CN201203812Y - Adjustable constant-voltage constant-current power supply - Google Patents
Adjustable constant-voltage constant-current power supply Download PDFInfo
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- CN201203812Y CN201203812Y CNU2008200545450U CN200820054545U CN201203812Y CN 201203812 Y CN201203812 Y CN 201203812Y CN U2008200545450 U CNU2008200545450 U CN U2008200545450U CN 200820054545 U CN200820054545 U CN 200820054545U CN 201203812 Y CN201203812 Y CN 201203812Y
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Abstract
The utility model relates to an adjustable constant voltage constant current power supply, belonging to an automatic control and electric device domain. The adjustable constant voltage constant current power supply comprises a voltage control unit, a current control unit or the like, wherein the voltage control unit is composed of a voltage setting unit and an operational amplifier and the current control unit is composed of a current setting unit and a power driving unit. The undulatory DC voltage is input into the adjustable constant voltage constant current power supply and the DC power with adjustable standard voltage and current, constant output voltage or current is output. The output character of the adjustable constant voltage constant current power supply is a rather ideal rectangular curve. The adjustable constant voltage constant current power supply only uses semiconductor device and resistor capacitor unit and has features of simple structure, low cost, stable performance, high precision, quick response speed, high reliability, liability to integrate, with wire application value in the fields of laboratory, electric device, power products or the like.
Description
Technical field
The utility model relates to a kind of adjustable constant voltage constant current power (abbreviation regulated power supply), belongs to control and electronic device field automatically.
Background technology
Power supply is as the ingredient in an autonomous device or the electronic equipment in laboratory, electronics, its effect is extremely important, its cost also occupies the sizable ratio of equipment total cost, and its reliability, stability have very important influence to the normal operation of electronic equipment especially with work.
Direct voltage source is a power supply the most commonly used, and some has simple current limit function, owing to the reason of current limliting precision with the output response speed is not suitable for using as voltage source and current source simultaneously.
The power supply that has the degree of precision current-limiting function can be simultaneously as voltage source and current source, and can be used as the power supply that battery charger uses, but its circuit is comparatively complicated, cost is higher.
Summary of the invention
The purpose of this utility model relates to a kind of adjustable constant voltage constant current power.
The purpose of this utility model is achieved through the following technical solutions.
A kind of adjustable constant voltage constant current power is made up of with resistance R 1, diode D1 Control of Voltage link, Current Control link.The Control of Voltage link has an earth terminal vg10, power end vp11, two signal end vs12 and vs13.The Current Control link has a power input cp21, signal end cs22, a power output end cp23.The earth terminal vg10 ground connection that it is characterized in that the Control of Voltage link, the power end vp11 of Control of Voltage link is connected the DC input voitage source simultaneously with the power input cp21 of Current Control link, the signal end vs12 of Control of Voltage link connects power supply output by resistance R 1, and the signal end vs13 of Control of Voltage link is connected with the signal end cs22 of Current Control link.The power output end cp23 of Current Control link connects power supply output.Diode D1 is connected across between power supply output and the ground connection, and promptly the positive ending grounding of D1, negative terminal connect power supply output.Adjustable constant voltage constant current power structured flowchart as shown in Figure 1.
Above-mentioned Control of Voltage link demarcates the unit by voltage and 1 two parts of operational amplifier A are formed (as shown in Figure 2).Voltage is demarcated the unit an earth terminal bg110, power end bp111, a signal end bs112.Described Control of Voltage link, it is characterized in that described voltage demarcates the earth terminal bg110 of unit and meet earth terminal vg10 into the Control of Voltage link, the power end bp111 of voltage demarcation unit meets the power end vp11 into the Control of Voltage link, and the signal end bs112 that voltage is demarcated the unit is connected with the negative input end of amplifier A1.The positive input termination of amplifier A1 is the signal end vs12 of Control of Voltage link, and the output termination of amplifier A1 is the signal end vs13 of Control of Voltage link.
Described voltage is demarcated the unit and is formed (Fig. 4) by resistance R 110, capacitor C 111, stabilivolt D111, variable resistor R111.An end that it is characterized in that described resistance R 110 is connected with the negative terminal of stabilivolt D111, be that R110 connects with D111, another termination of resistance R 110 is the power end bp111 that voltage is demarcated the unit, the positive termination of stabilivolt D111 is the earth terminal bg110 that voltage is demarcated the unit, capacitor C 111 is in parallel with stabilivolt D111, the stiff end of variable resistor R111 is connected across the two ends of stabilivolt D111, and the adjustable termination of variable resistor R111 is the signal end bs112 that voltage is demarcated the unit.
Above-mentioned Current Control link is formed (as shown in Figure 3) by calibration with current signal unit, two parts of power drive unit.There are a power end dp211, two signal end ds210 and ds212 in the calibration with current signal unit.Power drive unit has a power input end qp221, signal end qs222, a power take-off qp223.Described Current Control link, the signal end ds210 that it is characterized in that described calibration with current signal unit meets the signal end cs22 into the Current Control link, the power end dp211 of calibration with current signal unit is connected with the power input end qp221 of power drive unit and meets power input cp21 into the Current Control link, and the signal end ds212 of calibration with current signal unit is connected with the signal end qs222 of power drive unit.The power take-off qp223 of power drive unit connects and is current regulator economize on electricity source output terminal cp23.
(Fig. 5) formed by resistance R 210, stabilivolt D211, variable resistor R211 in described calibration with current signal unit.An end that it is characterized in that described resistance R 210 is connected with the anode of stabilivolt D211, be that R210 connects with D211, another termination of resistance R 210 is the signal end ds210 of calibration with current signal unit, the negative terminal of stabilivolt D211 meets the power end dp211 into the calibration with current signal unit, the stiff end of variable resistor R211 is connected across the two ends of stabilivolt D211, and the adjustable termination of variable resistor R211 is the signal end ds212 of calibration with current signal unit.
Described power drive unit is formed (Fig. 6) by operational amplifier A 2, high power valve Tp and stabilivolt D221, resistance R 221, R222, R223.The positive input termination that it is characterized in that described amplifier A2 is the signal end qs222 of power drive unit, the negative input end of amplifier A2 is connected by the emitter of resistance R 221 with high power valve Tp, the output terminal of amplifier A2 is connected by the grid of resistance R 222 with high power valve Tp, stabilivolt D221 is connected across between the grid and emitter of high power valve Tp, the emitter of high power valve Tp meets power input end qp221 into power drive unit by resistance R 223, and the collector of high power valve Tp meets the power take-off qp223 into power drive unit.
Adjustable constant voltage constant current power circuit structure schematic diagram as shown in Figure 7, the power supply that voltage is demarcated the unit provides working current through current-limiting resistance R110 for stabilivolt D111, stabilivolt D111 and capacitor C 111 keep a stable DC reference voltage V Z1, and variable resistor R111 then exports one and stablizes adjustable constant voltage value nominal voltage.
The output voltage that voltage is demarcated the unit is that nominal voltage U1 is:
U
1＝K
1V
z1
K1 is the adjusting ratio of variable resistor R111 in the formula, and the scope of K1 is: 0～1.The scope that is the output voltage of voltage demarcation unit is: 0～VZ1.Can seal in the setting range of the method restriction constant voltage value nominal voltage setting of resistance at the variable resistor stiff end.
The output voltage of Control of Voltage link amplifier A1 and the two pressure reduction of supply voltage of calibration with current signal unit are output current regulation voltage in calibration with current signal unit through resistance R 210 with variable resistor R211, stabilivolt D211 enters the amplitude limit state when pressure reduction is enough big, this moment, stabilivolt D211 kept a stable DC reference voltage V Z2, and variable resistor R211 then exports one and stablizes adjustable constant current value nominal voltage (with respect to power supply potential).
When the calibration with current signal unit entered the amplitude limit state, the output voltage of calibration with current signal unit (with respect to power supply potential) was that constant current value nominal voltage U2 is:
U
2＝K
2V
z2
K2 is the adjusting ratio of variable resistor R211 in the formula, and the scope of K2 is: 0～1.The scope that is the output voltage of calibration with current signal unit is: 0～VZ2.Can seal in the setting range of the method restriction constant current value nominal voltage setting of resistance at the variable resistor stiff end.
The amplifier A2 of power drive unit, high power transistor Tp, stabilivolt D221 and resistance R 221, R222, R223 form a voltage-current converter circuit.Owing to the degenerative effect of amplifier A2, its positive-negative input end voltage is consistent during work, i.e. the pressure drop of resistance R 223 (Tp emitter current potential is with respect to power supply potential) is consistent with the output voltage (with respect to power supply potential) of calibration with current signal unit.
When load gentlier be load current hour, output supply voltage is through resistance R 1, amplifier A1, R210, R211, amplifier A2, R222, high power valve Tp output supply voltage again, form a negative feedback, it is consistent to make output supply voltage value and voltage demarcate the unit output voltage values.Electric power output voltage equals nominal voltage:
U
o＝U
1＝K
1V
z1
When load is heavier is output supply voltage value when being lower than voltage and demarcating the unit output voltage values, and amplifier A1 exports a low level, and the calibration with current signal unit enters the amplitude limit state, and electric power outputting current equals the respective value of constant current value nominal voltage and promptly demarcates electric current.Electric power outputting current is:
The output characteristics of adjustable constant voltage constant current power is a comparatively desirable rectangular curve, as shown in Figure 8.
The power supply connection of operational amplifier A 1 and A2: negative power end ground connection, the positive supply termination DC input voitage source of amplifier A1 and A2, as shown in Figure 9.Input supply voltage can allow to fluctuate in certain scope, and its maximal value is in the supply voltage scope that amplifier A1 and A2 allow.
The value of resistance R 110, R111, R210, R211 (but being not limited to) is usually got 5K Ω～50K Ω.The value of resistance R 1, R221, R222 (but being not limited to) is usually got 0 Ω～50K Ω, gets 0 Ω and is equivalent to use the lead short circuit.The value of resistance R 223 (but being not limited to) is usually got 0.1 Ω～100 Ω.
High power valve Tp (but being not limited to) usually adopts insulated gate bipolar transistor IGBT or power field effect pipe MOSFET.
The another kind of form of adjustable constant voltage constant current power is the negative supply form, and its circuit structure schematic diagram as shown in figure 10.Compare with the adjustable constant voltage constant current power of positive supply form polarity except that high power valve different, all the other components and parts are all identical, circuit structure is basically identical also.
Adjustable constant voltage constant current power is input as the DC voltage of fluctuation, be output as nominal voltage and demarcate that electric current is adjustable, the direct supply of output voltage or current constant.
The adjustable constant voltage constant current power of the utility model only adopts semiconductor devices and Resistor-Capacitor Unit to constitute, have simple in structure, with low cost, stable performance, precision height, response speed is fast, reliability is high, be easy to characteristics such as integrated, in the laboratory, field such as electronics, the power supply product value that has a wide range of applications.
Description of drawings
Fig. 1 is adjustable constant voltage constant current power structured flowchart.
Fig. 2 Control of Voltage link structured flowchart.
Fig. 3 Current Control link structured flowchart.
Fig. 4 voltage is demarcated the element circuit structural drawing.
Fig. 5 calibration with current signal element circuit structural drawing.
Fig. 6 power drive unit circuit structure diagram.
Fig. 7 is adjustable constant voltage constant current power basic circuit structure schematic diagram.
Constant voltage constant current power output characteristics that Fig. 8 is adjustable.
Fig. 9 is adjustable constant pressure and flow positive supply circuit structure schematic diagram.
Figure 10 is adjustable constant pressure and flow negative supply circuit structure schematic diagram.
The constant pressure and flow driving power of Figure 11 variable resistive load.
Figure 12 has the reserve D.C. regulated power supply of uninterrupted power supply function.
Constant voltage constant current power varying duty output characteristics that Figure 13 is adjustable.
The adjustable constant voltage constant current power of Figure 14 is to the charging curve of battery charge.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
The constant pressure and flow driving power of variable resistive load, circuit as shown in figure 11.
The primary source power supply that adjustable constant voltage constant current power is made up of step-down transformer, rectifier bridge, filter capacitor.
Adjustable constant voltage constant current power adopts the positive supply form, and output meets variable resistor load RL.
When pull-up resistor RL changed, the output voltage of adjustable constant voltage constant current power, output current, output power curve were as shown in figure 13.
The resistance of output voltage, output current, output power curve turning point correspondence is:
Uo is that nominal voltage, Io are for demarcating electric current in the formula.
When pull-up resistor RL resistance than Rz hour, constant voltage constant current power is in the constant current output state, voltage and power increase with the increase of resistance value, voltage or power and resistance are linear.
When pull-up resistor RL resistance was big than Rz, constant voltage constant current power was in the constant voltage output state, and electric current and power reduce with the increase of resistance value, and electric current or power and resistance are the hyperbolic relation.
Embodiment 2
Reserve D.C. regulated power supply with uninterrupted power supply function is made up of two adjustable constant voltage constant current powers and rechargeable battery and diode, and circuit as shown in figure 12.
Two adjustable constant voltage constant current powers adopt the positive supply form, charging is received rechargeable battery E with adjustable constant voltage constant current power output by diode, battery E and direct voltage source insert the adjustable constant voltage constant current power of output by diode respectively, and output is exported required D.C. regulated power supply with adjustable constant voltage constant current power.
When direct voltage source was imported, charging was charged to battery with adjustable constant voltage constant current power, and output is used direct voltage source to import with adjustable constant voltage constant current power and exported a constant voltage dc source.
Charging with output voltage, the output current curve of adjustable constant voltage constant current power be charging curve as shown in figure 14.
The phase one of charging is the constant-current charge stage, and to keep the constant of power supply setting promptly to demarcate electric current constant for charging current in this stage, and voltage is along with the carrying out of charging progressively raises.When treating that voltage is increased to the supply voltage calibration value, charging enters subordinate phase.
The subordinate phase of charging is the constant-voltage charge stage, and the constant of charging voltage maintenance power supply setting is that nominal voltage is constant in this stage, and electric current is along with the carrying out of charging progressively reduces.
The phase III of charging is the constant voltage trickle charge stage, charging voltage sustaining voltage calibration value is constant in this stage, but because battery charge is full of substantially, the electromotive force of battery equates with the supply voltage calibration value is approaching, charging current is reduced to lower degree, is the trickle charge state.
When not having the direct voltage source input, charging stops battery charge with adjustable constant voltage constant current power, and output uses battery to export a constant voltage dc source as power supply input with adjustable constant voltage constant current power, realizes the uninterrupted power supply to load.
Claims (8)
1. an adjustable constant voltage constant current power is by the Control of Voltage link, Current Control link and resistance R 1, diode D1 forms, the Control of Voltage link has an earth terminal vg10, a power end vp11, two signal end vs12 and vs13, the Current Control link has a power input cp21, a signal end cs22, a power output end cp23, the earth terminal vg10 ground connection that it is characterized in that the Control of Voltage link, the power end vp11 of Control of Voltage link is connected the DC input voitage source simultaneously with the power input cp21 of Current Control link, the signal end vs12 of Control of Voltage link connects power supply output by resistance R 1, the signal end vs13 of Control of Voltage link is connected with the signal end cs22 of Current Control link, and the power output end cp23 of Current Control link connects power supply output; Diode D1 is connected across between power supply output and the ground connection, and promptly the positive ending grounding of D1, negative terminal connect power supply output.
2. by the described adjustable constant voltage constant current power of claim 1, it is characterized in that described Control of Voltage link is demarcated the unit by voltage and 1 two parts of operational amplifier A are formed, voltage is demarcated the unit an earth terminal bg110, power end bp111, a signal end bs112.
3. by the described adjustable constant voltage constant current power of claim 2, it is characterized in that described voltage demarcates the earth terminal bg110 of unit and meet earth terminal vg10 into the Control of Voltage link, the power end bp111 of voltage demarcation unit meets the power end vp11 into the Control of Voltage link, the signal end bs112 that voltage is demarcated the unit is connected with the negative input end of amplifier A1, the positive input termination of amplifier A1 is the signal end vs12 of Control of Voltage link, and the output termination of amplifier A1 is the signal end vs13 of Control of Voltage link.
4. by the described adjustable constant voltage constant current power of claim 2, voltage is wherein demarcated the unit by resistance R 110, capacitor C 111, stabilivolt D111, variable resistor R111 forms, an end that it is characterized in that described resistance R 110 is connected with the negative terminal of stabilivolt D111, be that R110 connects with D111, another termination of resistance R 110 is the power end bp111 that voltage is demarcated the unit, the positive termination of stabilivolt D111 is the earth terminal bg110 that voltage is demarcated the unit, capacitor C 111 is in parallel with stabilivolt D111, the stiff end of variable resistor R111 is connected across the two ends of stabilivolt D111, and the adjustable termination of variable resistor R111 is the signal end bs112 that voltage is demarcated the unit.
5. by the described adjustable constant voltage constant current power of claim 1, it is characterized in that described Current Control link is made up of two parts in calibration with current signal unit, power drive unit, there are a power end dp211, two signal end ds210 and ds212 in the calibration with current signal unit, and power drive unit has a power input end qp221, signal end qs222, a power take-off qp223.
6. by the described adjustable constant voltage constant current power of claim 5, the signal end ds210 that it is characterized in that described calibration with current signal unit meets the signal end cs22 into the Current Control link, the power end dp211 of calibration with current signal unit is connected with the power input end qp221 of power drive unit and meets power input cp21 into the Current Control link, the signal end ds212 of calibration with current signal unit is connected with the signal end qs222 of power drive unit, and the power take-off qp223 of power drive unit connects and is current regulator economize on electricity source output terminal cp23.
7. by the described adjustable constant voltage constant current power of claim 6, calibration with current signal unit wherein is by resistance R 210, stabilivolt D211, variable resistor R211 forms, an end that it is characterized in that described resistance R 210 is connected with the anode of stabilivolt D211, be that R210 connects with D211, another termination of resistance R 210 is the signal end ds210 of calibration with current signal unit, the negative terminal of stabilivolt D211 meets the power end dp211 into the calibration with current signal unit, the stiff end of variable resistor R211 is connected across the two ends of stabilivolt D211, and the adjustable termination of variable resistor R211 is the signal end ds212 of calibration with current signal unit.
8. by the described adjustable constant voltage constant current power of claim 6, power drive unit wherein is by operational amplifier A 2, high power valve Tp and stabilivolt D221, resistance R 221, R222, R223 forms, the positive input termination that it is characterized in that described amplifier A2 is the signal end qs222 of power drive unit, the negative input end of amplifier A2 is connected by the emitter of resistance R 221 with high power valve Tp, the output terminal of amplifier A2 is connected by the grid of resistance R 222 with high power valve Tp, stabilivolt D221 is connected across between the grid and emitter of high power valve Tp, the emitter of high power valve Tp meets power input end qp221 into power drive unit by resistance R 223, and the collector of high power valve Tp meets the power take-off qp223 into power drive unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200545450U CN201203812Y (en) | 2008-01-08 | 2008-01-08 | Adjustable constant-voltage constant-current power supply |
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| CNU2008200545450U CN201203812Y (en) | 2008-01-08 | 2008-01-08 | Adjustable constant-voltage constant-current power supply |
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| CN102999073A (en) * | 2011-09-08 | 2013-03-27 | 洛阳嘉盛电源科技有限公司 | Constant-voltage and constant-current control circuit applied to power supply technology |
| CN103167681A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | High-accuracy segmentation adjustable power supply |
| CN101909377B (en) * | 2009-06-08 | 2013-07-10 | 海洋王照明科技股份有限公司 | Warning light circuit |
| CN103777670A (en) * | 2014-01-23 | 2014-05-07 | 苏州市职业大学 | Direct-current power supply with constant voltage or constant current output |
| CN105511389A (en) * | 2015-12-02 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | Lower programming control loop for improving programmable DC power supply output response speed |
| CN107453611A (en) * | 2017-08-14 | 2017-12-08 | 浙江大学 | Dc source noise modulate circuit based on constant-current source |
| CN109445506A (en) * | 2018-12-26 | 2019-03-08 | 长春工程学院 | A kind of Portable voltage following-up type constant current source module |
| CN110737299A (en) * | 2019-10-10 | 2020-01-31 | 华东光电集成器件研究所 | low-voltage variable constant current source device |
| CN111404250A (en) * | 2020-06-02 | 2020-07-10 | 江苏高博锐电气有限公司 | Charging equipment with accurate metering |
| CN111770613A (en) * | 2020-06-06 | 2020-10-13 | 深圳市零奔洋光电股份有限公司 | Adaptive control circuit and method for LED lamp strip |
| CN114938136A (en) * | 2022-07-19 | 2022-08-23 | 伏达半导体(合肥)有限公司 | Power adjusting device, double-battery charging device and charging current adjusting method |
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| CN101909377B (en) * | 2009-06-08 | 2013-07-10 | 海洋王照明科技股份有限公司 | Warning light circuit |
| CN102999073B (en) * | 2011-09-08 | 2015-04-22 | 洛阳嘉盛电源科技有限公司 | Constant-voltage and constant-current control circuit applied to power supply technology |
| CN102999073A (en) * | 2011-09-08 | 2013-03-27 | 洛阳嘉盛电源科技有限公司 | Constant-voltage and constant-current control circuit applied to power supply technology |
| CN103167681A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | High-accuracy segmentation adjustable power supply |
| CN103167681B (en) * | 2011-12-19 | 2015-12-16 | 上海航空电器有限公司 | A kind of high accuracy stepwise adjustable power supply |
| CN103777670A (en) * | 2014-01-23 | 2014-05-07 | 苏州市职业大学 | Direct-current power supply with constant voltage or constant current output |
| CN103777670B (en) * | 2014-01-23 | 2015-09-09 | 苏州市职业大学 | Can the direct supply of constant voltage or constant current output |
| CN105511389B (en) * | 2015-12-02 | 2018-06-26 | 中国电子科技集团公司第四十一研究所 | A kind of lower programming Control loop for promoting programme-controlled dc power output response speed |
| CN105511389A (en) * | 2015-12-02 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | Lower programming control loop for improving programmable DC power supply output response speed |
| CN107453611A (en) * | 2017-08-14 | 2017-12-08 | 浙江大学 | Dc source noise modulate circuit based on constant-current source |
| CN107453611B (en) * | 2017-08-14 | 2023-09-15 | 浙江大学 | DC power supply noise conditioning circuit based on constant current source |
| CN109445506A (en) * | 2018-12-26 | 2019-03-08 | 长春工程学院 | A kind of Portable voltage following-up type constant current source module |
| CN109445506B (en) * | 2018-12-26 | 2023-09-01 | 长春工程学院 | Portable voltage tracking type constant current source module |
| CN110737299A (en) * | 2019-10-10 | 2020-01-31 | 华东光电集成器件研究所 | low-voltage variable constant current source device |
| CN111404250A (en) * | 2020-06-02 | 2020-07-10 | 江苏高博锐电气有限公司 | Charging equipment with accurate metering |
| CN111770613A (en) * | 2020-06-06 | 2020-10-13 | 深圳市零奔洋光电股份有限公司 | Adaptive control circuit and method for LED lamp strip |
| CN111770613B (en) * | 2020-06-06 | 2021-02-23 | 深圳市零奔洋光电股份有限公司 | Adaptive control circuit and method for LED lamp strip |
| CN114938136A (en) * | 2022-07-19 | 2022-08-23 | 伏达半导体(合肥)有限公司 | Power adjusting device, double-battery charging device and charging current adjusting method |
| US11695294B1 (en) | 2022-07-19 | 2023-07-04 | Nuvolta Technologies (Hefei) Co., Ltd. | Power regulation apparatus, dual-battery charging apparatus and charging current regulation method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20100208 |