CN204947695U - A kind of charging circuit for electric vehicles - Google Patents
A kind of charging circuit for electric vehicles Download PDFInfo
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- CN204947695U CN204947695U CN201520713530.0U CN201520713530U CN204947695U CN 204947695 U CN204947695 U CN 204947695U CN 201520713530 U CN201520713530 U CN 201520713530U CN 204947695 U CN204947695 U CN 204947695U
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Abstract
The utility model discloses a kind of charging circuit for electric vehicles, comprise PWM translation circuit, transformer T, inductance L 1, electric capacity C1, resistance R1, diode D1 and comparator U1, PWM translation circuit two input connects 220V alternating current two ends respectively, PWM translation circuit two output is connection transformer T coil L1 two ends respectively, transformer T coil L3 one end connects diode D1, diode D1 negative pole connects diode D2 negative pole and inductance L 1 respectively, the diode D2 positive pole connection transformer T coil L3 other end, inductance L 1 other end connects electric capacity C1 respectively, resistance R7 and diode D3 positive pole.The output circuit of the utility model charging circuit for electric vehicles adopts Schottky diode rectification, there is the features such as forward voltage drop is little, loss is little, efficiency is high, high frequency characteristics is good, L1, C1 form LC type filter circuit, inductance L 1 also has the effect of anti-output instantaneous short circuit, R4 is that load is held concurrently bleeder resistance, for C1 electric discharge provides path time unloaded, circuit structure is simple, and stability is high.
Description
Technical field
The utility model relates to a kind of charging circuit, specifically a kind of charging circuit for electric vehicles.
Background technology
Along with popularizing of electric motor car, electric motor car charging technique also receives the concern of people.The electric vehicle power accumulator of China is mostly lead acid accumulator, this mainly due to lead acid accumulator possess skills maturation, cost is low, battery capacity is large, follow the advantages such as load good output, memory-less effect, but traditional normal charge overlong time, charge loss is large, seriously governs the development of electric motor car.
Utility model content
The purpose of this utility model is to provide a kind of charging circuit for electric vehicles, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of charging circuit for electric vehicles, comprise PWM translation circuit, transformer T, inductance L 1, electric capacity C1, resistance R1, diode D1 and comparator U1, described PWM translation circuit two input connects 220V alternating current two ends respectively, PWM translation circuit two output is connection transformer T coil L1 two ends respectively, transformer T coil coil L3 one end connects diode D1, diode D1 negative pole connects diode D2 negative pole and inductance L 1 respectively, the diode D2 positive pole connection transformer T coil L3 other end, inductance L 1 other end connects electric capacity C1 respectively, resistance R7 and diode D3 positive pole, diode D3 negative pole connects batteries E positive pole, batteries E negative pole is the contact resistance R7 other end respectively, the electric capacity C1 other end and resistance R3 ground connection, the resistance R3 other end is connection transformer T coil L3 tap and resistance R2 respectively, the resistance R2 other end is contact resistance R1 and comparator U1 inverting input respectively, resistance R1 other end connection control circuit, comparator U1 in-phase end ground connection, comparator U1 power end connects power supply VCC and resistance R4 respectively, the resistance R4 other end is connecting luminous diode D5 positive pole and triode VT1 collector electrode respectively, triode VT1 grounded emitter, triode VT1 base stage contact resistance R6, the resistance R6 other end is contact resistance R5 and comparator U1 output respectively, resistance R5 other end connecting luminous diode D4 positive pole, light-emitting diode D4 negative pole connecting luminous diode D4 negative pole ground connection.
As further program of the utility model: described diode D1 and diode D2 is Schottky diode.
As further program of the utility model: described PWM translation circuit adopts TL494 to control.
As the utility model further scheme: described comparator U1 adopts LM358P.
Compared with prior art, the beneficial effects of the utility model are: the output circuit of the utility model charging circuit for electric vehicles adopts Schottky diode rectification, there is the features such as forward voltage drop is little, loss is little, efficiency is high, high frequency characteristics is good, L1, C1 form LC type filter circuit, inductance L 1 also has the effect of anti-output instantaneous short circuit, and R4 is that load is held concurrently bleeder resistance, for C1 electric discharge provides path time unloaded, circuit structure is simple, and stability is high.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of charging circuit for electric vehicles.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of charging circuit for electric vehicles, comprise PWM translation circuit, transformer T, inductance L 1, electric capacity C1, resistance R1, diode D1 and comparator U1, PWM translation circuit two input connects 220V alternating current two ends respectively, PWM translation circuit two output is connection transformer T coil L1 two ends respectively, transformer T coil coil L3 one end connects diode D1, diode D1 negative pole connects diode D2 negative pole and inductance L 1 respectively, the diode D2 positive pole connection transformer T coil L3 other end, inductance L 1 other end connects electric capacity C1 respectively, resistance R7 and diode D3 positive pole, diode D3 negative pole connects batteries E positive pole, batteries E negative pole is the contact resistance R7 other end respectively, the electric capacity C1 other end and resistance R3 ground connection, the resistance R3 other end is connection transformer T coil L3 tap and resistance R2 respectively, the resistance R2 other end is contact resistance R1 and comparator U1 inverting input respectively, resistance R1 other end connection control circuit, comparator U1 in-phase end ground connection, comparator U1 power end connects power supply VCC and resistance R4 respectively, the resistance R4 other end is connecting luminous diode D5 positive pole and triode VT1 collector electrode respectively, triode VT1 grounded emitter, triode VT1 base stage contact resistance R6, the resistance R6 other end is contact resistance R5 and comparator U1 output respectively, resistance R5 other end connecting luminous diode D4 positive pole, light-emitting diode D4 negative pole connecting luminous diode D4 negative pole ground connection.
Diode D1 and diode D2 is Schottky diode.
PWM translation circuit adopts TL494 to control.
Comparator U1 adopts LM358P.
Operation principle of the present utility model is: refer to Fig. 1,220V electric main is after being rectified into direct current, the double-end driving circuit be made up of PWM switching circuit TL494 converts high-frequency alternating current to, again after output transformer T is transformed into required voltage, become 44V/1.8A pulse dc power by Schottky diode D1 with D2 full-wave rectification, then batteries E is charged.
The output circuit of charging circuit adopts Schottky diode rectification, there is the features such as forward voltage drop is little, loss is little, efficiency is high, high frequency characteristics is good, L1, C1 form LC type filter circuit, inductance L 1 also has the effect of anti-output instantaneous short circuit, R4 is that load is held concurrently bleeder resistance, for C1 electric discharge provides path time unloaded.
Charge condition indicating circuit is made up of components and parts such as LM358P, D4, D5, VT1, R5.When circuit ON 220V civil power, when output does not connect batteries E charging, the electric current flowing through sampling resistor R3 is minimum, the sampled voltage detected is almost 0V, at this moment operational amplifier integrated package LM358P end of oppisite phase provides about+0.0lV voltage by resistance R1, make this pin current potential higher than the current potential of in-phase end, comparator U1 output output low level, light-emitting diode D4 ends not luminous; VT1 is because ending without forward bias voltage, and light-emitting diode D5 provides forward current by R4 and conducting is lighted, and when charger is unloaded or charging is less than 50mA, Light-Emitting Diode D4, D5 are all luminous.
When charger connects charging by regulation, the electric current flowing through R3 is about 1.8A, at this moment LM358P end of oppisite phase current potential transfers the negative potential of about-0.17V to, comparator U1 upset exports the high voltage of about 20V, VT1 obtains forward bias voltage saturation conduction, makes D5 positive terminal be electronegative potential, and light-emitting diode D5 ends not luminous, light-emitting diode D4 is luminous, represents that charger is just in charging process.
When batteries E completes charging, the nearly 44V of its terminal voltage, charging current drops to below 50mA, LM358P end of oppisite phase becomes positive potential, so comparator U1 overturns output LOW voltage, light-emitting diode D4 extinguishes, and light-emitting diode D5 lights, represent that batteries E completes charging, be in trickle state.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (4)
1. a charging circuit for electric vehicles, comprise PWM translation circuit, transformer T, inductance L 1, electric capacity C1, resistance R1, diode D1 and comparator U1, it is characterized in that, described PWM translation circuit two input connects 220V alternating current two ends respectively, PWM translation circuit two output is connection transformer T coil L1 two ends respectively, transformer T coil coil L3 one end connects diode D1, diode D1 negative pole connects diode D2 negative pole and inductance L 1 respectively, the diode D2 positive pole connection transformer T coil L3 other end, inductance L 1 other end connects electric capacity C1 respectively, resistance R7 and diode D3 positive pole, diode D3 negative pole connects batteries E positive pole, batteries E negative pole is the contact resistance R7 other end respectively, the electric capacity C1 other end and resistance R3 ground connection, the resistance R3 other end is connection transformer T coil L3 tap and resistance R2 respectively, the resistance R2 other end is contact resistance R1 and comparator U1 inverting input respectively, resistance R1 other end connection control circuit, comparator U1 in-phase end ground connection, comparator U1 power end connects power supply VCC and resistance R4 respectively, the resistance R4 other end is connecting luminous diode D5 positive pole and triode VT1 collector electrode respectively, triode VT1 grounded emitter, triode VT1 base stage contact resistance R6, the resistance R6 other end is contact resistance R5 and comparator U1 output respectively, resistance R5 other end connecting luminous diode D4 positive pole, light-emitting diode D4 negative pole connecting luminous diode D4 negative pole ground connection.
2. charging circuit for electric vehicles according to claim 1, is characterized in that, described diode D1 and diode D2 is Schottky diode.
3. charging circuit for electric vehicles according to claim 1, is characterized in that, described PWM translation circuit adopts TL494 to control.
4. charging circuit for electric vehicles according to claim 1, is characterized in that, described comparator U1 adopts LM358P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520713530.0U CN204947695U (en) | 2015-09-16 | 2015-09-16 | A kind of charging circuit for electric vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520713530.0U CN204947695U (en) | 2015-09-16 | 2015-09-16 | A kind of charging circuit for electric vehicles |
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| Publication Number | Publication Date |
|---|---|
| CN204947695U true CN204947695U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520713530.0U Expired - Fee Related CN204947695U (en) | 2015-09-16 | 2015-09-16 | A kind of charging circuit for electric vehicles |
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| CN (1) | CN204947695U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300527A (en) * | 2016-08-31 | 2017-01-04 | 苏州迈力电器有限公司 | Safely controllable charger for electric motor car |
-
2015
- 2015-09-16 CN CN201520713530.0U patent/CN204947695U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300527A (en) * | 2016-08-31 | 2017-01-04 | 苏州迈力电器有限公司 | Safely controllable charger for electric motor car |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20160916 |