CN106124860A - A kind of evaluation method of permanent-magnet brushless DC electric machine armature winding resistance resistance - Google Patents
A kind of evaluation method of permanent-magnet brushless DC electric machine armature winding resistance resistance Download PDFInfo
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- CN106124860A CN106124860A CN201610425299.4A CN201610425299A CN106124860A CN 106124860 A CN106124860 A CN 106124860A CN 201610425299 A CN201610425299 A CN 201610425299A CN 106124860 A CN106124860 A CN 106124860A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The present invention relates to permanent-magnet type brushless direct-current technical field, it it is especially the evaluation method of a kind of permanent-magnet brushless DC electric machine armature winding resistance resistance, comprise the following steps: S1. controller determines armature winding electromagnetic states according to motor operating state information, resistance value after obtaining D.C. resistance resistance under armature current state through tabling look-up and comprising AC resistance effect equivalence, controls controllable resistor and exports this estimation resistance；S2. the motor under different service conditions is carried out finite element simulation；S3. process emulation data and obtain D.C. resistance and equivalent AC resistance resistance；S4. controller detects motor operating parameter and judges current operating conditions, and inquires about the corresponding resistance of AC resistance, sends resistance control instruction to controllable resistor；S5. the calculating of resistance is exported by controllable resistor according to controller instruction regulation output resistance.The present invention can help designer accurately to calculate winding loss, and permanent magnet brushless DC motor structure optimization design is played critically important effect.
Description
Technical field
The present invention relates to permanent-magnet type brushless direct-current technical field, be specially a kind of permanent-magnet brushless DC electric machine armature winding electricity
The evaluation method of resistance resistance.
Background technology
The rotor of permanent-magnet type brshless DC motor is permanent magnet, and the loss in rotor is uncontrollable, and motor internal loss is main
Producing in stator winding, want to reduce motor overall losses, the work efficiency of motor to be improved, main method is to reduce stator
Copper loss in winding.The construction features of magneto determines the loss accurately estimating armature winding, to electric machine structure
The lifting optimizing design and work efficiency has actual meaning.
The copper loss of stator winding is mainly showed by resistance heating.Under being passed through stable DC current conditions, winding
Resistance is mainly relevant to the resistivity of winding conducting wire, line footpath and length.The material of winding determines resistivity, therefore, only
To obtain winding wire diameter and length parameter exactly, it is possible to estimation stator winding resistance under DC current exactly,
Try to achieve the loss of electric machine exactly.
Under the effect of permanent magnet, the existence of alternating current is had in view of winding.Especially when, under high speed operation of motor, handing over
Stream loss will account for the proportion that winding loss is bigger.In this case, winding loss can not only consider the damage of DC current
Consumption, also should be equivalent to A.C.power loss including resistance calculations.
" stator resistance on-line identification method and device " (authorized announcement date 2015.09.16, patent No. CN 102611383
B) electric current, the voltage signal arrived according to on-line checking under a kind of stable state is proposed in, through coordinate transform with solve stator resistance,
The method detection variable is many, computationally intensive, and it is complicated to debug process.
The resistance calculated under direct current compared to winding, it is considered to the i.e. resistance of A.C.power loss adds in calculating to be handed over
Flow component can make result more closing to reality effect, also can preferably reflect stator winding copper loss under motor runs.Fixed
The actual resistance of sub-winding is not only it is also contemplated that resistance under direct current, it is also contemplated that winding wire diameter, winding current, electricity
The impact on its exchange resistance of the factors such as machine rotating speed.In other words, the copper loss running lower motor not only includes that armature supply is at electricity
Generate heat in resistance, it is also contemplated that rotor field produces the effect of alternating current function to stator side winding.Can be more through this method
Solve the loss value of stator side armature winding exactly.
Summary of the invention
It is an object of the invention to provide the evaluation method of a kind of magnetic brshless DC motor armature winding resistance resistance, to solve
The problem certainly proposed in above-mentioned background technology.The evaluation method of described magnetic brshless DC motor armature winding resistance resistance has standard
Really reduce the actual motion state of armature winding, calculate winding resistance value more accurately, so can accurately estimate fixed
The copper loss of son, has critically important value for carrying out design of electrical motor and survey.
For achieving the above object, the present invention provides following technical scheme: a kind of permanent-magnet brushless DC electric machine armature winding is electric
The evaluation method of resistance resistance, comprises the following steps:
S1. controller determines armature winding electromagnetic states according to motor operating state information, and through tabling look-up, acquisition armature is worked as
D.C. resistance resistance and the resistance value after comprising AC resistance effect equivalence under front state, control controllable resistor and export this estimation
Resistance；
S2. the motor under different service conditions is carried out finite element simulation；
S3. process emulation data and obtain D.C. resistance and equivalent AC resistance resistance；
S4. controller detects motor operating parameter and judges current operating conditions, and inquiry AC resistance is the most corresponding accordingly
Resistance, send resistance control instruction to controllable resistor；
S5. controllable resistor realizes the output of the calculating to resistance according to resistance control instruction regulation output resistance.
Preferably, A.C.power loss etc. under D.C. resistance resistance and current operating conditions under described resistance is current state
Resistance sum after effect process.
Preferably, the finite element stimulation in described step S2 goes out A.C.power loss, it is thus achieved that armature supply and motor electricity frequency
The rate impact effect to A.C.power loss.
Preferably, the motor operating parameter in described step S4 includes: motor speed and armature supply amplitude.
Compared with prior art, the invention has the beneficial effects as follows: the kelvin effect existed in stator winding of the present invention and neighbour
Nearly effect so that the situation that the resistance of winding resistance is inconsistent with the resistance of exquisite measuring and calculating, during given resistance by motor speed and
The factors such as armature supply are taken into account, reduce the actual motion state of armature winding as precisely as possible, calculate more accurately
Go out winding resistance value, and then can accurately estimate the copper loss of stator, for carrying out design of electrical motor and surveying and have critically important valency
Value.
Accompanying drawing explanation
Fig. 1 is that resistance of the present invention solves calculating fundamental block diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Referring to Fig. 1, the present invention provides a kind of technical scheme: a kind of permanent-magnet brushless DC electric machine armature winding resistance resistance
Evaluation method, comprise the following steps:
S1. controller determines armature winding electromagnetic states according to motor operating state information, and through tabling look-up, acquisition armature is worked as
D.C. resistance resistance and the resistance value after comprising AC resistance effect equivalence under front state, control controllable resistor and export this estimation
Resistance；
S2. the motor under different service conditions is carried out finite element simulation；
S3. process emulation data and obtain D.C. resistance and equivalent AC resistance resistance；
S4. controller detects motor operating parameter and judges current operating conditions, and inquiry AC resistance is the most corresponding accordingly
Resistance, send resistance control instruction to controllable resistor；
S5. controllable resistor realizes the output of the calculating to resistance according to resistance control instruction regulation output resistance.
On the basis of the conductor length of stator winding, line footpath, resistivity are known, resistance formula can be inserted in and estimate winding
DC resistance, simultaneously can pass through finite element analysis, calculate motor in different rotating speeds, difference armature supply running status
The lower AC resistance resistance corresponding with winding A.C.power loss, processes the ratio that can try to achieve AC resistance with D.C. resistance further,
This ratio is easy to motor speed, the corresponding system of armature supply research.
The current rotating speed of motor and armature supply information can be obtained by controller, obtain direct current under running status through tabling look-up
Resistance RaRatio K with AC resistance Yu D.C. resistancea, and sending an instruction to controllable resistor, controllable resistor is according to acquisition
Instruction, regulates output resistance, controls the resistance after it superposes with AC resistance, i.e. R=(1+K for D.C. resistancea)Ra, finally real
The now approximate simulation to armature winding resistance.
Under running in view of motor, the kelvin effect existed in stator winding and kindred effect so that the resistance of winding resistance
The situation that value is inconsistent with the resistance of exquisite measuring and calculating, takes into account the factor such as motor speed and armature supply during given resistance,
Reduce the actual motion state of armature winding as precisely as possible, calculate winding resistance value more accurately, and then can be accurate
Estimate the copper loss of stator, have critically important value for carrying out design of electrical motor and survey.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and these embodiments can be carried out multiple change without departing from the principles and spirit of the present invention, revise, replace
And modification, the scope of the present invention be defined by the appended.
Claims (4)
1. the evaluation method of a permanent-magnet brushless DC electric machine armature winding resistance resistance, it is characterised in that comprise the following steps:
S1. controller determines armature winding electromagnetic states according to motor operating state information, through the acquisition current shape of armature of tabling look-up
D.C. resistance resistance and the resistance value after comprising AC resistance effect equivalence under state, control controllable resistor and export this estimation resistance
Value；
S2. the motor under different service conditions is carried out finite element simulation；
S3. process emulation data and obtain D.C. resistance and equivalent AC resistance resistance；
S4. controller detects motor operating parameter and judges current operating conditions, accordingly the inquiry corresponding resistance of AC resistance
Value, sends resistance control instruction to controllable resistor；
S5. controllable resistor realizes the output of the calculating to resistance according to resistance control instruction regulation output resistance.
The evaluation method of a kind of permanent-magnet brushless DC electric machine armature winding resistance resistance the most according to claim 1, it is special
Levy and be: described resistance is under current state under D.C. resistance resistance and current operating conditions after A.C.power loss equivalent process
Resistance sum.
The evaluation method of a kind of permanent-magnet brushless DC electric machine armature winding resistance resistance the most according to claim 1, it is special
Levy and be: the finite element stimulation in described step S2 goes out A.C.power loss, it is thus achieved that armature supply with motor electricity frequency to exchanging
The impact effect of loss.
The evaluation method of a kind of permanent-magnet brushless DC electric machine armature winding resistance resistance the most according to claim 1, it is special
Levy and be: the motor operating parameter in described step S4 includes: motor speed and armature supply amplitude.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820600A (en) * | 2021-11-25 | 2021-12-21 | 天津飞旋科技股份有限公司 | Alternating current resistance testing system, method and device and computer readable storage medium |
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| CN105281632A (en) * | 2014-07-23 | 2016-01-27 | 江苏风达为新能源科技有限公司 | Current coordination control method of hybrid excitation motor |
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| CN105281632A (en) * | 2014-07-23 | 2016-01-27 | 江苏风达为新能源科技有限公司 | Current coordination control method of hybrid excitation motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820600A (en) * | 2021-11-25 | 2021-12-21 | 天津飞旋科技股份有限公司 | Alternating current resistance testing system, method and device and computer readable storage medium |
| CN113820600B (en) * | 2021-11-25 | 2022-02-22 | 天津飞旋科技股份有限公司 | Alternating current resistance testing system, method and device and computer readable storage medium |
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