CN105827111B - The power circuit and its operating method of Auto-matching load group number in parallel - Google Patents
The power circuit and its operating method of Auto-matching load group number in parallel Download PDFInfo
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- CN105827111B CN105827111B CN201610368833.2A CN201610368833A CN105827111B CN 105827111 B CN105827111 B CN 105827111B CN 201610368833 A CN201610368833 A CN 201610368833A CN 105827111 B CN105827111 B CN 105827111B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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Abstract
The present invention relates to power circuits and its operating method that Auto-matching loads group number in parallel, which includes current sampling circuit, load feedback circuit and power inverter, and power inverter is equipped with multiple load outputs；Current sampling circuit, using the signal as the input signal of load feedback module, is connect with power inverter and load feedback circuit respectively for acquiring the current signal that power inverter is exported；Load feedback circuit will determine that result is sent in power inverter, connect with power inverter for carrying out judging that corresponding load channel whether there is to input signal.After the present invention is acquired by the channel output current value to power inverter, it is carried out judging that load channel whether there is by load feedback circuit, by the signal transmission of gained after load feedback circuit judges to power inverter, realize the adjustment to the output current of power inverter, output current and power are classification adjustment, precision is high, facilitates user to classify and uses, cost is relatively low.
Description
Technical field
The present invention relates to Switching Power Supplies, more specifically refer to the power circuit and the electricity of Auto-matching load group number in parallel
The operating method of source circuit.
Background technology
In electronic equipment of today, to meet the power demands of different electronic devices, generally can all multiple power supplies be selected to supply
Electricity.
Multiple-channel output LED power common practice is to export to be equipped with one group of DC-DC converter on every road at present.It is exported per road
It is equipped with one group of DC-DC converter, independence of this structure per road is fine, but need to use multiple converters, of high cost.
Related patents are searched on the websites soopat using " matched load is in parallel " and " circuit " keyword, share 105
, wherein Chinese patent 201210545511.2 discloses a kind of constant current driving high-voltage LED circuit of 220V tunable opticals, special
Sign is, including AC power, for providing 220V alternating currents；Rectifier circuit is connected to the AC power and Constant Electric Current
Between road, constant-current circuit is supplied to for direct current will to be converted into after the AC rectification from the AC power；Constant Electric Current
Road, for providing constant current to LED load circuit to drive each LED load；LED load circuit, including multiple LED are negative
It carries, and the multiple LED load is connected in series with；Wherein, the AC power, the rectifier circuit, the constant-current circuit
And the LED load circuit is connected in series with.Above-mentioned constant current driving high-voltage LED circuit can match commercial standard type thyristor regulating
The advantages of light device dims to realize, and reliable with circuit performance, at low cost, good dimming effect.
Above-mentioned patent does not refer to how Auto-matching load is in parallel and organizes number, it is therefore necessary to design a kind of power supply electricity
Road realizes Auto-matching load group number in parallel, lowers production cost.
Invention content
It is an object of the invention to overcome the deficiencies of existing technologies, the power circuit of Auto-matching load group number in parallel is provided
And its operating method.
To achieve the above object, the present invention uses following technical scheme：
The power circuit of Auto-matching load group number in parallel, including current sampling circuit, load feedback circuit and power
Converter, the power inverter have multiple load outputs；
The current sampling circuit is for acquiring the current signal that power inverter is exported, using the current signal as negative
Carry feedback module input signal, the current sampling circuit respectively with the power inverter and the load feedback circuit
It is electrically connected；
The load feedback circuit is used for the load channel that is carried out corresponding to judgement input signal to each input signal
No presence, and will determine that result is sent in the power inverter, the load feedback circuit and power inverter electricity
Property connection.
The load feedback circuit includes that several are used for sampled signal and reference signal comparison to obtain load channel
The comparator for the result that whether there is, for the comparator relatively after result carry out cumulative accumulator and be used for
The load channel signal of gained, which is converted to feedback signal to adjust the output current of power inverter, to be judged to the accumulator
Control circuit, the input terminal of the comparator are electrically connected with the current sampling circuit, the output of several comparators
End is connect with the input terminal of the accumulator, and the output end of the accumulator and the input terminal of the control circuit are electrically connected,
The output end of the control circuit is electrically connected with the power inverter.
Amplitude limiter circuit, the amplitude limit electricity are connected between the output end of the accumulator and the input terminal of the control circuit
Road includes limiter and rate converter, and the input terminal of the limiter and the output end of the accumulator are electrically connected, institute
State the input terminal of rate converter and the output end of the limiter be electrically connected, the output end of the rate converter with it is described
The input terminal of control circuit is electrically connected.
Its further technical solution is：The control circuit includes operational amplifier, the operational amplifier it is same mutually defeated
Enter end and the output end of the rate converter is electrically connected, the output end of the operational amplifier and power inverter electricity
Property connection.
Its further technical solution is：The current sampling circuit includes current sampler, the current sampler it is defeated
Outlet and the input terminal of the comparator are electrically connected, the output of the input terminal of the current sampler and the power inverter
End is electrically connected.
Its further technical solution is：The load outputs of the power inverter are connected with LED light emitting device.
The present invention also provides the operating methods that Auto-matching loads the power circuit of group number in parallel, are as follows：
Step 1. carries out the output current on the load outputs of power inverter using resistance the sampling of current signal,
Obtain sample rate current；
Step 2. sample rate current is compared by comparing device and reference current, right if sample rate current is more than reference current
The comparator answered exports a fixed level Vc, and otherwise corresponding comparator exports 0V；The comparator output of the roads n is asked by accumulator
With obtain the voltage value m*Vc for embodying effective load channel sum m；
For step 3. when the voltage value that accumulator obtains is 0, wherein one high level of limiter output makes operation amplifier
The minimum electric current of device output, feeds back to power converter, is converted into the matched voltage output of load institute all the way, reaches automatic
Effect with load group number in parallel.
Its further technical solution is：In the step 2, if the sum of accumulator is 0, the minimum electricity of limiter output
Flat Vc, by the level of amplitude limit multiplied by COEFFICIENT K appropriate, the current setting value of obtained K*m*Vc as control circuit.
Compared with the prior art, the invention has the advantages that：The power supply electricity of the Auto-matching load group number in parallel of the present invention
After being acquired by the channel output current value to power inverter, judgement load channel is carried out by load feedback circuit for road
It whether there is, then realized to power inverter to power inverter by the signal transmission obtained by after load feedback circuit judges
The adjustment of output current, output current are classification adjustment, and power is also classification adjustment, and power accuracies at different levels are higher to facilitate use
Family classification uses, and cost is relatively low.
The invention will be further described in the following with reference to the drawings and specific embodiments.
Description of the drawings
Fig. 1 is the schematic diagram of the power circuit for the Auto-matching load group number in parallel that the specific embodiment of the invention provides；
Fig. 2 is the schematic diagram (electricity of the power circuit for the Auto-matching load group number in parallel that the specific embodiment of the invention improves
Source circuit is two-way output power supply circuit).
Reference numeral
10 power inverter, 20 comparator
30 accumulator, 40 limiter
50 rate converter, 60 control circuit
Specific implementation mode
In order to more fully understand the present invention technology contents, with reference to specific embodiment to technical scheme of the present invention into
One step introduction and explanation, but not limited to this.
The specific embodiment as shown in Fig. 1~2, the power supply electricity of Auto-matching load group number in parallel provided in this embodiment
Road can be used in the power circuit of product, for example, multigroup output charging circuit, realize Auto-matching load group in parallel
Number lowers production cost.
The power circuit of Auto-matching load group number in parallel, including current sampling circuit, load feedback circuit and power
Converter 10, wherein power inverter 10 has multiple load outputs, and current sampling circuit is for acquiring power inverter 10
The current signal exported, using the current signal as the input signal of load feedback module, current sampling circuit respectively with work(
Rate converter 10 and load feedback circuit are electrically connected；Load feedback circuit to each input signal for carrying out judgement input
Load channel corresponding to signal whether there is, and will determine that result is sent in power inverter 10, load feedback circuit with
Power inverter 10 is electrically connected.
By load feedback circuit judges, this channel load whether there is current output value, judge that architecture signals feed back to work(
Rate converter 10 is adjusting output current by power inverter 10, and the output current of such power inverter 10 can be according to defeated
Go out the way adjust automatically of load.
The power circuit of above-mentioned Auto-matching load group number in parallel, passes through the channel output current to power inverter 10
After value is acquired, carried out judging that load channel whether there is by load feedback circuit, then by institute after load feedback circuit judges
The signal transmission obtained realizes that the adjustment to the output current of power inverter 10, output current are classifications to power inverter 10
Adjustment, power is also classification adjustment, and power accuracies at different levels are higher to facilitate user's classification to use, and cost is relatively low.
It is used to compare sampled signal and reference signal to obtain specifically, above-mentioned load feedback circuit includes several
The comparator 20 for the result that load channel whether there is carries out cumulative accumulator for the result after comparing comparator 20
30 and for accumulator 30 judge gained load channel signal be converted to feedback signal to adjust power inverter 10
The control circuit 60 of output current, wherein the input terminal of comparator 20 is electrically connected with current sampling circuit, several comparators
20 output end is connect with the input terminal of accumulator 30, and the output end of accumulator 30 electrically connects with the input terminal of control circuit 60
It connects, output end and the power inverter 10 of control circuit 60 are electrically connected；In this way, current sampling circuit obtains each channel output
Current value, current value judge that this channel load whether there is by comparing device 20 compared with set reference threshold, work as electric current
Comparator 20 exports a fixed level Vc and otherwise exports 0V when value is more than a reference value, and the output of the roads n comparator 20 passes through accumulator
30 summations obtain the voltage value m*Vc for embodying effective load channel sum m, and the output current of such power inverter 10 can root
According to the way adjust automatically of output loading.
Further, Finite Amplitude electricity is connected between the output end and the input terminal of control circuit 60 of above-mentioned accumulator 30
Road, the amplitude limiter circuit include limiter 40 and rate converter 50, the output of the input terminal and accumulator 30 of the limiter 40
End is electrically connected, and the input terminal of rate converter 50 is electrically connected with the output end of limiter 40, the output of rate converter 50
End and the input terminal of control circuit 60 are electrically connected, and the electric current that rate converter 50 is used to export limiter 40 is amplified
Or diminution processing, so that it meets the input current value of control circuit 60；It is 1 tunnel, that is, Vc that limiter 40, which limits minimum levels,
It can cause start for 0 to avoid sum, by the level Vc of amplitude limit multiplied by COEFFICIENT K appropriate, obtained K*m*Vc
Current setting value as control circuit 60.
In addition, control circuit 60 includes operational amplifier, in-phase input end and the rate converter 50 of operational amplifier
Output end is electrically connected, and output end and the power inverter 10 of operational amplifier are electrically connected, and operational amplifier is power conversion
The current control unit of device 10, when the current setting value of operational amplifier changes, the electric current of power inverter 10 is also sent out
Changing has the function that adapt to load so that the electric current of output changes.
The current signal of operational amplifier is the current control unit of input and output electric current, when the output voltage of accumulator 30
When changing, the voltage of the output end of corresponding rate converter 50 also changes, which passes through operational amplifier
After feed back to power inverter 10, to change the control electric current of power inverter 10, reach 10 Auto-matching of power inverter
The effect of load group number in parallel.
In the present embodiment, in order to the comparison of sampled current signals plus hysteresis loop appropriate with stabilization, comparator
20 are parallel with resistance.
In the present embodiment, above-mentioned current sampling circuit includes current sampler, the output end of current sampler with than
Input terminal compared with device 20 is electrically connected, and the input terminal of current sampler is electrically connected with the output end of power inverter 10.
Specifically, in the present embodiment, current sampler is resistance, output current resistance sampling adopts to obtain signal Is, then
Is is shown that load whether there is by the comparison of comparator 20.
Certainly, in other embodiment, current sampler can be ammeter etc., it is not limited to electricity provided in this embodiment
Resistance.
In the present embodiment, the load outputs of power inverter 10 are connected with LED light emitting device.
Certainly, in other embodiment, the load outputs of power inverter 10 can connect other loads, such as engine etc.
Element, it is not limited to LED light emitting device provided in this embodiment.
The present invention also provides the operating methods that Auto-matching loads the power circuit of group number in parallel, are as follows：
Step 1. carries out adopting for current signal using resistance to the output current on the load outputs of power inverter 10
Sample obtains sample rate current；
Step 2. sample rate current is compared by comparing device 20 and reference current, if sample rate current is more than reference current,
Corresponding comparator 20 exports a fixed level Vc, and otherwise corresponding comparator 20 exports 0V；The output of the roads n comparator 20 passes through
The summation of accumulator 30 obtains the voltage value m*Vc for embodying effective load channel sum m；
For step 3. when the voltage value that accumulator 30 obtains is 0, wherein one high level of the output of limiter 40 makes operation
The minimum electric current of amplifier output, feeds back to power converter, is converted into the matched voltage output of load institute all the way, reaches certainly
The effect of dynamic matched load parallel connection group number.
Further, in step 2, if the sum of accumulator 30 is 0, limiter 40 exports minimum levels Vc, warp
The level of amplitude limit is crossed multiplied by COEFFICIENT K appropriate, current setting values of the obtained K*m*Vc as control circuit 60.
Fig. 2 is the embodiment that LED power circuit is exported using a two-way of the technical program.
In this embodiment, limiter 40 includes diode and field-effect tube, wherein diode is connected to comparator 20
Output end and the input terminal of accumulator 30 between, the grid of field-effect tube is connect with the output point of comparator 20, field-effect tube
Drain electrode and the in-phase input end of operational amplifier connect, the source electrode of field-effect tube ground connection.
Further, above-mentioned field-effect tube is N-channel enhancement mode FET.
The operation principle for exporting LED power circuit Auto-matching load group number in parallel is as follows：Two-way output current is used respectively
Resistance R1, R2 sampling, adopts to obtain signal Is1, Is2.Comparator X1, X2 respectively make comparisons to Is 1, Is2 with benchmark Vref1, R7,
R8 is to compare plus hysteresis loop appropriate with stabilization.The output of two-way comparator is through diode D1, diode D2 with "or" logic
Control field-effect tube Q1.When Is1, Is2 are arbitrarily less than set benchmark all the way, one of comparator output high level makes Q1 lead
It is logical.Operational amplifier X3 is the current control unit of power inverter 10.Sampled signal Is1, Is2 is superimposed to obtain through R12, R13
Embody the voltage of two-way output total current.Vref2 is input to amplifier X3 as total current setting signal through R14.Work as field-effect tube
Current setting value is the current value of two-way load when Q1 is turned off, and when field-effect tube Q1 is connected, is divided, is given to by R11, R14
The current setting value of X3 is changed to half, that is, the current value loaded all the way.The power supply output two when there are two-way load in this way
The electric current (field-effect tube Q1 shutdowns) on road, the electric current of power supply output all the way when only loading all the way, when field-effect tube Q1 is connected
When, achieve the effect that automatic adaptation load.
In above-mentioned operation principle, diode D1, D2 and field-effect tube Q1 play accumulator 30 and limiter 40
Effect.
It is above-mentioned only with embodiment come the technology contents that further illustrate the present invention, in order to which reader is easier to understand, but not
It represents embodiments of the present invention and is only limitted to this, any technology done according to the present invention extends or recreation, by the present invention's
Protection.Protection scope of the present invention is subject to claims.
Claims (6)
1. the power circuit of Auto-matching load group number in parallel, which is characterized in that including current sampling circuit, load feedback circuit
And power inverter, the power inverter have multiple load outputs；The current sampling circuit is for acquiring power
The current signal that converter is exported, using the current signal as the input signal of load feedback module, the current sample electricity
Road is electrically connected with the power inverter and the load feedback circuit respectively；
The load feedback circuit to each input signal for judge whether the load channel corresponding to input signal is deposited
, and will determine that result is sent in the power inverter, the load feedback circuit electrically connects with the power inverter
It connects；
The load feedback circuit includes that several are used for sampled signal and reference signal comparison whether to obtain load channel
The comparator of existing result, for the comparator relatively after result carry out cumulative accumulator and for institute
It states accumulator and judges that the load channel signal of gained is converted to feedback signal to adjust the control of the output current of power inverter
Circuit, the input terminal of the comparator and the current sampling circuit are electrically connected, the output end of several comparators with
The input terminal of the accumulator connects, and the output end of the accumulator and the input terminal of the control circuit are electrically connected, described
The output end of control circuit is electrically connected with the power inverter；
Amplitude limiter circuit, the amplitude limiter circuit packet are connected between the output end of the accumulator and the input terminal of the control circuit
Limiter and rate converter are included, the input terminal of the limiter and the output end of the accumulator are electrically connected, the ratio
The input terminal of example converter is electrically connected with the output end of the limiter, the output end of the rate converter and the control
The input terminal of circuit is electrically connected.
2. the power circuit of Auto-matching load group number in parallel according to claim 1, which is characterized in that the control electricity
Road includes operational amplifier, and the in-phase input end of the operational amplifier and the output end of the rate converter are electrically connected,
The output end of the operational amplifier is electrically connected with the power inverter.
3. the power circuit of Auto-matching load group number in parallel according to claim 1, which is characterized in that the electric current is adopted
Sample circuit includes current sampler, and the output end of the current sampler and the input terminal of the comparator are electrically connected, described
The input terminal of current sampler and the output end of the power inverter are electrically connected.
4. loading the power circuit of group number in parallel according to claim 1-3 any one of them Auto-matchings, which is characterized in that institute
The load outputs for stating power inverter are connected with LED light emitting device.
5. a kind of operating method of the power circuit of Auto-matching load group number in parallel of claim 1-4 any one of them,
It is characterized in that, is as follows：
Step 1. carries out the output current on the load outputs of power inverter using resistance the sampling of current signal, obtains
Sample rate current；
Step 2. sample rate current is compared by comparing device and reference current, corresponding if sample rate current is more than reference current
Comparator exports a fixed level Vc, and otherwise corresponding comparator exports 0V；The comparator output of the roads n is summed by accumulator
Go out the voltage value m*Vc for embodying effective load channel sum m；
For step 3. when the voltage value that accumulator obtains is 0, wherein one high level of limiter output so that operational amplifier is defeated
Go out minimum electric current, feed back to power converter, is converted into the matched voltage output of load institute all the way, it is negative to reach Auto-matching
Carry the effect of group number in parallel.
6. the operating method of the power circuit of Auto-matching load group number in parallel according to claim 5, which is characterized in that
In the step 2, if the sum of accumulator is 0, limiter exports minimum levels Vc, by the level of amplitude limit multiplied by suitable
When COEFFICIENT K, current setting values of the obtained K*m*Vc as control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610368833.2A CN105827111B (en) | 2016-05-27 | 2016-05-27 | The power circuit and its operating method of Auto-matching load group number in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610368833.2A CN105827111B (en) | 2016-05-27 | 2016-05-27 | The power circuit and its operating method of Auto-matching load group number in parallel |
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| CN105827111A CN105827111A (en) | 2016-08-03 |
| CN105827111B true CN105827111B (en) | 2018-09-18 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674693B (en) * | 2009-10-01 | 2012-07-18 | 英飞特电子（杭州）有限公司 | Multichannel constant-current control circuit applicable to LED driver |
| WO2013186655A2 (en) * | 2012-06-14 | 2013-12-19 | Koninklijke Philips N.V. | Self-adjusting lighting driver for driving lighting sources and lighting unit including self-adjusting lighting driver |
| CN102905443B (en) * | 2012-10-31 | 2014-12-10 | 上海小糸车灯有限公司 | Linear constant-current and current-sharing LED drive circuit and circuit board structure thereof |
| CN105813268B (en) * | 2016-05-04 | 2018-05-08 | 杭州上达光电科技有限公司 | The light-source system of LED load light source automatic identification |
| CN205792243U (en) * | 2016-05-27 | 2016-12-07 | 深圳市赢新光电发展有限公司 | Auto-matching load the power circuit of joint group number |
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Effective date of registration: 20170531 Address after: 518000 Guangdong city of Shenzhen province Nanshan District West Road No. 1061 white Rayson Applicant after: Shenzhen Moso Power Electronics Technology Co., Ltd. Address before: 518000, Shiyan City, Guangdong, Baoan District Province, on the north side of the high-speed overpass, on the west side of the highway, the 2 floor of the 6 floor, the east side of the building on the east side of Shenzhen Applicant before: Wintek Electronics Technology Limited |
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