CN218888412U - Voltage and current adjustable circuit and power supply - Google Patents
Voltage and current adjustable circuit and power supply Download PDFInfo
- Publication number
- CN218888412U CN218888412U CN202121999770.3U CN202121999770U CN218888412U CN 218888412 U CN218888412 U CN 218888412U CN 202121999770 U CN202121999770 U CN 202121999770U CN 218888412 U CN218888412 U CN 218888412U
- Authority
- CN
- China
- Prior art keywords
- circuit
- adjustable
- operational amplifier
- grounded
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model relates to the technical field of power supplies, in particular to a voltage and current adjustable circuit and a power supply, which comprises resistors R1 and R2, potentiometers RP1, RP2 and RP3, capacitors C1 and C2, operational amplifiers U805, U709 and U601; the output ends of the operational amplifiers U805, U709 and U601 are respectively connected with the control circuit of the power supply module; the positive phase input end of the operational amplifier U805 is respectively connected to one end of a capacitor C1 and one end of a resistor R1, the other end of the capacitor C1 is grounded, the other end of the resistor R1 is respectively connected to one end and an adjustable end of a potentiometer RP1, the other end of the potentiometer RP1 is grounded, and the negative phase input end of the operational amplifier U805 is grounded; the positive phase input end of the operational amplifier U709 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end and the adjustable end of the potentiometer RP2 respectively, the other end of the potentiometer RP2 is grounded, and the reverse phase input end of the operational amplifier U709 is grounded. The utility model discloses a voltage electric current adjustable circuit inserts the inside control circuit of power after, can realize that the resistance through adjusting the potentiometre realizes that direct current output voltage is adjustable, direct current output current is adjustable.
Description
Technical Field
The utility model relates to a power technical field, concretely relates to adjustable circuit of voltage electric current and power.
Background
With the rapid development of electronic technology, the requirements of various electronic devices on power supply voltage and current are different, and the conventional power supply design is a single fixed output voltage and current system, so that various power supplies are produced on the market, and how to modify a power supply to realize continuous adjustment of output voltage and current is a problem to be solved urgently.
Disclosure of Invention
To the technical problem, the utility model provides a voltage electric current adjustable circuit inserts behind the inside control circuit of power, can realize that the resistance through adjusting the potentiometre realizes that direct current output voltage is adjustable, direct current output current is adjustable.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a voltage and current adjustable circuit comprises resistors R1 and R2, potentiometers RP1, RP2 and RP3, capacitors C1 and C2, operational amplifiers U805, U709 and U601;
the output ends of the operational amplifiers U805, U709 and U601 are respectively connected with the control circuit of the power supply module;
the positive phase input end of the operational amplifier U805 is respectively connected to one end of a capacitor C1 and one end of a resistor R1, the other end of the capacitor C1 is grounded, the other end of the resistor R1 is respectively connected to one end and an adjustable end of a potentiometer RP1, the other end of the potentiometer RP1 is grounded, and the negative phase input end of the operational amplifier U805 is grounded;
the positive phase input end of the operational amplifier U709 is connected to one end of a resistor R2, the other end of the resistor R2 is respectively connected to one end and an adjustable end of a potentiometer RP2, the other end of the potentiometer RP2 is grounded, and the reverse phase input end of the operational amplifier U709 is grounded;
the positive phase input end of the operational amplifier U601 is connected to one end of the capacitor C2 and one end and the adjustable end of the potentiometer RP3 respectively, the other end of the capacitor C1 and the other end of the potentiometer RP3 are grounded, and the inverting input end of the operational amplifier U601 is grounded.
Further, the operational amplifiers U805, U709 and U601 are all mc33172 in model.
Another aspect of the present invention provides a power supply, including the above voltage current adjustable circuit.
Furthermore, the power supply also comprises an alternating current input circuit, a rectifying circuit, a PFC circuit, a DC/DC conversion circuit, a direct current output circuit and a control circuit; the alternating current input circuit is connected with the rectifying circuit, the rectifying circuit is connected with the PFC circuit, the voltage and current adjustable circuit is connected with the control circuit, the PFC circuit and the control circuit are respectively connected with the DC/DC conversion circuit, and the DC/DC conversion circuit is connected with the direct current output circuit.
Further, the control circuit includes a digital signal processor.
Further, the model of the digital signal processor is TMS320F28016.
Further, the output terminal of the operational amplifier U805 is connected to pin 80 of the digital signal processor, the output terminal of the operational amplifier U709 is connected to pin 84 of the digital signal processor, and the output terminal of the operational amplifier U601 is connected to pin 91 of the digital signal processor.
The utility model discloses a voltage electric current adjustable circuit inserts behind the inside control circuit of power, can realize that the resistance through adjusting the potentiometre realizes that direct current output voltage is adjustable, direct current output current is adjustable:
(1) the direct current output voltage is continuously adjustable from 0V to 60V.
(2) The direct current output current is continuously adjustable from 0 to 50A.
Drawings
Fig. 1 is a schematic structural diagram of the voltage-current adjustable circuit of the present invention;
fig. 2 is a schematic structural diagram of the power supply of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments (taking a capacitor with a spherical structure as an example). It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
With the rapid development of electronic technology, the requirements of various electronic devices on the supply voltage and current are different, and the conventional power supply designs are all of a single fixed output voltage and current system, so that various power supplies are produced in the market, and how to reform a power supply to realize continuous adjustment of output voltage and current has become a problem to be solved urgently.
Therefore, the utility model provides a voltage and current adjustable circuit, as shown in fig. 1, comprising resistors R1 and R2, potentiometers RP1, RP2 and RP3, capacitors C1 and C2, operational amplifiers U805, U709 and U601;
the output ends of the operational amplifiers U805, U709 and U601 are respectively connected with the control circuit of the power supply module;
the positive phase input end of the operational amplifier U805 is respectively connected to one end of a capacitor C1 and one end of a resistor R1, the other end of the capacitor C1 is grounded, the other end of the resistor R1 is respectively connected to one end and an adjustable end of a potentiometer RP1, the other end of the potentiometer RP1 is grounded, and the negative phase input end of the operational amplifier U805 is grounded;
the positive phase input end of the operational amplifier U709 is connected to one end of a resistor R2, the other end of the resistor R2 is respectively connected to one end and an adjustable end of a potentiometer RP2, the other end of the potentiometer RP2 is grounded, and the reverse phase input end of the operational amplifier U709 is grounded;
the positive phase input end of the operational amplifier U601 is connected to one end of the capacitor C2 and one end and an adjustable end of the potentiometer RP3 respectively, the other end of the capacitor C1 and the other end of the potentiometer RP3 are grounded, and the negative phase input end of the operational amplifier U601 is grounded.
In the circuit, the models of the operational amplifiers U805, U709 and U601 are mc33172.
Through inciting somebody to action the utility model provides an among the control circuit that voltage electric current adjustable circuit inserted power module, adjust the resistance of potentiometre, can realize that power module's output current and output voltage are adjustable.
The specific adjustment is as follows:
1. adjusting the resistance value of a reference voltage potentiometer RP3 to be maximum, and limiting the maximum output voltage of the module to be 60V;
2. adjusting the resistance value of the potentiometer RP1 to ensure that the output voltage of the power supply module continuously changes between 0 and 60V;
3, adjusting the resistance value of the potentiometer RP2 to ensure that the output current of the power supply module continuously changes between 0 and 50A;
4. in the adjusting process, the power supply module works stably under the combination of different output voltages and output currents;
through continuous adjustment, the range of the output voltage and the output current can meet the design requirement, and the stability also meets the design requirement.
The voltage and current adjustable circuit adjusts the resistance value change of RP1 through a voltage potentiometer and inputs the resistance value change into an operational amplifier, and the change of an output signal of the operational amplifier is input into a digital signal processor to control a DC/DC conversion circuit to change power so as to realize the continuous change of the output voltage; the change of the resistance value is adjusted by a current potentiometer RP2 and then input into the operational amplifier, and the change of an output signal of the operational amplifier is input into a digital signal processor of a power supply module to control a DC/DC conversion circuit to change the power so as to realize the continuous change of the output current; the resistance value is adjusted through the reference potentiometer RP3 to be changed and then input into the operational amplifier, and the change of the output signal of the operational amplifier is input into the digital signal processor of the power module to change the maximum output voltage of the control signal adjusting output end of the control circuit.
The utility model discloses a voltage electric current adjustable circuit inserts behind the inside control circuit of power, can realize that the resistance through adjusting the potentiometre realizes that direct current output voltage is adjustable, direct current output current is adjustable:
(1) the direct current output voltage is continuously adjustable from 0V to 60V.
(2) The direct current output current is continuously adjustable from 0 to 50A.
In another embodiment of the present invention, a power supply is provided, which includes the voltage-current adjustable circuit described above. As shown in fig. 2, the power supply further includes an ac input circuit, a rectifying circuit, a PFC circuit, a DC/DC conversion circuit, a DC output circuit, and a control circuit; the alternating current input circuit is connected with the rectifying circuit, the rectifying circuit is connected with the PFC circuit, the voltage and current adjustable circuit is connected with the control circuit, the PFC circuit and the control circuit are respectively connected with the DC/DC conversion circuit, and the DC/DC conversion circuit is connected with the direct current output circuit.
Further, the control circuit includes a digital signal processor, preferably of the type TMS320F28016. As shown in fig. 1, the output terminal of the op-amp U805 is connected to pin 80 of the digital signal processor, the output terminal of the op-amp U709 is connected to pin 84 of the digital signal processor, and the output terminal of the op-amp U601 is connected to pin 91 of the digital signal processor.
The voltage and current adjustable circuit of the power supply of the embodiment is externally arranged, as shown in fig. 2. The front end of the alternating current input circuit is connected with a power supply module, alternating current signals generated by the alternating current input circuit are input into a rectification circuit to be rectified and filtered, direct current voltage signals obtained by rectification of the rectification circuit are input into a PFC circuit to be subjected to power factor conversion, converted direct current voltage signals are input into a DC/DC conversion circuit to be subjected to signal conversion, the DC/DC conversion circuit is subjected to duty ratio control on the switching frequency of a switching tube by a control circuit to obtain corresponding pulse voltage, then the voltage is transformed by a transformer, and finally, corresponding voltage current is output by a direct current output circuit.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (7)
1. A voltage current adjustable circuit is characterized in that: the circuit comprises resistors R1 and R2, potentiometers RP1, RP2 and RP3, capacitors C1 and C2, operational amplifiers U805, U709 and U601;
the output ends of the operational amplifiers U805, U709 and U601 are respectively connected with the control circuit of the power supply module;
the positive phase input end of the operational amplifier U805 is respectively connected to one end of a capacitor C1 and one end of a resistor R1, the other end of the capacitor C1 is grounded, the other end of the resistor R1 is respectively connected to one end and an adjustable end of a potentiometer RP1, the other end of the potentiometer RP1 is grounded, and the negative phase input end of the operational amplifier U805 is grounded;
the positive phase input end of the operational amplifier U709 is connected to one end of a resistor R2, the other end of the resistor R2 is respectively connected to one end and an adjustable end of a potentiometer RP2, the other end of the potentiometer RP2 is grounded, and the inverting input end of the operational amplifier U709 is grounded;
the positive phase input end of the operational amplifier U601 is connected to one end of the capacitor C2 and one end and an adjustable end of the potentiometer RP3 respectively, the other end of the capacitor C1 and the other end of the potentiometer RP3 are grounded, and the negative phase input end of the operational amplifier U601 is grounded.
2. The voltage-to-current tunable circuit of claim 1, wherein: the models of the operational amplifiers U805, U709 and U601 are mc33172.
3. A power supply, characterized by: comprising a voltage current adjustable circuit according to any of claims 1-2.
4. The power supply of claim 3, wherein: the power supply also comprises an alternating current input circuit, a rectifying circuit, a PFC circuit, a DC/DC conversion circuit, a direct current output circuit and a control circuit; the alternating current input circuit is connected with the rectifying circuit, the rectifying circuit is connected with the PFC circuit, the voltage and current adjustable circuit is connected with the control circuit, the PFC circuit and the control circuit are respectively connected with the DC/DC conversion circuit, and the DC/DC conversion circuit is connected with the direct current output circuit.
5. The power supply of claim 4, wherein: the control circuit includes a digital signal processor.
6. The power supply of claim 5, wherein: the model of the digital signal processor is TMS320F28016.
7. The power supply of claim 6, wherein: the output end of the operational amplifier U805 is connected to a pin 80 of the digital signal processor, the output end of the operational amplifier U709 is connected to a pin 84 of the digital signal processor, and the output end of the operational amplifier U601 is connected to a pin 91 of the digital signal processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121999770.3U CN218888412U (en) | 2021-08-24 | 2021-08-24 | Voltage and current adjustable circuit and power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121999770.3U CN218888412U (en) | 2021-08-24 | 2021-08-24 | Voltage and current adjustable circuit and power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218888412U true CN218888412U (en) | 2023-04-18 |
Family
ID=85942156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121999770.3U Active CN218888412U (en) | 2021-08-24 | 2021-08-24 | Voltage and current adjustable circuit and power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218888412U (en) |
-
2021
- 2021-08-24 CN CN202121999770.3U patent/CN218888412U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5430364A (en) | Current harmonic, current form factor and power factor modification unit for rectifier supplied loads | |
| CN218888412U (en) | Voltage and current adjustable circuit and power supply | |
| CN212183769U (en) | LED power supply current linear steady-state increasing circuit | |
| CN217469769U (en) | Programmable boost DCDC circuit | |
| CN111277134A (en) | Voltage conversion circuit and display device | |
| CN113271004A (en) | Adjustable boost power supply of high accuracy software | |
| CN206149156U (en) | But electric vehicle charger change over switch control source | |
| CN101132147A (en) | DC-DC switch power source and its output voltage regulation method | |
| CN110212743B (en) | Control system for reducing ripple current of capacitor of CRM-Buck-PFC converter | |
| CN210119719U (en) | Direct current source | |
| CN215268079U (en) | Switching power supply parallel power supply system | |
| CN107257195B (en) | Resonant converter | |
| CN106712516B (en) | Two-stage voltage stabilizing and regulating circuit, voltage stabilizing method and design method thereof | |
| CN211377899U (en) | PD power supply circuit and PD power supply unit based on PPS standard | |
| CN213522470U (en) | High-power-factor and stroboflash-free LED driving circuit and device | |
| CN209730437U (en) | A kind of low-power laser and its driving circuit | |
| CN208971374U (en) | Electric power management circuit | |
| CN203933392U (en) | A kind of D.C. regulated power supply | |
| CN208299693U (en) | A kind of Switching Power Supply of full bridge structure | |
| CN220527708U (en) | Wide power supply X-ray machine capacitor energy storage circuit and equipment | |
| CN111313678A (en) | Power factor correction circuit | |
| CN217215960U (en) | Lightning protection multifunctional constant-voltage constant-current control circuit | |
| CN220043238U (en) | 0-1 kV adjustable precision DC-DC converter | |
| CN219760867U (en) | 0-500V adjustable precision DC-DC converter | |
| CN211377893U (en) | Power factor correction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |