CN106370429A - Novel engine loading tester for automobile engine testing platform - Google Patents
Novel engine loading tester for automobile engine testing platform Download PDFInfo
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- CN106370429A CN106370429A CN201611133786.XA CN201611133786A CN106370429A CN 106370429 A CN106370429 A CN 106370429A CN 201611133786 A CN201611133786 A CN 201611133786A CN 106370429 A CN106370429 A CN 106370429A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
Provided is a novel engine loading tester for an automobile engine testing platform and belongs to the technical field of engine testing. One end of a potentiometer is connected to the ground, the other end of the potentiometer is connected to one end of a first low power resistance and one end of a first capacitance respectively and simultaneously, the other end of the first low power resistance is connected to a first 24V DC power supply, the other end of the first capacitance is connected to the ground, the adjustment ends of the potentiometer are connected to one end of a second capacitance, one end of the first low power resistance and a same-phase input end of a first operational amplifier and a Vin, and the other end of the second capacitance and the other end of a second low power resistance are connected to the ground simultaneously. The invention provides the novel engine loading tester for the automobile engine testing platform, wherein loading current is continuously adjustable, can be manually controlled, and also can be connected to an engine platform to achieve automatic control, measurement and record for an analog input and an output channel; tester power supplies are all provided by the engine without being connected with an additional power supply, so use and operation are very convenient.
Description
Technical field
The present invention relates to a kind of car engine test stand frame electromotor load test device, belong to engine test technology
Field.
Background technology
Conventional electromotor loads test and generally requires just can complete on generator special performance test stand, with depot
And the increase of main engine factory items test demand, particularly nvh testing requirement, often on car load or block testing stand
Need on frame just can complete to test by certain current load by electromotor.And do not have engine pedestal special currently on the market
Electromotor loading equipemtn so that some tests of stand simply use switch high-power resistance switched over to realize rough
Load, loading current can not continuously adjust.Therefore, a kind of threst stand that can continuously adjust loading current of invention is used
Electromotor load test device is necessary, and can be to completing the various electromotors that increasingly increase or complete vehicle test project has
The effect of benefit.
Content of the invention
Present invention aim at proposing a kind of new automobile threst stand electromotor load test device, Ke Yishi
During existing engine rig test, electromotor is loaded, loading current continuously adjustabe is it is possible to defeated with test-bed analog quantity
Enter, export docking, realize automatically loading and measurement controls.
The present invention uses high-power igbt and amplifier to form constant voltage circuit, and load connects high-power resistance, realizes electromotor and add
Carry continuously adjustabe；The amplitude of input voltage range and output signal is standardized designing simultaneously, enables and electromotor
The analog input of test-bed, output channel docking, realize loading current and automatically control and surveying record.
Realize above-mentioned purpose, the technical scheme that the present invention takes is as follows:
A kind of new automobile threst stand electromotor load test device includes: the first small-power resistance r16, second little
Power resistor r17, the first electric capacity c1, the second electric capacity c2, potentiometer w1, the first operational amplifier ic1c and a 24v unidirectional current
Source it is characterised in that: described potentiometer w1 one end ground connection, the other end is simultaneously connected with the one of the first small-power resistance r16 respectively
End and one end of the first electric capacity c1, the other end of the first described small-power resistance r16 connects a 24v DC source, described
The first electric capacity c1 other end ground connection, the adjustment end of described potentiometer w1 connect respectively one end of the second electric capacity c2, second
One end of small-power resistance r17, the in-phase input end of the first operational amplifier ic1c and vin, described the second electric capacity c2's is another
The other end of one end and the second small-power resistance r17 is grounded simultaneously.
The present invention with respect to the beneficial effect of prior art is:
1st, loading current continuously adjustabe, manually controllable, also can access threst stand analog input, output channel in fact
Now automatically control, measure and record；
2nd, exerciser power supply is all provided by electromotor, is not required to access extra power supply, very convenient using operating.
Brief description
Fig. 1 is a kind of circuit structure of new automobile threst stand electromotor load test device of the present invention
Figure.
Wherein: the first small-power resistance r16, the second small-power resistance r17, the first electric capacity c1, the second electric capacity c2, potentiometer
W1, the first operational amplifier ic1c, a 24v DC source, the first high-power igbt pipe q1, the second high-power igbt pipe q2,
The third-largest power igbt pipe q3, the 3rd electric capacity c3, the 4th electric capacity c4, the first high-power resistance r1, the second high-power resistance r2,
Three high-power resistance r3, the fourth-largest power resistor r4, the fifth-largest power resistor r5, the sixth-largest power resistor r6, the seventh-largest power
Resistance r7, the eighth-largest power resistor r8, the ninth-largest power resistor r9, the tenth-largest power resistor r10, the 11st high-power resistance
R11, the 12nd high-power resistance r12, the 3rd small-power resistance r13, the 4th small-power resistance r14, the 5th small-power resistance
R15, the second operational amplifier ic1a, the 3rd operational amplifier ic1b, four-operational amplifier ic1d, the first Zener diode
D1, the second Zener diode d2, the 3rd Zener diode d3, the 2nd 24v DC source, -5v DC source, current sensor
meter.
Below in conjunction with the accompanying drawings technical scheme is further described, but is not limited thereto, every to this
Inventive technique scheme is modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention, all should cover
In protection scope of the present invention.
Specific embodiment
Specific embodiment one: illustrate with reference to Fig. 1, a kind of new automobile threst stand electromotor load test
Device, comprising: the first small-power resistance r16, the second small-power resistance r17, the first electric capacity c1, the second electric capacity c2, potentiometer w1,
One operational amplifier ic1c and a 24v DC source, described potentiometer w1 one end ground connection, the other end is simultaneously connected with the respectively
One end of one small-power resistance r16 and one end of the first electric capacity c1, the other end of described the first small-power resistance r16 connects the
One 24v DC source, the other end of the first described electric capacity c1 is grounded, and the adjustment end of described potentiometer w1 connects second respectively
One end of electric capacity c2, one end of the second small-power resistance r17, the in-phase input end of the first operational amplifier ic1c and vin, described
The other end of the second electric capacity c2 and the other end of the second small-power resistance r17 be grounded simultaneously.
Specific embodiment two: illustrate with reference to Fig. 1, a kind of new automobile engine test described in specific embodiment one
Stand electromotor load test device, described new automobile threst stand electromotor load test device also includes
One high-power igbt pipe q1, the second high-power igbt pipe q2, the third-largest power igbt pipe q3, the 3rd electric capacity c3, the 4th electric capacity c4,
First high-power resistance r1, the second high-power resistance r2, the third-largest power resistor r3, the fourth-largest power resistor r4, the fifth-largest work(
Rate resistance r5, the sixth-largest power resistor r6, the seventh-largest power resistor r7, the eighth-largest power resistor r8, the ninth-largest power resistor r9,
The tenth-largest power resistor r10, the 11st high-power resistance r11, the 12nd high-power resistance r12, the 3rd small-power resistance r13,
4th small-power resistance r14, the 5th small-power resistance r15, the second operational amplifier ic1a, the 3rd operational amplifier ic1b,
Four-operational amplifier ic1d, the first Zener diode d1, the second Zener diode d2, the 3rd Zener diode d3, the 2nd 24v are straight
Stream power supply and -5v DC source, the described inverting input of the first operational amplifier ic1c and outfan are simultaneously connected with second
Operational amplifier ic1a, the in-phase input end of the 3rd operational amplifier ic1b and four-operational amplifier ic1d, described second
The in-phase input end of operational amplifier ic1a is also simultaneously connected with one end of the 2nd 24v DC source and the 3rd electric capacity c3, described
The other end ground connection of the 3rd electric capacity c3, the inverting input of the second operational amplifier ic1a connects -5v DC source, the 4th electricity respectively
Hold one end of c4 and the positive pole of the 3rd Zener diode d3, the other end of the 4th described electric capacity c4 is grounded, the second operation amplifier
The outfan of device ic1a connects one end of the 5th small-power resistance r15, the other end and two of described the 5th small-power resistance r15
The negative pole of pole pipe d3 is simultaneously connected with the b pole of the third-largest power igbt pipe q3, and the c pole of described the third-largest power igbt pipe q3 is simultaneously
Connect the second high-power igbt pipe q2 and the c pole of the first high-power igbt pipe q1, the anti-phase input of the second operational amplifier ic1a
The e pole of end, the negative pole of the 3rd Zener diode d3 and the third-largest power igbt pipe q3 is simultaneously connected with the 11st high-power resistance
R11, the tenth-largest power resistor r10, one end of the ninth-largest power resistor r9 and the 12nd high-power resistance r12, the described tenth
One high-power resistance r11, the tenth-largest power resistor r10, the ninth-largest power resistor r9 and the 12nd high-power resistance r12 another
End is grounded simultaneously, and the outfan of the 3rd operational amplifier ic1b connects the second voltage stabilizing two respectively by the 4th small-power resistance r14
The anode of pole pipe d2 and the b pole of the second high-power igbt pipe q2, the inverting input of the 3rd operational amplifier ic1b, the second voltage stabilizing
The e pole of the negative electrode of diode d2 and the second high-power igbt pipe q2 is simultaneously connected with the seventh-largest power resistor r7, the sixth-largest power electricity
Resistance r6, one end of the fifth-largest power resistor r5 and the eighth-largest power resistor r8, described the seventh-largest power resistor r7, the sixth-largest work(
The other end of rate resistance r6, the fifth-largest power resistor r5 and the eighth-largest power resistor r8 is grounded simultaneously, four-operational amplifier
The outfan of ic1d connects the anode of the first Zener diode d1 and first high-power respectively by the 3rd small-power resistance r13
The b pole of igbt pipe q1, the inverting input of four-operational amplifier ic1d, the negative electrode of the first Zener diode d1 and the first big work(
The e pole of rate igbt pipe q1 is simultaneously connected with the third-largest power resistor r3, the second high-power resistance r2, the first high-power resistance r1 and
One end of four high-power resistance r4, described the third-largest power resistor r3, the second high-power resistance r2, the first high-power resistance r1
It is grounded with the other end of the fourth-largest power resistor r4 simultaneously.
Specific embodiment three: illustrate with reference to Fig. 1, a kind of new automobile engine test described in specific embodiment two
Stand electromotor load test device, described new automobile threst stand electromotor load test device also includes electricity
Flow sensor meter, one end of described current sensor meter igbt pipe q1 high-power with first, second high-power simultaneously
The c collection of igbt pipe q2 and the third-largest power igbt pipe q3 connects, and the other end is connected with electromotor positive pole (b+).
The induction range of current sensor meter is 0-100a.
Operation logic:
The main circuit of load test device is by the first high-power igbt pipe q1, the second high-power igbt pipe q2, the third-largest power igbt
The high-power igbt of pipe q3(tri- manages), the first high-power resistance r1, the second high-power resistance r2, the third-largest power resistor r3, the
Four high-power resistance r4, the fifth-largest power resistor r5, the sixth-largest power resistor r6, the seventh-largest power resistor r7, the eighth-largest power
Resistance r8, the ninth-largest power resistor r9, the tenth-largest power resistor r10, the 11st high-power resistance r11, the 12nd high-power electricity
Resistance r12(totally 12 high-power resistances), the current sensor (meter) of 1 0-100a and the first small-power resistance r16, second
Small-power resistance r17, the 3rd small-power resistance r13, the 4th small-power resistance r14 and the 5th small-power resistance r15(totally 5 little
Power resistor), the first electric capacity c1, the second electric capacity c2, the 3rd electric capacity c3 and the 4th electric capacity c4(totally 4 electric capacity), the first voltage stabilizing two
Pole pipe d1, the second Zener diode d2 and the 3rd Zener diode d3(totally 3 Zener diodes), 1 potentiometer w1 composition, press
Connect shown in accompanying drawing 1.Because the voltage of each high-power igbt pipe e pole is equal to vin(input voltage), as r=1 ω, (r is every
The resistance of individual high-power resistance), there is following relation between loading current i and vin:
I=10vin
Vin is set between 0-10v and continuously adjusts, load current just can consecutive variations, realization load between 0-100a
Electric current continuously adjustable purpose.Because the scope of vin is designed to the standard voltage signal of 0-10v, and current sensor output
It is the 4-20ma standard current signal of standard so that this loader both can use potentiometer w1 and intelligence instrument (outside instrument
Device) realize adjusting manually, also directly can be connected with the analog output of stand and input, realize adjust automatically, display and record.
Whole -5v and two group of+24v DC source needed for circuit is provided by three dc-dc modules, module input voltage
For 12v so that the exerciser power supply of the present invention is all provided by electromotor, it is not required to extra power supply.
A kind of new automobile threst stand electromotor load test device of the present invention, loading current continuously may be used
Adjust, manually controllable, also can access threst stand analog input, output channel is realized automatically controlling, measure and remember
Record；Exerciser power supply is all provided by electromotor, is not required to access extra power supply, very convenient using operating.
Claims (3)
1. a kind of new automobile threst stand electromotor load test device, comprising: the first small-power resistance (r16),
Second small-power resistance (r17), the first electric capacity (c1), the second electric capacity (c2), potentiometer (w1), the first operational amplifier (ic1c)
With a 24v DC source it is characterised in that: described potentiometer (w1) one end ground connection, the other end is simultaneously connected with first respectively
One end of small-power resistance (r16) and one end of the first electric capacity (c1), the other end of the first described small-power resistance (r16) connects
Connect a 24v DC source, the other end of described the first electric capacity (c1) is grounded, and the adjustment end of described potentiometer (w1) is distinguished
Connect one end of the second electric capacity (c2), one end of the second small-power resistance (r17), the first operational amplifier (ic1c) homophase defeated
Enter end and vin, the other end of the described other end of the second electric capacity (c2) and the second small-power resistance (r17) is grounded simultaneously.
2. a kind of new automobile threst stand electromotor load test device according to claim 1, its feature
It is: described new automobile threst stand electromotor load test device also includes the first high-power igbt pipe
(q1), the second high-power igbt pipe (q2), the third-largest power igbt pipe (q3), the 3rd electric capacity (c3), the 4th electric capacity (c4), first
High-power resistance (r1), the second high-power resistance (r2), the third-largest power resistor (r3), the fourth-largest power resistor (r4), the 5th
High-power resistance (r5), the sixth-largest power resistor (r6), the seventh-largest power resistor (r7), the eighth-largest power resistor (r8), the 9th
High-power resistance (r9), the tenth-largest power resistor (r10), the 11st high-power resistance (r11), the 12nd high-power resistance
(r12), the 3rd small-power resistance (r13), the 4th small-power resistance (r14), the 5th small-power resistance (r15), the second computing are put
Big device (ic1a), the 3rd operational amplifier (ic1b), four-operational amplifier (ic1d), the first Zener diode (d1), second
Zener diode (d2), the 3rd Zener diode (d3), the 2nd 24v DC source and -5v DC source, described the first computing
The inverting input of amplifier (ic1c) and outfan are simultaneously connected with the second operational amplifier (ic1a), the 3rd operational amplifier
(ic1b) and four-operational amplifier (ic1d) in-phase input end, the homophase input of described the second operational amplifier (ic1a)
End is also simultaneously connected with the 2nd 24v DC source and one end of the 3rd electric capacity (c3), another termination of described the 3rd electric capacity (c3)
Ground, the inverting input of the second operational amplifier (ic1a) connects -5v DC source, one end and the 3rd of the 4th electric capacity (c4) respectively
The positive pole of Zener diode (d3), the other end ground connection of described the 4th electric capacity (c4), the second operational amplifier (ic1a) defeated
Go out one end, the described other end of the 5th small-power resistance (r15) and the diode that end connects the 5th small-power resistance (r15)
(d3) negative pole is simultaneously connected with the b pole of the third-largest power igbt pipe (q3), and the c of described the third-largest power igbt pipe (q3) is extremely same
When connect the second high-power igbt pipe (q2) and the first high-power igbt and manage the c pole of (q1), the second operational amplifier (ic1a)
The e pole of inverting input, the negative pole of the 3rd Zener diode (d3) and the third-largest power igbt pipe (q3) is simultaneously connected with the 11st
High-power resistance (r11), the tenth-largest power resistor (r10), the ninth-largest power resistor (r9) and the 12nd high-power resistance (r12)
One end, described the 11st high-power resistance (r11), the tenth-largest power resistor (r10), the ninth-largest power resistor (r9) and
The other end of 12 high-power resistances (r12) is grounded simultaneously, and the outfan of the 3rd operational amplifier (ic1b) passes through the 4th little work(
Rate resistance (r14) connects the anode of the second Zener diode (d2) and the b pole of the second high-power igbt pipe (q2), the 3rd fortune respectively
Calculate the e of the inverting input, the negative electrode of the second Zener diode (d2) and the second high-power igbt pipe (q2) of amplifier (ic1b)
Pole is simultaneously connected with the seventh-largest power resistor (r7), the sixth-largest power resistor (r6), the fifth-largest power resistor (r5) and the eighth-largest work(
One end of rate resistance (r8), described the seventh-largest power resistor (r7), the sixth-largest power resistor (r6), the fifth-largest power resistor
(r5) it is grounded with the other end of the eighth-largest power resistor (r8), the outfan of four-operational amplifier (ic1d) passes through the 3rd simultaneously
Small-power resistance (r13) connects the anode of the first Zener diode (d1) and the b pole of the first high-power igbt pipe (q1) respectively, the
The inverting input of four-operational amplifier (ic1d), the negative electrode of the first Zener diode (d1) and the first high-power igbt manage (q1)
E pole be simultaneously connected with the third-largest power resistor (r3), the second high-power resistance (r2), the first high-power resistance (r1) and the fourth-largest
One end of power resistor (r4), described the third-largest power resistor (r3), the second high-power resistance (r2), the first high-power resistance
(r1) it is grounded with the other end of the fourth-largest power resistor (r4) simultaneously.
3. a kind of new automobile threst stand electromotor load test device according to claim 2, its feature
It is: described new automobile threst stand electromotor load test device also includes current sensor (meter), institute
The one end of the current sensor (meter) stated simultaneously igbt high-power with first pipe (q1), the second high-power igbt pipe (q2) and
The c collection of the third-largest power igbt pipe (q3) connects, and the other end is connected with electromotor positive pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611133786.XA CN106370429B (en) | 2016-12-10 | 2016-12-10 | A kind of car engine test stand frame generator load test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611133786.XA CN106370429B (en) | 2016-12-10 | 2016-12-10 | A kind of car engine test stand frame generator load test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106370429A true CN106370429A (en) | 2017-02-01 |
| CN106370429B CN106370429B (en) | 2018-07-13 |
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ID=57891872
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611133786.XA Active CN106370429B (en) | 2016-12-10 | 2016-12-10 | A kind of car engine test stand frame generator load test device |
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| CN (1) | CN106370429B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113227749A (en) * | 2018-08-01 | 2021-08-06 | 燃烧处理有限公司 | Synchronous real-time dynamometer and control system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4099067A (en) * | 1975-08-25 | 1978-07-04 | Caterpillar Tractor Co. | Load-shedding control for diesel-electric sets |
| US6194884B1 (en) * | 1999-11-23 | 2001-02-27 | Delphi Technologies, Inc. | Circuitry for maintaining a substantially constant sense current to load current ratio through an electrical load driving device |
| CN101777756A (en) * | 2009-12-25 | 2010-07-14 | 天津市诺尔电气有限公司 | Over-current protection circuit for insulated gate bipolar transistor |
| CN102130606A (en) * | 2011-01-21 | 2011-07-20 | 山西合创电力科技有限公司 | Multifunctional control device of wind power generator based on integrated gate commutated thyristor |
| CN102412550A (en) * | 2011-12-26 | 2012-04-11 | 川铁电气（天津）集团有限公司 | Adjustable current-limiting protection circuit on direct current loop |
| CN102510257A (en) * | 2011-11-09 | 2012-06-20 | 昆明理工大学 | Excitation current control system for automatically switching external characteristics of arc-welding generator |
| CN202373955U (en) * | 2011-12-26 | 2012-08-08 | 川铁电气（天津）集团有限公司 | Adjustable current limiting protective circuit in DC loop |
| CN202713220U (en) * | 2012-03-15 | 2013-01-30 | 戚墅堰机车车辆厂工业公司 | Internal combustion locomotive voltage regulator |
| CN206330755U (en) * | 2016-12-10 | 2017-07-14 | 哈尔滨东安汽车动力股份有限公司 | A kind of new automobile threst stand generator load test device |
-
2016
- 2016-12-10 CN CN201611133786.XA patent/CN106370429B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4099067A (en) * | 1975-08-25 | 1978-07-04 | Caterpillar Tractor Co. | Load-shedding control for diesel-electric sets |
| US6194884B1 (en) * | 1999-11-23 | 2001-02-27 | Delphi Technologies, Inc. | Circuitry for maintaining a substantially constant sense current to load current ratio through an electrical load driving device |
| CN101777756A (en) * | 2009-12-25 | 2010-07-14 | 天津市诺尔电气有限公司 | Over-current protection circuit for insulated gate bipolar transistor |
| CN102130606A (en) * | 2011-01-21 | 2011-07-20 | 山西合创电力科技有限公司 | Multifunctional control device of wind power generator based on integrated gate commutated thyristor |
| CN102510257A (en) * | 2011-11-09 | 2012-06-20 | 昆明理工大学 | Excitation current control system for automatically switching external characteristics of arc-welding generator |
| CN102412550A (en) * | 2011-12-26 | 2012-04-11 | 川铁电气（天津）集团有限公司 | Adjustable current-limiting protection circuit on direct current loop |
| CN202373955U (en) * | 2011-12-26 | 2012-08-08 | 川铁电气（天津）集团有限公司 | Adjustable current limiting protective circuit in DC loop |
| CN202713220U (en) * | 2012-03-15 | 2013-01-30 | 戚墅堰机车车辆厂工业公司 | Internal combustion locomotive voltage regulator |
| CN206330755U (en) * | 2016-12-10 | 2017-07-14 | 哈尔滨东安汽车动力股份有限公司 | A kind of new automobile threst stand generator load test device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113227749A (en) * | 2018-08-01 | 2021-08-06 | 燃烧处理有限公司 | Synchronous real-time dynamometer and control system |
| US11313297B2 (en) | 2018-08-01 | 2022-04-26 | Combustion Order Ltd | Synchronous real time dynamometer and control system |
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| Publication number | Publication date |
|---|---|
| CN106370429B (en) | 2018-07-13 |
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