CN103592065A - Method for detecting instantaneous output torque of diesel engine - Google Patents
Method for detecting instantaneous output torque of diesel engine Download PDFInfo
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- CN103592065A CN103592065A CN201310464251.0A CN201310464251A CN103592065A CN 103592065 A CN103592065 A CN 103592065A CN 201310464251 A CN201310464251 A CN 201310464251A CN 103592065 A CN103592065 A CN 103592065A
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- diesel engine
- generator
- phase
- instantaneous
- instantaneous output
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- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention discloses a method for detecting instantaneous output torque of a diesel engine, which is characterized by comprising the steps of detecting instantaneous three-phase phase voltage ua, ub, uc and three-phase phase current ia, ib, ic of a generator; calculating instantaneous output power Pe of the generator, wherein Pe=uaia+ubib+ucic; calculating instantaneous output power P of the diesel engine, wherein P=Pe/eta1; and calculating instantaneous torque T of the diesel engine, wherein T=9550*(P/N). According to the method disclosed by the invention, the instantaneous output power of the generator and the instantaneous torque of the diesel engine can be detected, thereby being capable of reflecting the current working states of the generator and the diesel engine more authentically and more accurately, and having very important significance for analyzing and controlling the operating states of the generator and the diesel engine.
Description
Technical field
The present invention relates to the instantaneous output torque of a kind of diesel engine detection method, belong to Diesel Engine Technique Field.
Background technology
It is the important content that diesel engine performance index detects that diesel engine output torque detects, and conventionally utilizes dynamometer to realize, and exchanges dynamometer and be exactly common a kind of.Utilize and exchange the scheme that dynamometer carries out diesel engine output torque detection, conventionally have following two kinds.
Scheme one:
Gather the phase voltage effective value U of generator phase
p, phase current effective value I
pand the phase differential of phase voltage and phase current
and according to formula
the output power of calculating generator, and then calculate the output torque of diesel engine.
Scheme two:
Gather the line voltage effective value U of generator two-phase
i, phase current effective value I
pand the phase differential of phase voltage and electric current
and according to formula
the output power of calculating generator, and then calculate the output torque of diesel engine.
Owing to there is hysteresis problem, the phase differential of certain phase voltage and electric current in the voltage effective value of generator and the detection of current effective value
sense cycle identical with the cycle of generator output voltage, therefore all there is hysteresis problem in above-mentioned two detected generated output powers of scheme and diesel engine output torque, especially, when generator output frequency is low, hysteresis situation is even more serious.Therefore the instantaneous output that such scheme all can not actual response generator, thus can not actual response go out the instantaneous torque of diesel engine.
Summary of the invention
Object of the present invention overcomes the deficiency of above-mentioned prior art exactly, and the instantaneous output torque of a kind of diesel engine detection method is provided.
The object of the present invention is achieved like this: the instantaneous output torque of a kind of diesel engine detection method, is characterized in that taking the following step:
B. detect the wink three-phase phase voltage u of generator
a, u
b, u
cwith three-phase phase current i
a, i
b, i
c;
B. calculating generator instantaneous output
The solution of the present invention, can detect the instantaneous torque of instantaneous output and the diesel engine of generator, the work at present state that reflects more truly, accurately generator and diesel engine, is of great significance the analysis of generator and diesel engine running status, control tool.
Accompanying drawing explanation
Fig. 1 is generator three-phase alternating current phase voltage and phase current waveform.
Fig. 2 is the instantaneous phase voltage waveform of generator.
Fig. 3 is the instantaneous phase current waveform of generator
Fig. 4 is the generator instantaneous output waveform detecting with instantaneous phase voltage and instantaneous phase current.
Fig. 5 is the instantaneous output torque of the diesel engine of embodiment of the present invention detection method FB(flow block).
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, for threephase alternator, at U
1u
2, V
1v
2, W
1w
2on three phase windings, show that frequency is identical, amplitude equates, the sinusoidal phase voltage of three-phase symmetrical of 120 ° of phase place mutual deviations, they are respectively u
a, u
b, u
c, and with u
afor with reference to sinusoidal quantity:
After generator band carries (establishing threephase load symmetry), due to each phase load impedance equate (be each phase of impedance mould | Z| and phasing degree
equate), and each phase voltage is symmetrical, so load phase current i
a, i
b, i
calso symmetrical, and with i
afor with reference to sinusoidal quantity:
To any time t, detect the three-phase phase voltage u of this moment generator
a, u
b, u
cwith three-phase phase current i
a, i
b, i
c(as the intersection point of Fig. 1 dotted line and three-phase alternating current phase voltage and three-phase alternating current phase current), and according to P
e=u
ai
a+ u
bi
b+ u
ci
ccalculating generator instantaneous output.
After MATLAB emulation, can verify, getting as stated above at any time generator phase voltage and phase current, to calculate resulting generator instantaneous power be constant, is expressed as a straight line (as shown in Figure 2,3, 4) with transverse axis in figure line.
Referring to Fig. 5, the instantaneous output torque of the diesel engine of the present embodiment detection method, from frame 1.0.
Enter frame 1.1, to any time t, detect the three-phase phase voltage u of this moment generator
a, u
b, u
cwith three-phase phase current i
a, i
b, i
c.
Enter frame 1.2, and calculating generator instantaneous output:
P
e=u
ai
a+u
bi
b+u
ci
c
Enter frame 1.3, calculating generator momentary efficiency:
Wherein:
QC=5.370748086E-03
QF=4.4866781369
QM=0.0089332456*N
2.00276
N: diesel engine speed, rpm
P: generated output power, w
I: generator output current, A
Enter frame 1.4, calculate diesel engine instantaneous output P:
Enter frame 1.5, calculate diesel engine instantaneous torque T:
Wherein: N is diesel engine speed.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (1)
1. the instantaneous output torque of a diesel engine detection method, is characterized in that taking the following step:
A. detect the wink three-phase phase voltage u of generator
a, u
b, u
cwith three-phase phase current i
a, i
b, i
c;
B. calculating generator instantaneous output P
e=u
ai
a+ u
bi
b+ u
ci
c;
Priority Applications (1)
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CN201310464251.0A CN103592065A (en) | 2013-10-08 | 2013-10-08 | Method for detecting instantaneous output torque of diesel engine |
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---|---|---|---|
CN201310464251.0A CN103592065A (en) | 2013-10-08 | 2013-10-08 | Method for detecting instantaneous output torque of diesel engine |
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Publication Number | Publication Date |
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CN103592065A true CN103592065A (en) | 2014-02-19 |
Family
ID=50082295
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104614107A (en) * | 2015-01-12 | 2015-05-13 | 江苏金陵自控技术有限公司 | Full-electronic motor torque real-time detection circuit |
CN109495043A (en) * | 2018-11-19 | 2019-03-19 | 苏州绿控传动科技股份有限公司 | A kind of new energy vehicle motor torque output method of real-time |
CN115877208A (en) * | 2023-02-24 | 2023-03-31 | 苏州成科自控设备有限公司 | Output torque measuring circuit and method of asynchronous motor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN86101150A (en) * | 1985-01-31 | 1986-10-15 | 西屋电气公司 | The torque that is used for induction motor control is determined |
US5087881A (en) * | 1988-09-19 | 1992-02-11 | Peacock David J H | Ic engine cylinder output power measurement apparatus by monitoring the output of an alternator driven by the engine |
JPH07225164A (en) * | 1994-02-10 | 1995-08-22 | Nippondenso Co Ltd | Rotary torque detector of ac motor |
CN201583368U (en) * | 2010-01-07 | 2010-09-15 | 南京科远自动化集团股份有限公司 | Torque measuring device of electric actuator |
CN102435364A (en) * | 2011-09-19 | 2012-05-02 | 上海理工大学 | Instantaneous energy-based soft sensing method of electric actuator torque |
-
2013
- 2013-10-08 CN CN201310464251.0A patent/CN103592065A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN86101150A (en) * | 1985-01-31 | 1986-10-15 | 西屋电气公司 | The torque that is used for induction motor control is determined |
US5087881A (en) * | 1988-09-19 | 1992-02-11 | Peacock David J H | Ic engine cylinder output power measurement apparatus by monitoring the output of an alternator driven by the engine |
JPH07225164A (en) * | 1994-02-10 | 1995-08-22 | Nippondenso Co Ltd | Rotary torque detector of ac motor |
CN201583368U (en) * | 2010-01-07 | 2010-09-15 | 南京科远自动化集团股份有限公司 | Torque measuring device of electric actuator |
CN102435364A (en) * | 2011-09-19 | 2012-05-02 | 上海理工大学 | Instantaneous energy-based soft sensing method of electric actuator torque |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104614107A (en) * | 2015-01-12 | 2015-05-13 | 江苏金陵自控技术有限公司 | Full-electronic motor torque real-time detection circuit |
CN104614107B (en) * | 2015-01-12 | 2017-12-12 | 江苏金陵自控技术有限公司 | A kind of full electronic motor torque real-time detection circuit |
CN109495043A (en) * | 2018-11-19 | 2019-03-19 | 苏州绿控传动科技股份有限公司 | A kind of new energy vehicle motor torque output method of real-time |
CN115877208A (en) * | 2023-02-24 | 2023-03-31 | 苏州成科自控设备有限公司 | Output torque measuring circuit and method of asynchronous motor |
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C53 | Correction of patent of invention or patent application | ||
CB03 | Change of inventor or designer information |
Inventor after: Xiao Hua Inventor after: Cai Zhiwei Inventor before: Nan Jinghong Inventor before: Wang Erwei Inventor before: Li Yu |
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Free format text: CORRECT: INVENTOR; FROM: NAN JINGHONG WANG ERWEI LI YU TO: XIAO HUA CAI ZHIWEI |
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Application publication date: 20140219 |