CN102194034B - Electromagnetic valve temperature rise computational analysis method - Google Patents
Electromagnetic valve temperature rise computational analysis method Download PDFInfo
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- CN102194034B CN102194034B CN2011101773338A CN201110177333A CN102194034B CN 102194034 B CN102194034 B CN 102194034B CN 2011101773338 A CN2011101773338 A CN 2011101773338A CN 201110177333 A CN201110177333 A CN 201110177333A CN 102194034 B CN102194034 B CN 102194034B
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Abstract
The invention relates to an electromagnetic valve temperature rise computational analysis method which comprises the following steps: 1, establishing an electromagnetic field model and a temperature field model; supposing that the initial temperature of an electromagnetic valve is an environmental temperature T0, and the predetermined temperature T1 of a coil is equal to T0; 2, computing the resistivity of the coil at T1; 3, computing the loss of the coil, a magnetizer, a movable iron core and a static iron core based on the electromagnetic field model; 4, exerting the computed loss of each part of the electromagnetic valve on the temperature field module as a load to obtain the temperature rise of each part of the electromagnetic value and the actual temperature T2 of the coil; and 5, judging whether a difference between the T2 and the T2 is less than a minimum value, if so, ending the computation; otherwise, enabling the T1 to be equal to the T2, then returning to the step 2 to re-compute, iterating until the difference between the computed actual temperature T2 of the coil and the predetermined temperature T2 of the coil is less than the minimum value, thereby obtaining the stable temperature of the coil. The electromagnetic valve temperature rise computational analysis method can be used for accurately computing and analyzing the temperature rise of the electromagnetic valve in a work state.
Description
Technical field
The present invention relates to a kind of solenoid valve temperature rise computational analysis method.
Background technology
Solenoid valve has compact conformation, characteristics that operating accuracy is high mostly.In the course of work of valve, require electromagnetic mechanism work temperature rise low value and stablize.Therefore, in the optimal design process of solenoid valve, temperature rise comes requirement as an important index, on the basis of material-saving, energy-conservation, reliable operation, requires work temperature rise low value and stablizes.Therefore, computational analysis is carried out in the temperature rise in the solenoid stabilizer valve course of work and had important and practical meanings.
Summary of the invention
The object of the present invention is to provide a kind of solenoid valve temperature rise computational analysis method, this method helps the temperature rise of solenoid valve duty is calculated accurately and analyzed.
The objective of the invention is to realize like this: a kind of solenoid valve temperature rise computational analysis method is characterized in that: as follows computational analysis is carried out in the temperature rise of solenoid valve:
(1) sets up the electromagnetic field model and the models for temperature field of solenoid valve; Suppose that the solenoid valve initial temperature is environment temperature T0, preset coil preset temperature T1 equals environment temperature T0;
(2) calculate the resistivity of coil under temperature T 1;
(3), calculate in the ohmic loss of temperature T 1 lower coil, the magnetic hysteresis eddy current loss of magnetic conductor and the magnetic hysteresis eddy current loss of dynamic and static iron core based on said electromagnetic field model;
(4) coupling through electromagnetic field and temperature field; The loss of coil, magnetic conductor and the dynamic and static iron core that step (3) is calculated is as load; Be applied in the said models for temperature field, calculate the temperature rise of electromagnetic valve coil, magnetic conductor and dynamic and static iron core, obtain coil actual temperature T2;
Whether the difference of (5) judging said coil actual temperature T2 and coil preset temperature T1 is less than the minimal value set; Be then to finish to calculate, temperature T 2 is the coil equilibrium temperature, otherwise makes coil preset temperature T1 equal temperature T 2; Returning step (2) then recomputates; Iterate, until the difference of coil actual temperature T2 that calculates and coil preset temperature T1 less than the minimal value of setting, thereby obtain the coil equilibrium temperature.
The invention has the beneficial effects as follows through setting up solenoid valve 3 D electromagnetic field computation model and calculation model for temperature field, can be exactly according to coil magnetization voltage, the working loss of solenoid valve and energy situation when calculating stable operation.Simultaneously, the electromagnetic field model is combined with models for temperature field, form coupled field, can calculate accurately and analyze the temperature rise of solenoid valve duty.
Description of drawings
Fig. 1 is the workflow diagram of the inventive method.
Embodiment
Solenoid valve temperature rise computational analysis method of the present invention, as shown in Figure 1, as follows computational analysis is carried out in the temperature rise of solenoid valve:
(1) sets up the electromagnetic field model and the models for temperature field of solenoid valve; Suppose that the solenoid valve initial temperature is environment temperature T0, preset coil preset temperature T1 equals environment temperature T0;
(2) calculate the resistivity of coil under temperature T 1 according to formula
;
(3), calculate in the ohmic loss of temperature T 1 lower coil, the magnetic hysteresis eddy current loss of magnetic conductor and the magnetic hysteresis eddy current loss of dynamic and static iron core based on said electromagnetic field model;
(4) coupling through electromagnetic field and temperature field; The loss of coil, magnetic conductor and the dynamic and static iron core that step (3) is calculated is as load; Be applied in the said models for temperature field, calculate the temperature rise of electromagnetic valve coil, magnetic conductor and dynamic and static iron core, obtain coil actual temperature T2;
Whether the difference of (5) judging said coil actual temperature T2 and coil preset temperature T1 is less than the minimal value ε that sets; Be then to finish to calculate, temperature T 2 is the coil equilibrium temperature, otherwise makes coil preset temperature T1 equal temperature T 2; Returning step (2) then recomputates; Iterate, until the difference of coil actual temperature T2 that calculates and coil preset temperature T1 less than the minimal value of setting, thereby obtain the coil equilibrium temperature.
In step (1), consider that solenoid valve inner heat loss through conduction and solenoid valve integral body place airborne heat loss through convection, set up said models for temperature field.
Heat conducting form has three kinds of conduction, convection current, radiation.In the heat radiation process, because alternating current electromagnetic valve coil inside air does not almost have convection current, so coil inside carries out only considering when heat is analyzed heat loss through conduction.On the other hand, solenoid valve integral body is placed in the air, can produce heat loss through convection.Therefore, mainly contain conduction and two kinds of convection current, ignore heat radiation for solenoid valve.
In step (3), definite method of thermal source is following:
A, alternating current electromagnetic valve thermal source are confirmed:
For alternating current electromagnetic valve, after coil feeds alternating current, because the effect of alternating magnetic field, can be in the inner magnetic hysteresis eddy current loss that produces of ferromagnet.Therefore, for alternating current electromagnetic valve, main thermal source has: the ohmic loss that produces owing to resistance behind the coil electricity, the magnetic hysteresis eddy current loss that sound is unshakable in one's determination, the magnetic hysteresis eddy current loss of magnetic conductor.
B, DC electromagnetic valve thermal source are confirmed:
Because what the direct solenoid valve coil fed is direct supply, therefore there is not alternating magnetic field, there is not magnetic hysteresis eddy current loss, thermal source is only considered the ohmic loss that coil resistance produces.
Workflow in the face of step (4), (5) is described further down: through the calculating of step (4); Change has taken place compared to coil preset temperature T1 in coil actual temperature T2; And the coil resistance rate changes along with temperature variation, and the change of coil resistance rate can cause the change of coil resistance loss again.Because electromagnetic field once can only calculate the power situation under certain resistivity, therefore the solenoid valve power attenuation when stablizing in order to obtain temperature rise, through the iterative algorithm of step (5), calculates the temperature after coil temperature rise is stablized.
In step (5); Judge that the stable foundation of coil temperature rise is that the difference of coil actual temperature T2 and coil preset temperature T1 is whether less than the minimal value ε that sets; Promptly whether satisfy | T2-T1| < ε; If satisfy then explain that heat production is approximately equal to heat radiation, the coil temperature rise that calculates just can be similar to regards stable temperature rise as.Can change the value of ε as required, ε is more little, and computational accuracy is high more, but calculates the required time lengthening.
More than be preferred embodiment of the present invention, all changes of doing according to technical scheme of the present invention when the function that is produced does not exceed the scope of technical scheme of the present invention, all belong to protection scope of the present invention.
Claims (2)
1. solenoid valve temperature rise computational analysis method is characterized in that: as follows computational analysis is carried out in the temperature rise of solenoid valve:
(1) sets up the electromagnetic field model and the models for temperature field of solenoid valve; Suppose that the solenoid valve initial temperature is environment temperature T0, coil preset temperature T1 equals environment temperature T0;
(2) calculate the resistivity of electromagnetic valve coil under temperature T 1;
(3), calculate in the ohmic loss of 1 time electromagnetic valve coil of temperature T, the magnetic hysteresis eddy current loss of magnetic conductor and the magnetic hysteresis eddy current loss of dynamic and static iron core based on said electromagnetic field model;
(4) coupling through electromagnetic field and temperature field; The loss of electromagnetic valve coil, magnetic conductor and the dynamic and static iron core that step (3) is calculated is as load; Be applied in the said models for temperature field; Calculate the temperature rise of electromagnetic valve coil, magnetic conductor and dynamic and static iron core, obtain coil actual temperature T2;
Whether the difference of (5) judging said coil actual temperature T2 and coil preset temperature T1 is less than the minimal value set; Be then to finish to calculate, temperature T 2 is the coil equilibrium temperature, otherwise makes coil preset temperature T1 equal temperature T 2; Returning step (2) then recomputates; Iterate, until the difference of coil actual temperature T2 that calculates and coil preset temperature T1 less than the minimal value of setting, thereby obtain the coil equilibrium temperature.
2. solenoid valve temperature rise computational analysis method according to claim 1 is characterized in that: in step (1), consider that solenoid valve inner heat loss through conduction and solenoid valve integral body place airborne heat loss through convection, set up said models for temperature field.
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| CN2011101773338A CN102194034B (en) | 2011-06-29 | 2011-06-29 | Electromagnetic valve temperature rise computational analysis method |
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| CN2011101773338A CN102194034B (en) | 2011-06-29 | 2011-06-29 | Electromagnetic valve temperature rise computational analysis method |
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| CN103400010B (en) * | 2013-08-08 | 2016-08-17 | 英特工程仿真技术（大连）有限公司 | A kind of permagnetic synchronous motor temperature rise analysis of heat transmission method based on multi-scenarios method technology |
| DE102015104108A1 (en) * | 2014-03-20 | 2015-09-24 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | PARAMETER ESTIMATION IN AN ACTOR |
| CN105488292B (en) * | 2015-12-14 | 2020-03-20 | 中广核工程有限公司 | High-temperature valve structure performance evaluation method and system based on valve simulation model |
| CN108375422B (en) * | 2018-01-29 | 2019-10-29 | 中国第一汽车股份有限公司 | A kind of control method that electromagnet temperature rise is tested automatically, control device and system |
| CN110298090B (en) * | 2019-06-17 | 2023-05-02 | 三峡大学 | Electromagnetic field numerical calculation method of solenoid coil considering asymmetry |
| CN110555253A (en) * | 2019-08-26 | 2019-12-10 | 华南理工大学 | method for calculating temperature rise of solenoid valve coil in automobile braking system |
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| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
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| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
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