CN202840989U - Power supply circuit - Google Patents

Power supply circuit Download PDF

Info

Publication number
CN202840989U
CN202840989U CN2012204042495U CN201220404249U CN202840989U CN 202840989 U CN202840989 U CN 202840989U CN 2012204042495 U CN2012204042495 U CN 2012204042495U CN 201220404249 U CN201220404249 U CN 201220404249U CN 202840989 U CN202840989 U CN 202840989U
Authority
CN
China
Prior art keywords
circuit
diode
resistance
electric capacity
switching tube
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.)
Expired - Lifetime
Application number
CN2012204042495U
Other languages
Chinese (zh)
Inventor
马学军
蒋传乐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Breo Technology Co Ltd
Original Assignee
Shenzhen Breo Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Breo Technology Co Ltd filed Critical Shenzhen Breo Technology Co Ltd
Priority to CN2012204042495U priority Critical patent/CN202840989U/en
Application granted granted Critical
Publication of CN202840989U publication Critical patent/CN202840989U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

  • Filters And Equalizers (AREA)

Abstract

The utility model is suitable for the power supply field and provides a power supply circuit, comprising a voltage reduction circuit, a rectification circuit, a voltage-stabilization filter circuit, a DC output circuit and a control circuit successively connected with each other. An input terminal of the voltage reduction circuit is connected with an external mains AC power supply. An output terminal of the control circuit is connected with a control terminal of the voltage reduction circuit. An output current value is adjusted by controlling a total-capacitance value. The power supply circuit provided by the utility model changes the total-capacitance value in the capacitance-resistance voltage reduction circuit by controlling one or more capacitors in the capacitance-resistance voltage reduction circuit of a circuit switch, thereby adjusting the output current value. Circuit load capacity is enhanced and stand-by power consumption is reduced. Energy consumption can be reduced and circuit security can be raised.

Description

A kind of power circuit
Technical field
The utility model belongs to field of power supplies, relates in particular to a kind of power circuit.
Background technology
At present, a lot of low-power consumption, the power circuit that carrying load ability is large all is to adopt switching power circuit, and cost is high, and circuit is complicated, is difficult for satisfying EMC Requirements.In the prior art, the power consumption of general capacitance-resistance voltage reduction circuit mainly consumes on direct current power, and power consumption is uncontrolled, and stand-by power consumption is the same with the power consumption of working, and when the larger operating current of needs, mainly is to be determined by the decompression capacitor capacity.Therefore the capacitance-resistance voltage reduction circuit of prior art exists power consumption large, the shortcoming that carrying load ability is less equally.And the capacitance of prior art is not allowed to be easy to do greatly.
The utility model content
The purpose of this utility model is to provide the power circuit that a kind of carrying load ability is strong, stand-by power consumption is low.
The utility model is achieved in that a kind of power circuit, comprises the reduction voltage circuit, rectification circuit, filter circuit of pressure-stabilizing, dc output circuit and the control circuit that connect successively; The input of described reduction voltage circuit connects outside mains ac power supply, and the output of described control circuit is connected to the control end of described reduction voltage circuit, by controlling total capacitance value regulation output current value in the described reduction voltage circuit.
Further, described reduction voltage circuit comprises the 4th electric capacity and the first resistance that is connected in parallel and the first electric capacity; End in the end that is connected in parallel of described the first resistance and the first electric capacity is as the input of described reduction voltage circuit, and the other end is as the output of described reduction voltage circuit; One end of described the 4th electric capacity is connected to the end in the described end that is connected in parallel, and the other end of described the 4th electric capacity is as the control end of described reduction voltage circuit.
Further, described rectification circuit comprises: the first diode, the 3rd diode, the 4th diode and the 5th diode; The anode of described the 3rd diode is as the input of described rectification circuit, and the negative electrode of described the 3rd diode is as the output of described rectification circuit; The negative electrode of described the first diode is connected to the negative electrode of described the 3rd diode, the negative electrode of described the 4th diode is connected to the anode of described the first diode, the anodic bonding of described the 5th diode is to the anode of described the 4th diode, and the negative electrode of described the 5th diode is connected to the anode of described the 3rd diode.
Further, described filter circuit of pressure-stabilizing comprises: the second electric capacity that is connected in parallel successively, the 3rd electric capacity, the second resistance and the second diode.
Further, described control circuit comprises: optical coupling module, the 5th resistance, the 6th resistance, the 7th resistance, the 5th electric capacity and switching tube; One end of described the 7th resistance be connected to described the first resistance and the first electric capacity be connected in parallel the end in the other end, one end of described the 5th electric capacity is connected to the other end of described the 7th resistance, and the other end of described the 5th electric capacity is connected to the other end of described the 4th electric capacity; One end of described switching tube is connected with an end of described the 7th resistance, and the other end of switching tube is connected with the other end of described the 5th electric capacity, and the control end of switching tube is connected with an end of described switching tube by described the 6th resistance; Described switching tube is according to an end of the Signal-controlled switch pipe of control end and the conducting between the other end; Optical coupling module comprises six ports, the first port is unsettled, the second port is connected to the anode of described the second diode, the 3rd port is connected with described dc output circuit, the 4th port is connected with the control end of described switching tube, five-port is unsettled, and the 6th port is connected to the other end of described switching tube by the 5th resistance.
Further, described switching tube is thyristor.
Further, described control circuit comprises: relay and the 6th diode; Wherein relay comprises switch and coil, one end of switch be connected to described the first resistance and the first electric capacity be connected in parallel the end in the other end, the other end of switch is connected to the other end of described the 4th electric capacity, one end of coil is connected to the output of described filter circuit of pressure-stabilizing, and the other end of described coil is connected with described dc output circuit; The negative electrode of described the 6th diode is connected to an end of described coil, and the anodic bonding of described the 6th diode is to the other end of described coil.
The utility model is to utilize capacitance size in the intelligent micro-control central processing unit control capacitance-resistance voltage reduction circuit to come the size of regulating load electric current, thereby so that the circuit carrying load ability strengthens, stand-by power consumption reduces; Energy loss can be reduced, the fail safe of circuit can be improved again.
Description of drawings
Fig. 1 is the modular structure block diagram of the power circuit that provides of the utility model embodiment;
Fig. 2 is the physical circuit figure of the power circuit that provides of embodiment of the utility model;
Fig. 3 is the physical circuit figure of the power circuit that provides of another embodiment of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 shows the modular structure block diagram of the power circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows:
Power circuit comprises reduction voltage circuit 1, rectification circuit 2, filter circuit of pressure-stabilizing 3, dc output circuit 5 and the control circuit 4 that connects successively; Wherein, the input of reduction voltage circuit 1 connects outside mains ac power supply, and the output of control circuit 4 is connected to the control end of reduction voltage circuit 1, by total capacitance value regulation output current value in the controlled hypotension circuit 1.
Total capacitance value in the capacitance-resistance voltage reduction circuit that the power circuit that the utility model embodiment provides changes by one or more electric capacity in the control circuit switch capacitance-resistance voltage reduction circuit, and then regulation output current value; Thereby so that the circuit carrying load ability strengthens, stand-by power consumption reduces; Energy loss can be reduced, the fail safe of circuit can be improved again.
Fig. 2 shows the physical circuit of the power circuit that embodiment of the utility model provides, and wherein reduction voltage circuit 1 comprises the 4th capacitor C 4 and the first resistance R 1 that is connected in parallel and the first capacitor C 1; End in the end that is connected in parallel of the first resistance R 1 and the first capacitor C 1 is as the input of reduction voltage circuit 1, and the other end is as the output of reduction voltage circuit 1; One end of the 4th capacitor C 4 is connected to the end in the end that is connected in parallel, and the other end of the 4th capacitor C 4 is as the control end of reduction voltage circuit 1.
Rectification circuit 2 comprises: the first diode D1, the 3rd diode D3, the 4th diode D4 and the 5th diode D5; The anode of the 3rd diode D3 is as the input of rectification circuit 2, and the negative electrode of the 3rd diode D3 is as the output of rectification circuit 2; The negative electrode of the first diode D 1 is connected to the negative electrode of the 3rd diode D3, the negative electrode of the 4th diode D4 is connected to the anode of the first diode D1, the anode of anodic bonding to the four diode D4 of the 5th diode D5, the negative electrode of the 5th diode D5 is connected to the anode of the 3rd diode D3.
Filter circuit of pressure-stabilizing 3 comprises: the second capacitor C 2 that is connected in parallel successively, the 3rd capacitor C 3, the second resistance R 2 and the second diode D2.
Control circuit 4 comprises: optical coupling module U1, the 6th resistance R 6, the 7th resistance R 7, the 5th capacitor C 5 and switching tube Q1; One end of the 7th resistance R 7 be connected to the first resistance R 1 and the first capacitor C 1 be connected in parallel the end in the other end, an end of the 5th capacitor C 5 is connected to the other end of the 7th resistance R 7, the other end of the 5th capacitor C 5 is connected to the other end of the 4th capacitor C 4; One end of switching tube 40 is connected with an end of the 7th resistance R 7, and the other end of switching tube 40 is connected with the other end of the 5th capacitor C 5, and the control end of switching tube 40 is connected with an end of switching tube 40 by the 6th resistance R 6; Optical coupling module U1 comprises six ports, the first port is unsettled, the second port is connected to the anode of the second diode D2, the 3rd port is connected with dc output circuit 5, the 4th port is connected with the control end of switching tube 40, five-port is unsettled, and the 6th port is connected to the other end of switching tube 40 by the 5th resistance R 5.When needs enlarge load current, MCU sends instruction, optical coupling module U1 the 3rd pin becomes low level, optical coupling module U1 interior light emitting diodes is lighted, the inner transistor base triggering and conducting of optical coupling module U1, inner transistor collector conducting, the 4th capacitor C 4 connects to advance circuit, thus the circuit load electric current increases.When not needing to enlarge load current, the 3rd pin of optical coupling module U1 is always high level, and optical coupling module U1 does not work, and the 4th capacitor C 4 is separated with circuit, at this moment the stand-by power consumption step-down.
As an embodiment of the present utility model, switching tube 40 can be the switch elements such as thyristor.
Dc output circuit 5 comprises J1, J1 is the connector of power panel and MCU control centre, and dc output circuit 5 is specially MCU control centre, in the situation that stand-by operation state and large current load are closed, MCU sends the instruction that disconnects C4, reaches the purpose of low-power consumption standby; When large current load needed work, MCU sent the instruction of connecting C4, reached the purpose that enlarges load current.
Fig. 3 shows the physical circuit of the power circuit that another embodiment of the utility model provides, compare with Fig. 2, the physical circuit of reduction voltage circuit 1, rectification circuit 2, filter circuit of pressure-stabilizing 3 and dc output circuit 5 is all identical, only has the physical circuit of control circuit 4 different; Control circuit 4 comprises: relay J DQ1 and the 6th diode D6; Wherein relay J DQ1 comprises switch and coil, one end of switch be connected to the first resistance R 1 and the first capacitor C 1 be connected in parallel the end in the other end, the other end of switch is connected to the other end of the 4th capacitor C 4, one end of coil is connected to the output of filter circuit of pressure-stabilizing 3, and the other end of coil is connected with dc output circuit 5; The negative electrode of the 6th diode D6 is connected to an end of coil, and the anodic bonding of the 6th diode D6 is to the other end of coil.
In the utility model embodiment, the utility model is to utilize capacitance size in the intelligent micro-control central processing unit control capacitance-resistance voltage reduction circuit to come the size of regulating load electric current, thereby so that the circuit bringing onto load can ability strengthen, stand-by power consumption reduces; Energy loss can be reduced, the fail safe of circuit can be improved again.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims (7)

1. a power circuit is characterized in that, comprises the reduction voltage circuit, rectification circuit, filter circuit of pressure-stabilizing, dc output circuit and the control circuit that connect successively; The input of described reduction voltage circuit connects outside mains ac power supply, and the output of described control circuit is connected to the control end of described reduction voltage circuit, by controlling total capacitance value regulation output current value in the described reduction voltage circuit.
2. power circuit as claimed in claim 1 is characterized in that, described reduction voltage circuit comprises the 4th electric capacity and the first resistance that is connected in parallel and the first electric capacity;
End in the end that is connected in parallel of described the first resistance and the first electric capacity is as the input of described reduction voltage circuit, and the other end is as the output of described reduction voltage circuit;
One end of described the 4th electric capacity is connected to the end in the described end that is connected in parallel, and the other end of described the 4th electric capacity is as the control end of described reduction voltage circuit.
3. power circuit as claimed in claim 2 is characterized in that, described rectification circuit comprises: the first diode, the 3rd diode, the 4th diode and the 5th diode;
The anode of described the 3rd diode is as the input of described rectification circuit, and the negative electrode of described the 3rd diode is as the output of described rectification circuit;
The negative electrode of described the first diode is connected to the negative electrode of described the 3rd diode, the negative electrode of described the 4th diode is connected to the anode of described the first diode, the anodic bonding of described the 5th diode is to the anode of described the 4th diode, and the negative electrode of described the 5th diode is connected to the anode of described the 3rd diode.
4. power circuit as claimed in claim 3 is characterized in that, described filter circuit of pressure-stabilizing comprises: the second electric capacity that is connected in parallel successively, the 3rd electric capacity, the second resistance and the second diode.
5. power circuit as claimed in claim 4 is characterized in that, described control circuit comprises: optical coupling module, the 5th resistance, the 6th resistance, the 7th resistance, the 5th electric capacity and switching tube;
One end of described the 7th resistance be connected to described the first resistance and the first electric capacity be connected in parallel the end in the other end, one end of described the 5th electric capacity is connected to the other end of described the 7th resistance, and the other end of described the 5th electric capacity is connected to the other end of described the 4th electric capacity;
One end of described switching tube is connected with an end of described the 7th resistance, and the other end of switching tube is connected with the other end of described the 5th electric capacity, and the control end of switching tube is connected with an end of described switching tube by described the 6th resistance; Described switching tube is according to an end of the Signal-controlled switch pipe of control end and the conducting between the other end;
Optical coupling module comprises six ports, the first port is unsettled, the second port is connected to the anode of described the second diode, the 3rd port is connected with described dc output circuit, the 4th port is connected with the control end of described switching tube, five-port is unsettled, and the 6th port is connected to the other end of described switching tube by the 5th resistance.
6. power circuit as claimed in claim 5 is characterized in that, described switching tube is thyristor.
7. power circuit as claimed in claim 4 is characterized in that, described control circuit comprises relay and the 6th diode; Described relay comprises switch and coil, one end of switch be connected to described the first resistance and the first electric capacity be connected in parallel the end in the other end, the other end of switch is connected to the other end of described the 4th electric capacity, one end of coil is connected to the output of described filter circuit of pressure-stabilizing, and the other end of described coil is connected with described dc output circuit;
The negative electrode of described the 6th diode is connected to an end of described coil, and the anodic bonding of described the 6th diode is to the other end of described coil.
CN2012204042495U 2012-08-15 2012-08-15 Power supply circuit Expired - Lifetime CN202840989U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012204042495U CN202840989U (en) 2012-08-15 2012-08-15 Power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012204042495U CN202840989U (en) 2012-08-15 2012-08-15 Power supply circuit

Publications (1)

Publication Number Publication Date
CN202840989U true CN202840989U (en) 2013-03-27

Family

ID=47952587

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012204042495U Expired - Lifetime CN202840989U (en) 2012-08-15 2012-08-15 Power supply circuit

Country Status (1)

Country Link
CN (1) CN202840989U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414358A (en) * 2013-08-23 2013-11-27 深圳市力生美半导体器件有限公司 Power supply circuit and construction method thereof
CN103516234A (en) * 2012-08-15 2014-01-15 深圳市倍轻松科技股份有限公司 Power source circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103516234A (en) * 2012-08-15 2014-01-15 深圳市倍轻松科技股份有限公司 Power source circuit
CN103414358A (en) * 2013-08-23 2013-11-27 深圳市力生美半导体器件有限公司 Power supply circuit and construction method thereof

Similar Documents

Publication Publication Date Title
CN202840989U (en) Power supply circuit
CN201097176Y (en) Power controller
CN102299629A (en) Power supply control method and power supply device for direct-current high-voltage power supply
CN203660640U (en) Economical power failure maintenance circuit
CN201656795U (en) Resistance-capacitance pressure relief device
CN103647314B (en) A kind of super-capacitor charge protection device
CN206117538U (en) Switching power supply circuit device that convergence was inputed in zero standby
CN204316323U (en) A kind of SS (soft start) control circuit
CN204721218U (en) Boosting and linear-charging share the portable power source transducer of power device
CN203608099U (en) Refrigeration device and power supply used in control system of refrigeration device
CN103516234A (en) Power source circuit
CN207182006U (en) Utilize the regular socket of the capacitor step-down power supply of self-adapting load power
CN202889213U (en) Low-power-consumption double-channel double-power-supply energy-saving circuit
CN202889232U (en) Low-power-consumption double-channel power supply energy-saving circuit
CN203014706U (en) Power supply device with high efficiency alternating current and direct current same port input for cameras
CN207426973U (en) The linear voltage-stabilizing circuit of High Pressure Difference exchange input
CN205490199U (en) Resistance -capacitance reduction voltage circuit
CN207039960U (en) A kind of single battery boosting LED drive circuit
CN103107716A (en) Resistive and capacitive voltage reducing device
CN204905976U (en) Power management means
CN202750017U (en) Power supply circuit
CN202135070U (en) Dual-voltage capacitance-resistance voltage-reduction energy saving circuit
CN203466742U (en) LED driving power supply
CN204349801U (en) Switching power circuit
CN104393747B (en) It is a kind of to turn low-power consumption and under-voltage protection BOOST type DC DC converter circuits automatically

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20130327