CN103792452A - Superimposed alternating voltage test tester for automobile low-voltage electric appliance - Google Patents
Superimposed alternating voltage test tester for automobile low-voltage electric appliance Download PDFInfo
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- CN103792452A CN103792452A CN201410043669.9A CN201410043669A CN103792452A CN 103792452 A CN103792452 A CN 103792452A CN 201410043669 A CN201410043669 A CN 201410043669A CN 103792452 A CN103792452 A CN 103792452A
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Abstract
The invention relates to a superimposed alternating voltage test tester for an automobile low-voltage electric appliance. The superimposed alternating voltage test tester comprises a signal generator, a direct-current stabilized power supply circuit, a signal superimposed circuit and a drive circuit. The direct-current stabilized power supply circuit is respectively connected with the signal superimposed circuit and the drive circuit. The signal superimposed circuit is connected with the signal generator. The drive circuit comprises an operational amplifier U1, a power tube Q1 and a resistor R4. The positive power supply end of the operational amplifier U1 and the drain electrode of the power tube Q1 are respectively connected with the direct-current stabilized power supply circuit, the non-inverting input end of the operational amplifier U1 is connected with the signal superimposed circuit, the output end of the operational amplifier U1 is connected with the grid electrode of the power tube Q1, and the source electrode of the power tube Q1 is connected with the ground through the resistor R4. The source electrode of the power tube Q1 and the connection point of the resistor R4 are connected with the inverting input end of the operational amplifier U1, and the negative power supply end of the operational amplifier U1 is connected with the ground. The superimposed alternating voltage test tester has the function of testing the superimposed alternating voltage of the automobile low-voltage electric appliance according to the ISO-16750 standard and is simple, practical and low in cost.
Description
Technical field
The present invention relates to Automobile Measuring Techniques, be specifically related to a kind of automobile low-voltage electrical appliance stack AC voltage test tester.
Background technology
Automobile low-voltage electrical appliance testing standard is verified with reference to " ISO-16750Roadvehicles-Environmentalconditionsandtestingf orelectricalandelectronicequipment " (hereinafter to be referred as ISO-16750 standard) substantially at present, in this standard " Part2-ElectricalLoads ", require the automobile-used low-voltage electrical appliance AC voltage test that superposes, functional status when checking residual alternating voltage in its supply voltage, and current domestic most testing agencies there is no corresponding testing tool, or detecting instrument involves great expense, experimentation cost is higher.
Summary of the invention
The object of this invention is to provide a kind of automobile low-voltage electrical appliance stack AC voltage test tester, it possesses the function of ISO-16750 standard to automobile low-voltage electrical appliance stack AC voltage test, and simple and practical, and cost is low.
Automobile low-voltage electrical appliance stack AC voltage test tester of the present invention, comprises signal generator, DC-stabilized circuit, superimposed signal circuit and driving circuit;
Described signal generator is for generation of sinusoidal ac signal;
Described DC-stabilized circuit is connected with superimposed signal circuit and driving circuit respectively, for described sinusoidal ac signal provides DC offset voltage, simultaneously for driving circuit provides voltage;
Described superimposed signal circuit is connected with signal generator, for described sinusoidal ac signal and DC offset voltage are superposeed;
Described driving circuit comprises amplifier U1, power tube Q1 and resistance R 4, the drain electrode of the positive power source terminal of amplifier U1 and power tube Q1 is connected with DC-stabilized circuit respectively, the in-phase input end of amplifier U1 is connected with superimposed signal circuit, the output terminal of amplifier U1 is connected with the grid of power tube Q1, the source electrode of power tube Q1 is through resistance R 4 ground connection, the tie point of the source electrode of power tube Q1 and resistance R 4 is connected with the inverting input of amplifier U1, the negative power end ground connection of amplifier U1.
Described superimposed signal circuit comprises capacitor C 1 and resistance R 1, one end of capacitor C 1 is connected with signal generator, the other end of capacitor C 1 is connected with described DC-stabilized circuit through resistance R 1, and the tie point of capacitor C 1 and resistance R 1 is connected with the in-phase input end of amplifier U1.
Described DC-stabilized circuit comprises D.C. regulated power supply, adjustable resistance RV1 and resistance R 2, and described D.C. regulated power supply is successively through adjustable resistance RV1, resistance R 2 ground connection, and the tie point of adjustable resistance RV1 and resistance R 2 is connected with superimposed signal circuit.
Described driving circuit also comprises diode D2, protective tube FS and resistance R 3, the positive pole of diode D2 is connected with D.C. regulated power supply, the negative pole of diode D2 is connected with the drain electrode of power tube Q1 through protective tube FS, and the tie point of the negative pole of diode D2 and protective tube FS is connected with the positive power source terminal of amplifier U1, one end of described resistance R 3 is connected with the output terminal of amplifier U1, and the other end of resistance R 3 is connected with the grid of power tube Q1.
The model of described amplifier U1 is UA741, and the model of power tube Q1 is IRF540.
Described power tube Q1 is fixed on heat radiator, and dispels the heat by fan.
Described signal generator adopts Tyke AFG3011, and sinusoidal ac signal amplitude is set to 2V, and frequency range is 50～20000Hz.
Automobile low-voltage electrical appliance stack AC voltage test tester of the present invention possesses following functions:
(1) VD scope is not less than 6V～18V;
(2) stack sinusoidal voltage peak-to-peak value is not less than 2V, frequency range 50Hz～20000Hz, log scan mode;
(3) output internal resistance is in 50m Ω～100m Ω;
(4) load capacity is greater than 5A.
In sum, the present invention possesses the function of ISO-16750 standard to automobile low-voltage electrical appliance stack AC voltage test, and this tester is simple and practical, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of automobile low-voltage electrical appliance stack AC voltage test tester of the present invention.
Embodiment
Now by reference to the accompanying drawings the present invention is described in further detail:
Automobile low-voltage electrical appliance stack AC voltage test tester as shown in Figure 1, comprises signal generator 1, DC-stabilized circuit, superimposed signal circuit 2 and driving circuit 4.
Described signal generator 1 is for generation of sinusoidal ac signal, and its amplitude and frequency are adjustable continuously within the scope of ISO-16750 standard-required, and can export in log scan mode; In the present embodiment, signal generator adopts Tyke AFG3011, and AC signal amplitude is set to 2V, and frequency range is 50Hz～20000Hz.
Described DC-stabilized circuit comprises D.C. regulated power supply 3, adjustable resistance RV1 and resistance R 2, D.C. regulated power supply is successively through adjustable resistance RV1, resistance R 2 ground connection, the tie point of adjustable resistance RV1 and resistance R 2 is connected with superimposed signal circuit, D.C. regulated power supply 3 is after adjustable resistance RV1 dividing potential drop, for described sinusoidal ac signal provides DC offset voltage, wherein, the output voltage of D.C. regulated power supply 3 is set to 30V, the resistance of adjustable resistance RV1 is 1k Ω, the resistance of resistance R 2 is 100 Ω, the DC offset voltage scope of the voltage that D.C. regulated power supply 3 is exported after adjustable resistance RV1 dividing potential drop is 2.7V～30V, meet the functional requirement that VD scope is not less than 6V～18V.
Described superimposed signal circuit 2 comprises capacitor C 1 and resistance R 1, one end of capacitor C 1 is connected with signal generator 1, the other end of capacitor C 1 is connected with the tie point of adjustable resistance RV1 and resistance R 2 through resistance R 1, for described sinusoidal ac signal and DC offset voltage are superposeed; The tie point of described capacitor C 1 and resistance R 1 is connected with driving circuit 4.Capacitor C 1 plays every straight effect, forms RC Hi-pass filter with resistance R 1 simultaneously.Capacitor C 1 in the present embodiment is 1uf ceramic disc capacitor, and the resistance of resistance R 1 is 10k Ω, according to RC circuit cutoff frequency computing formula:
f
L=1/(2πR
1C
1)≈16HZ
The ac voltage signal frequency initial value of stack is 50Hz, and after RC Hi-pass filter, ac voltage signal amplitude maximum attenuation rate is
be about 0.1V, ISO-16750 standard requires as ± 0.2V voltage error, and therefore ac voltage signal meets the demands because of the error that amplitude attenuation causes.
Described driving circuit comprises amplifier (that is: operational amplifier) U1, power tube Q1, resistance R 4, diode D2, protective tube FS and resistance R 3, and wherein, the model of amplifier U1 is UA741.The positive power source terminal (i.e. 7 pin) of amplifier U1 is connected with the negative pole of diode D2, the positive pole of diode D2 is connected with D.C. regulated power supply 3, D.C. regulated power supply 3 provides voltage for amplifier U1, the negative pole of diode D2 is also connected with the drain electrode of power tube Q1 through protective tube FS, D.C. regulated power supply 3 provides voltage for power tube Q1, diode D2 plays reverse connecting protection effect, the in-phase input end (i.e. 3 pin) of amplifier U1 is connected with the capacitor C 1 in superimposed signal circuit 2 and the tie point of resistance R 1, sinusoidal ac signal and DC offset voltage are input to the in-phase input end of amplifier U1 after stack, the output terminal (i.e. 6 pin) of amplifier U1 is connected with the grid of power tube Q1 through resistance R 3, carry out the output voltage of power tube Q1 by the grid voltage of regulating power pipe Q1, the source electrode of power tube Q1 is through resistance R 4 ground connection, and the tie point of the source electrode of power tube Q1 and resistance R 4 is connected with the inverting input of amplifier U1 (i.e. 2 pin), resistance R 4 is the inverting input to amplifier U1 by the output voltage Real-time Feedback of power tube Q1, thereby formation closed-loop control, negative power end (the i.e. 4 pin) ground connection of amplifier U1.According to the short characteristic of the void of amplifier U1, for the voltage of inverting input and the voltage of its in-phase input end that keep amplifier U1 equate, the grid voltage of the real-time Modulating Power pipe of amplifier U1 Q1, thereby the output voltage of power ratio control pipe Q1 (voltage that is the inverting input of amplifier U1 keeps consistent with the voltage of in-phase input end), has realized the driving force of the ac voltage signal that superposes.
The model of the Q1 of power tube described in the present embodiment is IRF540, its DS end maximum voltage 100V, conducting internal resistance is about 50～77m Ω, meet the functional requirement of tester output internal resistance in 50～120m Ω, maximum load current is 30A, for guaranteed output pipe Q1 reliable operation, require load current to be no more than 5A, protective tube FS is used for limiting load current, to avoid the excessive power tube Q1 that burns of electric current, be the good heat radiating of guaranteed output pipe Q1 simultaneously, power tube Q1 is fixed on heat radiator, and use fan to dispel the heat.Grid-source electrode forward voltage of power tube Q1 is 4V, be 19V for making power tube Q1 output voltage maximal value reach 19V(direct current biasing maximum voltage maximal value after stack exchanges), the output terminal maximum voltage of amplifier U1 should be not less than 23V, be that selected amplifier U1 operating voltage should be greater than 23V, so amplifier U1 uses UA741 in the present embodiment, its single power supply voltage is 44V to the maximum, the output voltage that is D.C. regulated power supply 3 should be arranged within the scope of 23V～44V, so the output voltage of D.C. regulated power supply 3 is set to 30V in the present embodiment.
Claims (7)
1. an automobile low-voltage electrical appliance stack AC voltage test tester, is characterized in that: comprise signal generator (1), DC-stabilized circuit, superimposed signal circuit (2) and driving circuit (4);
Described signal generator (1) is for generation of sinusoidal ac signal;
Described DC-stabilized circuit is connected with superimposed signal circuit (2) and driving circuit (4) respectively, for described sinusoidal ac signal provides DC offset voltage, provides voltage for driving circuit (4) simultaneously;
Described superimposed signal circuit (2) is connected with signal generator (1), for described sinusoidal ac signal and DC offset voltage are superposeed;
Described driving circuit (4) comprises amplifier U1, power tube Q1 and resistance R 4, the drain electrode of the positive power source terminal of amplifier U1 and power tube Q1 is connected with DC-stabilized circuit respectively, the in-phase input end of amplifier U1 is connected with superimposed signal circuit (2), the output terminal of amplifier U1 is connected with the grid of power tube Q1, the source electrode of power tube Q1 is through resistance R 4 ground connection, the tie point of the source electrode of power tube Q1 and resistance R 4 is connected with the inverting input of amplifier U1, the negative power end ground connection of amplifier U1.
2. automobile low-voltage electrical appliance stack AC voltage test tester according to claim 1, it is characterized in that: described superimposed signal circuit (2) comprises capacitor C 1 and resistance R 1, one end of capacitor C 1 is connected with signal generator (1), the other end of capacitor C 1 is connected with described DC-stabilized circuit through resistance R 1, and the tie point of capacitor C 1 and resistance R 1 is connected with the in-phase input end of amplifier U1.
3. automobile low-voltage electrical appliance stack AC voltage test tester according to claim 1, it is characterized in that: described DC-stabilized circuit comprises D.C. regulated power supply (3), adjustable resistance RV1 and resistance R 2, described D.C. regulated power supply (3) is successively through adjustable resistance RV1, resistance R 2 ground connection, and the tie point of adjustable resistance RV1 and resistance R 2 is connected with superimposed signal circuit (2).
4. automobile low-voltage electrical appliance stack AC voltage test tester according to claim 3, it is characterized in that: described driving circuit (4) also comprises diode D2, protective tube FS and resistance R 3, the positive pole of diode D2 is connected with D.C. regulated power supply (3), the negative pole of diode D2 is connected with the drain electrode of power tube Q1 through protective tube FS, and the tie point of the negative pole of diode D2 and protective tube FS is connected with the positive power source terminal of amplifier U1, one end of described resistance R 3 is connected with the output terminal of amplifier U1, and the other end of resistance R 3 is connected with the grid of power tube Q1.
5. according to the arbitrary described automobile low-voltage electrical appliance stack of claim 1 to 4 AC voltage test tester, it is characterized in that: the model of described amplifier U1 is UA741, the model of power tube Q1 is IRF540.
6. according to the arbitrary described automobile low-voltage electrical appliance stack of claim 1 to 4 AC voltage test tester, it is characterized in that: described power tube Q1 is fixed on heat radiator, and dispels the heat by fan.
7. according to the arbitrary described automobile low-voltage electrical appliance stack of claim 1 to 4 AC voltage test tester, it is characterized in that: described signal generator (1) adopts Tyke AFG3011, sinusoidal ac signal amplitude is set to 2V, and frequency range is 50～20000Hz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043669.9A CN103792452A (en) | 2014-01-29 | 2014-01-29 | Superimposed alternating voltage test tester for automobile low-voltage electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043669.9A CN103792452A (en) | 2014-01-29 | 2014-01-29 | Superimposed alternating voltage test tester for automobile low-voltage electric appliance |
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| CN103792452A true CN103792452A (en) | 2014-05-14 |
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| CN201410043669.9A Pending CN103792452A (en) | 2014-01-29 | 2014-01-29 | Superimposed alternating voltage test tester for automobile low-voltage electric appliance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751604A (en) * | 2020-07-01 | 2020-10-09 | 国网江苏省电力有限公司营销服务中心 | Steady-state test method and system for transient voltage overshoot value of direct-current voltage divider |
| CN113075431A (en) * | 2021-03-19 | 2021-07-06 | 常州同惠电子股份有限公司 | Signal source generating circuit and signal source generating method for alternating current impedance test |
| CN115389797A (en) * | 2022-08-29 | 2022-11-25 | 北京东方计量测试研究所 | Alternating current-direct current superposed voltage source for spacecraft direct current load input impedance measurement |
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| JPS5512401A (en) * | 1978-07-12 | 1980-01-29 | Nippon Kokan Kk <Nkk> | Eddy current type range finder |
| US4714912A (en) * | 1986-12-31 | 1987-12-22 | General Electric Company | Single-conductor power line communications system |
| CN2662529Y (en) * | 2003-08-26 | 2004-12-08 | 中国科学院电工研究所 | A positively exciting constant current source |
| CN1602590A (en) * | 2000-09-21 | 2005-03-30 | 互达奇照明系统公司 | Power line communication circuit |
| CN202309498U (en) * | 2011-09-21 | 2012-07-04 | 广东电网公司电力科学研究院 | High-precision intelligent ripple-superposed DC output circuit |
| CN103472293A (en) * | 2013-09-10 | 2013-12-25 | 国家电网公司 | Device for detecting whether alternating currents flow into direct-current system or not |
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2014
- 2014-01-29 CN CN201410043669.9A patent/CN103792452A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5512401A (en) * | 1978-07-12 | 1980-01-29 | Nippon Kokan Kk <Nkk> | Eddy current type range finder |
| US4714912A (en) * | 1986-12-31 | 1987-12-22 | General Electric Company | Single-conductor power line communications system |
| CN1602590A (en) * | 2000-09-21 | 2005-03-30 | 互达奇照明系统公司 | Power line communication circuit |
| CN2662529Y (en) * | 2003-08-26 | 2004-12-08 | 中国科学院电工研究所 | A positively exciting constant current source |
| CN202309498U (en) * | 2011-09-21 | 2012-07-04 | 广东电网公司电力科学研究院 | High-precision intelligent ripple-superposed DC output circuit |
| CN103472293A (en) * | 2013-09-10 | 2013-12-25 | 国家电网公司 | Device for detecting whether alternating currents flow into direct-current system or not |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751604A (en) * | 2020-07-01 | 2020-10-09 | 国网江苏省电力有限公司营销服务中心 | Steady-state test method and system for transient voltage overshoot value of direct-current voltage divider |
| CN111751604B (en) * | 2020-07-01 | 2022-12-13 | 国网江苏省电力有限公司营销服务中心 | Steady-state test method and system for transient voltage overshoot value of direct-current voltage divider |
| CN113075431A (en) * | 2021-03-19 | 2021-07-06 | 常州同惠电子股份有限公司 | Signal source generating circuit and signal source generating method for alternating current impedance test |
| CN113075431B (en) * | 2021-03-19 | 2023-01-06 | 常州同惠电子股份有限公司 | Signal source generating circuit and signal source generating method for alternating current impedance test |
| CN115389797A (en) * | 2022-08-29 | 2022-11-25 | 北京东方计量测试研究所 | Alternating current-direct current superposed voltage source for spacecraft direct current load input impedance measurement |
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Application publication date: 20140514 |
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