CN102185476B - DC (direct-current) power supply with temperature-controlled output - Google Patents
DC (direct-current) power supply with temperature-controlled output Download PDFInfo
- Publication number
- CN102185476B CN102185476B CN201110114978.7A CN201110114978A CN102185476B CN 102185476 B CN102185476 B CN 102185476B CN 201110114978 A CN201110114978 A CN 201110114978A CN 102185476 B CN102185476 B CN 102185476B
- Authority
- CN
- China
- Prior art keywords
- resistance
- output
- temperature
- signal ground
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a DC (direct-current) power supply with temperature-controlled output, which is characterized in that a PWM (pulse-width modulation) controller of an AC (alternating-current)-DC converter is connected with a feedback loop; and generated error signals are fed back to the PWM controller of the AC-DC converter by an photo-coupler for adjustment, thus the DC output voltage is the maximal voltage constantly when the temperature is more than the set highest temperature, the DC output voltage is the minimal voltage constantly when the temperature is lower than the set lowest temperature, the DC output voltage is reduced with the reduction of the temperature when the temperature is between the set highest temperature and the set lowest temperature. The DC power supply is used for a semiconductor refrigerating device and is more stable and finer in temperature control.
Description
Technical field
The invention belongs to field of power supplies, especially a kind of output is subject to temperature controlled DC power supply.
Background technology
At the device of semiconductor refrigerating, for making refrigerating efficiency the highest, require to the control of temperature more steadily and meticulous, the output tackling the DC power supply of its power supply mutually has characteristic as shown in Figure 1: when temperature is higher than certain set point T
htime, need power supply with maximum voltage V
h(or electric current I
h) power supply, namely freeze with maximum power; When temperature reaches the minimum T of setting
1time, power supply is with minimum voltage V
1(or electric current I
1) power supply, with equalized temperature in holdout device; When temperature is positioned at T
h~ T
1between time, output voltage (or electric current) with temperature reduce and reduce.
Summary of the invention
The object of this invention is to provide a kind of output by temperature controlled DC power supply, can above-mentioned requirements be met.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of output is subject to temperature controlled DC power supply, comprise AC-DC converter, the PWM controller of described AC-DC converter is connected to feedback control loop, it consists of: one end of resistance R5 is connected with signal ground, one end of the other end and resistance R4, one end of R2* is connected, the other end of R4 is connected with 2.5V reference voltage, the other end of R2* is connected with the positive input terminal of operational amplifier OP1, be connected with one end of resistance R1* simultaneously, the other end of R1* is connected with one end of thermally sensitive temperature transducer RT1 and is connected with one end of resistance R3 simultaneously, the other end of resistance R3 is connected with signal ground, the other end of RT1 is connected with 2.5V reference voltage, the negative input end of OP1 is connected with one end of resistance R1, one end of R2, the positive input terminal of the other end of R1 and one end of resistance R7, one end of R6 and operational amplifier OP4 is connected, the other end of R7 is connected with signal ground, the other end of R6 is connected with 2.5V reference voltage, the other end of R2 is connected with the negative input end of operational amplifier OP4 with one end of the output of OP1, resistance R8, the other end of R8 is connected with one end of the negative input end of operational amplifier OP2 and electric capacity C2, the positive input terminal of OP2 is connected with one end of resistance R9, the other end of R9 and one end of resistance R10 and export sampled point VH and be connected, the other end of C2 is connected with one end of the output of OP2 and R14, the other end of R14 is connected with the positive pole of diode D2, also be connected with the drain electrode of Q1 simultaneously, the source electrode of Q1 is connected with signal ground, the grid of Q1 is connected with the output of OP4 and Q2 grid, and the source electrode of Q2 is connected with one end of R13 and signal ground, the drain electrode of Q2 is connected with the other end of resistance R13 and one end of R12, the other end of R12 is connected with one end of one end of electric capacity C1, resistance R11 and the negative input end of operational amplifier OP3, the other end of R11 is connected with 2.5V reference voltage, the other end of C1 is connected with the positive pole of diode D1 and the output of OP3, the negative pole of D1 is connected with one end of the negative pole of D2 and resistance R15, the other end of R15 is connected with the positive pole of the transmitting terminal of optical coupler U1, and the negative pole of the transmitting terminal of optical coupler U1 connects with signal ground, the receiving terminal of optical coupler U1 feeds back in the PWM controller of AC-DC converter, described output sampled point VH is connected to resistance one end of reflection output voltage or output current change.
Select as one, described output sampled point VH is connected with one end of resistance R16, one end of R17, and the other end of R17 is connected with signal ground, and the other end of R16 is connected with power output end positive pole.
Alternatively, described output sampled point VH is connected to the one end of the resistance R18 being serially connected with power output end negative pole, and the other end of R18 connects with signal ground.
DC power supply of the present invention, by being connected to feedback control loop in the PWM controller of described AC-DC converter, the PWM controller utilizing the error signal produced to be fed back to AC-DC converter by optical coupler regulates, make VD constant on maximum voltage when temperature is greater than the maximum temperature of setting, when temperature is lower than constant in minimum value during the minimum temperature set, time between the two, output voltage reduces with temperature and reduces, for semiconductor cooling device, the control of temperature can be made more steadily with meticulous.
Accompanying drawing explanation
According to embodiment and accompanying drawing, the present invention is described in further detail below.
Fig. 1 is the output characteristics figure of DC power supply;
Fig. 2 is that output voltage described in the present embodiment is by temperature controlled DC power supply circuit schematic diagram;
Fig. 3 is that output current described in the present embodiment is by temperature controlled DC power supply circuit schematic diagram; .
Embodiment
As shown in Figure 2, give an output voltage by temperature controlled DC power supply circuit schematic diagram, the PWM controller of described AC-DC converter is connected to feedback control loop, it consists of: one end of resistance R5 is connected with signal ground, one end of the other end and resistance R4, one end of R2* is connected, the other end of R4 is connected with 2.5V reference voltage, the other end of R2* is connected with the positive input terminal of operational amplifier OP1, be connected with one end of resistance R1* simultaneously, the other end of R1* is connected with one end of thermally sensitive temperature transducer RT1 and is connected with one end of resistance R3 simultaneously, the other end of resistance R3 is connected with signal ground, the other end of RT1 is connected with 2.5V reference voltage, the negative input end of OP1 is connected with one end of resistance R1, one end of R2, the positive input terminal of the other end of R1 and one end of resistance R7, one end of R6 and operational amplifier OP4 is connected, the other end of R7 is connected with signal ground, the other end of R6 is connected with 2.5V reference voltage, the other end of R2 is connected with the negative input end of operational amplifier OP4 with one end of the output of OP1, resistance R8, the other end of R8 is connected with one end of the negative input end of operational amplifier OP2 and electric capacity C2, the positive input terminal of OP2 is connected with one end of resistance R9, the other end of R9 and one end of resistance R10 and export sampled point VH and be connected, the other end of C2 is connected with one end of the output of OP2 and R14, the other end of R14 is connected with the positive pole of diode D2, also be connected with the drain electrode of Q1 simultaneously, the source electrode of Q1 is connected with signal ground, the grid of Q1 is connected with the output of OP4 and Q2 grid, and the source electrode of Q2 is connected with one end of R13 and signal ground, the drain electrode of Q2 is connected with the other end of resistance R13 and one end of R12, the other end of R12 is connected with one end of one end of electric capacity C1, resistance R11 and the negative input end of operational amplifier OP3, the other end of R11 is connected with 2.5V reference voltage, the other end of C1 is connected with the positive pole of diode D1 and the output of OP3, the negative pole of D1 is connected with one end of the negative pole of D2 and resistance R15, the other end of R15 is connected with the positive pole of the transmitting terminal of optical coupler U1, and the negative pole of the transmitting terminal of optical coupler U1 connects with signal ground, the receiving terminal of optical coupler U1 feeds back in the PWM controller of AC-DC converter, described output sampled point VH is connected with one end of resistance R16, one end of R17, and the other end of R17 is connected with signal ground, and the other end of R16 is connected with power output end positive pole.
As shown in Figure 3, give an output current by temperature controlled DC power supply circuit schematic diagram, the PWM controller of described AC-DC converter is connected to feedback control loop, it consists of: one end of resistance R5 is connected with signal ground, one end of the other end and resistance R4, one end of R2* is connected, the other end of R4 is connected with 2.5V reference voltage, the other end of R2* is connected with the positive input terminal of operational amplifier OP1, be connected with one end of resistance R1* simultaneously, the other end of R1* is connected with one end of thermally sensitive temperature transducer RT1 and is connected with one end of resistance R3 simultaneously, the other end of resistance R3 is connected with signal ground, the other end of RT1 is connected with 2.5V reference voltage, the negative input end of OP1 is connected with one end of resistance R1, one end of R2, the positive input terminal of the other end of R1 and one end of resistance R7, one end of R6 and operational amplifier OP4 is connected, the other end of R7 is connected with signal ground, the other end of R6 is connected with 2.5V reference voltage, the other end of R2 is connected with the negative input end of operational amplifier OP4 with one end of the output of OP1, resistance R8, the other end of R8 is connected with one end of the negative input end of operational amplifier OP2 and electric capacity C2, the positive input terminal of OP2 is connected with one end of resistance R9, the other end of R9 and one end of resistance R10 and export sampled point VH and be connected, the other end of C2 is connected with one end of the output of OP2 and R14, the other end of R14 is connected with the positive pole of diode D2, also be connected with the drain electrode of Q1 simultaneously, the source electrode of Q1 is connected with signal ground, the grid of Q1 is connected with the output of OP4 and Q2 grid, and the source electrode of Q2 is connected with one end of R13 and signal ground, the drain electrode of Q2 is connected with the other end of resistance R13 and one end of R12, the other end of R12 is connected with one end of one end of electric capacity C1, resistance R11 and the negative input end of operational amplifier OP3, the other end of R11 is connected with 2.5V reference voltage, the other end of C1 is connected with the positive pole of diode D1 and the output of OP3, the negative pole of D1 is connected with one end of the negative pole of D2 and resistance R15, the other end of R15 is connected with the positive pole of the transmitting terminal of optical coupler U1, and the negative pole of the transmitting terminal of optical coupler U1 connects with signal ground, the receiving terminal of optical coupler U1 feeds back in the PWM controller of AC-DC converter, described output sampled point VH is connected to the one end of the resistance R18 being serially connected with power output end negative pole, and the other end of R18 connects with signal ground.
Its input of operational amplifier OP1 VIN is the voltage signal that temperature sensor converts to, VL is the magnitude of voltage that VD minimum obtains through resitstance voltage divider, bias voltage VB=VL (R1/R2), having transfer function is VR=(VIN-VL+VB) (R2/R1);
The VR signal produced is added to the negative input end of the error amplifier be made up of operational amplifier OP2, and the dividing potential drop sampled value VH of VD or electric current is added to the positive input terminal of this error amplifier, it is exported and is fed back in the PWM controller of AC-DC conversion by optical coupler U1, makes output dc voltage be ramp voltage along with variations in temperature.
An Isobarically Control error amplifier be made up of operational amplifier OP3, its feature is the negative input end that reference voltage is added in it, and VH is added in its positive input terminal, when maximum VD constant control, Q1 and Q2 not conductings, the reference voltage of negative input end is that the series value dividing potential drop of R11 and R12 and R13 obtains.
Voltage comparator be made up of operational amplifier OP4 is for detecting signal VL when VD reaches minimum value, when lower than VL, OP4 exports and makes Q1, Q2 conducting, the negative terminal reference voltage value of OP3 error amplifier is VL, system is by constant voltage in minimum output voltage (or electric current) value, and VL is obtained by R11 and R12 dividing potential drop.
Claims (3)
1. one kind exports by temperature controlled DC power supply, comprise AC-DC converter, it is characterized in that, the PWM controller of described AC-DC converter is connected to feedback control loop, it consists of: one end of resistance R5 is connected with signal ground, one end of the other end and resistance R4, one end of R2* is connected, the other end of R4 is connected with 2.5V reference voltage, the other end of R2* is connected with the positive input terminal of operational amplifier OP1, be connected with one end of resistance R1* simultaneously, the other end of R1* is connected with one end of thermally sensitive temperature transducer RT1 and is connected with one end of resistance R3 simultaneously, the other end of resistance R3 is connected with signal ground, the other end of RT1 is connected with 2.5V reference voltage, the negative input end of OP1 is connected with one end of resistance R1, one end of R2, the positive input terminal of the other end of R1 and one end of resistance R7, one end of R6 and operational amplifier OP4 is connected, the other end of R7 is connected with signal ground, the other end of R6 is connected with 2.5V reference voltage, the other end of R2 is connected with the negative input end of operational amplifier OP4 with one end of the output of OP1, resistance R8, the other end of R8 is connected with one end of the negative input end of operational amplifier OP2 and electric capacity C2, the positive input terminal of OP2 is connected with one end of resistance R9, the other end of R9 and one end of resistance R10 and export sampled point VH and be connected, the other end of C2 is connected with one end of the output of OP2 and R14, the other end of R14 is connected with the positive pole of diode D2, also be connected with the drain electrode of Q1 simultaneously, the source electrode of Q1 is connected with signal ground, the grid of Q1 is connected with the output of OP4 and Q2 grid, and the source electrode of Q2 is connected with one end of R13 and signal ground, the drain electrode of Q2 is connected with the other end of resistance R13 and one end of R12, the other end of R12 is connected with one end of one end of electric capacity C1, resistance R11 and the negative input end of operational amplifier OP3, the other end of R11 is connected with 2.5V reference voltage, the other end of C1 is connected with the positive pole of diode D1 and the output of OP3, the negative pole of D1 is connected with one end of the negative pole of D2 and resistance R15, the other end of R15 is connected with the positive pole of the transmitting terminal of optical coupler U1, and the negative pole of the transmitting terminal of optical coupler U1 connects with signal ground, the receiving terminal of optical coupler U1 feeds back in the PWM controller of AC-DC converter, described output sampled point VH is connected to resistance one end of reflection output voltage or output current change.
2. DC power supply according to claim 1, is characterized in that, described output sampled point VH is connected with one end of resistance R16, one end of R17, and the other end of R17 is connected with signal ground, and the other end of R16 is connected with power output end positive pole.
3. DC power supply according to claim 1, is characterized in that, described output sampled point VH is connected to the one end of the resistance R18 being serially connected with power output end negative pole, and the other end of R18 connects with signal ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110114978.7A CN102185476B (en) | 2011-05-05 | 2011-05-05 | DC (direct-current) power supply with temperature-controlled output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110114978.7A CN102185476B (en) | 2011-05-05 | 2011-05-05 | DC (direct-current) power supply with temperature-controlled output |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102185476A CN102185476A (en) | 2011-09-14 |
| CN102185476B true CN102185476B (en) | 2015-05-27 |
Family
ID=44571566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110114978.7A Active CN102185476B (en) | 2011-05-05 | 2011-05-05 | DC (direct-current) power supply with temperature-controlled output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102185476B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574030Y (en) * | 2002-10-17 | 2003-09-17 | 北京安控科技发展有限公司 | Thermal couple signal conditioning circuit for automatic control terminal |
| CN101246363A (en) * | 2008-03-18 | 2008-08-20 | 杭州电子科技大学 | Temperature detection circuit for gas kitchen ranges automatic control |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7116181B2 (en) * | 2004-12-21 | 2006-10-03 | Actel Corporation | Voltage- and temperature-compensated RC oscillator circuit |
| US7463012B2 (en) * | 2006-11-20 | 2008-12-09 | Micrel, Incorporated | Bandgap reference circuits with isolated trim elements |
-
2011
- 2011-05-05 CN CN201110114978.7A patent/CN102185476B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574030Y (en) * | 2002-10-17 | 2003-09-17 | 北京安控科技发展有限公司 | Thermal couple signal conditioning circuit for automatic control terminal |
| CN101246363A (en) * | 2008-03-18 | 2008-08-20 | 杭州电子科技大学 | Temperature detection circuit for gas kitchen ranges automatic control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102185476A (en) | 2011-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101552560B (en) | Switch voltage stabilizing circuit and control method thereof | |
| JP6531097B2 (en) | Voltage converter compensation device and method | |
| JP3198222U (en) | Charger and charging system | |
| TWI500248B (en) | High efficiency bidirectional DC converter and its control method | |
| CN106257813A (en) | There is the switch converters transmitted from the signal of primary side to primary side | |
| EP2378649A3 (en) | Switching scheme for step up-step down converters using fixed frequency current-mode control | |
| TW201535947A (en) | Switching-mode power supplies | |
| TW200934045A (en) | High efficiency charging circuit and power supplying system | |
| CN105281568B (en) | Reduction voltage circuit | |
| CN107437831B (en) | Switching power converter for direct battery charging | |
| US20180041073A1 (en) | Power Converter with Output Voltage Control | |
| JP2013165637A (en) | Switch mode power supply module, and hiccup control method associated therewith | |
| CN105337497B (en) | Improve the system of DC voltage booster circuit transient response | |
| CN102742136B (en) | Buck dc-dc and ON-OFF control circuit | |
| TW200737648A (en) | Battery charging circuit | |
| CN203705525U (en) | Current detection circuit and control loop thereof | |
| CN102185476B (en) | DC (direct-current) power supply with temperature-controlled output | |
| US9559538B1 (en) | Switch mode battery charger with improved battery charging time | |
| US20220302732A1 (en) | Charging circuit and charging device | |
| CN202798460U (en) | Paralleled current sharing line for voltage converter | |
| CN201518451U (en) | IPM special driving power supply | |
| CN105914832B (en) | Adjustable voltage feedback circuit with constant current protection and working method | |
| CN103427643A (en) | Control circuit of buck-boost drive circuit and control method thereof | |
| CN208498260U (en) | A kind of wireless charging system of electronic automobile-used super capacitor | |
| CN2859550Y (en) | Voltage comparator earth wire electriferous detecting device with resistor that supplies detecting signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |