CN110212745A - Capacitor protection circuit - Google Patents
Capacitor protection circuit Download PDFInfo
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- CN110212745A CN110212745A CN201910478580.8A CN201910478580A CN110212745A CN 110212745 A CN110212745 A CN 110212745A CN 201910478580 A CN201910478580 A CN 201910478580A CN 110212745 A CN110212745 A CN 110212745A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 59
- 239000004065 semiconductor Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 description 11
- 230000005611 electricity Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- KLDZYURQCUYZBL-UHFFFAOYSA-N 2-[3-[(2-hydroxyphenyl)methylideneamino]propyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCN=CC1=CC=CC=C1O KLDZYURQCUYZBL-UHFFFAOYSA-N 0.000 description 1
- 102100035954 Choline transporter-like protein 2 Human genes 0.000 description 1
- 101000948115 Homo sapiens Choline transporter-like protein 2 Proteins 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000001098 delayed sleep phase syndrome Diseases 0.000 description 1
- 208000033921 delayed sleep phase type circadian rhythm sleep disease Diseases 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- -1 oxide (oxide) Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a capacitive protection circuit, comprising: the circuit comprises a buffer circuit, a control circuit and a discharge circuit; when the circuit is powered on, the control circuit controls power supply voltage to charge the capacitor through the buffer circuit; when the circuit is powered off, the control circuit controls the discharge circuit to be connected with the capacitor, so that the capacitor is discharged through the discharge circuit. According to the technical scheme provided by the invention, when the circuit is electrified, the charging of the power supply voltage to the capacitor is buffered through the buffer circuit, so that the electrified charging current can be better inhibited; when the circuit is powered off, the discharge circuit is connected to the two ends of the capacitor in parallel, so that the voltage of the capacitor is released through the discharge circuit, the safety of the circuit is effectively guaranteed, and the cost is reduced.
Description
Technical field
The present invention relates to a kind of protection circuit more particularly to a kind of capacitance protection circuits.
Background technique
Capacitor refers to that the charge reserves under given potential difference have as one of most common electronic component
Energy storage, filtering, decoupling the effects of.Especially some rectifier filter circuits and the variation of some load currents very greatly
In circuit, it is often necessary to which large bulk capacitance either multiple capacitors are used in parallel.
However the capacitance used in the circuit it is especially big when, in powered on moment, huge capacitance charging current can be generated,
Plug is caused to be struck sparks, phenomena such as air switch trips.When power-off, the energy that is stored in capacitor can not quick release, hold
It is also easy to produce danger.
Accordingly, it is desirable to provide a kind of capacitance protection circuit solves the deficiencies in the prior art.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides a kind of capacitance protection circuit, the drop when circuit powers on
Low large bulk capacitance charging current, and ensure that by the safety of circuit, reduce and be designed to for capacitor repid discharge when power-off
This.
The present invention provides a kind of capacitance protection circuits, comprising: buffer circuit, control circuit and discharge circuit；
The first end of the buffer circuit and the first terminal of power supply connect, and the first end of second end and the capacitor connects
It connects；
The first end of the control circuit is connect with the Second terminal of the power supply, and the of second end and the buffer circuit
The connection of three ends, third end is connect with the first end of the discharge circuit；
The second end of the discharge circuit is connect with the first end of the second end of buffer circuit and capacitor respectively, third end with
The second end of capacitor connects；
The first end of the capacitor is connect with external power supply terminal, second end ground connection；
When circuit powers on, the control circuit control supply voltage is the capacitor charging by the buffer circuit；
When the down circuitry, the control circuit controls the discharge circuit and the capacitance connection, makes the electricity
Appearance is discharged by the discharge circuit.
Further, the buffer circuit includes: resistance R1 and relay K1,
One end of the resistance R1 is connect with the first terminal of the power supply, and the first end of the other end and the capacitor connects
It connects；
The normally opened contact of the relay K1 is connect with the first terminal of the power supply, and the of fixed contact and the capacitor
One end connection, coil-end are connect with the second end of the control circuit.
Further, the buffer circuit further include: diode D1,
The diode D1 is connected in parallel on the both ends of the relay K1 coil, for protecting the relay K1；
The anode of the diode D1 is connect with the second end of the control circuit, and cathode and first switch power supply terminal connect
It connects.
Further, the control circuit includes: first switch device and second switch device,
The first end of the first switch device is connect with the first end of the capacitor, and second end is electric with the buffering respectively
The coil-end of the relay K1 on road is connected with first switch power supply terminal, third end ground connection；
The first end of the second switch device is connect with second switch power supply terminal, and second end and the discharge circuit connect
It connects, third end ground connection.
Further, the first switch device is triode or metal-oxide-semiconductor；The second switch device be triode or
Metal-oxide-semiconductor.
Further, the control circuit further include: resistance R3, resistance R4, resistance R5, resistance R6 and resistance R7,
One end of the resistance R3 is grounded, and the other end connects with one end of the resistance R4 and one end of the resistance R7 respectively
It connects；
The other end of the resistance R4 is connect with the first end of the capacitor；
The other end of the resistance R7 is connect with the first end of the first switch device；
One end of the resistance R6 is grounded, the other end respectively with the first end of the second switch device and the resistance R5
One end connection；
The other end of the resistance R5 is connect with the second switch power supply terminal.
Further, the control circuit further include: first singlechip, second singlechip, resistance R3, resistance R5, resistance
R6 and resistance R7,
One end of the resistance R3 is grounded, and the other end connects with one end of the resistance R7 and the first singlechip respectively
It connects；
The other end of the resistance R7 is connect with the first end of the first switch device；
One end of the resistance R6 is grounded, the other end respectively with the first end of the second switch device and the resistance R5
One end connection；
The other end of the resistance R5 is connect with the second singlechip.
Further, the control circuit further include: zener diode D3,
The plus earth of the zener diode D3, cathode are connect with one end of the resistance R7, for protecting described
One switching device.
Further, the discharge circuit includes: resistance R2 and relay K2,
One end of the resistance R2 is connect with the first end of the capacitor, the normally-closed contact of the other end and the relay K2
Connection；
The fixed contact of the relay K2 is grounded, and coil-end is connect with the third end of the control circuit.
Further, the discharge circuit further include: diode D2,
The diode D2 is connected in parallel on the both ends of the relay K2 coil, for protecting the relay K2；
The anode of the diode D1 is connect with the third end of the control circuit, and cathode and second switch power supply terminal connect
It connects.
Technical solution provided by the invention has the advantages that compared with the immediate prior art
Buffer circuit is arranged in technical solution provided by the invention between capacitor and power supply, the parallel discharge electricity at capacitor both ends
Road, and buffer circuit and discharge circuit are controlled by control circuit.Technical solution provided by the invention passes through when circuit powers on
Buffer circuit carrys out charging of the buffered sources voltage to capacitor, can preferably inhibit the charging current powered on；In down circuitry, lead to
It crosses and discharge circuit is parallel to capacitor both ends, so that capacitance voltage is discharged by discharge circuit, be effectively guaranteed the peace of circuit
Entirely, it reduces costs.
Detailed description of the invention
Fig. 1 is a kind of block diagram of capacitance protection circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of capacitance protection circuit provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of another capacitance protection circuit provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of another capacitance protection circuit provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the capacitance protection circuit includes: buffer circuit, control the present invention provides a kind of capacitance protection circuit
Circuit and discharge circuit processed.
The first end of the buffer circuit and the first terminal of power supply connect, and the first end of second end and capacitor connects；
The first end of the control circuit and the Second terminal of power supply connect, and second end is connect with the third end of Korea Spro's charging record,
The connection of the first end of third end and discharge circuit；
The second end of the discharge circuit is connect with the first end of the second end of buffer circuit and capacitor respectively, third end and electricity
The second end of appearance connects；
The first end of capacitor is connect with external power supply terminal, second end ground connection.
When circuit powers on, it is capacitor charging that control circuit, which controls supply voltage by buffer circuit,.
When down circuitry, control circuit controls discharge circuit and capacitance connection, so that capacitor is discharged by discharge circuit.
In the embodiment of the present application, buffer circuit is connected in series to the capacitor, and be set between power supply and capacitor, on circuit
When electric, so that electric current first passes through the buffering of buffer circuit, then it is capacitor charging, slowly increase capacitor both end voltage, avoid
The moment powered on generates huge charging current, protects capacitor.Discharge circuit is in parallel with capacitor, and it is set to power supply and capacitor
Between, in down circuitry, capacitor is discharged by discharge circuit, and the energy quick release that will be stored in capacitor avoids sending out
It is raw dangerous.Control circuit is connect with buffer circuit and discharge circuit respectively, and controls buffer circuit and whether discharge circuit accesses
In circuit.By control circuit, buffer circuit and the discharge circuit being set in circuit, it is effectively guaranteed the safety of circuit,
The safety of capacitor is protected, and is reduced costs.
In some embodiments of the application, as shown in Fig. 2, buffer circuit includes: resistance R1 and relay K1.
One end of the resistance R1 is connect with the first terminal of the power supply, and the first end of the other end and the capacitor connects
It connects；
The normally opened contact of the relay K1 is connect with the first terminal of the power supply, and the of fixed contact and the capacitor
One end connection, coil-end are connect with the second end of the control circuit.
In some embodiments of the application, as shown in Fig. 2, buffer circuit further include: diode D1.
The diode D1 is connected in parallel on the both ends of the relay K1 coil, for protecting the relay K1；
The anode of the diode D1 is connect with the second end of the control circuit, and cathode and first switch power supply terminal connect
It connects.
In some embodiments of the application, control circuit includes: first switch device and second switch device.
The first end of the first switch device is connect with the first end of the capacitor, and second end is electric with the buffering respectively
The coil-end of the relay K1 on road is connected with first switch power supply terminal, third end ground connection；
The first end of the second switch device is connect with second switch power supply terminal, and second end and the discharge circuit connect
It connects, third end ground connection.
In some embodiments of the application, first switch device is triode or metal-oxide-semiconductor；Second switch device is triode
Or metal-oxide-semiconductor.
For example, first switch device and second switch device are triode in Fig. 2.In Fig. 3, first switch device
Part and second switch device are N-channel type metal-oxide-semiconductor.In other embodiments, first switch device and second switch device can also
To be other devices with switching characteristic.
Wherein, triode should be transistor, also referred to as bipolar junction transistor, transistor, be a kind of control electricity
The semiconductor devices of stream.Metal-oxide-semiconductor plays the role of switch in capacitance protection circuit provided by the present application.
Metal-oxide-semiconductor is metal (metal), oxide (oxide), semiconductor (semiconductor) field effect transistor, tool
Have the advantages that input impedance is high, noise is low, thermal stability is good, metal-oxide-semiconductor plays out in capacitance protection circuit provided by the present application
The effect of pass.
In some embodiments of the application, as shown in Fig. 2, control circuit further include: resistance R3, resistance R4, resistance R5, electricity
Hinder R6 and resistance R7.
One end of the resistance R3 is grounded, and the other end connects with one end of the resistance R4 and one end of the resistance R7 respectively
It connects；
The other end of the resistance R4 is connect with the first end of the capacitor；
The other end of the resistance R7 is connect with the first end of the first switch device；
One end of the resistance R6 is grounded, the other end respectively with the first end of the second switch device and the resistance R5
One end connection；
The other end of the resistance R5 is connect with the second switch power supply terminal.
In some embodiments of the application, as shown in figure 4, control circuit further include: first singlechip, second singlechip,
Resistance R3, resistance R5, resistance R6 and resistance R7,
One end of the resistance R3 is grounded, and the other end connects with one end of the resistance R7 and the first singlechip respectively
It connects；
The other end of the resistance R7 is connect with the first end of the first switch device；
One end of the resistance R6 is grounded, the other end respectively with the first end of the second switch device and the resistance R5
One end connection；
The other end of the resistance R5 is connect with the second singlechip.
In some embodiments of the application, control circuit further include: zener diode D3.
The plus earth of the zener diode D3, cathode are connect with one end of the resistance R7, for protecting described
One switching device.
In some embodiments of the application, as shown in Fig. 2, discharge circuit includes: resistance R2 and relay K2.
One end of the resistance R2 is connect with the first end of the capacitor, the normally-closed contact of the other end and the relay K2
Connection；
The fixed contact of the relay K2 is grounded, and coil-end is connect with the third end of the control circuit.
In some embodiments of the application, as shown in Fig. 2, discharge circuit further include: diode D2.
The diode D2 is connected in parallel on the both ends of the relay K2 coil, for protecting the relay K2；
The anode of the diode D1 is connect with the third end of the control circuit, and cathode and second switch power supply terminal connect
It connects.
Fig. 2 is a kind of schematic diagram of capacitance protection circuit provided by the embodiments of the present application.The capacitance protection circuit include after
Electric appliance K1, relay K2, resistance R1, R2, transistor Q1, Q2, diode D1, D2, zener diode D3, resistance R3, R4, R5,
R6, R7 and large bulk capacitance C1, C2, C3, the electric connecting relation of these components are as shown in Figure 2.
Wherein, relay K1 is normally opened relay, and relay K2 is normally closed relay, and resistance R1 and resistance R2 are power electricity
Resistance.
First switch power supply and second switch power supply are 24V.
In the possible embodiment of the application, in the moment that circuit powers on, input voltage is given by resistance R1
Large bulk capacitance C1, C2, C3 of rear class charge, and slowly increase capacitor both end voltage.Being acted on by the partial pressure of resistance R3, R4 will
The voltage at the both ends large bulk capacitance C1, C2, C3 is loaded into the base stage of triode Q1 by R7, and voltage after partial pressure reaches three poles
When the conducting voltage of pipe, triode Q1 conducting, relay K1 is acted and being switched actuation is short-circuited resistance R1.Pass through setting
The size of resistance R3, R4 obtain different branch pressure voltage values, so that the time for controlling R1 access circuit filling for limiting capacitance
Electric current.When powering on, it is applied directly to the base stage of triode Q2 after the partial pressure that the 24V voltage of second switch power supply passes through R5, R6, makes
Triode Q2 fast conducting avoids more so that relay K2 is acted and disconnected power resistor R2 from the both ends capacitor C1, C2, C3
Remaining power consumption.
In the possible embodiment of the application, in the moment of down circuitry, 24V voltage in circuit by after
Coil discharge in electric appliance K1, K2, so that 24V voltage rapid decrease；When dropping to certain value, relay K2 movement will be electric
Resistance R2 is parallel to the both ends large bulk capacitance C1, C2, C3, falls large bulk capacitance by R2 quick release；Relay K1 simultaneously
It can act, resistance R1 is connected in series in circuit again.
In the possible embodiment of the application, diode D1, D2 in circuit are relay K1, K2 respectively
Freewheeling diode plays the role of inhibition due to voltage spikes, protective relay.D3 is zener diode, is that direct current is female in order to prevent
Voltage fluctuation on line is excessive to cause triode Q1 to damage.D1, D2, D3 can be selected according to actual needs and type selecting, Ke Yixuan
Having selected, which also can choose, does not have, or including wherein any several.24V voltage can be provided separately, and can also use it
His suitable voltage value, such as 12V.The quantity of large bulk capacitance C1, C2, C3 can increase and decrease according to actual needs, can be used
One large bulk capacitance or more large bulk capacitances in parallel, are also possible to by capacitor and series-parallel group of other electronic components
At.
In the other possible embodiment of the application, triode can be replaced with metal-oxide-semiconductor, as shown in figure 3, can also
To be replaced with other devices with switching characteristic.
In the other possible embodiment of the application, the conducting of first switch device and second switch device is controlled
And closing, it can be through voltage and control, as shown in figure 4, being also possible to through single-chip microcontroller (MCU_CTL1, MCU_ in such as figure
CTL2) or other chips control.
The single-chip microcontroller or other chips that the application mentions, can be used the common model of those skilled in the art, this
Place repeats no more.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.
It is understood that embodiments described herein can with hardware, software, firmware, middleware, microcode or its
Combination is to realize.For hardware realization, processing unit be may be implemented in one or more specific integrated circuit (Application
Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing,
DSP), digital signal processing appts (DSP Device, DSPD), programmable logic device (Programmable Logic
Device, PLD), field programmable gate array (Field-Programmable Gate Array, FPGA), general processor,
In controller, microcontroller, microprocessor, other electronic units for executing herein described function or combinations thereof.
For software implementations, the techniques described herein can be realized by executing the unit of function described herein.Software generation
Code is storable in memory and is executed by processor.Memory can in the processor or portion realizes outside the processor.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided herein, it should be understood that disclosed device and method can pass through others
Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of device or unit
It connects, can be electrical property, mechanical or other forms.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the embodiment of the present invention is substantially
The part of the part that contributes to existing technology or the technical solution can embody in the form of software products in other words
Come, which is stored in a storage medium, including some instructions are used so that a computer equipment (can
To be personal computer, server or the network equipment etc.) execute all or part of each embodiment the method for the present invention
Step.And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk etc. are various can store program
The medium of code.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of capacitance protection circuit characterized by comprising buffer circuit, control circuit and discharge circuit；
The first end of the buffer circuit and the first terminal of power supply connect, and second end is connect with the first end of the capacitor；
The first end of the control circuit is connect with the Second terminal of the power supply, the third end of second end and the buffer circuit
Connection, third end is connect with the first end of the discharge circuit；
The second end of the discharge circuit is connect with the first end of the second end of buffer circuit and capacitor respectively, third end and capacitor
Second end connection；
The first end of the capacitor is connect with external power supply terminal, second end ground connection；
When circuit powers on, the control circuit control supply voltage is the capacitor charging by the buffer circuit；
When the down circuitry, the control circuit controls the discharge circuit and the capacitance connection, keeps the capacitor logical
Cross the discharge circuit electric discharge.
2. a kind of capacitance protection circuit according to claim 1, which is characterized in that the buffer circuit includes: resistance R1
With relay K1,
One end of the resistance R1 is connect with the first terminal of the power supply, and the other end is connect with the first end of the capacitor；
The normally opened contact of the relay K1 is connect with the first terminal of the power supply, the first end of fixed contact and the capacitor
Connection, coil-end are connect with the second end of the control circuit.
3. a kind of capacitance protection circuit according to claim 2, which is characterized in that the buffer circuit further include: two poles
Pipe D1,
The diode D1 is connected in parallel on the both ends of the relay K1 coil, for protecting the relay K1；
The anode of the diode D1 is connect with the second end of the control circuit, and cathode is connect with first switch power supply terminal.
4. a kind of capacitance protection circuit according to claim 1, which is characterized in that the control circuit includes: first to open
Device and second switch device are closed,
The first end of the first switch device is connect with the first end of the capacitor, second end respectively with the buffer circuit
The coil-end of relay K1 is connected with first switch power supply terminal, third end ground connection；
The first end of the second switch device is connect with second switch power supply terminal, and second end is connect with the discharge circuit,
Third end ground connection.
5. a kind of capacitance protection circuit according to claim 4, which is characterized in that the first switch device is triode
Or metal-oxide-semiconductor；The second switch device is triode or metal-oxide-semiconductor.
6. a kind of capacitance protection circuit according to claim 4, which is characterized in that the control circuit further include: resistance
R3, resistance R4, resistance R5, resistance R6 and resistance R7,
One end of the resistance R3 is grounded, and the other end is connect with one end of one end of the resistance R4 and the resistance R7 respectively；
The other end of the resistance R4 is connect with the first end of the capacitor；
The other end of the resistance R7 is connect with the first end of the first switch device；
One end of the resistance R6 is grounded, the other end respectively with the first end of the second switch device and the resistance R5 one
End connection；
The other end of the resistance R5 is connect with the second switch power supply terminal.
7. a kind of capacitance protection circuit according to claim 4, which is characterized in that the control circuit further include: first
Single-chip microcontroller, second singlechip, resistance R3, resistance R5, resistance R6 and resistance R7,
One end of the resistance R3 is grounded, and the other end is connect with one end of the resistance R7 and the first singlechip respectively；
The other end of the resistance R7 is connect with the first end of the first switch device；
One end of the resistance R6 is grounded, the other end respectively with the first end of the second switch device and the resistance R5 one
End connection；
The other end of the resistance R5 is connect with the second singlechip.
8. a kind of capacitance protection circuit according to claim 6 or 7, which is characterized in that the control circuit further include: steady
Diode D3 is pressed,
The plus earth of the zener diode D3, cathode are connect with one end of the resistance R7, for protecting described first to open
Close device.
9. a kind of capacitance protection circuit according to claim 1, which is characterized in that the discharge circuit includes: resistance R2
With relay K2,
One end of the resistance R2 is connect with the first end of the capacitor, and the normally-closed contact of the other end and the relay K2 connect
It connects；
The fixed contact of the relay K2 is grounded, and coil-end is connect with the third end of the control circuit.
10. a kind of capacitance protection circuit according to claim 9, which is characterized in that the discharge circuit further include: two poles
Pipe D2,
The diode D2 is connected in parallel on the both ends of the relay K2 coil, for protecting the relay K2；
The anode of the diode D1 is connect with the third end of the control circuit, and cathode is connect with second switch power supply terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910478580.8A CN110212745A (en) | 2019-06-03 | 2019-06-03 | Capacitor protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910478580.8A CN110212745A (en) | 2019-06-03 | 2019-06-03 | Capacitor protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110212745A true CN110212745A (en) | 2019-09-06 |
Family
ID=67790473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910478580.8A Pending CN110212745A (en) | 2019-06-03 | 2019-06-03 | Capacitor protection circuit |
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| Country | Link |
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| CN (1) | CN110212745A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737360A (en) * | 2020-12-29 | 2021-04-30 | 上海骄成机电设备有限公司 | Rectifying circuit and power supply |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10243555A (en) * | 1997-02-21 | 1998-09-11 | Oki Electric Ind Co Ltd | Inrush current limiting circuit |
| CN103444067A (en) * | 2011-04-25 | 2013-12-11 | 爱信艾达株式会社 | Discharge control circuit |
| CN203788136U (en) * | 2014-01-15 | 2014-08-20 | 山东和顺电气有限公司 | Maglev train chopper circuit having functions of energy saving and cooling |
| CN206379877U (en) * | 2016-12-20 | 2017-08-04 | 桐昆集团股份有限公司 | Frequency converter voltage shock avoiding circuit |
| CN107659134A (en) * | 2017-07-03 | 2018-02-02 | 哈尔滨工大特种机器人有限公司 | The electric power controller and its control method of a kind of light-duty mechanical arm |
| CN209860794U (en) * | 2019-06-03 | 2019-12-27 | 珠海格力电器股份有限公司 | Capacitor protection circuit |
-
2019
- 2019-06-03 CN CN201910478580.8A patent/CN110212745A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10243555A (en) * | 1997-02-21 | 1998-09-11 | Oki Electric Ind Co Ltd | Inrush current limiting circuit |
| CN103444067A (en) * | 2011-04-25 | 2013-12-11 | 爱信艾达株式会社 | Discharge control circuit |
| CN203788136U (en) * | 2014-01-15 | 2014-08-20 | 山东和顺电气有限公司 | Maglev train chopper circuit having functions of energy saving and cooling |
| CN206379877U (en) * | 2016-12-20 | 2017-08-04 | 桐昆集团股份有限公司 | Frequency converter voltage shock avoiding circuit |
| CN107659134A (en) * | 2017-07-03 | 2018-02-02 | 哈尔滨工大特种机器人有限公司 | The electric power controller and its control method of a kind of light-duty mechanical arm |
| CN209860794U (en) * | 2019-06-03 | 2019-12-27 | 珠海格力电器股份有限公司 | Capacitor protection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737360A (en) * | 2020-12-29 | 2021-04-30 | 上海骄成机电设备有限公司 | Rectifying circuit and power supply |
| CN112737360B (en) * | 2020-12-29 | 2022-07-05 | 上海骄成超声波技术股份有限公司 | Rectifying circuit and power supply |
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