy advantages of higher, and each module adopts two passages and intermodule can combinationally use, highly versatile.
Description
Technical field
The utility model relates to power module, relates more specifically to a kind of multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system.
Background technology
Power supply is the necessary organic component of present any electronic product, and the quality of power quality directly affects function and the life-span of power consumption equipment.Along with power consumption equipment constantly becomes more meticulous, the variation of function, it is also more and more higher to the requirement of power supply.On current market, the supply power mode of power consumption equipment main flow is external power supply and board mounted power, and output form generally exports based on single channel fixed voltage.The general external power supply of power supply type mostly is AC/DC Switching Power Supply board mounted power based on LDO.But the supply power mode of main flow also exists following deficiency on market:
1. the precision of electric power output voltage and regulation.Particularly the quality requirement of the voltage of the electricity consumption appliance requires of some high-end power consumption equipments especially in display field is high, its ripple requires in full scale lower than 10Mv, and voltage will reach the precision of 0.1%, market seldom there is the power supply that can meet its demand.
2. output power of power supply and volume.High-power small size high efficiency is the theme of power source development forever, and along with the miniaturization of power consumption equipment, microminiaturization is portable type electronic product especially, and its existing power supply of power supply required just is difficult to meet.
3. single channel cannot meet the requirement of the multichannel trend of power consumption equipment high efficiency.
4. cannot realize voltage long-range adjustable controlled on a large scale.
5. versatility and portability are not strong, and current detection accuracy is not high.
Therefore, need to provide a kind of high-quality multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system.
Utility model content
For above the deficiencies in the prior art, a kind of high-quality multichannel voltage continuously adjustabe power module of the utility model and system thereof, to solve unmatched problem between common power on market and various different power consumption equipment.
The utility model adopts following technical proposals:
High-quality multichannel voltage continuously adjustabe power module comprises: continuously adjustabe voltage generation section and current detecting part, described adjustable voltage generating portion is connected with output loading, and set according to the demand of load, described current detecting part detects the electric current that this output loading exports.
Described adjustable voltage generating portion comprises the external power source module connected successively, EMC processing module, chopper circuit module, synchronous rectification module, filtering processing module, output loading module and constant-current source feedback module, the output of described external power source module reduces differential mode and common mode disturbances through EMC processing module, high-frequency pulse voltage is obtained again by high-frequency chopper module, through synchronous rectification module, output filtering module obtains setting the very low voltage of ripple, one output of described constant-current source feedback module is connected with described chopper circuit, another input connects CPU processor, by CPU processor for it provides driver output voltage.
Described current detecting part divides the voltage switch module, measurement range selection module, current sample module, differential amplification module, the A/D modular converter that comprise and connecting successively and compares demarcating module.
The low pass filter that described EMC processing module is made up of differential mode filter inductor is formed.
Described output voltage is: output voltage=K* reference voltage+VREF;
Wherein K is the scale parameter that in circuit, constant-current source is given, and VREF is the reference voltage in power supply control chip.
Continuously adjustabe power-supply system, this power-supply system comprises: motherboard and the some regulated power supply modules be connected with motherboard, and described motherboard carries out exchanges data by serial ports and host computer and gives described regulated power supply module after the voltage required for host computer is carried out D/A conversion.
This power module comprises: continuously adjustabe voltage generation section and current detecting part, and described adjustable voltage generating portion is connected with output loading, and sets according to the demand of load, and described current detecting part detects the electric current that this output loading exports.
Described adjustable voltage generating portion comprises the external power source module connected successively, EMC processing module, chopper circuit module, synchronous rectification module, filtering processing module, output loading module and constant-current source feedback module, the output of described external power source module reduces differential mode and common mode disturbances through EMC processing module, high-frequency pulse voltage is obtained again by high-frequency chopper module, through synchronous rectification module, output filtering module, one output of described constant-current source feedback module is connected with described chopper circuit, another input connects CPU processor, driving voltage is provided for it by CPU processor.
Described current detecting part divides the voltage switch module, measurement range selection module, current sample module, differential amplification module, the A/D modular converter that comprise and connecting successively and compares demarcating module.
The beneficial effects of the utility model are as follows:
The utility model high-quality multichannel voltage continuously adjustabe power module fundamentally solves the problem of the difficult corresponding power consumption equipment maked rapid progress of common power on market, this power module has low-voltage ripple, low EMC, antijamming capability is strong, voltage can remote setting and adjustable extent wide, current detection accuracy advantages of higher.Each module adopts two passages and intermodule can combinationally use, highly versatile.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 illustrates adjustable voltage generating portion structured flowchart.
Fig. 2 illustrates EMC processing module circuit block diagram.
Fig. 3 illustrates current detecting part-structure block diagram.
Fig. 4 illustrates individual module power work block diagram.
Embodiment
In order to be illustrated more clearly in the utility model, below in conjunction with preferred embodiments and drawings, the utility model is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive below, protection range of the present utility model should do not limited with this.
The utility model high-quality multichannel voltage continuously adjustabe power module comprises: continuously adjustabe voltage generation section and current detecting part, described adjustable voltage generating portion is connected with output loading, and described current detecting part detects the electric current that this output loading exports.
If Fig. 1 is adjustable voltage generating portion structure principle chart, described adjustable voltage generating portion comprises the power supply module, EMC processing module, chopper circuit module, synchronous rectification module, filtering processing module, output loading module and the constant-current source feedback module that connect successively, and another output of described constant-current source feedback module is also connected with described chopper circuit.
The principle that output voltage is adjustable is after to be power module receive the bound threshold value of magnitude of voltage that load sends and voltage by serial ports, the setting of corresponding analog to digital converter is carried out by CPU processor, with drive outside constant-current source circuit export required for voltage, and this voltage and bound threshold value compared carry out corresponding action.
The principle that high-precision current detects: power module divides several gears to detect output current.The differential electrical force feed analog to digital converter that each gear electric current is obtained by inspection leakage resistance and strong noise rejection ratio instrument amplifier, CPU is by reading the value of analog to digital converter through corresponding processes and displays out.
Described CPU is to the value process of reading from AD: when each gear of electric power source pair of module makes current detecting, places a lot of test points in each range, and the current value that CPU reads each test point place and actual current value compare and can be depicted as a curve.Power module can measure the electric current of closely actual value according to this slope of a curve and the value read.
Importation module in described Fig. 1 adopts external direct current 24V Power supply.
Electromagnetic compatibility EMC part in described Fig. 1: produce spike to meet load request because input voltage constantly carries out discharge and recharge to storage capacitor in circuit, this pulse spike electric current is as by Fourier expansion, regard as and be made up of very many higher harmonic currents, these harmonic currents will reduce the service efficiency of power-supply device.Solve in rectification circuit and occur that the excessive method of pulse spike electric current adds the low pass filter that is made up of differential mode filter inductor in circuit as Fig. 2.Can the peak value of suppressor pulse electric current effectively with this differential mode filter inductor, thus reduce current harmonics interference.
Described chopper circuit adopts the Buck topology of buck.
Described circuit of synchronous rectification adopts high integration IC as the driving of pulse-width modulation waveform, and frequency is up to 2.2MHZ.Produce by drive IC drive waveform two MOSFET that two-way has time delay complementation, realize synchronous rectification.
Described external constant-current source drawing-in system feedback, produces high-precision reference voltage by controlling external 32 bit processors, and output voltage is provided by formula below, realizes adjustable on a large scale.
Output voltage=K* reference voltage+VREF
Wherein K is the scale parameter that in circuit, constant-current source is given, and VREF is the reference voltage of power supply control chip IC.The constant-current source herein being controlled by CPU to drive is as feedback setting voltage, and this is that power supply of the prior art does not have.Described power supply control chip is the core component of chopper circuit, and for receiving feedback signals, produce pulse width modulated wave, its major function is:
1. the operating frequency of this power supply can be set by non-essential resistance;
2. produce the adjustable waveform (pwm) of pulse duration to drive outside field effect transistor;
3. the electric current of inside and voltage error amplifier can receive electric current in power circuit and voltage sampling signal, form two feedback loops to keep stable output;
4. the overload protection to power circuit is provided.
The output of circuit of synchronous rectification reduces voltage ripple through common and different mode filtering again, reduces electromagnetic interference.
As Fig. 3 illustrates current detecting part-structure schematic diagram, described current detecting part divides the voltage switch module, measurement range selection module, current sample module, differential amplification module, the A/D modular converter that comprise and connecting successively and compares demarcating module.Current detecting is divided into three ranges to carry out, and minimum division value is 1UA.Power supply main body selects range automatically according to the size of load current.
Load voltage adds one-level analog switch after introducing, and this mode is convenient to the control of host computer to current detecting part.
Single-chip microcomputer compares judgement to the AD value sent here, carries out digital filtering by program, and this step significantly can improve the precision that electric current reads.
For the situation needing multiple separate adjustable voltage in an equipment, above-mentioned power module can combinationally use.The power module of multiple combination forms the power-supply system required for an equipment together with motherboard.Motherboard is undertaken being sent to each function power module after exchanges data carries out DA conversion each voltage required for host computer by serial ports and host computer.The electric current and voltage value that motherboard reading modules hands down also compares with set point, and carries out overcurrent accordingly, overvoltage, undervoltage warning.
This module has two passages, and each passage can independently for connect load provides required accurate voltage and can accurately measure the electric current by load.When load system needs plural power voltage source, this module can also the structure of slot produces the multichannel voltage that can set in combination is load supplying.
As Fig. 4 illustrates individual module power work block diagram, for the situation needing multiple separate adjustable voltage in an equipment, above-mentioned continuously adjustabe power module can combinationally use.Multiple power module combines the power-supply system be built into together with motherboard required for an equipment.Motherboard is undertaken being sent to each function power module after exchanges data carries out DA conversion each voltage required for host computer by serial ports and host computer.The electric current and voltage value that motherboard reading modules hands down also compares with set point, and carries out overcurrent accordingly, overvoltage, undervoltage warning.
The power module of combination solves complication system and to power the assorted and problem of unrest.When needing multiple power voltage source for load system, multiple power module just can be connected with power supply motherboard by slot, sets out different voltage with powering load according to the requirement of load.
Obviously; above-described embodiment of the present utility model is only for the utility model example is clearly described; and be not the restriction of execution mode of the present utility model; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all execution modes, every belong to the technical solution of the utility model the apparent change of extending out or variation be still in the row of protection range of the present utility model.
Claims (6)
1. a multichannel voltage continuously adjustabe power module, it is characterized in that, this power module comprises: continuously adjustabe voltage generation section and current detecting part, described adjustable voltage generating portion is connected with output loading, and set according to the demand of load, described current detecting part detects the electric current that this output loading exports;
Described adjustable voltage generating portion comprises the external power source module connected successively, EMC processing module, chopper circuit module, synchronous rectification module, filtering processing module, output loading module and constant-current source feedback module, the output of described external power source module reduces differential mode and common mode disturbances through EMC processing module, high-frequency pulse voltage is obtained again by high-frequency chopper module, through synchronous rectification module, output filtering module obtains setting the very low voltage of ripple, one output of described constant-current source feedback module is connected with described chopper circuit, another input connects CPU processor, by CPU processor for it provides driver output voltage,
Described current detecting part divides the voltage switch module, measurement range selection module, current sample module, differential amplification module, the A/D modular converter that comprise and connecting successively and compares demarcating module.
2. multichannel voltage continuously adjustabe power module according to claim 1, is characterized in that, the low pass filter that described EMC processing module is made up of differential mode filter inductor is formed.
3. multichannel voltage continuously adjustabe power module according to claim 1, it is characterized in that, described output voltage is: output voltage=K* reference voltage+VREF;
Wherein K is the scale parameter that in circuit, constant-current source is given, and VREF is the reference voltage in power supply control chip.
4. a continuously adjustabe power-supply system, it is characterized in that, this power-supply system comprises: motherboard and the multichannel voltage continuously adjustabe power module some as claimed in claim 1 be connected with motherboard, and described motherboard carries out exchanges data by serial ports and host computer and gives described regulated power supply module after the voltage required for host computer is carried out D/A conversion;
This power module described comprises: continuously adjustabe voltage generation section and current detecting part, described adjustable voltage generating portion is connected with output loading, and set according to the demand of load, described current detecting part detects the electric current that this output loading exports;
Described adjustable voltage generating portion comprises the external power source module connected successively, EMC processing module, chopper circuit module, synchronous rectification module, filtering processing module, output loading module and constant-current source feedback module, the output of described external power source module reduces differential mode and common mode disturbances through EMC processing module, high-frequency pulse voltage is obtained again by high-frequency chopper module, through synchronous rectification module, output filtering module, one output of described constant-current source feedback module is connected with described chopper circuit, another input connects CPU processor, driving voltage is provided for it by CPU processor,
Described current detecting part divides the voltage switch module, measurement range selection module, current sample module, differential amplification module, the A/D modular converter that comprise and connecting successively and compares demarcating module.
5. continuously adjustabe power-supply system according to claim 4, is characterized in that, the low pass filter that described EMC processing module is made up of differential mode filter inductor is formed.
6. continuously adjustabe power-supply system according to claim 4, is characterized in that, described output voltage is: output voltage=K* reference voltage+VREF;
Wherein K is the scale parameter that in circuit, constant-current source is given, and VREF is the reference voltage in power supply control chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420396804.3U CN204119037U (en) | 2014-07-17 | 2014-07-17 | A kind of multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system |
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| CN201420396804.3U CN204119037U (en) | 2014-07-17 | 2014-07-17 | A kind of multichannel voltage continuously adjustabe power module and continuously adjustabe power-supply system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699154A (en) * | 2015-02-13 | 2015-06-10 | 四川中测电子科技有限公司 | Adjustable power supply and average-current system with same |
| CN114046375A (en) * | 2020-04-10 | 2022-02-15 | 西南科技大学 | Electromagnetic valve power supply circuit and adjusting method thereof |
-
2014
- 2014-07-17 CN CN201420396804.3U patent/CN204119037U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699154A (en) * | 2015-02-13 | 2015-06-10 | 四川中测电子科技有限公司 | Adjustable power supply and average-current system with same |
| CN104699154B (en) * | 2015-02-13 | 2017-01-11 | 四川中测电子科技有限公司 | Adjustable power supply and average-current system with same |
| CN114046375A (en) * | 2020-04-10 | 2022-02-15 | 西南科技大学 | Electromagnetic valve power supply circuit and adjusting method thereof |
| CN114046375B (en) * | 2020-04-10 | 2023-08-01 | 西南科技大学 | Electromagnetic valve power supply circuit and adjusting method thereof |
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Address after: 215000 Qingqiu Lane 8, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Suzhou Huaxing source Polytron Technologies Inc Address before: 215000 East Fang Industrial Park Building No. 1 Huayun Road, Suzhou Industrial Park, Jiangsu Province Patentee before: Suzhou HYC Electronic Technology Co., Ltd. |