CN209250229U - 380VAC protects circuit and charger - Google Patents
380VAC protects circuit and charger Download PDFInfo
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- CN209250229U CN209250229U CN201822046535.9U CN201822046535U CN209250229U CN 209250229 U CN209250229 U CN 209250229U CN 201822046535 U CN201822046535 U CN 201822046535U CN 209250229 U CN209250229 U CN 209250229U
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Abstract
The utility model relates to power electronics fields; specifically a kind of reliable operation, highly-safe, 380VAC protection circuit and charger of reasonable cost; it is characterized in that, being equipped with input lightning protection circuit, input power supply interlock circuit, input filter rectification circuit, high pressure auxiliary power circuit, high tension voltage sample circuit；Wherein input lightning protection circuit is set to the front end of input power supply interlock circuit, the rear end of input power supply interlock circuit connects input rectifying filter circuit, the electrical signal of high pressure auxiliary power circuit connects between input lightning protection circuit and input power supply interlock circuit, the sampled signal input of high tension voltage sample circuit connects in the front end of input power supply interlock circuit, pass through the implementation of this programme, expand the scope of application of product, trouble free service performance of the product under complex working condition is improved, product market can be effectively reduced and return the rate of moving back.
Description
Technical field:
The utility model relates to power electronics field, specifically a kind of reliable operation, highly-safe, cost are closed
The 380VAC protection circuit and charger of reason.
Background technique:
It is powered currently, the Switching Power Supply product of middle low power is substantially using single-phase 220VAC.In device application aspect,
The pressure resistance of the device of input stage exchange side is chosen according to 300VAC；On design protection, generally in input stage firewire or zero
Protective tube is concatenated on line.The probability that this circuit design goes wrong under normal usage is lower, but some special
Industrial application scene, scene exist simultaneously single-phase and three-phase power line, and live user is easy to for three-phase electricity being linked into fill
Motor product, this results in the failure damage of charger product.
Summary of the invention:
The utility model is to shortcoming and defect existing in the prior art, when proposing a kind of 380VAC power supply for access
380VAC protection circuit and charger and its application.
The utility model can reach by the following technical programs:
A kind of 380VAC protection circuit, which is characterized in that be equipped with input lightning protection circuit, input power supply interlock circuit, input
Filter rectifier, high pressure auxiliary power circuit, high tension voltage sample circuit；Wherein input lightning protection circuit is set to input power supply
The rear end of the front end of interlock circuit, input power supply interlock circuit connects input rectifying filter circuit, high pressure auxiliary power circuit
Electrical signal connects between input lightning protection circuit and input power supply interlock circuit, the sampled signal of high tension voltage sample circuit
Input terminates at the front end of input power supply interlock circuit,
The input lightning protection circuit is equipped with the first varistor MOV1, the second varistor MOV2 and third varistor
MOV3, wherein between the first varistor MOV1 access input power supply zero curve and firewire, the second varistor MOV2 access input
It powers between firewire and ground wire, between third varistor MOV3 access input power supply zero curve and ground wire；
The input power supply interlock circuit is equipped with the first relay K1, the second relay K2, the first temperature-sensitive NTC resistance RT1
With the second temperature-sensitive NTC resistance RT2, wherein the normally opened contact of the first relay K1 is series on supply input firewire；Soft start group
It connects after part is connected by the first temperature-sensitive NTC resistance RT1, the second temperature-sensitive NTC resistance RT2 with the normally opened contact of the second relay K2；
Soft start component is in parallel with the first relay K1；
The input filter rectification circuit is located at after input power supply interlock circuit；Input filter rectification circuit includes first
X capacitor C1, the first Y capacitance C2, the second Y capacitance C3, input common mode inductance and input rectifying bridge；First X capacitor C1 is connected to LN line
Between, the first Y capacitance C2 and the second Y capacitance C3 are located at after the first X capacitor C1, and the first Y capacitance C2 access firewire with
Between ground wire, the second Y capacitance C3 is accessed between zero curve and ground wire, is terminated at the first Y capacitance C2, the 2nd Y before inputting common mode inductance
After capacitor C3, input rectifying bridge is terminated after inputting common mode inductance；
The high pressure auxiliary power circuit is equipped with crossfeed component, equalization filtering component and accessory power supply power conversion group
Part；The crossfeed component includes the first filter inductance L1, diode D1, diode D2, diode D3, diode D4, two
Pole pipe D5, diode D6, wherein one end of the first filter inductance L1 is connected to the second temperature-sensitive NTC electricity in input power supply interlock circuit
It hindering on the node between RT2 and the second relay K2, the other end of the first filter inductance L1 is connected to the anode of diode D1, and two
The anode of the cathode connection diode D2 of pole pipe D1, the anode of the cathode connection diode 3 of diode D2, the cathode of diode D3
The anode of diode D4 is connected, the cathode of third diode D3 is connected to the anode of the 4th diode D4；5th diode D5's
Anode is connected to PFC boost circuit anode bus, and the cathode of the 5th diode D5 is connected to the anode of the 6th diode D6, and the 4th
The cathode of diode D4 is connected with the cathode of the 6th diode D6, and is connected on equalization filtering component inputs；
The equalization filtering component includes equalizing resistance R1, equalizing resistance R2, equalizing resistance R3, equalizing resistance R4, first
Electrolytic capacitor filter C1, the second electrolytic capacitor filter C2 and the first filtering ceramic disc capacitor C3, one end of the first equalizing resistance R1, the
The anode of one electrolytic capacitor filter C1 is connected with one end of the first filtering ceramic disc capacitor C3, the input as equalization filtering component
End, equalizing resistance R1, equalizing resistance R2, equalizing resistance R3, equalizing resistance R4 series connection, the other end of equalizing resistance R4, the second filter
The other end of the cathode of wave electrolytic capacitor C2 and the first ceramic disc capacitor C3 are connected, and are then attached to PFC boost circuit negative electrode bus,
The cathode and the second filtering electrolysis electricity of the tie point of the equalizing resistance R2 and equalizing resistance R3 and the first electrolytic capacitor filter C1
The cathode for holding C2 is connected.
Accessory power supply power conversion component described in the utility model is that Multiple coil exports inverse-excitation type switch power-supply, this power supply is set
Meter meets under high-pressure situations according to exchange input 530Vac design, the normal work of this power supply.
High tension voltage sample circuit described in the utility model includes that AC rectification component, decompression average value component and isolation are adopted
Sample component；The AC rectification component includes rectifier diode D7, rectifier diode D8, rectifier diode D9, rectifier diode
D10, wherein the anode of rectifier diode D9 is connected on input N line, and the cathode of rectifier diode D9 is connected to rectifier diode
The anode of D10, the anode of rectifier diode D7 are connected to the anode tie point of the first filter inductance L1 Yu diode D1, rectification two
Pole pipe D7 cathode is connected to rectifier diode D8 anode, and rectifier diode D10 cathode is connected to rectifier diode D8 cathode, then
It is connected to decompression average value component inputs；
The decompression average value component includes six dropping resistor R9, R10, R11, R12, R13, R14, four isopotential electricals
R5, R6, R7, R8, the first average value capacitor C4 are hindered, six dropping resistors are sequentially connected in series,
The junction of the other end connection diode D10 cathode and diode D8 cathode of dropping resistor R9, dropping resistor R14
The other end ground connection；Four equipotential resistance are sequentially connected in series, and the front end of resistance R5 and the front end of dropping resistor R9 are connected to two simultaneously
The tie point of pole pipe D10 cathode and diode D8 cathode terminates on the cathode ground wire of PFC bus after resistance R8；First is flat
Mean value capacitor C4 is parallel to the both ends dropping resistor R14；
The isolation sampling component includes triangle wave generating circuit, voltage comparator circuit, light-coupled isolation transmission circuit and MCU
Sample circuit, wherein the output end of triangle wave generating circuit is connected with the input terminal all the way of voltage comparator circuit, and decompression is average
The output end of component is connected with the another way input terminal of voltage comparator circuit, and the output end of voltage comparator circuit and light-coupled isolation pass
The input terminal on transmission of electricity road is connected, and the output end of light-coupled isolation transmission circuit is connected with MCU sample circuit, MCU sample circuit and control
Unit processed is connected.
As above scheme as it can be seen that scheme described in this case the voltage of ac input end mouth can be carried out it is effective electrically every
From, while voltage value is accurately sampled.
A kind of charger, which is characterized in that single equipped with above-mentioned 380VAC protection circuit, ac-dc conversion circuit and control
Member, wherein 380VAC protects the rear end of the input rectifying filter circuit in circuit to connect ac-dc conversion circuit, control unit point
With ac-dc conversion circuit and 380VAC protection circuit in high pressure auxiliary power circuit, high tension voltage sample circuit phase
Even.
380VAC protection circuit described in the utility model is circuit or its flexible circuit in above scheme.
Ac-dc conversion circuit described in the utility model includes: PFC active power factor translation circuit, for mentioning outside
The electric main of confession is transformed to high voltage bus direct current, while improving the power factor of complete machine；DC/DC translation circuit, for real
High voltage bus DC power conversion is level voltage required for battery charges by the transformation of existing DC voltage.
Control unit described in the utility model includes: main control MCU unit, for the realization of complete machine control algolithm, to complete machine
The control of working sequence logic and the response of protection act；Interior lamp driving circuit, for receiving the output of main control MCU unit
Control signal, driving is carried out to indicator light on charger ontology and is shown；External drive circuit of indicator, for receiving master control
The control signal of MCU unit output, carries out driving to the indicator light outside charger and shows；
First temperature sampling circuit, the sampling for charger product internal temperature；
Second temperature sample circuit, the sampling for charger product ambient temperature；
First driving circuit, the driving for the first relay in the input power supply interlock circuit；
Second driving circuit, the driving for the second relay in the input power supply interlock circuit；
Third driving circuit, the driving for output relay in the ac-dc conversion circuit.
It is described by above scheme as it can be seen that when inputting supply voltage within the scope of charger product normal working voltage
380VAC protects circuit not execute movement, by ac-dc conversion circuit, provides power grid to Alternating Current Power Supply and is converted to power battery
Direct current supply required for charging.The power supply power supply system for accessing mistake, when causing system voltage excessively high, 380VAC protects circuit
Protection act is carried out, ac-dc conversion circuit is protected in isolation high-voltage fence power supply.
When in use, described control unit passes through the first temperature sampling circuit and the second temperature to charger described in the utility model
Spend sample circuit acquisition charger interior environment temperature and charger product ambient temperature；Control unit is according to the ring of acquisition
Border temperature carries out the calibration of charging curve；The algorithm of calibration are as follows: on the basis of 20 DEG C, 1 DEG C of the every increase/decrease of environment temperature fills
Motor output voltage, which is normalized to single branch battery, reduces or increases 4mV or 3mV；Control unit is bent according to calibrated charging
The direct current output of ac-dc conversion circuit described in line traffic control reaches the point of voltage and current required for being electrically charged battery.
By above scheme as it can be seen that passing through the implementation of this programme application method, by the reality for realizing linear fit control algolithm
It applies, improves the sampling precision and the linearity of alternating supply voltage.By described control unit according to input supply voltage state,
The movement of two relays, can effectively realize input supply voltage and ac-dc conversion circuit electricity in control input interlock circuit
Physical isolation on gas route reaches determining protective effect.Control unit can be given by high pressure auxiliary power circuit simultaneously
Safe power supply guarantees under any voltage status, can provide power supply for control unit circuit.By charging described in this programme
The implementation of machine application method, it is ensured that charging curve meets charging requirement of the battery at any temperature, avoid overcharge with
The generation of charge less electrical phenomena.
By the implementation of this programme, the scope of application of product is expanded, improves safe work of the product under complex working condition
Make performance, product market can be effectively reduced and return the rate of moving back.
Detailed description of the invention:
Attached drawing 1 is the structural block diagram of the utility model.
Attached drawing 2 is the circuit diagram of the utility model 380VAC protection circuit.
Appended drawing reference: 1 input lightning protection circuit；2 input power supply interlock circuits；3 high pressure auxiliary power circuits；4 high tension voltages
Sample circuit；5 input filter rectification circuits.
Specific embodiment:
Referring to Fig. 2, the utility model proposes 380VAC protection circuit include: input lightning protection circuit 1, input power supply interlocking
Circuit 2, high pressure auxiliary power circuit 3, high tension voltage sample circuit 4 and input filter rectification circuit 5；Input lightning protection circuit 1 simultaneously
Connection is placed in input power port, and input power supply interlock circuit 2 is series on power supply L line；The input of high pressure auxiliary circuit circuit 3
It is connected with the DC bus after power supply L line and PFC boost；High tension voltage sample circuit 4 with input LN line and PFC boost after it is straight
The ground wire for flowing bus is connected.
First varistor MOV1 is parallel between input power supply LN line in input lightning protection circuit 1, the second varistor
MOV2 is parallel between input power supply L line and Earth line, third varistor MOV3 parallel connection and input power supply N line and Earth line
Between.
The normally opened contact of first relay K1 is series on input L line in power supply interlock circuit 2；First temperature-sensitive NTC resistance
The normally opened contact series connection of RT1, the second temperature-sensitive NTC resistance RT2 series connection and the second relay K2, constitutes soft start component；Soft start
Component is in parallel with the first relay K1.
Input filter rectification circuit 5 is located at after input power supply interlock circuit；First X capacitor C1 is parallel between LN line；
Before first Y capacitance C1 is parallel to LN line after connecting with the second Y capacitance C2, the first Y capacitance C1 and the second concatenated section of Y capacitance C2
Point is connected to grounding point Earth.
The crossfeed component of high pressure accessory power supply 3 includes the first filter inductance L1, the first to the 6th diode D1-
D6.One end of first filter inductance L1 is connected to the second temperature-sensitive NTC resistance RT2 and the second relay in input power supply interlock circuit
On the concatenated node of K2, the other end of the first filter inductance L1 is connected to the anode of first diode D1, first diode D1's
Cathode is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the anode of third diode D3, third
The cathode of diode D3 is connected to the anode of the 4th diode D4；The anode of 5th diode D5 is being connected to PFC boost circuit just
The cathode of pole bus, the 5th diode D5 is connected to the anode of the 6th diode D6；The cathode and the six or two of 4th diode D4
The cathode of pole pipe D6 is connected, and is connected on equalization filtering component inputs.
The equalization filtering component of high pressure accessory power supply 3 includes first to fourth equalizing resistance R1-R4, the first filtering electrolysis electricity
Hold C1, the second electrolytic capacitor filter C2 and the first filtering ceramic disc capacitor C3.One end R1 of first equalizing resistance, the first filtering electrolysis
The anode of capacitor C1 is connected with one end of the first filtering ceramic disc capacitor C3, the input terminal as equalization filtering component.4th presses
One end of one end of resistance R4, the cathode of the second electrolytic capacitor filter C2 and the first ceramic disc capacitor C3 is connected, and is then attached to PFC
Booster circuit negative electrode bus.The tie point and the first electrolytic capacitor filter of the second equalizing resistance R2 and third equalizing resistance R3
The cathode of the cathode of C1 and the second electrolytic capacitor filter C2 are connected.
The accessory power supply power conversion component of high pressure accessory power supply 3 is that Multiple coil exports inverse-excitation type switch power-supply.This
Power supply design meets under high-pressure situations according to exchange input 530Vac design, this power supply works normally.
The AC rectification component of high tension voltage sample circuit 4 includes the 7th to the tenth rectifier diode D7-D10.7th is whole
Stream diode D7 anode is connected on input N line, and the 7th rectifier diode D7 cathode is connected to the 8th rectifier diode D8 anode.
9th rectifier diode D9 anode is connected to the first filter inductance L1 and first diode D1 anode tie point, the 9th two poles of rectification
Pipe D9 cathode is connected to the tenth rectifier diode D10 anode, and the tenth rectifier diode D10 cathode is connected to the 8th rectifier diode
D8 cathode is then attached to decompression average value component inputs.
The decompression average value component of high tension voltage sample circuit 4 includes the first to the 6th dropping resistor R9-R14, first flat
Mean value capacitor C4 and first to fourth equipotential resistance (R5-R8).First dropping resistor is suitable to the 6th dropping resistor (R9-R14)
Sequence series connection, wherein one end of the first dropping resistor R9 is connected to the tenth rectifier diode D10 cathode and the 8th rectifier diode D8
At the node of cathode connection, one end of the 6th dropping resistor R14 is connected on the cathode ground wire of PFC bus；First average value electricity
Hold C4 and is parallel to the upper of the 6th dropping resistor R14.First to fourth equipotential resistance (R5-R8) sequence is connected, wherein first etc.
One end of current potential resistance R5 is connected to the node that the tenth rectifier diode D10 cathode is connect with the 8th rectifier diode D8 cathode
Place, one end of the 4th equipotential resistance R8 is connected on the cathode ground wire of PFC bus.
Isolation sampling component includes triangle wave generating circuit, voltage comparator circuit, optocoupler described in high tension voltage sample circuit 4
Isolation and transmission circuit and MCU sample circuit.
Circuit through the foregoing embodiment controls defeated it is found that by described control unit according to input supply voltage state
Enter the movement of two relays in interlock circuit, can effectively realize input supply voltage and ac-dc conversion circuit electric wiring
On physical isolation, reach determining protective effect.It can be supplied safely to control unit by high pressure auxiliary power circuit simultaneously
Electricity guarantees under any voltage status, can provide power supply for control unit circuit.
Claims (6)
1. a kind of 380VAC protects circuit, which is characterized in that be equipped with input lightning protection circuit, input power supply interlock circuit, input filter
Wave rectification circuit, high pressure auxiliary power circuit, high tension voltage sample circuit；Wherein it is mutual to be set to input power supply for input lightning protection circuit
The rear end of the front end of lock circuit, input power supply interlock circuit connects input rectifying filter circuit, the electricity of high pressure auxiliary power circuit
Signal output end connects between input lightning protection circuit and input power supply interlock circuit, and the sampled signal of high tension voltage sample circuit is defeated
Enter to terminate at the front end of input power supply interlock circuit, the input lightning protection circuit is equipped with the first varistor MOV1, second pressure-sensitive
Resistance MOV2 and third varistor MOV3, wherein between the first varistor MOV1 access input power supply zero curve and firewire, the
Between two varistor MOV2 access input power supply firewire and ground wire, third varistor MOV3 access input power supply zero curve and ground
Between line；
Input power supply interlock circuit is equipped with the first relay K1, the second relay K2, the first temperature-sensitive NTC resistance RT1 and the
Two temperature-sensitive NTC resistance RT2, wherein the normally opened contact of the first relay K1 is series on supply input firewire；Soft start component by
It connects after first temperature-sensitive NTC resistance RT1, the second temperature-sensitive NTC resistance RT2 series connection with the normally opened contact of the second relay K2；It is soft to open
Dynamic component is in parallel with the first relay K1；
The input filter rectification circuit is located at after input power supply interlock circuit；Input filter rectification circuit includes the first X electricity
Hold C1, the first Y capacitance C2, the second Y capacitance C3, input common mode inductance and input rectifying bridge；First X capacitor C1 be connected to LN line it
Between, the first Y capacitance C2 and the second Y capacitance C3 are located at after the first X capacitor C1, and the first Y capacitance C2 access firewire and ground
Between line, the second Y capacitance C3 is accessed between zero curve and ground wire, is terminated at the first Y capacitance C2, the 2nd Y electricity before inputting common mode inductance
After holding C3, input rectifying bridge is terminated after inputting common mode inductance；
The high pressure auxiliary power circuit is equipped with crossfeed component, equalization filtering component and accessory power supply power conversion component；
The crossfeed component includes the first filter inductance L1, diode D1, diode D2, diode D3, diode D4, diode
D5, diode D6, wherein one end of the first filter inductance L1 is connected to the second temperature-sensitive NTC resistance in input power supply interlock circuit
On node between RT2 and the second relay K2, the other end of the first filter inductance L1 is connected to the anode of diode D1, two poles
The anode of the cathode connection diode D2 of pipe D1, the anode of the cathode connection diode 3 of diode D2, the cathode of diode D3 connect
The anode of diode D4 is connect, the cathode of third diode D3 is connected to the anode of the 4th diode D4；The sun of 5th diode D5
Pole is connected to PFC boost circuit anode bus, and the cathode of the 5th diode D5 is connected to the anode of the 6th diode D6, and the four or two
The cathode of pole pipe D4 is connected with the cathode of the 6th diode D6, and is connected on equalization filtering component inputs；
The equalization filtering component includes equalizing resistance R1, equalizing resistance R2, equalizing resistance R3, equalizing resistance R4, the first filtering
Electrolytic capacitor C1, the second electrolytic capacitor filter C2 and the first filtering ceramic disc capacitor C3, one end of the first equalizing resistance R1, the first filter
The anode of wave electrolytic capacitor C1 is connected with one end of the first filtering ceramic disc capacitor C3, as the input terminal of equalization filtering component,
Piezoresistance R1, equalizing resistance R2, equalizing resistance R3, equalizing resistance R4 series connection, the other end of equalizing resistance R4, the second filtering electrolysis
The other end of the cathode of capacitor C2 and the first ceramic disc capacitor C3 are connected, and are then attached to PFC boost circuit negative electrode bus, described equal
The cathode and the second electrolytic capacitor filter C2 of the tie point of piezoresistance R2 and equalizing resistance R3 and the first electrolytic capacitor filter C1
Cathode is connected.
2. a kind of 380VAC according to claim 1 protects circuit, which is characterized in that the accessory power supply power conversion group
Part is that Multiple coil exports inverse-excitation type switch power-supply, and the design of this power supply meets under high-pressure situations according to exchange input 530Vac design,
The normal work of this power supply.
3. a kind of 380VAC according to claim 1 protects circuit, which is characterized in that the high tension voltage sample circuit packet
Include AC rectification component, decompression average value component and isolation sampling component；The AC rectification component include rectifier diode D7,
Rectifier diode D8, rectifier diode D9, rectifier diode D10, wherein the anode of rectifier diode D9 is connected to input N line
On, the cathode of rectifier diode D9 is connected to the anode of rectifier diode D10, and the anode of rectifier diode D7 is connected to the first filter
The anode tie point of wave inductance L1 and diode D1, rectifier diode D7 cathode are connected to rectifier diode D8 anode, rectification two
Pole pipe D10 cathode is connected to rectifier diode D8 cathode, is then attached to decompression average value component inputs；
The decompression average value component includes six dropping resistor R9, R10, R11, R12, R13, R14, four equipotential resistance
R5, R6, R7, R8, the first average value capacitor C4, six dropping resistors are sequentially connected in series, and the other end of dropping resistor R9 connects two poles
The junction of pipe D10 cathode and diode D8 cathode, the other end ground connection of dropping resistor R14；Four equipotential resistance are successively gone here and there
Connection, the front end of resistance R5 and the front end of dropping resistor R9 are connected to the tie point of diode D10 cathode and diode D8 cathode simultaneously,
It is terminated at after resistance R8 on the cathode ground wire of PFC bus；First average value capacitor C4 is parallel to the both ends dropping resistor R14；Institute
Stating isolation sampling component includes triangle wave generating circuit, voltage comparator circuit, light-coupled isolation transmission circuit and MCU sample circuit,
Wherein the output end of triangle wave generating circuit is connected with the input terminal all the way of voltage comparator circuit, is depressured the output of average component
End is connected with the another way input terminal of voltage comparator circuit, and the output end of voltage comparator circuit is defeated with light-coupled isolation transmission circuit
Enter end to be connected, the output end of light-coupled isolation transmission circuit is connected with MCU sample circuit, and MCU sample circuit is connected with control unit
It connects.
4. a kind of charger, which is characterized in that equipped with as described in any one of claim 1-3 380VAC protection circuit,
Ac-dc conversion circuit and control unit, wherein 380VAC protects the rear end connection of the input rectifying filter circuit in circuit to hand over straight
Translation circuit is flowed, control unit is electric with the high pressure accessory power supply in ac-dc conversion circuit and 380VAC protection circuit respectively
Road, high tension voltage sample circuit are connected.
5. a kind of charger according to claim 4, it is characterised in that the ac-dc conversion circuit includes: PFC active
Power factor translation circuit, the electric main for providing outside is transformed to high voltage bus direct current, while improving complete machine
Power factor；High voltage bus DC power conversion is battery charging for realizing the transformation of DC voltage by DC/DC translation circuit
Required level voltage.
6. a kind of charger according to claim 4, it is characterised in that described control unit includes: main control MCU unit, is used
In the realization of complete machine control algolithm, the response of control and protection act to complete machine working sequence logic；Interior lamp driving
Circuit carries out driving to indicator light on charger ontology and shows for receiving the control signal of main control MCU unit output；It is external
Drive circuit of indicator drives the indicator light outside charger for receiving the control signal of main control MCU unit output
Display；
First temperature sampling circuit, the sampling for charger product internal temperature；
Second temperature sample circuit, the sampling for charger product ambient temperature；
First driving circuit, the driving for the first relay in the input power supply interlock circuit；
Second driving circuit, the driving for the second relay in the input power supply interlock circuit；
Third driving circuit, the driving for output relay in the ac-dc conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822046535.9U CN209250229U (en) | 2018-12-07 | 2018-12-07 | 380VAC protects circuit and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822046535.9U CN209250229U (en) | 2018-12-07 | 2018-12-07 | 380VAC protects circuit and charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209250229U true CN209250229U (en) | 2019-08-13 |
Family
ID=67531770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822046535.9U Active CN209250229U (en) | 2018-12-07 | 2018-12-07 | 380VAC protects circuit and charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209250229U (en) |
-
2018
- 2018-12-07 CN CN201822046535.9U patent/CN209250229U/en active Active
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