CN206057518U - Coil winding of motor stator de-embedding detection means - Google Patents
Coil winding of motor stator de-embedding detection means Download PDFInfo
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- CN206057518U CN206057518U CN201621064490.2U CN201621064490U CN206057518U CN 206057518 U CN206057518 U CN 206057518U CN 201621064490 U CN201621064490 U CN 201621064490U CN 206057518 U CN206057518 U CN 206057518U
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- transmission shaft
- motor stator
- supporting table
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Abstract
The utility model discloses a kind of coil winding of motor stator de-embedding detection means, including detection circuit, supporting table, it is installed in the power set of the supporting table lower surface, axis hole is provided with the supporting table, power set have power transmission shaft, the power transmission shaft passes through the axis hole and extends to above the upper surface of supporting table, the free end of the power transmission shaft is fixed with permanent magnet, the side of the axis hole is installed with inductive switch, inductor is installed with the power transmission shaft, axis hole described in the upper table face ring of the supporting table is installed with for supporting the support ring frame of stator winding coil, the detection circuit includes controller, filter circuit, amplifying circuit, and A/D change-over circuits.This coil winding of motor stator de-embedding detection means, it is not necessary to stator winding electrifying, while the stator of de-embedding especially single bag de-embedding preferably can be judged, it is to avoid the erroneous judgement and situation about failing to judge in production detection process.
Description
Technical field
This utility model is related to electric machines test technical field, specifically, is that to be related to a kind of coil winding of motor stator anti-
Embedding detection means.
Background technology
Due to the design reasons of motor, it is distributed in one or more grooves per the rule of pole winding.And motor is being given birth to
Due to a variety of causes during product, it may appear that stator winding occur around anti-or misplaced line the problems such as.For some misplaced lines or
The whole winding of person as the motor of this stator all normally can not operate, therefore is easy to detect and is judged around anti-stator.
But for, when in stator winding line bag, de-embedding occur in coil sections, motor can run well, and conventional sense mode is difficult to sentence
Disconnected with the presence or absence of de-embedding, the de-embedding of part winding will affect the performance and used life of motor, at present conventional hall sensing
Device is scanned and is converted into square wave and judges that the method for de-embedding mainly has following defect：
One is needed to the logical unidirectional current of stator winding to produce stationary magnetic field, if the excitation voltage is too small, produces magnetic
Field signal is weaker, and the accuracy to judging has an impact；If excitation voltage is excessive, exciting current is very big, turns for not installing
For the stator coil of son, excessive exciting current translates into heat energy loss, causes winding or insulation harm.
Two is, for whole winding de-embedding, to produce anti-phase magnetic field, accurately can test；And for single bag de-embedding or portion
Divide de-embedding, when especially the de-embedding number of turns is less, the difference of the stationary magnetic field of generation is very faint, it is impossible to reliably detects and sentences
It is disconnected.
Three is that existing detection mode needs Hall element short range scanning to detect, not only test fixture is complicated, needs to drive
Galvanic electricity machine drives Hall element rotation sweep, and as the Hall element of classical sensing element, also can Jing in practicality
Often there is situations such as damaging.
The content of the invention
This utility model detects poor reliability, easily damages winding coil to solve existing motor stator winding de-embedding
A kind of technical problem, it is proposed that coil winding of motor stator de-embedding detection means, can solve the above problems.
In order to solve above-mentioned technical problem, this utility model is employed the following technical solutions and is achieved：
A kind of coil winding of motor stator de-embedding detection means, including detect circuit, supporting table, be installed in the supporting table
The power set of lower surface, are provided with axis hole in the supporting table, power set have power transmission shaft, and the power transmission shaft passes through the axle
Hole is simultaneously extended to above the upper surface of supporting table, and the free end of the power transmission shaft is fixed with permanent magnet, and the side of the axis hole is solid
Be provided with inductive switch, on the power transmission shaft, be installed with inductor, axis hole described in the upper table face ring of the supporting table be installed with for
The support ring frame of stator winding coil, the detection circuit is supported to include that controller, filter circuit, amplifying circuit and A/D turn
Circuit is changed, the controller outputs control signals to the power set and controls the drive axis, and the power transmission shaft drives
During the permanent magnet rotating, the permanent magnet of rotation produces uniform magnetic field, and the stator winding coil cutting magnetic induction line of relative motion is simultaneously
Generation back-emf signal sends to the filter circuit and is filtered, and the filter circuit output filtering signal is successively described in Jing
Amplifying circuit amplify, and A/D change-over circuits conversion after, sending to the controller carries out calculating process, the inductive switch
For detecting the inductor, and produce detection signal and send to the controller number of turns for judging permanent magnet rotation.
Further, the filter circuit includes the first resistor being arranged in parallel and the first electric capacity, first electric capacity two
End is also parallel with stabilivolt.
Further, the amplifying circuit includes the first operational amplifier, the in-phase end of first operational amplifier with
The outfan connection of the filter circuit, end of oppisite phase are connected with amplification control circuit, the input of outfan and A/D change-over circuits
Connection.
Further, the first follower is connected between the filter circuit and first operational amplifier.
Further, low-pass filter circuit is connected between first follower and first operational amplifier.
Further, the second follower is connected between first operational amplifier and the A/D change-over circuits.
Further, the permanent magnet is Magnet.
Compared with prior art, advantage of the present utility model and good effect are：Motor stator winding of the present utility model
Coil de-embedding detection means, drives permanent magnet to rotate in stator interior using power set, makes stator winding produce counter electromotive force
Mode, it is not necessary to stator winding electrifying, the stator caused to the logical high current of winding can be avoided from damaging；And occur single bag or
During the de-embedding of part, back emf waveform distortion degree is become apparent from relative to the wave distortion that logical exciting current is produced, it is easier to
Distinguish and judge, it is to avoid erroneous judgement and situation about failing to judge；And this determination methods implement from hardware it is simpler, only
Need a block permanent magnet and motor frock, it is to avoid design constant current source module, and use Hall element and in rotation
The trouble of wiring on rotating tooling.
After the detailed description of this utility model embodiment is read in conjunction with the accompanying, other features of the present utility model and advantage
Will become clearer from.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that a kind of example structure of the coil winding of motor stator de-embedding detection means proposed by this utility model is shown
It is intended to；
Fig. 2 is a kind of embodiment principle side of the coil winding of motor stator de-embedding detection means proposed by this utility model
Block diagram；
Fig. 3 is that a kind of embodiment circuit of the coil winding of motor stator de-embedding detection means proposed by this utility model is former
Reason figure.
Specific embodiment
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
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one, the present embodiment propose a kind of coil winding of motor stator de-embedding detection means, as shown in figure 1, bag
Include detection circuit, supporting table 11, be installed in the power set 12 of 11 lower surface of supporting table, axis hole 111 is provided with supporting table 11, is moved
Power apparatus 12 have power transmission shaft 121, and power transmission shaft 121 passes through axis hole 111 and extends to above the upper surface of supporting table 11, power transmission shaft
121 free end is fixed with the side of 13,111 axis hole of permanent magnet and is installed with inductive switch 14, and sensing is installed with power transmission shaft 121
Body 15, the upper surface annulate shaft hole 111 of supporting table 11 are installed with for supporting the support ring frame 16 of stator winding coil, such as Fig. 2, figure
Shown in 3, detection circuit includes controller, filter circuit, amplifying circuit and A/D change-over circuits, wherein, controller adopts DSP
Realize, controller outputs control signals to power set control drive axis, when power transmission shaft 121 drives permanent magnet 13 to rotate,
The permanent magnet 13 of rotation produces uniform magnetic field, and the stator winding coil cutting magnetic induction line of relative motion simultaneously produces back-emf signal
And send to filter circuit and be filtered, filter circuit output filtering signal successively amplified circuit amplify, and A/D conversion electricity
Road conversion after send to controller, controller waveform is carried out the calculating of FFT Fourier transformations process, judged with result of calculation be
It is no to there is de-embedding.Inductive switch is used to detect the inductor, and produces detection signal and send to the controller, controller with
This is judging Magnet rotating cycle.The Cleaning Principle of this coil winding of motor stator de-embedding detection means is：Controller is by dynamic
Power apparatus control power transmission shaft drive permanent magnet rotating, due to permanent magnet be located at stator winding coil inside, stator winding coil with
The magnetic field relative motion that permanent magnet is produced, stator winding cutting magnetic induction line, therefore can produce at the two ends of stator winding anti-electronic
Gesture, if without de-embedding, counter electromotive force should be the sine wave of standard, otherwise, then can be the sine wave for having distortion；To stator winding line
The back-emf signal that circle is produced is filtered, processing and amplifying, AD conversion send into controller and carry out FFT calculating, according to calculating
Judge that multifrequency sinusoid accounts for the percentage ratio of fundamental wave and judges whether de-embedding.
Due to inductor 15 as power transmission shaft 121 is rotated, inductive switch 14 is used to detect inductor 15, and produces an inspection
Survey signal to send to controller, controller judges one or several complete rotation periods according to detection signal, and then
Control power set stop operating.
The coil winding of motor stator de-embedding detection means of the present embodiment, using power set drive permanent magnet in stator
Portion rotates, and makes stator winding produce the mode of counter electromotive force, it is not necessary to stator winding electrifying, can avoid big electricity logical to winding
The stator that stream is caused is damaged；And when there is single bag or part de-embedding, back emf waveform distortion degree is relative to logical exciting current
The wave distortion of generation becomes apparent from, it is easier to distinguishes and judges, it is to avoid erroneous judgement and situation about failing to judge；And this judgement side
Method implements simpler from hardware, it is only necessary to a block permanent magnet and motor frock, it is to avoid design constant current
Source module, and using Hall element and on rotary tooling wiring trouble.Wherein, permanent magnet 13 can adopt Magnet reality
It is existing.
In the present embodiment, preferred controller is rotated with fixed frequency with fixing pwm pulse output control power set.
General design of electrical motor is the steady of guarantee rotor operating, is designed to circular magnetic field, therefore spatial distribution of the winding per pole is all
Symmetrical, the back emf waveform of generation is sine wave.
As a preferred embodiment, as shown in figure 3, filter circuit includes first resistor R1 being arranged in parallel and first
Electric capacity C1, the first electric capacity C1 two ends are also parallel with stabilivolt TVS, and filter circuit is used to filter public frequency interference and burr interference.
Amplifying circuit includes the first operational amplifier U1, the in-phase end of the first operational amplifier U1 and the output of filter circuit
End connection, end of oppisite phase are connected with amplification control circuit, and outfan is connected with the input of A/D change-over circuits.Controller reads and adopts
The amplitude of collection signal and by amplification control circuit U4 adjusting suitable amplification, by controlling the first operational amplifier U1
Waveform is amplified, sine wave is changed into digital quantity into AD sample circuits and is sent to controller by the waveform after amplification；Controller
The cycle of sine wave and the quantity of sine wave are calculated after sine-shaped digital signal is received, then to each cycle
Carry out FFT Fourier transformations and calculate the ratio that harmonic component in waveform accounts for fundamental wave, that is, the distortion factor of sine wave, if
Normal stator, sinusoidal wave form are uniform, and the distortion factor is zero, if the stator of de-embedding, the distortion factor is then than larger.Judged with this
Stator whether there is de-embedding.Wherein, A/D change-over circuits can be realized using an A/D conversion chips U5.
The first follower U2 is connected between filter circuit and the first operational amplifier, the first follower U2 is played to filtering
The signal damping of circuit output and the effect to noise isolation.
Low-pass filter circuit is connected between first follower U2 and the first operational amplifier U1, as shown in figure 3, in this reality
Apply in example, low-pass filter circuit includes second resistance R2 and the second electric capacity C2, for filtering the high-frequency noise in signal.
As a same reason, the second follower U3 is connected between the first operational amplifier U1 and the A/D change-over circuits, the
Two follower U3 play a part of to the signal damping of amplifying circuit output and to noise isolation.
Certainly, described above is not that, to restriction of the present utility model, this utility model is also not limited to the example above,
Change, remodeling, addition or replacement that those skilled in the art are made in essential scope of the present utility model,
Protection domain of the present utility model should also be belonged to.
Claims (7)
1. a kind of coil winding of motor stator de-embedding detection means, it is characterised in that：Including detection circuit, supporting table, it is installed in
The power set of the supporting table lower surface, are provided with axis hole in the supporting table, power set have power transmission shaft, the power transmission shaft
Through the axis hole and extend to above the upper surface of supporting table, the free end of the power transmission shaft is fixed with permanent magnet, the axle
The side in hole is installed with inductive switch, and inductor, axis hole described in the upper table face ring of the supporting table are installed with the power transmission shaft
It is installed with for supporting the support ring frame of stator winding coil, the detection circuit to include controller, filter circuit, amplify electricity
Road and A/D change-over circuits, the controller output control signals to the power set and control the drive axis, institute
When stating the power transmission shaft drive permanent magnet rotating, the permanent magnet of rotation produces uniform magnetic field, the stator winding coil of relative motion
Cutting magnetic induction line simultaneously produces back-emf signal and sends to the filter circuit and be filtered, the filter circuit output filtering letter
Number successively the amplifying circuit described in amplify, and the conversion of A/D change-over circuits after, sending to the controller carries out calculating process,
The inductive switch is used to detect the inductor, and produces detection signal and send to the controller and judge what permanent magnet rotated
The number of turns.
2. coil winding of motor stator de-embedding detection means according to claim 1, it is characterised in that：The filter circuit
Including the first resistor being arranged in parallel and the first electric capacity, the first electric capacity two ends are also parallel with stabilivolt.
3. coil winding of motor stator de-embedding detection means according to claim 2, it is characterised in that：The amplifying circuit
Including the first operational amplifier, the in-phase end of first operational amplifier is connected with the outfan of the filter circuit, anti-phase
End is connected with amplification control circuit, and outfan is connected with the input of A/D change-over circuits.
4. coil winding of motor stator de-embedding detection means according to claim 3, it is characterised in that：The filter circuit
The first follower is connected between first operational amplifier.
5. coil winding of motor stator de-embedding detection means according to claim 4, it is characterised in that：Described first follows
Low-pass filter circuit is connected between device and first operational amplifier.
6. coil winding of motor stator de-embedding detection means according to claim 4, it is characterised in that：First computing
The second follower is connected between amplifier and the A/D change-over circuits.
7. the coil winding of motor stator de-embedding detection means according to any one of claim 1-6, it is characterised in that：It is described
Permanent magnet is Magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621064490.2U CN206057518U (en) | 2016-09-19 | 2016-09-19 | Coil winding of motor stator de-embedding detection means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621064490.2U CN206057518U (en) | 2016-09-19 | 2016-09-19 | Coil winding of motor stator de-embedding detection means |
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| Publication Number | Publication Date |
|---|---|
| CN206057518U true CN206057518U (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621064490.2U Active CN206057518U (en) | 2016-09-19 | 2016-09-19 | Coil winding of motor stator de-embedding detection means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212412A (en) * | 2017-07-05 | 2019-01-15 | 致茂电子(苏州)有限公司 | Alternating current motor test device and alternating current motor test method |
-
2016
- 2016-09-19 CN CN201621064490.2U patent/CN206057518U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212412A (en) * | 2017-07-05 | 2019-01-15 | 致茂电子(苏州)有限公司 | Alternating current motor test device and alternating current motor test method |
| CN109212412B (en) * | 2017-07-05 | 2020-11-13 | 致茂电子(苏州)有限公司 | AC motor testing device and AC motor testing method |
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