CN110086162A - Anti-reverse connection circuit of direct current power supply with self-test interlocking anti-interference function - Google Patents
Anti-reverse connection circuit of direct current power supply with self-test interlocking anti-interference function Download PDFInfo
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- CN110086162A CN110086162A CN201910521988.9A CN201910521988A CN110086162A CN 110086162 A CN110086162 A CN 110086162A CN 201910521988 A CN201910521988 A CN 201910521988A CN 110086162 A CN110086162 A CN 110086162A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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Abstract
The present invention provides a kind of anti-reverse connection circuit of direct current power supply with self-test interlocking anti-interference function.The circuit is when DC power supply is reversely connected, first partial pressure unit and the second partial pressure unit both ends do not have potential difference, all without voltage signal on first partial pressure end and the second partial pressure end, controllable switch unit can not be connected, the positive input signal loaded on DC output end can not access in circuit loop, and the load accessed in circuit can not work；When DC power supply just connects, as long as the voltage signal at the first partial pressure end divided from direct-flow input end, the voltage signal at the second partial pressure end divided with the output end from Switching Power Supply, the cut-in voltage that any of the two voltage signals can reach controllable switch unit can be realized as the conducting of controllable switch unit.Through the invention, it solves the problems, such as that reliability due to voltage fluctuation of the anti-reverse connection circuit of direct current power supply based on controllable switch unit is low, improves the reliability of anti-reverse connection circuit of direct current power supply.
Description
Technical field
The present invention relates to field of power supplies, in particular to a kind of DC power supply with self-test interlocking anti-interference function
Reverse-connection preventing circuit.
Background technique
With the demand sustainable growth of DC electric apparatus product, the air conditioning appliance product based on DC power supply is also gradually innovated
Exploitation.But for alternating current input power supplying, direct current belongs to the polarity that power supply has to differentiate between input power, to prevent from inputting
Error-polarity connection of power supply causes air-conditioner controller to burn or even burst.
In view of the above-mentioned problems, generally using following solution in the related technology:
Fig. 1 is the anti-reverse connection circuit of direct current power supply based on diode, which is by common two pole of unipolarity
Pipe, circuit counnter attack is realized by the one-way conduction characteristic of diode.This cut-in method is simple and reliable, but input current compared with
When big, the loss of diode is big, and fever is serious, and there are the low problems of power supply conversion efficiency.
Fig. 2 is the anti-reverse connection circuit of direct current power supply based on rectifier bridge, which is by increasing a rectification in input terminal
Bridge device, the same one-way conduction characteristic for passing through diode, circuit counnter attack is realized by bridge rectifier.No matter input terminal
Power supply is accessed, circuit can work normally.But it is whole since load current requires to be formed into a loop by two diodes every time
The power consumption of stream bridge-type counnter attack protection circuit will be twice of diode cast reverse connection prevention protection circuit, equally exists low efficiency and asks
Topic.
Inventor studies discovery: in above-mentioned reverse-connection preventing circuit, in the case where source current is certain, and power supply conversion effect
Rate is related with the conduction impedance of diode；The more big then power supply conversion efficiency of conduction impedance is lower.And insulating gate type field effect tube
(MOS) conduction impedance is smaller than diode, therefore, if substituting diode using insulating gate type field effect tube, it is possible to improve
Power supply conversion efficiency.When in reverse-connection preventing circuit using insulating gate type field effect tube or other controllable switch units, in electricity
Source generates a cut-in voltage conducting controllable switch unit in the case where just connecing, unlatching can not be generated in the case where reverse power connection
Voltage and the mode for turning off controllable switch unit, can substitute diode and play the role of preventing reverse connection for DC power source.However, after
Find in continuous research process: in actual DC grid, there are voltage fluctuations for the DC output voltage of DC grid, especially exist
When voltage fluctuation is to lower voltage grade, cut-in voltage is not achieved in the control terminal that may cause controllable switch unit, and causing can
The abnormal shutdown of switch unit is controlled, and then influences the work of load equipment.
Summary of the invention
The present invention provides a kind of anti-reverse connection circuit of direct current power supply with self-test interlocking anti-interference function, at least to solve
In the related technology based on the anti-reverse connection circuit of direct current power supply of controllable switch unit due to voltage fluctuation the low problem of reliability.
The embodiment of the invention provides a kind of anti-reverse connection circuit of direct current power supply, comprising: direct-flow input end, DC output end,
Controllable switch unit, the first partial pressure unit, isolated location, Switching Power Supply and the second partial pressure unit, wherein the first partial pressure unit connects
It connects between direct-flow input end and common end, and draws the first partial pressure end；The input terminal of Switching Power Supply is connect with direct-flow input end；
Second partial pressure unit is connected between the output end of Switching Power Supply and common end, and draws the second partial pressure end；Controllable switch unit
Control terminal and first point of press bond, the first switch end of controllable switch unit connect with DC output end, controllable switch list
The second switch end of member is connect with common end；One end of isolated location and the control terminal of controllable switch unit connect, isolated location
The other end and second point of press bond, isolated location be used for be isolated first partial pressure end and second divide end on voltage signal.
Optionally, Switching Power Supply is used to be converted to the DC input voitage of direct-flow input end the electricity of predetermined voltage class
Pressure, and realize voltage stabilizing function.
Optionally, the first partial pressure unit includes: first resistor R1, second resistance R2, wherein one end of first resistor R1 connects
Direct-flow input end is connect, the other end of first resistor R1 is first point of press bond；One end of second resistance R2 and the first partial pressure end
Connection, the other end of second resistance R2 are connect with common end.
Optionally, circuit further include: one end of 3rd resistor R3,3rd resistor R3 and the control terminal of controllable switch unit connect
It connects, the other end of 3rd resistor R3 and first point of press bond.
Optionally, the first partial pressure unit further include: first capacitor C1, one end of first capacitor C1 connect with the first partial pressure end
It connects, the other end of first capacitor C1 is connect with common end.
Optionally, the first partial pressure unit further include: zener diode D1, the cathode of zener diode D1 and the first partial pressure end
The anode of connection, zener diode D1 is connect with common end.
Optionally, isolated location includes: diode D2, and the cathode of diode D2 and the control terminal of controllable switch unit connect
It connects, anode and the second point of press bond of diode D2.
Optionally, circuit further include: the 4th resistance R4 and the second capacitor C2, wherein one end of the 4th resistance R4 and controllable
The first switch end of switch unit connects, and the other end of the 4th resistance R4 is connect with a pole plate of the second capacitor C2, the second electricity
The second switch end of another pole plate and controllable switch unit for holding C2 connects.
Optionally, controllable switch unit is insulating gate type field effect tube Q1, wherein the control terminal of controllable switch unit is exhausted
The grid of edge grid-type field-effect tube Q1, the first switch end of controllable switch unit are the source electrode of insulating gate type field effect tube Q1, can
The second switch end for controlling switch unit is the drain electrode of insulating gate type field effect tube Q1.
Optionally, the second partial pressure unit includes: the 5th resistance R5, triode Q2, the 6th resistance R6, wherein the 5th resistance
One end of R5 is connect with the emitter of triode Q2, and the other end of the 5th resistance R5 is connect with common end；The one of 6th resistance R6
End is connect with the output end of Switching Power Supply, and the other end of the 6th resistance R6 is connect with the base stage of triode Q2；The collection of triode Q2
Electrode and the output end of Switching Power Supply connect；The transmitting of triode Q2 extremely second divides end.
Optionally, the second partial pressure unit includes: the 5th resistance R5, triode Q2, control chip, wherein the 5th resistance R5
One end connect with the emitter of triode Q2, the other end of the 5th resistance R5 is connect with common end；Chip is controlled by switch electricity
Source power supply, the control terminal for controlling chip are connect with the base stage of triode Q2；The collector of triode Q2 and the output of Switching Power Supply
End connection；The transmitting of triode Q2 extremely second divides end.
Optionally, the second partial pressure unit a further include: pole plate of third capacitor C3, third capacitor C3 and common end connect
It connects, another pole plate of third capacitor is connect with the emitter of triode Q2.
The anti-reverse connection circuit of direct current power supply with self-test interlocking anti-interference function provided through the embodiment of the present invention, passes through
The circuit, in DC power supply reversal connection, because DC output end is equal with the potential of common end, the first partial pressure unit and the second partial pressure
Unit both ends do not have potential difference, and the first partial pressure end and second divide on end all without voltage signal, and controllable switch unit can not be led
Logical, the positive input signal loaded on DC output end can not access in circuit loop, and the load accessed in circuit can not work
Make；When DC power supply just connects, if the voltage signal at the first partial pressure end divided from direct-flow input end, and it is electric from switch
The voltage signal at the second partial pressure end that the output end in source divides, any of the two voltage signals, which can reach, controllably to be opened
The cut-in voltage for closing unit can be realized as the conducting of controllable switch unit.Solves the DC power supply based on controllable switch unit
Reverse-connection preventing circuit low problem of reliability due to voltage fluctuation, improves the reliability of anti-reverse connection circuit of direct current power supply.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the topology diagram according to the anti-reverse connection circuit of direct current power supply based on diode of the relevant technologies；
Fig. 2 is the topology diagram according to the anti-reverse connection circuit of direct current power supply based on rectifier bridge of the relevant technologies；
Fig. 3 is opening up for the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function
Flutter structure chart；
Fig. 4 is the excellent of the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function
Select topology diagram one；
Fig. 5 is the excellent of the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function
Select topology diagram two；
Fig. 6 is the work of the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function
Make flow chart.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that described herein, the specific embodiments are only for explaining the present invention, is not intended to limit the present invention.For ability
For field technique personnel, the present invention can be implemented in the case where not needing some details in these details.It is right below
The description of embodiment is used for the purpose of better understanding the present invention to provide by showing example of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
A kind of anti-reverse connection circuit of direct current power supply with self-test interlocking anti-interference function, Fig. 3 are provided in the present embodiment
It is the topology diagram of the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function, such as
Shown in Fig. 3, which includes: direct-flow input end 10, DC output end 20, controllable switch unit 30,
One partial pressure unit 40, isolated location 50, Switching Power Supply 60 and the second partial pressure unit 70, wherein the first partial pressure unit 40 is connected to
Between direct-flow input end 10 and common end, and draw the first partial pressure end；The input terminal and direct-flow input end 10 of Switching Power Supply 60 connect
It connects；Second partial pressure unit 70 is connected between the output end and common end of Switching Power Supply 60, and draws the second partial pressure end；Controllably open
The control terminal and first point of press bond of unit 30 are closed, the first switch end of controllable switch unit 30 and DC output end 20 connect
It connects, the second switch end of controllable switch unit 30 is connect with common end；One end of isolated location 50 and controllable switch unit 30
Control terminal connection, the other end of isolated location 50 and second point of press bond, isolated location 50 for be isolated the first partial pressure end with
Voltage signal on second partial pressure end.
By foregoing circuit, in DC power supply reversal connection, because DC output end is equal with the potential of common end, the first partial pressure
Unit and the second partial pressure unit both ends do not have potential difference, and the first partial pressure end and second divide on end all without voltage signal, controllably
Switch unit can not be connected, and the positive input signal loaded on DC output end can not access in circuit loop, connect in circuit
The load entered can not work；When DC power supply just connects, as long as the voltage at the first partial pressure end divided from direct-flow input end
Signal, and the voltage signal at the second partial pressure end that output end from Switching Power Supply divides, it is any in the two voltage signals
A cut-in voltage that can reach controllable switch unit can be realized as the conducting of controllable switch unit.It solves and is based on controllably opening
The anti-reverse connection circuit of direct current power supply of pass unit low problem of reliability due to voltage fluctuation, improves anti-reverse connection circuit of direct current power supply
Reliability.
It should be noted that according to circuit topological structure figure provided in this embodiment, in conjunction with anti-reverse connection circuit of direct current power supply
Concrete application scene, with general circuit design theoretical knowledge, so that it may determine the tool of each component in the present embodiment
Body type selecting and parameter, therefore the specific type selecting and parameter of each component are no longer enumerated in the present embodiment.
Optionally, Switching Power Supply 60 is used to the DC input voitage of direct-flow input end 10 being converted to predetermined voltage class
Voltage, and realize voltage stabilizing function.Switching Power Supply 60 with voltage stabilizing function can guarantee the steady of voltage signal on the second partial pressure end
It is fixed, further increase the reliability of the anti-reverse connection circuit of direct current power supply of the present embodiment.
Fig. 4 is the excellent of the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function
Select topology diagram.It is described and illustrates below in conjunction with anti-reverse connection circuit of direct current power supply of the Fig. 4 to the present embodiment.
Optionally, partial pressure unit is by the way of multiple electric resistance partial pressures, such as the first partial pressure unit 40 includes: first resistor
R1, second resistance R2, wherein one end of first resistor R1 connects direct-flow input end 10, and the other end of first resistor R1 is first
Divide press bond；One end of second resistance R2 and first point of press bond, the other end of second resistance R2 are connect with common end.
Optionally, circuit further include: one end of 3rd resistor R3,3rd resistor R3 and the control terminal of controllable switch unit 30
Connection, the other end of 3rd resistor R3 and first point of press bond.3rd resistor R3 is controllable for limiting the first partial pressure end flow direction
The electric current of the control terminal of switch unit.
Optionally, the first partial pressure unit 40 further include: first capacitor C1, one end of first capacitor C1 connect with the first partial pressure end
It connects, the other end of first capacitor C1 is connect with common end.First capacitor C1 is for filtering.
Optionally, the first partial pressure unit 40 further include: zener diode D1, the cathode of zener diode D1 and the first partial pressure
The anode of end connection, zener diode D1 is connect with common end.Zener diode D1 is for stablizing the both ends second resistance R2
Voltage, the voltage at the both ends second resistance R2 are the voltage at the first partial pressure end.
Optionally, isolated location 50 includes: diode D2, the cathode of diode D2 and the control terminal of controllable switch unit 30
Connection, anode and the second point of press bond of diode D2.
Optionally, circuit further include: the 4th resistance R4 and the second capacitor C2, wherein one end of the 4th resistance R4 and controllable
The first switch end of switch unit 30 connects, and the other end of the 4th resistance R4 is connect with a pole plate of the second capacitor C2, and second
Another pole plate of capacitor C2 is connect with the second switch end of controllable switch unit 30.4th resistance R4 and the second capacitor C2 is constituted
Soft starting circuit；Second capacitor C2 also acts as the effect of filtering.
Controllable switch unit 30 includes but is not limited to: triode, insulating gate type field effect tube, relay etc..In this implementation
In example, in order to reduce loss of the controllable switch unit 30 to power supply, optionally, controllable switch unit 30 is insulated-gate type field effect
Pipe Q1, wherein the control terminal of controllable switch unit 30 is the grid of insulating gate type field effect tube Q1, the of controllable switch unit 30
One switch terminals are the source electrode of insulating gate type field effect tube Q1, and the second switch end of controllable switch unit 30 is insulated-gate type field effect
The drain electrode of pipe Q1.
With reference to Fig. 5, the second partial pressure unit can also be by the way of multiple electric resistance partial pressures.Due to the output electricity of Switching Power Supply
It presses more stable, therefore using one there is the triode of fixed conduction voltage drop can ensure the second partial pressure to substitute divider resistance
The voltage class of the voltage signal at end keeps stablizing.For this purpose, in the present embodiment, the second partial pressure unit 70 includes: the 5th resistance
R5, triode Q2, the 6th resistance R6, wherein one end of the 5th resistance R5 is connect with the emitter of triode Q2, the 5th resistance R5
The other end connect with common end；One end of 6th resistance R6 is connect with the output end of Switching Power Supply 60, and the 6th resistance R6's is another
One end is connect with the base stage of triode Q2；The collector of triode Q2 is connect with the output end of Switching Power Supply 60；Triode Q2's
The extremely second partial pressure of transmitting end.
With reference to Fig. 4, the base voltage signal of triode Q2 can also directly be generated by control chip, and the control chip is preferred
The MCU of equipment where reverse-connection preventing circuit.Optionally, the second partial pressure unit 70 includes: the 5th resistance R5, triode Q2, control
Chip MCU, wherein one end of the 5th resistance R5 is connect with the emitter of triode Q2, the other end of the 5th resistance R5 with it is public
End connection；Control chip MCU is powered by Switching Power Supply 60, and the control terminal of control chip MCU is connect with the base stage of triode Q2；Three
The collector of pole pipe Q2 is connect with the output end of Switching Power Supply 60；The transmitting of triode Q2 extremely second divides end.
Optionally, the second partial pressure unit 70 a further include: pole plate of third capacitor C3, third capacitor C3 and common end connect
It connects, another pole plate of third capacitor is connect with the emitter of triode Q2.Third capacitor C3 is for filtering.
Fig. 6 is the work of the anti-reverse connection circuit of direct current power supply according to an embodiment of the present invention with self-test interlocking anti-interference function
Make flow chart, is illustrated below in conjunction with the course of work of the Fig. 4 and Fig. 6 to the present embodiment.
In anti-reverse connection circuit of direct current power supply shown in Fig. 4:
If not increasing the interlocking signal generated by MCU, there is larger fluctuation in input supply voltage, but does not influence VCC electricity
In the case that pressure is stablized, Q1 conducting situation will receive the influence of input supply voltage fluctuation.In input voltage fluctuation to lower limit value,
So that R1 resistance and R2 resistance is passed through electric resistance partial pressure, metal-oxide-semiconductor Q1 grid voltage is obtained on R2 less than cut-in voltage, Q1 will be extremely disconnected
It opens, circuit power is cut off, and influences to work normally.
If increasing the interlocking signal generated by MCU, there is larger fluctuation in input supply voltage, but do not influence VCC voltage
In the case where stabilization, Q1 conducting situation not will receive the influence of input supply voltage fluctuation.In input voltage fluctuation to lower limit value,
Even if obtaining metal-oxide-semiconductor Q1 grid voltage on R2 less than cut-in voltage, but MCU can produce under stabilized power supply VCC condition of power supply
Signal is controlled, makes the conducting of Q2, voltage close to VCC will be generated after Q2 conducting on R5 resistance, interlocking signal is high level at this time.
Interlocking signal controls the grid voltage of Q1 after D2, and Q1 is made to obtain cut-in voltage again, maintains Q1 conducting.Q1 conducting, circuit
Power supply normal power supply does not influence to work normally.
Therefore, Q1 when anti-reverse connection circuit of direct current power supply provided in this embodiment can prevent external power supply from being interfered by surge
It malfunctions and turns off.
It is resistance device with reference to Fig. 4, R1~R5；C1~C3 is capacitor element；D1 zener diode；D2 is two pole of switch
Pipe；Q1 is metal-oxide-semiconductor (G: grid, S: source electrode, D: drain electrode)；Q2 is triode；VCC is decompression transformation of the Vout Jing Guo Switching Power Supply
The stabilized power supply converted with linear voltage stabilization block；MCU is the master chip of controller, can download control program；Load is load；
VDC+ is the anode of DC supply input, and GND is the cathode of DC supply input.D1 is zener diode, and C1 is filter capacitor,
For stablizing the voltage obtained on divider resistance R2.R3 is driving current-limiting resistance, for limiting by Q1 device G grid control letter
Number size of current.D2 is switching diode, for the voltage signal for the starting that interlocking signal and R2 divider resistance obtain to be isolated.
R4 and C2 constitutes RC soft starting circuit, and the noise jamming of Q1 devices switch signal generation can be absorbed.
When wiring is correct, R1 resistance and R2 resistance pass through electric resistance partial pressure, obtain that opening for metal-oxide-semiconductor Q1 can be opened on R2
Voltage is opened, so that Q1 is connected, power vd C+ reaches power supply GND forming circuit, normal power supply by Load load.
In the case where input supply voltage has larger fluctuation but does not influence VCC voltage stabilization, Q1 be connected situation not by
The influence of input supply voltage fluctuation, this process are called " circuit anti-interference ", power supply disturbance can be effectively prevent to lead to MOS switch
Malfunction.
With reference to Fig. 6, the present embodiment so-called " circuit anti-interference " specifically refers to: MCU is in stabilized power supply VCC condition of power supply
Under, it can produce control signal, make the conducting of Q2, voltage close to VCC will be generated after Q2 conducting on R5 resistance, C3 is used for R5
Electric resistance partial pressure post filtering, interlocking signal is high level at this time.The present embodiment so-called " self-test interlocking " refers to: interlocking signal is (i.e.
Voltage signal on second partial pressure end) the G grid voltage of control Q1 after D2, so that Q1 is obtained cut-in voltage again, maintains Q1
Conducting；Control instruction is sent by MCU, Q1 is made to maintain conducting.
When wiring error, Q1 device G grid is unable to get cut-in voltage, is in close state always, power vd C+ without
Method reaches power supply GND forming circuit through overload Load, and no current in circuit can prevent circuit burnout and controller from bursting.
Anti-reverse connection circuit of direct current power supply provided by the above embodiment can be applied to various set using the electric appliance of DC power supply
It is standby, such as DC power supply air-conditioning etc..
In conclusion through the above embodiments of the present invention and embodiment, can be realized it is following the utility model has the advantages that
1, it prevents air-conditioner set input power polarity connection from instead resulting in controller and burns and fry plate；
2, the power consumption of itself device of the anti-circnit NOT of power supply is reduced, it is low to improve circuit working efficiency；
3, the switching signal of controllable switch unit realizes interlocking, and switch caused by preventing external power supply from being interfered by surge misses
Movement.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of anti-reverse connection circuit of direct current power supply characterized by comprising direct-flow input end, DC output end, controllable switch list
Member, the first partial pressure unit, isolated location, Switching Power Supply and the second partial pressure unit, wherein
First partial pressure unit is connected between the direct-flow input end and common end, and draws the first partial pressure end；
The input terminal of the Switching Power Supply is connect with the direct-flow input end；
Second partial pressure unit is connected between the output end of the Switching Power Supply and the common end, and draws the second partial pressure
End；
The control terminal of the controllable switch unit and first point of press bond, the first switch end of the controllable switch unit
It is connect with the DC output end, the second switch end of the controllable switch unit is connect with the common end；
One end of the isolated location is connect with the control terminal of the controllable switch unit, the other end of the isolated location and institute
Second point of press bond is stated, the isolated location is used to be isolated the voltage letter on the first partial pressure end and second partial pressure end
Number.
2. circuit according to claim 1, which is characterized in that the Switching Power Supply is used for the straight of the direct-flow input end
Stream input voltage is converted to the voltage of predetermined voltage class, and realizes voltage stabilizing function.
3. circuit according to claim 1, which is characterized in that first partial pressure unit includes: first resistor (R1),
Two resistance (R2), wherein
One end of the first resistor (R1) connects the direct-flow input end, and the other end of the first resistor (R1) is described the
One point of press bond；
One end of the second resistance (R2) and first point of press bond, the other end of the second resistance (R2) with it is described
Common end connection.
4. circuit according to claim 3, which is characterized in that the circuit further include: 3rd resistor (R3), the third
One end of resistance (R3) is connect with the control terminal of the controllable switch unit, the other end of the 3rd resistor (R3) and described the
One point of press bond.
5. circuit according to claim 3, which is characterized in that first partial pressure unit further include: first capacitor (C1),
One end of the first capacitor (C1) and first point of press bond, the other end of the first capacitor (C1) with it is described public
End connection.
6. circuit according to claim 3, which is characterized in that first partial pressure unit further include: zener diode
(D1), the cathode of the zener diode (D1) and first point of press bond, the anode of the zener diode (D1) with
The common end connection.
7. circuit according to claim 1, which is characterized in that the isolated location includes: diode (D2), two pole
The cathode of pipe (D2) is connect with the control terminal of the controllable switch unit, the anode of the diode (D2) and second partial pressure
End connection.
8. circuit according to claim 1, which is characterized in that the circuit further include: the 4th resistance (R4) and the second electricity
Hold (C2), wherein
One end of 4th resistance (R4) is connect with the first switch end of the controllable switch unit, the 4th resistance (R4)
The other end connect with a pole plate of second capacitor (C2), another pole plate of second capacitor (C2) and it is described can
Control the second switch end connection of switch unit.
9. circuit according to claim 1, which is characterized in that the controllable switch unit is insulating gate type field effect tube
(Q1), wherein
The control terminal of the controllable switch unit is the grid of the insulating gate type field effect tube (Q1), the controllable switch unit
First switch end be the insulating gate type field effect tube (Q1) source electrode, the second switch end of the controllable switch unit is institute
State the drain electrode of insulating gate type field effect tube (Q1).
10. circuit according to claim 1, which is characterized in that second partial pressure unit includes:
5th resistance (R5), triode (Q2), the 6th resistance (R6), wherein
One end of 5th resistance (R5) is connect with the emitter of the triode (Q2), the 5th resistance (R5) it is another
End is connect with the common end；
One end of 6th resistance (R6) is connect with the output end of the Switching Power Supply, described
The other end of 6th resistance (R6) is connect with the base stage of the triode (Q2)；
The collector of the triode (Q2) is connect with the output end of the Switching Power Supply；The transmitting of the triode (Q2) is extremely
Second partial pressure end.
11. circuit according to claim 1, which is characterized in that second partial pressure unit include: the 5th resistance (R5),
Triode (Q2), control chip, wherein
One end of 5th resistance (R5) is connect with the emitter of the triode (Q2), the 5th resistance (R5) it is another
End is connect with the common end；
The control chip is powered by the Switching Power Supply, the control terminal of the control chip and the base stage of the triode (Q2)
Connection；
The collector of the triode (Q2) is connect with the output end of the Switching Power Supply；The transmitting of the triode (Q2) is extremely
Second partial pressure end.
12. circuit described in 0 or 11 according to claim 1, which is characterized in that second partial pressure unit further include: third electricity
Hold (C3), a pole plate of the third capacitor (C3) connect with the common end, another pole plate of the third capacitor and
The emitter of the triode (Q2) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111342442A (en) * | 2020-04-07 | 2020-06-26 | 达闼机器人有限公司 | Reverse connection prevention power supply protection circuit, power supply management system and robot |
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
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| CN110086162B (en) | 2020-04-28 |
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