CN205656227U - On -vehicle motor output current sampling circuit that fills - Google Patents
On -vehicle motor output current sampling circuit that fills Download PDFInfo
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- CN205656227U CN205656227U CN201620177424.XU CN201620177424U CN205656227U CN 205656227 U CN205656227 U CN 205656227U CN 201620177424 U CN201620177424 U CN 201620177424U CN 205656227 U CN205656227 U CN 205656227U
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Abstract
The utility model discloses an on -vehicle motor output current sampling circuit that fills, including electric current acquisition circuit, differential amplification circuit, signal follower circuit and RC filter circuit, electric current acquisition circuit's output and differential amplification circuit's input electric connection, differential amplification circuit's output and signal follower circuit's input electric connection, signal follower circuit's output and RC filter circuit's input electric connection, the magnitude of voltage of sampling conversion deliver to DSP chip department with voltage after through RC filter circuit. The utility model discloses an on -vehicle motor output current sampling circuit that fills adopts IGBT rectification + BUCK to step down, adopts IGBT module encapsulation components and parts, avoided well realizing on -vehicle charging well because the vibration leads to equipment to damage, output current then adopt for the sampling of hall current sensor, simple and convenient realization output current control, the voltage that can effectively restrain the peak disturbs, interference immunity is strong, application that can be better to new forms of energy are on -vehicle charge in the aspect of.
Description
Technical field
This utility model relates to the technical field of electric circuit inspection, particularly relates to a kind of Vehicular charger output electric current
Sample circuit.
Background technology
It is controlled straight that Vehicular charger is that exchange is changed into by a on-off action utilizing power semiconductor device
Stream output, thus realize to charging on-vehicle battery.
Along with modern power electronics technology and the fast development of microelectric technique and the rise of new forms of energy, use
The charging module that separating component is designed and developed is high-power owing to accomplishing, high-power, can only use mould
Block output-parallel realizes, the most then more serious owing to vibrating ratio when of automotive service, thus module
Owing to vibration causes damaging.And when Vehicular charger is operated at full capacity, owing to being interfered, actual current
Inconsistent with the current value of keyboard & display.
Utility model content
For above-mentioned deficiency of the prior art, technical problem to be solved in the utility model is to provide one
Plant Vehicular charger output current sampling circuit, use Hall current sensor sampled output current, thus real
Now export the control of electric current, and be applied to new forms of energy vehicle-mounted charge aspect.
In order to solve above-mentioned technical problem, the utility model proposes a kind of Vehicular charger output current sample
Circuit, including current collection circuit, differential amplifier circuit, signal follow circuit and RC filter circuit, described
The outfan of current collection circuit is electrically connected with the input of differential amplifier circuit, described differential amplifier circuit
The input of outfan and signal follow circuit be electrically connected with, the outfan of described signal follow circuit and RC
The input of filter circuit is electrically connected with, and the magnitude of voltage that sampling converts is by delivering to voltage after RC filter circuit
At dsp chip.
In implementing of the present utility model one, described current collection circuit includes Hall current sensor, Hall
First pin of current sensor is connected with+15V voltage, the second pin of Hall current sensor and-15V electricity
Pressure be connected, the 3rd pin of Hall current sensor by series connection resistance R31 and resistance R32 after with difference
The input of amplifying circuit is connected, the 4th pin ground connection of Hall current sensor；And Hall current passes
First pin of sensor by electric capacity C42 parallel with one another, electric capacity C45 ground connection, Hall current sensor
Second pin is by electric capacity C47 parallel with one another, electric capacity C48 ground connection.
Further, described differential amplifier circuit include operational amplifier UA, resistance R37, electric capacity C46,
Resistance R28, electric capacity C37 and electric capacity C39, the negative-phase input of operational amplifier UA is by parallel with one another
Resistance R28, electric capacity C37 be connected with the outfan of self, the normal phase input end of operational amplifier UA lead to
Crossing resistance R37 ground connection, the positive and negative power end of operational amplifier UA connects+15V ,-15V voltage respectively,
The other end of resistance R37 is connected by electric capacity C46 and+15V voltage, one end ground connection of electric capacity C39, separately
One end is connected with-15V voltage.
In an embodiment of the present utility model, described signal follow circuit includes operational amplifier UB, resistance
R114 and resistance R115, the negative-phase input of described operational amplifier UB is by resistance R35 and described difference
The outfan of amplifying circuit connects and passes through the outfan connection of resistance R114 and operational amplifier UB, computing
The normal phase input end of amplifier UB connects ground connection after resistance R115.
Further, described RC filter circuit includes resistance R33 and electric capacity C41, one end of electric capacity C41
Ground connection, the other end connects resistance R33.
Preferably, described resistance R37, resistance R28, resistance R35, resistance R114, resistance R115 and
The resistance of resistance R33 is respectively 1K Ω, 4.7K Ω, 2K Ω, 2K Ω, 1K Ω and 1K Ω.Described electricity
Holding C46, electric capacity C39 and electric capacity C41 is 0603-100NF/50V electric capacity, electric capacity C37 is 0603-1
NF/50V electric capacity.
Preferably, described operational amplifier UA uses operational amplifier TL082CDT.
Implement this utility model, have the advantages that
Vehicular charger of the present utility model output current sampling circuit uses IGBT rectification+BUCK blood pressure lowering,
Use IGBT module encapsulation components and parts, avoid well owing to vibration causes device damage, realize well
Vehicle-mounted charge, export that electric current then uses samples for Hall current sensor, realizes output simply and easily
Electric current controls, and this utility model sampling precision is high, can effectively suppress the voltage disturbance of spike, strong interference immunity,
Need not debug, can preferably be applied to new forms of energy vehicle-mounted charge aspect.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the Vehicular charger output current sampling circuit that this utility model provides.
Fig. 2 is the circuit diagram of the Vehicular charger output current sampling circuit that this utility model provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technical side in this utility model embodiment
Case is clearly and completely described, it is clear that described embodiment is only that this utility model part is real
Execute example rather than whole embodiments.Based on the embodiment in this utility model, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, broadly falls into this utility model
The scope of protection.
See Fig. 1, be the structured flowchart of the Vehicular charger output current sampling circuit that this utility model provides.
This Vehicular charger output current sampling circuit includes: include current collection circuit 10, differential amplification electricity
Road 20, signal follow circuit 30 and RC filter circuit 40, the outfan of described current collection circuit 10 with
The input of differential amplifier circuit 20 is electrically connected with, the outfan of described differential amplifier circuit 20 and signal with
It is electrically connected with the input of circuit 30, the outfan of described signal follow circuit 30 and RC filter circuit
The input of 40 is electrically connected with, and the magnitude of voltage that sampling converts is by delivering to voltage after RC filter circuit 40
At dsp chip.
Output current sample of the present utility model uses Hall current sensor, is sensed by Hall current
The electric current adopted is converted into voltage (Hall of 100A is 100A/4V) by device, then by differential amplification electricity
Voltage is reduced to-1.47V by road 20, is then passed through signal follow circuit 30 and voltage is risen to 1.47V, finally lead to
Delivering to after crossing RC filter circuit 40 at dsp chip, the magnitude of voltage that sampling converts is by RC filter circuit 40
After voltage is delivered to dsp chip, for RC value we typically go resistance to be 1K Ω, electric capacity is 1NF.
Concrete, as in figure 2 it is shown, current collection circuit of the present utility model 10 includes Hall current sensor,
First pin of Hall current sensor is connected with+15V voltage, the second pin of Hall current sensor with
-15V voltage is connected, after the 3rd pin of Hall current sensor is by the resistance R31 and resistance R32 of series connection
It is connected with the input of differential amplifier circuit, the 4th pin ground connection of Hall current sensor；And Hall
First pin of current sensor is passed by electric capacity C42 parallel with one another, electric capacity C45 ground connection, Hall current
Second pin of sensor is by electric capacity C47 parallel with one another, electric capacity C48 ground connection.
Wherein, differential amplifier circuit include operational amplifier UA, resistance R37, electric capacity C46, resistance R28,
Electric capacity C37 and electric capacity C39, described operational amplifier UA use operational amplifier TL082CDT, computing
The negative-phase input of amplifier UA is by resistance R28, electric capacity C37 parallel with one another and the outfan of self
Connect, the normal phase input end of operational amplifier UA pass through resistance R37 ground connection, operational amplifier UA just,
Negative power end connects+15V ,-15V voltage respectively, and the other end of resistance R37 is by electric capacity C46 and+15V
Voltage connects, and one end ground connection of electric capacity C39, the other end is connected with-15V voltage.Described resistance R37 and
It is 0603-100NF/50V that the resistance of resistance R28 is respectively 1K Ω and 4.7K Ω, electric capacity C46 and electric capacity C39
Electric capacity, electric capacity C37 is 0603-1NF/50V electric capacity.
Signal follow circuit includes operational amplifier UB, resistance R114 and resistance R115, described operation amplifier
The negative-phase input of device UB is connected with the outfan of described differential amplifier circuit by resistance R35 and is passed through electricity
The outfan of resistance R114 and operational amplifier UB connects, and the normal phase input end of operational amplifier UB connects electricity
Ground connection after resistance R115.Resistance R114, the resistance of resistance R115 are respectively 2K Ω and 1K Ω.
Described RC filter circuit includes resistance R33 and electric capacity C41, one end ground connection of electric capacity C41, another
End connects resistance R33, and wherein, the resistance of resistance R33 is 1K Ω, and electric capacity C41 is 0603-100NF/50V
Electric capacity.
When being embodied as, as being 40A by the electric current of Hall current sensor, the most now Hall current sensing
At 3 feet of device, voltage is U3=4*40/100=1.6V, and the voltage i.e. entering difference amplifier UA is 1.6V,
1 foot voltage after differential operational amplifier UA is U1=-1.6*4.7/5.1=-1.47V, the most now voltage
For-1.47V, it is enlarged into 1.47V, by a RC filter circuit through signal follow circuit 30 by-1.47
40 deliver to dsp chip after the 1.47V ripple of the amplification of sampling.
Finding car load serious interference through on-the-spot test, car load car body is exactly 24V, thus is produced by current sample
Raw interference, can produce the voltage disturbance of spike, thus be shown as 40A, warp actual current 30A when
Crossing eliminating is owing to PCB sample circuit layout is unreasonable, causes sampling to produce interference, or after software issue,
Find that filter capacity is inadequate through testing and verification step by step, the when of for 1NF electric capacity, RC filter cutoff
The formula of frequency is f=1/2 π RC, and the scope now filtered if increasing electric capacity is wider, and effect is more preferable, thus
Show consistent with actual current sampling, errorless through repeatedly certification.
Vehicular charger of the present utility model output current sampling circuit uses IGBT rectification+BUCK blood pressure lowering,
Use IGBT module encapsulation components and parts, avoid well owing to vibration causes device damage, realize well
Vehicle-mounted charge, export that electric current then uses samples for Hall current sensor, realizes output simply and easily
Electric current controls, and this utility model sampling precision is high, can effectively suppress the voltage disturbance of spike, strong interference immunity,
Need not debug, can preferably be applied to new forms of energy vehicle-mounted charge aspect.
The above is preferred implementation of the present utility model, it is noted that general for the art
For logical technical staff, on the premise of without departing from this utility model principle, it is also possible to make some improvement and
Deformation, these improve and deformation is also considered as protection domain of the present utility model.
Claims (6)
1. a Vehicular charger output current sampling circuit, it is characterized in that, including current collection circuit, differential amplifier circuit, signal follow circuit and RC filter circuit, the outfan of described current collection circuit is electrically connected with the input of differential amplifier circuit, the outfan of described differential amplifier circuit is electrically connected with the input of signal follow circuit, the outfan of described signal follow circuit is electrically connected with the input of RC filter circuit, and the magnitude of voltage that sampling converts is by delivering to voltage at dsp chip after RC filter circuit.
2. Vehicular charger output current sampling circuit as claimed in claim 1, it is characterized in that, described current collection circuit includes Hall current sensor, first pin of Hall current sensor is connected with+15V voltage, second pin of Hall current sensor is connected with-15V voltage, 3rd pin of Hall current sensor is connected with the input of differential amplifier circuit after resistance R31 and the resistance R32 by series connection, the 4th pin ground connection of Hall current sensor；And the first pin of Hall current sensor is by electric capacity C42 parallel with one another, electric capacity C45 ground connection, and the second pin of Hall current sensor is by electric capacity C47 parallel with one another, electric capacity C48 ground connection.
3. Vehicular charger output current sampling circuit as claimed in claim 1, it is characterized in that, described differential amplifier circuit includes operational amplifier UA, resistance R37, electric capacity C46, resistance R28, electric capacity C37 and electric capacity C39, the negative-phase input of operational amplifier UA is by resistance R28 parallel with one another, electric capacity C37 is connected with the outfan of self, the normal phase input end of operational amplifier UA passes through resistance R37 ground connection, operational amplifier UA is just, negative power end connects+15V respectively,-15V voltage, the other end of resistance R37 is connected by electric capacity C46 and+15V voltage, one end ground connection of electric capacity C39, the other end is connected with-15V voltage.
4. Vehicular charger output current sampling circuit as claimed in claim 1, it is characterized in that, described signal follow circuit includes operational amplifier UB, resistance R114 and resistance R115, the negative-phase input of described operational amplifier UB is connected with the outfan of described differential amplifier circuit by resistance R35 and passes through the outfan connection of resistance R114 and operational amplifier UB, and the normal phase input end of operational amplifier UB connects ground connection after resistance R115.
5. Vehicular charger output current sampling circuit as claimed in claim 1, it is characterised in that described RC filter circuit includes resistance R33 and electric capacity C41, one end ground connection of electric capacity C41, and the other end connects resistance R33.
6. Vehicular charger output current sampling circuit as claimed in claim 3, it is characterised in that described operational amplifier UA uses operational amplifier TL082CDT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620177424.XU CN205656227U (en) | 2016-03-08 | 2016-03-08 | On -vehicle motor output current sampling circuit that fills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620177424.XU CN205656227U (en) | 2016-03-08 | 2016-03-08 | On -vehicle motor output current sampling circuit that fills |
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| Publication Number | Publication Date |
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| CN205656227U true CN205656227U (en) | 2016-10-19 |
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| CN201620177424.XU Active CN205656227U (en) | 2016-03-08 | 2016-03-08 | On -vehicle motor output current sampling circuit that fills |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817376A (en) * | 2017-11-15 | 2018-03-20 | 武汉合康智能电气有限公司 | A kind of negative half period waveform blanking amplitude sampling apparatus |
| CN108362927A (en) * | 2018-03-14 | 2018-08-03 | 广东海明晖电子科技有限公司 | Active low-frequency current signal Detection ＆ Controling circuit |
| CN108539821A (en) * | 2018-04-28 | 2018-09-14 | 河南新太行电源股份有限公司 | A kind of power-supply management system and charging and discharging currents sample-taking calculating circuit |
| CN110133360A (en) * | 2019-03-25 | 2019-08-16 | 深圳开沃汽车有限公司 | Double AD channel AC electric machine phase current sample circuits |
| CN111426874A (en) * | 2020-05-25 | 2020-07-17 | 湖南科技大学 | Strong anti-interference wide-range alternating current permanent magnet synchronous motor current sampling circuit |
| CN111610359A (en) * | 2020-05-29 | 2020-09-01 | 上海挚达科技发展有限公司 | Filtering method for controlling voltage acquisition of guide circuit by charging pile |
| CN111913032A (en) * | 2020-07-09 | 2020-11-10 | 深圳市大地和电气股份有限公司 | Current acquisition integrated structure of new energy motor controller |
| CN113428096A (en) * | 2021-08-27 | 2021-09-24 | 武汉元丰汽车电控系统股份有限公司 | Data acquisition card, apparatus and method |
-
2016
- 2016-03-08 CN CN201620177424.XU patent/CN205656227U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817376A (en) * | 2017-11-15 | 2018-03-20 | 武汉合康智能电气有限公司 | A kind of negative half period waveform blanking amplitude sampling apparatus |
| CN107817376B (en) * | 2017-11-15 | 2023-09-05 | 武汉合智数字能源技术有限公司 | Negative half-cycle waveform blanking amplitude sampling device |
| CN108362927A (en) * | 2018-03-14 | 2018-08-03 | 广东海明晖电子科技有限公司 | Active low-frequency current signal Detection ＆ Controling circuit |
| CN108362927B (en) * | 2018-03-14 | 2024-05-07 | 广东海明晖电子科技有限公司 | Active low-frequency current signal detection and control circuit |
| CN108539821A (en) * | 2018-04-28 | 2018-09-14 | 河南新太行电源股份有限公司 | A kind of power-supply management system and charging and discharging currents sample-taking calculating circuit |
| CN110133360A (en) * | 2019-03-25 | 2019-08-16 | 深圳开沃汽车有限公司 | Double AD channel AC electric machine phase current sample circuits |
| CN111426874A (en) * | 2020-05-25 | 2020-07-17 | 湖南科技大学 | Strong anti-interference wide-range alternating current permanent magnet synchronous motor current sampling circuit |
| CN111610359A (en) * | 2020-05-29 | 2020-09-01 | 上海挚达科技发展有限公司 | Filtering method for controlling voltage acquisition of guide circuit by charging pile |
| CN111913032A (en) * | 2020-07-09 | 2020-11-10 | 深圳市大地和电气股份有限公司 | Current acquisition integrated structure of new energy motor controller |
| CN113428096A (en) * | 2021-08-27 | 2021-09-24 | 武汉元丰汽车电控系统股份有限公司 | Data acquisition card, apparatus and method |
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| GR01 | Patent grant |