CN206452295U - A kind of power protecting circuit and power supply - Google Patents
A kind of power protecting circuit and power supply Download PDFInfo
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- CN206452295U CN206452295U CN201720118568.2U CN201720118568U CN206452295U CN 206452295 U CN206452295 U CN 206452295U CN 201720118568 U CN201720118568 U CN 201720118568U CN 206452295 U CN206452295 U CN 206452295U
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Abstract
The utility model belongs to power technique fields, and there is provided a kind of power protecting circuit and power supply.In the utility model, by using including the power protecting circuit of protection module and power supply module, so that starting moment in load, protection module works prior to surge restraint circuit, and surge current in the alternating current that surge restraint circuit is exported to external power source is when carrying out Surge suppression, surge restraint circuit is protected, rectification circuit carries out rectification to alternating current and handles backward accumulator progress quick charge, and when power supply disconnects with the load, protection module disconnects after surge restraint circuit, the reliability of surge restraint circuit is improved with this, cause the problem of power supply is damaged because reliability is low so as to solve existing power surge suppression circuit and exist.
Description
Technical field
The utility model belongs to power technique fields, more particularly to a kind of power protecting circuit and power supply.
Background technology
With the development of server power supply technology, power supply is inputted by single alternating current (alternating current, AC)
Gradually develop into the mode of compatible with alternating electricity/direct current (Direct Current, DC) input.And in traditional ac-input power supply electricity
Lu Zhong, to solve surge and efficiency, prior art is generally using relay negative temperature coefficient (Negative in parallel
Temperature Coefficient, NTC) resistance, positive temperature coefficient (Positive Temperature Coefficient,
PTC) mode of resistance or fixed value cement resistor realizes Surge suppression, such as the conventional AC input power wave shown in Fig. 1
Gush suppression circuit.
As shown in figure 1, in existing alternating current input power supplying surge restraint circuit, due to RC circuits and NTC/PTC or water
The inherent characteristic of mud resistance, under Large Copacity large volume electric capacity, relay RLY can not realize zero voltage switching in adhesive moment,
Relay RLY adhesives instantaneous power can produce secondary surge simultaneously, even and if the zero crossing of AC input presence causes relay RLY
The regulation of the aspect of power safety can be met, but it equally exists the risk of harm, and then reduce power surge suppression electricity
The reliability on road；In addition, certain safe arc extinguishing of model DC relay resistive load and life expectancy and switch according to Fig. 2
Circuit relationships schematic diagram understands that relay is with the increase of switching current, the safe extinguishing voltage of its normally opened contact and life expectancy
Exponentially declines, therefore, and when input power is that DC is inputted, relay RLY can not realize zero voltage switching in adhesive moment, together
When can produce secondary surge and endanger relay even more serious in itself, and then reduce the reliability of power surge suppression circuit,
So as to be caused damage to power supply.
In summary, existing power surge suppression circuit is present causes the problem of power supply is damaged because reliability is low.
Utility model content
The purpose of this utility model is to provide a kind of power protecting circuit and power supply, it is intended to solve existing power surge
Suppression circuit is present causes the problem of power supply is damaged because reliability is low.
The utility model is achieved in that a kind of power protecting circuit, surge restraint circuit, rectification circuit with power supply
And controller is connected, the control end of the surge restraint circuit is connected with the first output end of the controller, the surge
The first input end of suppression circuit and the live wire of external power source are connected, the output end of the surge restraint circuit and the rectified current
The first input end connection on road, the second input of the rectification circuit is connected with the zero line of the external power source, the rectification
First output end of circuit and the first end of accumulator are connected, and are powered to the load, the second output end of the rectification circuit
Ground is connected to altogether with the second end of the accumulator, and the power protecting circuit includes：
Protection module and power supply module；
The first input end of the protection module is connected with the first input end of the surge restraint circuit, the protection mould
The control end of block is connected with the second output end of the controller, the second input and the Surge suppression of the protection module
Second input of circuit is connected to the first output end of the power supply module altogether, the 3rd input of the protection module with it is described
The second output end connection of power supply module, it is the output end of the output end of the protection module and the surge restraint circuit, described
3rd output end of the first input end of rectification circuit and the power supply module connects altogether, the first input end of the power supply module
The first supply voltage and second source voltage are received respectively with the second input；
The power supply module is according to first supply voltage and the second source voltage to the surge restraint circuit
The first operating voltage is provided with the protection module, while providing the second operating voltage to the protection module；
Start moment in the load, the controller exports the first control signal to the protection module, and is spaced the
The backward surge restraint circuit of one preset time exports the second control signal, and the protection module is in the control signal, institute
State conducting in the presence of the first operating voltage and second operating voltage, and in the surge restraint circuit according to described the
Surge current in the alternating current that two control signals and first operating voltage are exported to the external power source carries out surge suppression
When processed, the surge restraint circuit is protected, it is backward described that the rectification circuit carries out rectification processing to the alternating current
Accumulator carries out quick charge；
When the power supply disconnects with the load, the controller is believed to the control of surge restraint circuit output the 3rd
Number, and the second preset time the 4th control signal of the backward protection module output is spaced, the surge restraint circuit is according to institute
State the 3rd control signal and export the alternating current to the rectification circuit, the rectification circuit is carried out at rectification to the alternating current
Direct current is provided for the load after reason, the protection module disconnects according to the 4th control signal.
Another object of the present utility model also resides in a kind of power supply of offer, and the power supply includes surge restraint circuit, rectification
Circuit, accumulator, controller and above-mentioned power protecting circuit.
In the utility model, by using including the power protecting circuit of protection module and power supply module so that negative
Carry and start moment, controller exports the first control signal to protection module, and is spaced after the first preset time to Surge suppression electricity
Road exports the second control signal, and protection module is led in the presence of control signal, the first operating voltage and the second operating voltage
It is logical, and the wave in the alternating current that surge restraint circuit is exported according to the second control signal and the first operating voltage to external power source
When gushing electric current progress Surge suppression, surge restraint circuit is protected, it is backward that rectification circuit carries out rectification processing to alternating current
Accumulator carries out quick charge；When power supply disconnects with the load, controller is controlled to surge restraint circuit output the 3rd
Signal, and be spaced after the second preset time to protection module the 4th control signal of output, surge restraint circuit is according to the 3rd control
Signal exports alternating current to rectification circuit, and rectification circuit is protected to providing direct current after alternating current progress rectification processing for load
Module disconnects according to the 4th control signal, and then realizes protection circuit prior to surge restraint circuit conducting, and after surge suppression
Circuit processed disconnects, so as to be protected to surge restraint circuit, to improve the reliability of surge restraint circuit, solves existing
Power surge suppression circuit is present causes the problem of power supply is damaged because reliability is low.
Brief description of the drawings
Fig. 1 is the electrical block diagram of conventional AC input power surge restraint circuit；
Fig. 2 is that certain existing safe arc extinguishing of model DC relay resistive load and life expectancy are shown with on-off circuit relation
It is intended to；
Fig. 3 is the modular structure schematic diagram for the power protecting circuit that the embodiment of the utility model one is provided；
Fig. 4 is the modular structure schematic diagram for the power protecting circuit that another embodiment of the utility model is provided；
Fig. 5 is the circuit structure signal of protection module in the power protecting circuit that the embodiment of the utility model one is provided
Figure；
Fig. 6 is the circuit structure signal of power supply module in the power protecting circuit that the embodiment of the utility model one is provided
Figure；
Fig. 7 is the modular structure schematic diagram for the power supply that the embodiment of the utility model one is provided.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
Realization of the present utility model is described in detail below in conjunction with specific accompanying drawing：
Fig. 3 shows the modular structure for the power protecting circuit 3 that the embodiment of the utility model one is provided, for the ease of saying
It is bright, part related to the present embodiment is illustrate only, details are as follows：
As shown in figure 3, power protecting circuit 1 and the surge restraint circuit 2 of power supply that the utility model embodiment is provided,
Rectification circuit 3 and controller 4 are connected.Wherein, the control end of surge restraint circuit 2 is connected with the first output end of controller 4,
The first input end of surge restraint circuit 2 is connected with the live wire L of external power source (not shown), surge restraint circuit 2 it is defeated
Go out end to be connected with the first input end of rectification circuit 3, the zero line N connections of the second input and external power source of rectification circuit 3 are whole
First output end of current circuit 3 is connected with the first end of accumulator 5, and is powered to load (not shown), rectification circuit
3 the second output end is connected to ground altogether with the second end of accumulator 5.
Further, power protecting circuit 1 includes protection module 10 and power supply module 12.
Wherein, the first input end of protection module 10 is connected with the first input end of surge restraint circuit 2, protection module 10
Control end be connected with the second output end of controller 4, the second input of protection module 10 and the second of surge restraint circuit 2
Input is connected to the first output end of power supply module 12, the 3rd input of protection module 10 and the second of power supply module 12 altogether
Output end is connected, the output end of protection module 10 and the output end of surge restraint circuit 2, rectification circuit 3 first input end with
And the 3rd output end of power supply module 12 connects altogether, the first input end of power supply module 12 and the second input receive the first electricity respectively
Source voltage VCC and 12V second source voltage.
Specifically, power supply module 12 according to the first supply voltage VCC and 12V second source voltage to surge restraint circuit
2 and the first operating voltage PVCC of offer of protection module 10 (not shown in figure, refer to Fig. 5), while being provided to protection module 10
Second operating voltage VSCR-G (not shown in figure, refer to Fig. 5).
Start moment in load, controller 4 exports the first control signal to protection module 10, and is spaced the first preset time
Backward surge restraint circuit 2 exports the second control signal, and protection module 10 is in control signal, the first operating voltage PVCC and the
Turned in the presence of two operating voltage VSCR-G, and in surge restraint circuit 2 according to the second control signal and the first operating voltage
When surge current in the alternating current that PVCC is exported to external power source carries out Surge suppression, surge restraint circuit 2 is protected,
Rectification circuit 3 carries out rectification to alternating current and handles the backward progress of accumulator 5 quick charge.
When power supply disconnects with the load, controller 4 exports the 3rd control signal to surge restraint circuit 2, and is spaced
The 4th control signal is exported to protection module 10 after second preset time, surge restraint circuit 2 is according to the 3rd control signal to whole
Current circuit 3 exports alternating current, and rectification circuit 3 for load after alternating current progress rectification processing to providing direct current, protection module 10
Disconnected according to the 4th control signal.
It should be noted that in the utility model embodiment, the first preset time and the second preset time can according to
Family needs to carry out equipment, and the first preset time can be identical with the second time, also can be different, is not particularly limited herein.
In addition, in the present embodiment, the first control signal and the second control signal are high level signal, and the 3rd control letter
Number with the 4th control signal be low level signal；It will be appreciated by persons skilled in the art that in other embodiments, the first control
Signal processed and the second control signal can also be low level signal, and the 3rd control signal and the 4th control signal are high level letter
Number, it is not particularly limited herein；Controller 4 can use single-chip microcomputer, micro-control unit, arm processor and field programmable gate
Array control unit etc. is realized.
Further, as the preferred embodiment of the utility model one, as shown in figure 4, protection module 10 includes control list
Member 100 and protection location 102.
Wherein, the control end of control unit 100 is the control end of protection module 10, the first input end of control unit 100
It is respectively the second input and the 3rd input of protection module 10, the second output end of control unit 100 with the second input
Connect the output end to form protection module 10 altogether with the output end of protection location 102, the input of protection location 102 is protection module
10 first input end, the control end of protection location 102 is connected with the first output end of control unit 100.
Specifically, starting moment in load, control unit 100 is in the first control signal, the first operating voltage and second
Conductivity control signal is exported in the presence of operating voltage to protection location 102, protection location 102 is led according to conductivity control signal
It is logical；When power supply is with the load disconnection, control unit 100 exports shut-off control signal to guarantor under the effect of the 4th control signal
Unit 102 is protected, protection location 102 disconnects according to shut-off control signal.
Further, as the preferred embodiment of the utility model one, as shown in figure 5, control unit 100 includes first
Resistance R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1, the second electric capacity C2, first
Switch element Q1, second switch element Q2 and photoelectrical coupler U1；
First resistor R1 first end is the control end of control unit 100, and second resistance R2 first end is control single 100
The first input end of member, first resistor R1 the second end is connected with first switching element Q1 control end, and the of second resistance R2
Two ends are connected with photoelectrical coupler U1 first end, photoelectrical coupler U1 the second end and first switching element Q1 input
Connection, first switching element Q1 output head grounding, photoelectrical coupler U2 the 3rd end and second switch element Q2 input
And second electric capacity C2 first end connect the second input to form control unit 100 altogether, photoelectrical coupler U1 the 4th end with
Second switch element Q2 control end and 3rd resistor R3 first end connect altogether, 3rd resistor R3 the second end and the 4th resistance
R4 first end connection, the 4th resistance R4 first end is total to the first electric capacity C1 first end and the 5th resistance R5 first end
Connect the first output end to form control unit 100, the 5th resistance R5 the second end and the first electric capacity C1 the second end and second
Electric capacity C2 the second end connects the second output end to form control unit 100 altogether.
It should be noted that in the present embodiment, first switching element Q1 is NPN type triode, the NPN type triode
Base stage, colelctor electrode and emitter stage be respectively first switching element Q1 control end, input and output end；This area
Technical staff is it is understood that in other embodiments, first switching element Q1 can also be brilliant for PNP type triode, NMOS
Body pipe or PMOS transistor, are not limited herein.
In addition, second switch element Q2 is NPN type triode, base stage, colelctor electrode and the emitter stage of the NPN type triode
Respectively second switch element Q2 control end, input and output end；It will be appreciated by persons skilled in the art that
In other embodiment, second switch element Q2 can also be PNP types triode, nmos pass transistor or PMOS transistor, herein
It is not limited.
Further, as the preferred embodiment of the utility model one, as shown in figure 5, protection location 102 is including controllable
Silicon diode SCR.
Wherein, thyristor diode SCR anode is the input of protection location 102, thyristor diode SCR the moon
The extremely output end of protection location 102, thyristor diode SCR control end is the control end of protection location 102.
Further, as the preferred embodiment of the utility model one, as shown in fig. 6, power supply module 12 includes transformer
T1, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5, the 3rd electric capacity
C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the first electrochemical capacitor TE1, the second electrochemical capacitor
TE2, the 6th resistance R6 and the 7th resistance R7.
Wherein, the 3rd electric capacity C3 first end and the first diode D1 negative electrode connect to form the first of power supply module 12 altogether
Input, the first diode D1 anode is connected with the first end of transformer T1 secondary windings, the second diode D2 anode
Connect altogether with the second end of the 3rd diode D3 anode, the 4th electric capacity C4 first end and transformer T1 secondary windings, the
Two diode D2 negative electrode and the 3rd diode D3 negative electrode, the 6th resistance R6 first end, the 5th electric capacity C5 first end,
First electrochemical capacitor TE1 first end and the 7th resistance R7 first end connect the second input to form power supply module 12 altogether,
4th electric capacity C4 the second end is connected with the 6th resistance R6 the second end, the 5th electric capacity C5 the second end, the first electrochemical capacitor TE1
The second end and the 7th resistance R7 the second end be connected to equipotential end, the first end of transformer T1 the first armature winding altogether
It is connected with the 4th diode D4 anode, the 4th diode D4 negative electrode and the second electrochemical capacitor TE2 first end connect to be formed altogether
First output end of power supply module 12, the second end of transformer T1 the first armature winding and the second of the second electrochemical capacitor TE2
End is connected to ground altogether, and the first end of transformer T1 the second armature winding is connected with the 5th diode D5 anode, the 5th diode
D5 negative electrode connects to form the second defeated of power supply module 12 altogether with the 6th electric capacity C6 first end and the 7th electric capacity C7 first end
Go out end, the second end of transformer T1 the second armature winding and the 6th electric capacity C6 the second end and the 7th electric capacity C7 the second end
The 3rd output end to form power supply module 12 is connect altogether.
Further, as the preferred embodiment of the utility model one, as shown in figure 5, power supply module 12 includes flyback line
Road, the circuit of reversed excitation includes the 3rd armature winding, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, electric capacity C8, electricity
Hold C9, diode D6 and switch element Q3.
Wherein, resistance R8 first end connects altogether with electric capacity C8 first end and the first end of the 3rd armature winding, resistance
R8 the second end is connected to diode D6 negative electrode with electric capacity C8 the second end altogether, and diode D6 anode is with switch element Q3's
The first end of output end, the second end of the 3rd armature winding and resistance R9 connects altogether, and the of resistance R9 the second end and electric capacity C9
One end is connected, electric capacity C9 the second end and the input of resistance R12 first end, resistance R11 first end and switch element Q3
End connects altogether, and switch element Q3 control end and the first end at resistance R11 the second end and resistance R10 connect altogether.
Further, as the preferred embodiment of the utility model one, as shown in figure 5, surge restraint circuit 2 includes electricity
Hinder R13, resistance R14, resistance R15, resistance RJ, negative temperature coefficient resister R, safety element F, switch element Q4, electric capacity C10, electricity
Hold C11, diode D7, voltage-regulator diode D8 and relay RLY.
Wherein, resistance R13 first end is the control end of surge restraint circuit 2, resistance R13 the second end and resistance R14
First end and switch element Q4 control end connection, resistance R14 the second end is connected to altogether with switch element Q4 output end
Ground, switch element Q4 input is connected with the first end of voltage-regulator diode D8 negative electrode and relay RLY, voltage-regulator diode
D8 anode is connected with diode D7 anode, diode D7 negative electrode and resistance R15 first end, electric capacity C11 first end
And electric capacity C10 first end connects the second input to form surge restraint circuit 2, resistance R15 the second end and electric capacity altogether
C11 the second end is connected to relay RLY the second end altogether, and electric capacity C10 the second end is grounded, and relay RLY the 3rd end is with bearing
Temperature coefficient of resistance R first end and resistance RJ first end connect the output end to form surge restraint circuit 2, relay altogether
RLY the 4th end sky is connect, and resistance RJ the second end is connected with insuring device F first end, insurance device F the second end and relay
Device RLY the 5th end connection, relay RLY the 6th end sky connects, and negative temperature coefficient resister R the second end is surge restraint circuit
2 first input end.
It should be noted that in this embodiment, switch element Q4 is NPN type triode, the base stage of the NPN type triode,
Colelctor electrode and emitter stage are respectively switch element Q4 control end, input and output end；Those skilled in the art can
With understanding, in other embodiments, switch element Q4 can also be brilliant for PNP type triode, nmos pass transistor or PMOS
Body pipe, is not limited herein.
Further, as the preferred embodiment of the utility model one, as shown in figure 5, rectification circuit 3 is full-bridge type rectification
Circuit, the whole bridge rectifier circuit includes the first commutation diode D11, the second commutation diode D12, the 3rd commutation diode
D13 and the 4th commutation diode D14.
Wherein, the first commutation diode D11 anode and the 4th commutation diode D14 anode connect to form rectification circuit altogether
3 the second output end, the first commutation diode D11 negative electrode and the second commutation diode D12 anode connect to form rectified current altogether
The first input end on road 3, the second commutation diode D12 negative electrode and the 3rd commutation diode D13 negative electrode connect to form rectification altogether
First output end of circuit 3, the 3rd commutation diode D13 anode and the 4th commutation diode D14 negative electrode connect to form whole altogether
Second input of current circuit 3.
Further, as the preferred embodiment of the utility model one, as shown in figure 5, accumulator 5 includes storage capacitor
C, the first end that C is held in the energy storage is the first end of accumulator 5, and storage capacitor C the second end is the second of accumulator 5
End.
Below by taking the circuit structure shown in Fig. 5 and Fig. 6 as an example, to power protecting circuit 1 provided by the utility model
Operation principle is illustrated, and details are as follows：
First, please also refer to transformer T1 in Fig. 5 and Fig. 6, power supply module 12 according to the first supply voltage VCC and
Photoelectrical coupler U1 of the 12V second source voltage into protection module 10, and the relay into surge surge restraint circuit 2
Device RLY provides the first operating voltage PVCC, while second switch element Q2 into protection module 10 provides input voltage, i.e., and the
Two operating voltage VSCR-G.
Further, Fig. 5 is refer to, moment is started in load, controller 4 is controlled to first switching element Q1 outputs first
Signal processed, and be spaced after the first preset time to switch element Q4 the second control signals of output.First switching element Q1 is
The effect of one control signal is lower to be turned on, and first switching element Q1 and photoelectrical coupler U1 formation paths after conducting so that light
Electric coupler U1 control second switch element Q2 conductings, and the second switch element Q2 control controllable silicon SCR conductings turned on, switch
Element Q4 is turned under the effect of the second control signal, and the supply voltage of switch element Q4 and relay RLY after conducting form logical
Road causes relay RLY adhesives with this, so that relay RLY and negative temperature coefficient resister R and resistance RJ is handed over outside
The surge circuit flowed in the alternating current of power supply output carries out Surge suppression, while rectification circuit 3 carries out rectification processing to alternating current
Backward storage capacitor C carries out quick charge.
It should be noted that because controllable silicon SCR is in parallel, and the conduction voltage drop of controllable silicon SCR with relay RLY
Very little, is generally 1V, therefore, when controllable silicon SCR is turned on, the voltage at relay RLY two ends also very little, so that
Obtaining the surge current of alternating current will not cause damage to relay RLY.
And when power supply disconnects with the load, controller 4 exports the 3rd control signal to switch element Q4, and it is spaced the
After two preset times the 4th control signal is exported to first switching element Q1.Switch element Q4 breaks under the effect of the 4th control signal
Open, so that relay RLY disconnects, while the friendship that negative temperature coefficient resister R and resistance RJ export external ac power source
Flow electricity output to rectification circuit 3, rectification circuit 3 carries out the backward load of rectification processing to alternating current and provides direct current, and this first
Switch element Q1 the 3rd control signal effect under disconnect, and disconnect after first switching element Q1 can not and photoelectrical coupler
U1 formation paths so that photoelectrical coupler U1 does not work, and then second switch element Q2 is disconnected, so that controllable silicon
SCR disconnects.
In the present embodiment, controller 4 is using prior to relay RLY adhesives, after the control mode of relay RLY disconnections
Control controllable silicon SCR so that when controllable silicon SCR is in parallel with relay RLY, and both when being both turned on, controllable silicon SCR can be effective
The voltage at relay RLY two ends is controlled in the range of very little, is approximately zero volt, to prevent load from starting moment to handing over
Surge current in stream electricity causes to damage to relay RLY, and then improves the reliability of surge restraint circuit 2, and causes
Relay RLY its two ends extinguishing voltage in disconnection and adhesive is approximately zero voltage switching, effectively improves the use longevity of relay
Life and stress requirement, while relay RLY can ensure that power-efficient is constant.
Further, Fig. 7 shows the modular structure for the power supply that the embodiment of the utility model one is provided, for the ease of saying
It is bright, the part related to the utility model embodiment is illustrate only, details are as follows：
As shown in fig. 7, the power supply 20 that is provided of the utility model embodiment include surge restraint circuit 2, rectification circuit 3,
The controller 4 of accumulator 5 and power protecting circuit 1.It should be noted that the electricity provided by the utility model embodiment
The power protecting circuit 1 shown in power protecting circuit 1 and Fig. 3 to Fig. 6 in source 20 is identical, and therefore, the embodiment of the present invention is carried
The concrete operating principle of power protecting circuit 1 in the power supply 20 of confession, refers to the detailed description to Fig. 6 previously with regard to Fig. 3, this
Place is repeated no more.
In the present embodiment, by increasing power protection circuit 1 in existing power circuit so that power protection circuit
1 can protect to the relay RLY in surge restraint circuit 2, and make it that relay RLY two ends extinguishing voltage is approximately zero
Voltage switching, and then service life and the stress requirement of relay are effectively improved, so that power supply 20 can meet AC/ simultaneously
DC input requirements, and the power protection circuit 1 is simple in construction, is easy to present power circuit to modify.
In the utility model, by using including the power protecting circuit of protection module and power supply module so that negative
Carry and start moment, controller exports the first control signal to protection module, and is spaced after the first preset time to Surge suppression electricity
Road exports the second control signal, and protection module is led in the presence of control signal, the first operating voltage and the second operating voltage
It is logical, and the wave in the alternating current that surge restraint circuit is exported according to the second control signal and the first operating voltage to external power source
When gushing electric current progress Surge suppression, surge restraint circuit is protected, it is backward that rectification circuit carries out rectification processing to alternating current
Accumulator carries out quick charge；When power supply disconnects with the load, controller is controlled to surge restraint circuit output the 3rd
Signal, and be spaced after the second preset time to protection module the 4th control signal of output, surge restraint circuit is according to the 3rd control
Signal exports alternating current to rectification circuit, and rectification circuit is protected to providing direct current after alternating current progress rectification processing for load
Module disconnects according to the 4th control signal, and then realizes protection circuit prior to surge restraint circuit conducting, and after surge suppression
Circuit processed disconnects, so as to be protected to surge restraint circuit, to improve the reliability of surge restraint circuit, solves existing
Power surge suppression circuit is present causes the problem of power supply is damaged because reliability is low.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modifications, equivalent substitutions and improvements made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of power protecting circuit, is connected with the surge restraint circuit, rectification circuit and controller of power supply, the surge suppression
The control end of circuit processed is connected with the first output end of the controller, first input end and the outside of the surge restraint circuit
The live wire connection of power supply, the output end of the surge restraint circuit is connected with the first input end of the rectification circuit, described whole
Second input of current circuit is connected with the zero line of the external power source, the first output end and accumulator of the rectification circuit
First end connection, and power to the load, the second output end of the rectification circuit connects altogether with the second end of the accumulator
Yu Di；Characterized in that, the power protecting circuit includes：
Protection module and power supply module；
The first input end of the protection module is connected with the first input end of the surge restraint circuit, the protection module
Control end is connected with the second output end of the controller, the second input and the surge restraint circuit of the protection module
The second input be connected to the first output end of the power supply module, the 3rd input and the power supply of the protection module altogether
The second output end connection of module, output end, the rectification of the output end of the protection module and the surge restraint circuit
3rd output end of the first input end of circuit and the power supply module connects altogether, the first input end of the power supply module and
Two inputs receive the first supply voltage and second source voltage respectively；
The power supply module is according to first supply voltage and the second source voltage to the surge restraint circuit and institute
State protection module and the first operating voltage is provided, while providing the second operating voltage to the protection module；
Start moment in the load, the controller exports the first control signal to the protection module, and it is pre- to be spaced first
If the time backward surge restraint circuit exports the second control signal, the protection module is in the control signal, described the
Turned in the presence of one operating voltage and second operating voltage, and in the surge restraint circuit according to the described second control
When surge current in the alternating current that signal processed and first operating voltage are exported to the external power source carries out Surge suppression,
The surge restraint circuit is protected, the rectification circuit carries out the backward energy storage electricity of rectification processing to the alternating current
Road carries out quick charge；
When the power supply disconnects with the load, the controller exports the 3rd control signal to the surge restraint circuit,
And be spaced the backward protection module of the second preset time and export the 4th control signal, the surge restraint circuit is according to described the
Three control signals export the alternating current to the rectification circuit, and the rectification circuit is carried out after rectification processing to the alternating current
Direct current is provided for the load, the protection module disconnects according to the 4th control signal.
2. power protecting circuit according to claim 1, it is characterised in that the protection module includes：Control unit with
Protection location；
The control end of described control unit is the control end of the protection module, the first input end of described control unit and second
Input is respectively the second input and the 3rd input of the protection module, the second output end of described control unit and institute
The output end for stating protection location connects the output end to form the protection module altogether, and the input of the protection location is the protection
The first input end of module, the control end of the protection location and the first output end of described control unit are connected；
Start moment in the load, described control unit is in first control signal, first operating voltage and institute
Output conductivity control signal is to the protection location in the presence of stating the second operating voltage, and the protection location is according to the conducting
Control signal is turned on；
When the power supply disconnects with the load, described control unit output shut-off control under the 4th control signal effect
Signal processed to the protection location, the protection location disconnects according to the shut-off control signal.
3. power protecting circuit according to claim 2, it is characterised in that described control unit includes：
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity, the second electric capacity, first switch member
Part, second switch element and photoelectrical coupler；
The first end of the first resistor is the control end of described control unit, and the first end of the second resistance is the control
The first input end of unit, the second end of the first resistor is connected with the control end of the first switching element, and described second
Second end of resistance is connected with the first end of the photoelectrical coupler, the second end and the first switch of the photoelectrical coupler
The input connection of element, the output head grounding of the first switching element, the 3rd end of the photoelectrical coupler and described the
The first end of the input of two switch elements and second electric capacity connects the second input to form described control unit, institute altogether
The 4th end and the control end of the second switch element and the first end of the 3rd resistor for stating photoelectrical coupler connect altogether, institute
The second end for stating 3rd resistor is connected with the first end of the 4th resistance, the first end of the 4th resistance and the described first electricity
The first end of appearance and the first end of the 5th resistance connect the first output end to form described control unit, the 5th electricity altogether
Second end at the second end of resistance and the second end of first electric capacity and second electric capacity connects to form described control unit altogether
The second output end.
4. power protecting circuit according to claim 3, it is characterised in that the first switching element is the pole of NPN type three
Pipe, base stage, colelctor electrode and the emitter stage of the NPN type triode are respectively the control end of the first switching element, input
End and output end.
5. power protecting circuit according to claim 3, it is characterised in that the second switch element is the pole of NPN type three
Pipe, base stage, colelctor electrode and the emitter stage of the NPN type triode are respectively the control end of the second switch element, input
End and output end.
6. power protecting circuit according to claim 2, it is characterised in that the protection location includes the pole of controllable silicon two
Pipe；
The anode of the thyristor diode is the input of the protection location, and the negative electrode of the thyristor diode is described
The output end of protection location, the control end of the thyristor diode is the control end of the protection location.
7. power protecting circuit according to claim 1, it is characterised in that the power supply module includes：
Transformer, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the 3rd electric capacity,
Four electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the first electrochemical capacitor, the second electrochemical capacitor, the 6th resistance and the 7th
Resistance；
The first end of 3rd electric capacity connects the first input to form the power supply module with the negative electrode of first diode altogether
End, the anode of first diode is connected with the first end of the secondary windings of the transformer, the sun of second diode
Pole and the second end of the secondary windings of the anode of the 3rd diode, the first end of the 4th electric capacity and the transformer
Connect altogether, the negative electrode of second diode and the negative electrode of the 3rd diode, the first end of the 6th resistance, the described 5th
The first end of the first end of electric capacity, the first end of first electrochemical capacitor and the 7th resistance connects to form the power supply altogether
Second input of module, the second end of the 4th electric capacity is connected with the second end of the 6th resistance, the 5th electric capacity
The second end, the second end of the second end of first electrochemical capacitor and the 7th resistance be connected to equipotential end altogether, it is described
The first end of first armature winding of transformer is connected with the anode of the 4th diode, the negative electrode of the 4th diode with
The first end of second electrochemical capacitor connects the first output end to form the power supply module altogether, and the first of the transformer is primary
Second end of winding and the second end of second electrochemical capacitor are connected to ground, the first of the second armature winding of the transformer altogether
End is connected with the anode of the 5th diode, the negative electrode of the 5th diode and the first end of the 6th electric capacity and institute
The first end for stating the 7th electric capacity connects the second output end to form the power supply module altogether, the second armature winding of the transformer
Second end of the second end and the 6th electric capacity and the second end of the 7th electric capacity connect to form the of the power supply module altogether
Three output ends.
8. a kind of power supply, including surge restraint circuit, rectification circuit, accumulator and controller, it is characterised in that the electricity
Source also includes the power protecting circuit described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720118568.2U CN206452295U (en) | 2017-02-08 | 2017-02-08 | A kind of power protecting circuit and power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720118568.2U CN206452295U (en) | 2017-02-08 | 2017-02-08 | A kind of power protecting circuit and power supply |
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| Publication Number | Publication Date |
|---|---|
| CN206452295U true CN206452295U (en) | 2017-08-29 |
Family
ID=59664811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720118568.2U Active CN206452295U (en) | 2017-02-08 | 2017-02-08 | A kind of power protecting circuit and power supply |
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| CN (1) | CN206452295U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579654A (en) * | 2017-09-30 | 2018-01-12 | 广东威灵电机制造有限公司 | Motor power circuit and washing machine |
| CN109795429A (en) * | 2019-01-18 | 2019-05-24 | 北京理工大学 | A kind of Vehicle Controller power-supply system of discontinuous work |
| CN109936202A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN111446851A (en) * | 2020-04-22 | 2020-07-24 | 深圳华德电子有限公司 | Power input surge current suppression circuit with power factor correction module |
| CN112467996A (en) * | 2019-09-06 | 2021-03-09 | 群光电能科技股份有限公司 | High-low pressure compensation device |
-
2017
- 2017-02-08 CN CN201720118568.2U patent/CN206452295U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579654A (en) * | 2017-09-30 | 2018-01-12 | 广东威灵电机制造有限公司 | Motor power circuit and washing machine |
| CN109936202A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN109795429A (en) * | 2019-01-18 | 2019-05-24 | 北京理工大学 | A kind of Vehicle Controller power-supply system of discontinuous work |
| CN109795429B (en) * | 2019-01-18 | 2024-04-16 | 北京理工大学 | Discontinuous working vehicle-mounted controller power supply system |
| CN112467996A (en) * | 2019-09-06 | 2021-03-09 | 群光电能科技股份有限公司 | High-low pressure compensation device |
| CN111446851A (en) * | 2020-04-22 | 2020-07-24 | 深圳华德电子有限公司 | Power input surge current suppression circuit with power factor correction module |
| CN111446851B (en) * | 2020-04-22 | 2023-03-31 | 深圳华德电子有限公司 | Power input surge current suppression circuit with power factor correction module |
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