CN103383406A - High voltage sampling circuit in electric driving controller of electromobile - Google Patents
High voltage sampling circuit in electric driving controller of electromobile Download PDFInfo
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- CN103383406A CN103383406A CN2013103447192A CN201310344719A CN103383406A CN 103383406 A CN103383406 A CN 103383406A CN 2013103447192 A CN2013103447192 A CN 2013103447192A CN 201310344719 A CN201310344719 A CN 201310344719A CN 103383406 A CN103383406 A CN 103383406A
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Abstract
The invention discloses a high voltage sampling circuit in an electric driving controller of an electromobile. The high voltage sampling circuit is characterized by comprising a voltage stabilization circuit, a voltage sampling circuit and a differential circuit, wherein the voltage stabilization circuit is used for providing linear optocoupler primary side power supply voltage VDD, the voltage sampling circuit is used for dividing high voltage to obtain voltage detection signals and transmitting the voltage detection signals to the input end of the linear optocoupler through RC filtering, and the differential circuit is used for outputting output end voltage of the linear optocoupler by obtaining set gain through operating of the differential circuit and transmitting the voltage to a following digital signal process (DSP) master control chip through the RC filtering. The high voltage sampling circuit is used for randomly monitoring the state of high voltage, and can ensure safety of users by totally isolating a high voltage end and a low voltage end.
Description
Technical field
The present invention relates to a kind of high tension voltage sample circuit that is applied in electric automobile electricity driving governor.
Background technology
In electric vehicle controller, main control chip DSP needs the Real-Time Monitoring high tension voltage, might damage power device if high tension voltage is too high, can not make the normal operation of electric automobile electricity driving governor system if high tension voltage is too low, may damage other parts of car load.But, there is no so far the open report about electric automobile electricity driving governor mesohigh voltage sampling circuit.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, a kind of electric automobile electricity driving governor mesohigh voltage sampling circuit is provided, to the Real-Time Monitoring high tension voltage, and then the various situations of high tension voltage being taked different measures.
The present invention adopts following scheme for solving above technical matters:
The characteristics of electric automobile electricity driving governor mesohigh voltage sampling circuit of the present invention are to comprise:
One mu balanced circuit is used for providing linear optical coupling former limit supply voltage VDD;
One voltage sampling circuit is high tension voltage to be carried out dividing potential drop obtain voltage detection signal, sends into the linear optical coupling input end by RC filtering;
One difference channel is that the linear optical coupling output end voltage is exported by the gain that the amplifier difference channel obtains to arrange, and transfers to follow-up DSP main control chip after RC filtering.
The characteristics of electric automobile electricity driving governor mesohigh voltage sampling circuit of the present invention also are:
Described mu balanced circuit is comprised of three terminal regulator U3 and capacitor C 2, capacitor C 8, capacitor C 9, capacitor C 10 and capacitor C 11, with the former limit supply voltage VDD of stable output voltage as linear optical coupling U1;
Described voltage sampling circuit is with the dividing potential drop of high tension voltage through resistance R 1 and resistance R 2, then after resistance R 3 and capacitor C 1 filtering, with the input end VIN of voltage sampling signal access linear optical coupling U1;
Described difference channel is that the both-end output signal of linear optical coupling U1 is exported through the single-ended gain of amplifier U2 acquisition, and described single-ended gain output is by transferring to follow-up DSP main control chip after resistance R 8 and capacitor C 7 filtering;
In the defeated end of forward, reverse input end and the backfeed loop of amplifier U2, resistance R 4, resistance R 5, resistance R 6 and resistance R 7 are set respectively in described difference road, are used for adjusting the difference channel yield value.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The present invention can Real-Time Monitoring high tension voltage state, and high-pressure side and low pressure end are realized isolation fully, guarantees user's safety.
Description of drawings
Fig. 1 is sample circuit schematic diagram in the present invention;
Fig. 2 is difference channel schematic diagram in the present invention;
Fig. 3 is mu balanced circuit schematic diagram in the present invention.
Embodiment
In the present embodiment, electric automobile electricity driving governor mesohigh voltage sampling circuit comprises mu balanced circuit, voltage sampling circuit and difference channel.
As shown in Figure 3, mu balanced circuit is used for providing linear optical coupling former limit supply voltage VDD.
As shown in Figure 1, voltage sampling circuit is high tension voltage to be carried out dividing potential drop obtain voltage detection signal, sends into the linear optical coupling input end by RC filtering.
As shown in Figure 2, difference channel is that the linear optical coupling output end voltage is exported by the gain that the amplifier difference channel obtains to arrange, and transfers to follow-up DSP main control chip after RC filtering.
In concrete enforcement, as Fig. 1, Fig. 2 and shown in Figure 3, mu balanced circuit is comprised of three terminal regulator U3 and capacitor C 2, capacitor C 8, capacitor C 9, capacitor C 10 and capacitor C 11, with the former limit supply voltage VDD of stable output voltage as linear optical coupling U1; Voltage sampling circuit is with the dividing potential drop of high tension voltage through resistance R 1 and resistance R 2, then after resistance R 3 and capacitor C 1 filtering, with the input end VIN of voltage sampling signal access linear optical coupling U1; Difference channel is that the both-end output signal of linear optical coupling U1 is exported through the single-ended gain of amplifier U2 acquisition, and described single-ended gain output is by transferring to follow-up DSP main control chip after resistance R 8 and capacitor C 7 filtering; Resistance R 4, resistance R 5, resistance R 6 and resistance R 7 are set respectively in the defeated end of the forward of amplifier U2, reverse input end and backfeed loop in the difference road, are used for adjusting the difference channel yield value.Corresponding connections of A end in Fig. 1 and Fig. 2, the connection of B end correspondence.
In the present embodiment, voltage with 15V voltage by the mu balanced circuit stable output that is made of three terminal regulator U3 and capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11 and capacitor C 2 is as the former limit supply voltage of linear optical coupling U1, for bleeder circuit provides stable reference power source.
Sample circuit obtains suitable magnitude of voltage with high tension voltage through resistance R 1 and resistance R 2 dividing potential drops, because power device is on off state always, high tension voltage can carry the high frequency clutter, need through obtaining clean voltage signal after resistance R 3 and capacitor C 1 filtering, the parameter by adjusting resistance R3 and capacitor C 1 obtains suitable frequency filtering.
Difference channel becomes the both-end output voltage of linear optical coupling U1 into Single-end output by difference amplifier U2, parameter by adjusting resistance R4, resistance R 5, resistance R 6, resistance R 7 and capacitor C 4 and capacitor C 6, to obtain suitable gain, make the output voltage of amplifier U2 in the AD of main control chip DSP mouth voltage range, by adjusting resistance R8 and capacitor C 7 parameters, obtain suitable frequency filtering, the linear optical coupling output voltage is carried out filtering.
Claims (3)
1. electric automobile electricity driving governor mesohigh voltage sampling circuit is characterized in that comprising:
One mu balanced circuit is used for providing linear optical coupling former limit supply voltage VDD;
One voltage sampling circuit is high tension voltage to be carried out dividing potential drop obtain voltage detection signal, sends into the linear optical coupling input end by RC filtering;
One difference channel is that the linear optical coupling output end voltage is exported by the gain that the amplifier difference channel obtains to arrange, and transfers to follow-up DSP main control chip after RC filtering.
2. electric automobile according to claim 1 electricity driving governor mesohigh voltage sampling circuit is characterized in that:
Described mu balanced circuit is comprised of three terminal regulator U3 and capacitor C 2, capacitor C 8, capacitor C 9, capacitor C 10 and capacitor C 11, with the former limit supply voltage VDD of stable output voltage as linear optical coupling U1;
Described voltage sampling circuit is with the dividing potential drop of high tension voltage through resistance R 1 and resistance R 2, then after resistance R 3 and capacitor C 1 filtering, with the input end VIN of voltage sampling signal access linear optical coupling U1;
Described difference channel is that the both-end output signal of linear optical coupling U1 is exported through the single-ended gain of amplifier U2 acquisition, and described single-ended gain output is by transferring to follow-up DSP main control chip after resistance R 8 and capacitor C 7 filtering.
3. electric automobile according to claim 1 electricity driving governor mesohigh voltage sampling circuit, it is characterized in that: in the defeated end of forward, reverse input end and the backfeed loop of amplifier U2, resistance R 4, resistance R 5, resistance R 6 and resistance R 7 are set respectively in described difference road, are used for adjusting the difference channel yield value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103447192A CN103383406A (en) | 2013-08-08 | 2013-08-08 | High voltage sampling circuit in electric driving controller of electromobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103447192A CN103383406A (en) | 2013-08-08 | 2013-08-08 | High voltage sampling circuit in electric driving controller of electromobile |
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| CN103383406A true CN103383406A (en) | 2013-11-06 |
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| CN2013103447192A Pending CN103383406A (en) | 2013-08-08 | 2013-08-08 | High voltage sampling circuit in electric driving controller of electromobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333408A (en) * | 2017-12-07 | 2018-07-27 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group series connection total voltage Acquisition Circuit |
| CN109031061A (en) * | 2018-07-10 | 2018-12-18 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group insulation detecting circuit |
| CN111830423A (en) * | 2020-06-24 | 2020-10-27 | 东风电驱动系统有限公司 | Isolated high-voltage sampling circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203350339U (en) * | 2013-08-08 | 2013-12-18 | 安徽巨一自动化装备有限公司 | HV voltage sampling circuit for electrically-driven controller of electric vehicle |
-
2013
- 2013-08-08 CN CN2013103447192A patent/CN103383406A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203350339U (en) * | 2013-08-08 | 2013-12-18 | 安徽巨一自动化装备有限公司 | HV voltage sampling circuit for electrically-driven controller of electric vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 佚名: "变频器电压电流典型检测方法", 《互联网》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333408A (en) * | 2017-12-07 | 2018-07-27 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group series connection total voltage Acquisition Circuit |
| CN109031061A (en) * | 2018-07-10 | 2018-12-18 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group insulation detecting circuit |
| CN111830423A (en) * | 2020-06-24 | 2020-10-27 | 东风电驱动系统有限公司 | Isolated high-voltage sampling circuit |
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Application publication date: 20131106 |