CN214707566U - Constant power control circuit of isolated power supply - Google Patents
Constant power control circuit of isolated power supply Download PDFInfo
- Publication number
- CN214707566U CN214707566U CN202120834885.0U CN202120834885U CN214707566U CN 214707566 U CN214707566 U CN 214707566U CN 202120834885 U CN202120834885 U CN 202120834885U CN 214707566 U CN214707566 U CN 214707566U
- Authority
- CN
- China
- Prior art keywords
- single chip
- chip microcomputer
- isolated
- power supply
- circuit
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a constant power control circuit of isolated power supply, including the transformer, the primary winding of this transformer connects the interchange source, and the secondary winding of this transformer connects load, its characterized in that: the non-isolated end of the isolated power supply is provided with a first single chip microcomputer, a second single chip microcomputer and an electric sampling circuit, and the isolated end of the isolated power supply is provided with a third single chip microcomputer; the sampling pin of the first single chip microcomputer is connected with an electric sampling circuit to obtain the electric signal change of an input side, and the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the second singlechip is used for controlling the output power of the non-isolated end of the isolation circuit and is connected with a power control circuit; the first single chip microcomputer and the third single chip microcomputer and the second single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals. The utility model discloses avoided the non-isolation end of lug connection to carry out the risk of sampling, the electrical isolation of guarantee circuit.
Description
Technical Field
The utility model relates to a constant power control circuit of isolated power source.
Background
In the isolation power supply, a non-isolation end (alternating current part) and an isolation end (direct current part) are isolated through a transformer. In order to respond to the input voltage change of the non-isolation end of the isolation power supply to adjust and control the output state, for example, the direct current output is cut off when the voltage of the non-isolation end is overhigh, and the single chip microcomputer of the direct current output part needs to acquire the electric signal change of the non-isolation end of the isolation power supply in real time. Because the working voltage difference between the alternating current input part and the direct current output part is large, if the single chip microcomputer is connected with a non-isolation end through a simple sampling circuit, high risk exists, and therefore isolation design is needed. Meanwhile, the single chip microcomputer at the isolation end needs to control the output power of the non-isolation end, and the isolation circuit also needs to be connected with the power control circuit at the non-isolation end to output a control signal.
SUMMERY OF THE UTILITY MODEL
Based on the background art, the utility model discloses a constant power control circuit of isolated power supply, it realizes through following technical means: the constant power control circuit of the isolation power supply comprises a transformer, a primary winding of the transformer is connected with an alternating current source, a secondary winding of the transformer is connected with a load, a first single chip microcomputer, a second single chip microcomputer and an electric sampling circuit are arranged at the non-isolation end of the isolation power supply, and a third single chip microcomputer is arranged at the isolation end of the isolation power supply; the sampling pin of the first single chip microcomputer is connected with an electric sampling circuit to obtain the electric signal change of an input side, and the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the second singlechip is used for controlling the output power of the non-isolated end of the isolation circuit and is connected with a power control circuit; the first single chip microcomputer and the third single chip microcomputer and the second single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals.
In one or more embodiments of the present invention, the electrical sampling circuit includes a diode D1, resistors R1 and R2, and a capacitor C1, the anode of the diode D1 is connected to the primary winding of the transformer, the cathode of the diode D1 is connected to the ground through resistors R1 and R2 in series, the connection point of the resistors R1 and R2 is used as the output terminal of the electrical sampling circuit and is connected to the sampling pin of the first single chip, and the capacitor C1 is connected to both ends of the resistor R2.
In one or more embodiments of the present invention, the isolation circuit includes a first optical coupler module and a second optical coupler module; the input end of the first optocoupler module is connected with a signal output pin of the first singlechip, and the output end of the first optocoupler module is connected with a signal input pin of the third singlechip; the input end of the second optocoupler module is connected with a signal output pin of the third single chip microcomputer, and the output end of the second optocoupler module is connected with a signal input pin of the second single chip mechanism.
In the middle of one or more embodiments of the utility model, first singlechip and second singlechip are realized by same singlechip chip.
In one or more embodiments of the present invention, the power control circuit includes a thyristor connected to an output line of the non-isolated terminal.
The utility model also discloses a constant power control circuit of the isolated power supply, which comprises a transformer, wherein the primary winding of the transformer is connected with an alternating current source, the secondary winding of the transformer is connected with a load, a first singlechip and an electric sampling circuit are arranged at the non-isolated end of the isolated power supply, and a third singlechip is arranged at the isolated end of the isolated power supply; the sampling pin of the first single chip microcomputer is connected with the electric sampling circuit to obtain the electric signal change of the input side, and the first single chip microcomputer is used for controlling the output power of the non-isolation end of the isolation circuit and is connected with the power control circuit; the third singlechip is used for sending power control parameters to the first singlechip; the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the first single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals.
The utility model has the advantages that: the first single chip microcomputer which is arranged at the non-isolation end of the isolation circuit is utilized for carrying out electric sampling, and the optical coupling module is used for isolating a transmission signal to the third single chip microcomputer at the isolation end, so that the risk that the second single chip microcomputer is directly connected with the non-isolation end for carrying out sampling is avoided, and the electric isolation degree of the circuit is guaranteed. And the first single chip microcomputer is used for isolating and transferring the sampling signal, so that the matching problem of the sampling voltage and the output signal is well solved, the circuit structure of the electric sampling circuit can be simplified, the output signal of the first single chip microcomputer can meet the input requirement of the optical coupling module, the complicated sampling circuit design is not needed, and the whole implementation cost is low. Meanwhile, the third singlechip is used for constant power processing control, and a control signal of the third singlechip is output to the second singlechip through the optocoupler module, so that electrical isolation is realized, and the safety is high.
Drawings
Fig. 1 is a schematic diagram of a circuit framework according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of an electrical sampling circuit according to a first embodiment of the present invention.
Fig. 3 is a schematic diagram of a circuit framework according to a second embodiment of the present invention.
Fig. 4 is a schematic diagram of a circuit framework according to a third embodiment of the present invention.
Detailed Description
The application is further described below with reference to the accompanying drawings:
example one
Referring to fig. 1, the constant power control circuit of the isolated power supply includes a transformer, a primary winding of the transformer is connected with an alternating current source, a secondary winding of the transformer is connected with a load, a first single chip microcomputer, a second single chip microcomputer and an electrical sampling circuit are arranged at a non-isolated end of the isolated power supply, and a third single chip microcomputer is arranged at an isolated end of the isolated power supply; the sampling pin of the first single chip microcomputer is connected with an electric sampling circuit to obtain the electric signal change of an input side, and the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the second singlechip is used for controlling the output power of the non-isolated end of the isolation circuit and is connected with a power control circuit; the first single chip microcomputer and the third single chip microcomputer and the second single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals.
Specifically, referring to fig. 2, the electrical sampling circuit includes a diode D1, resistors R1 and R2, and a capacitor C1, wherein the anode of the diode D1 is connected to the primary winding of the transformer, the cathode thereof is connected to the ground in series via resistors R1 and R2, the connection point of the resistors R1 and R2 is used as the output terminal of the electrical sampling circuit and is connected to the sampling pin of the first single chip, and the capacitor C1 is connected to both ends of the resistor R2.
The isolation circuit comprises a first optical coupling module and a second optical coupling module; the input end of the first optocoupler module is connected with a signal output pin of the first singlechip, and the output end of the first optocoupler module is connected with a signal input pin of the third singlechip; the input end of the second optocoupler module is connected with a signal output pin of the third single chip microcomputer, and the output end of the second optocoupler module is connected with a signal input pin of the second single chip mechanism. The power control circuit comprises a controllable silicon connected to an output line of the non-isolated terminal.
Example two
Referring to fig. 3, the difference from the first embodiment is that the first single chip microcomputer and the second single chip microcomputer are implemented by the same single chip microcomputer chip.
According to the first and second embodiments, the first single chip microcomputer arranged at the non-isolation end of the isolation circuit is used for conducting electric sampling, and the optical coupling module is used for isolating the transmission signal to the third single chip microcomputer arranged at the isolation end, so that the risk that the second single chip microcomputer is directly connected with the non-isolation end for conducting sampling is avoided, and the electric isolation degree of the circuit is guaranteed. And the first single chip microcomputer is used for isolating and transferring the sampling signal, so that the matching problem of the sampling voltage and the output signal is well solved, the circuit structure of the electric sampling circuit can be simplified, the output signal of the first single chip microcomputer can meet the input requirement of the optical coupling module, the complicated sampling circuit design is not needed, and the whole implementation cost is low. Meanwhile, the third single chip microcomputer generates a corresponding control signal according to the voltage information fed back by the first single chip microcomputer and preset power control parameters, the control signal is output to the second single chip microcomputer through the optocoupler module, the performance of the third single chip microcomputer at the isolation end is fully utilized, the performance and design requirements on the first single chip microcomputer and the second single chip microcomputer can be reduced, electrical isolation is achieved, and safety is high.
In addition, the first single chip microcomputer can be selected by newly arranging a single chip microcomputer chip or directly using a switch chip of a non-isolation end, the cost of the first single chip microcomputer is not greatly increased, and the cost of the second single chip microcomputer can be further reduced without greatly changing the original isolation power supply circuit. In the second embodiment, the first single chip microcomputer and the second single chip microcomputer are realized on the same single chip microcomputer, so that the change of a circuit is better reduced.
EXAMPLE III
Referring to fig. 2 and 4, the constant power control circuit of the isolated power supply comprises a transformer, wherein a primary winding of the transformer is connected with an alternating current source, a secondary winding of the transformer is connected with a load, a first singlechip and an electric sampling circuit are arranged at a non-isolated end of the isolated power supply, and a third singlechip is arranged at an isolated end of the isolated power supply; the sampling pin of the first single chip microcomputer is connected with the electric sampling circuit to obtain the electric signal change of the input side, and the first single chip microcomputer is used for controlling the output power of the non-isolation end of the isolation circuit and is connected with the power control circuit; the third singlechip is used for sending power control parameters to the first singlechip; the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the first single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals. The electric sampling circuit comprises a diode D1, resistors R1 and R2 and a capacitor C1, wherein the anode of the diode D1 is connected with the primary winding of the transformer, the cathode of the diode D1 is connected with the ground in series through the resistors R1 and R2, the connection point of the resistors R1 and R2 is used as the output end of the electric sampling circuit and is connected with the sampling pin of the first singlechip, and the capacitor C1 is connected to the two ends of the resistor R2 in parallel. The isolation circuit comprises a second optical coupling module, the input end of the second optical coupling module is connected with the signal output pin of the third single chip microcomputer, and the output end of the second optical coupling module is connected with the signal input pin of the first single chip microcomputer. The power control circuit comprises a controllable silicon connected to an output line of the non-isolated terminal.
In the embodiment, the first single chip microcomputer is used for voltage information sampling and power control, is connected with the third single chip microcomputer through the optocoupler module, is connected with power control parameters sent by the third single chip microcomputer, and is combined with real-time acquired voltage information to dynamically adjust the on-off state of the silicon controlled rectifier so as to achieve the purpose of constant power control. The third single chip microcomputer is used for controlling an isolation end (weak current part) of the isolation power supply, and acquires a corresponding control instruction from an upper system through connecting a network module, or acquires a corresponding control instruction through connecting an operation key or a touch screen.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (9)
1. A constant power control circuit of an isolated power supply comprises a transformer, wherein a primary winding of the transformer is connected with an alternating current source, and a secondary winding of the transformer is connected with a load, and is characterized in that: the non-isolated end of the isolated power supply is provided with a first single chip microcomputer, a second single chip microcomputer and an electric sampling circuit, and the isolated end of the isolated power supply is provided with a third single chip microcomputer; the sampling pin of the first single chip microcomputer is connected with an electric sampling circuit to obtain the electric signal change of an input side, and the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the second singlechip is used for controlling the output power of the non-isolated end of the isolation circuit and is connected with a power control circuit; the first single chip microcomputer and the third single chip microcomputer and the second single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals.
2. The isolated power supply constant power control circuit of claim 1, wherein: the electric sampling circuit comprises a diode D1, resistors R1 and R2 and a capacitor C1, wherein the anode of the diode D1 is connected with the primary winding of the transformer, the cathode of the diode D1 is connected with the ground in series through the resistors R1 and R2, the connection point of the resistors R1 and R2 is used as the output end of the electric sampling circuit and is connected with the sampling pin of the first singlechip, and the capacitor C1 is connected to the two ends of the resistor R2 in parallel.
3. The isolated power supply constant power control circuit of claim 1, wherein: the isolation circuit comprises a first optical coupling module and a second optical coupling module; the input end of the first optocoupler module is connected with a signal output pin of the first singlechip, and the output end of the first optocoupler module is connected with a signal input pin of the third singlechip; the input end of the second optocoupler module is connected with a signal output pin of the third single chip microcomputer, and the output end of the second optocoupler module is connected with a signal input pin of the second single chip mechanism.
4. The isolated power supply constant power control circuit according to any one of claims 1-3, wherein: the first single chip microcomputer and the second single chip microcomputer are realized by the same single chip microcomputer chip.
5. The isolated power supply constant power control circuit according to any one of claims 1-3, wherein: the power control circuit comprises a controllable silicon connected to an output line of the non-isolated terminal.
6. A constant power control circuit of an isolated power supply comprises a transformer, wherein a primary winding of the transformer is connected with an alternating current source, and a secondary winding of the transformer is connected with a load, and is characterized in that: the non-isolated end of the isolated power supply is provided with a first single chip microcomputer and an electric sampling circuit, and the isolated end of the isolated power supply is provided with a third single chip microcomputer; the sampling pin of the first single chip microcomputer is connected with the electric sampling circuit to obtain the electric signal change of the input side, and the first single chip microcomputer is used for controlling the output power of the non-isolation end of the isolation circuit and is connected with the power control circuit; the third singlechip is used for sending power control parameters to the first singlechip; the electric sampling circuit is arranged on or connected to a primary winding of the transformer; the first single chip microcomputer and the third single chip microcomputer are connected through an isolation circuit and transmit signals.
7. The isolated power supply constant power control circuit of claim 6, wherein: the electric sampling circuit comprises a diode D1, resistors R1 and R2 and a capacitor C1, wherein the anode of the diode D1 is connected with the primary winding of the transformer, the cathode of the diode D1 is connected with the ground in series through the resistors R1 and R2, the connection point of the resistors R1 and R2 is used as the output end of the electric sampling circuit and is connected with the sampling pin of the first singlechip, and the capacitor C1 is connected to the two ends of the resistor R2 in parallel.
8. The isolated power supply constant power control circuit of claim 6, wherein: the isolation circuit comprises a second optical coupling module, the input end of the second optical coupling module is connected with the signal output pin of the third single chip microcomputer, and the output end of the second optical coupling module is connected with the signal input pin of the first single chip microcomputer.
9. The isolated power supply constant power control circuit of claim 6, wherein: the power control circuit comprises a controllable silicon connected to an output line of the non-isolated terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120834885.0U CN214707566U (en) | 2021-04-22 | 2021-04-22 | Constant power control circuit of isolated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120834885.0U CN214707566U (en) | 2021-04-22 | 2021-04-22 | Constant power control circuit of isolated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214707566U true CN214707566U (en) | 2021-11-12 |
Family
ID=78533032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120834885.0U Active CN214707566U (en) | 2021-04-22 | 2021-04-22 | Constant power control circuit of isolated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214707566U (en) |
-
2021
- 2021-04-22 CN CN202120834885.0U patent/CN214707566U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102196618B (en) | LED illumination driving circuit and method | |
| EP4071964A1 (en) | Electronic device, wireless charging receiving apparatus, wireless charging control method and wireless charging system | |
| EP3944491A1 (en) | Inverter, combiner box and photovoltaic system | |
| CN104184341A (en) | Power supply device | |
| CN214707566U (en) | Constant power control circuit of isolated power supply | |
| US11368098B2 (en) | Power system with communication function applied to solid state transformer structure and communication module applied to solid state transformer structure | |
| CN215180474U (en) | Non-isolated terminal voltage monitoring circuit of isolated power supply | |
| CN210441403U (en) | Air conditioner power consumption control system and air conditioner | |
| CN109618454B (en) | LED dimming control system | |
| CN209949485U (en) | Single live wire switch circuit | |
| CN111194125A (en) | Lighting circuit compatible with high-power emergency driving and having emergency dimming function | |
| CN213818257U (en) | LED lighting driving circuit | |
| CN219833801U (en) | Charger circuit and chip | |
| CN112332673B (en) | Network communication power supply with digital signal isolation | |
| TWI699065B (en) | Power system applied to solid state transformer structure with communication function and communication module applied to solid state transformer structure | |
| CN218068639U (en) | Adjustable sampling circuit of output and switching power supply based on single chip microcomputer control | |
| CN218733206U (en) | Detection protection circuit of power generation power supply controller of aero-generator | |
| TWI742830B (en) | Network communication power supply with digital signal isolation | |
| CN219372629U (en) | LED driving power supply and LED lamp | |
| CN214544139U (en) | Power supply with multiple inputs | |
| CN212258925U (en) | Novel solid-state relay | |
| CN217655184U (en) | Isolating device and ammeter | |
| CN211880674U (en) | Controller, control system and lamps and lanterns | |
| CN210225849U (en) | Factory lighting system and intelligent brightness adjusting lamp control device thereof | |
| CN220492978U (en) | Input undervoltage sampling circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |