CN207780217U - A kind of zero-bit angle test device of rotary transformer - Google Patents
A kind of zero-bit angle test device of rotary transformer Download PDFInfo
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- CN207780217U CN207780217U CN201820182076.4U CN201820182076U CN207780217U CN 207780217 U CN207780217 U CN 207780217U CN 201820182076 U CN201820182076 U CN 201820182076U CN 207780217 U CN207780217 U CN 207780217U
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Abstract
The utility model provides a kind of zero-bit angle test device of rotary transformer, including：Power plant, tested motor, rotary transformer, transformer-supplied device, signal pickup assembly and signal conversion and processing unit；Wherein, power plant is connect with tested motor, for driving tested motor to desired speed；Rotary transformer setting is connect in tested motor, and with transformer-supplied device and signal pickup assembly；Signal pickup assembly is also connected with arbitrary the two of tested motor, and is connect with signal conversion and processing unit；Transformer-supplied device is used to provide electric power for rotary transformer, signal pickup assembly be used for acquire rotary transformer output rotation varying signal and tested motor arbitrary two-phase back-emf signal and by the back-emf signal of acquisition be sent to signal convert and processing unit converted and handled, to obtain the zero-bit angle of rotary transformer.The utility model test is easy, and error is small.
Description
Technical field
The utility model is related to a kind of zero-bit angle test devices of rotary transformer.
Background technology
For permanent magnet synchronous motor because of its stable work in work, power/torque density is big, simple and compact for structure, in many fields
It is widely used.In order to realize the high-performance high reliability of permanent magnet synchronous motor, it is accurate obtain rotor-position be must can not
Few condition.
Rotor position detecting sensor of the rotary transformer as common permanent magnet synchronous motor, because of its higher precision and
Reliability is also widely used on electric vehicle.Manufacture due to permanent magnet synchronous motor and rotary transformer and peace
Dress tolerance makes the zero-bit angle of rotary transformer and permanent magnet synchronous motor zero-bit angle usually there is deviation, and deviation size can not
Ensure, in engineer application, it usually needs accurately demarcated to the zero-bit angle of rotary transformer, common method is anti-electricity
Gesture zero crossing becomes sin envelope zero cross point comparing methods with rotation, and this method is very high for the testing requirements of zero crossing, is not easy reality
It is existing and very big by the error of zero that single-point is calculated.
It would therefore be highly desirable to need the detection at the zero-bit angle for the rotary transformer for occurring a kind of easy to implement and small the error of zero
Scheme.
Utility model content
In view of the above-mentioned problems, the utility model provides, a kind of test is easy, error is small, rotary transformer easy to implement
Zero-bit angle test device.
The technical solution adopted in the utility model is：
The utility model embodiment provides a kind of zero-bit angle test device of rotary transformer, including：Power plant is tested
Motor, rotary transformer, transformer-supplied device, signal pickup assembly and signal conversion and processing unit；Wherein, the power
Device is connect with the tested motor, for driving the tested motor to desired speed；The rotary transformer is arranged in institute
It states in tested motor, and is connect with the transformer-supplied device and the signal pickup assembly；The signal pickup assembly is also
It is connected with arbitrary the two of the tested motor, and is connect with signal conversion and processing unit；The transformer-supplied dress
It sets for providing electric power for the rotary transformer, the signal pickup assembly is used to acquire the rotation of the rotary transformer output
The back-emf signal of acquisition is simultaneously sent to the signal by the back-emf signal of the arbitrary two-phase of varying signal and the tested motor
Conversion and processing unit are converted and are handled, to obtain the zero-bit angle of the rotary transformer；The rotation varying signal includes rotation
Become excitation signal, rotation becomes sinusoidal signal and rotation becomes cosine signal.
Optionally, the signal pickup assembly is voltage sensor.
Optionally, the transformer-supplied device is that rotation becomes field circuit.
Optionally, the signal conversion and processing unit include sample circuit and signal processor；Wherein, the sampling electricity
Road is connect with the signal pickup assembly, and the signal for acquiring the signal pickup assembly is converted to workable signal simultaneously
It is sent to the signal processor.
Optionally, the signal is converted and processing unit is channel wave tracer or oscillograph.
The zero-bit angle test device of rotary transformer provided by the utility model, the rotation using the rotary transformer of acquisition become
Signal calculates the angle that the rotor estimated turns over and utilizes the three-phase back-emf signal calculating rotor of the tested motor of acquisition practical
The angle turned over, it is poor then by the two make, and will make poor obtained value as the zero-bit angle of rotary transformer so that tested
Journey is simply easy to implement, and error is small.
Description of the drawings
Fig. 1 is the structural schematic diagram of the zero-bit angle test device for the rotary transformer that the utility model embodiment provides；
Fig. 2 is the flow diagram of the zero-bit angle test method for the rotary transformer that the utility model embodiment provides；
Fig. 3 is that the structural schematic diagram of system is tested at the zero-bit angle for the rotary transformer that the utility model embodiment provides.
Specific implementation mode
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
Fig. 1 is the structural schematic diagram of the zero-bit angle test device for the rotary transformer that the utility model embodiment provides.Such as
Shown in Fig. 1, the utility model embodiment provides a kind of zero-bit angle test system of rotary transformer, including：Power plant 101,
Tested motor 102, rotary transformer 103, transformer-supplied device 104, signal pickup assembly 105 and signal conversion and processing dress
Set 106.Wherein, the power plant 101 is connect with the tested motor 102, for driving the tested motor to turn to predetermined
Speed；The rotary transformer 103 be arranged in the tested motor 102, and with the transformer-supplied device 104 and the letter
Number harvester 105 connects；The signal pickup assembly 105 is also connected with arbitrary the two of the tested motor 102, and with institute
It states signal conversion and processing unit 106 connects；The transformer-supplied device 104 is used to provide for the rotary transformer 103
Electric power, the signal pickup assembly 104 are used to acquire the rotation varying signal of the output of the rotary transformer 103 and the tested motor
The back-emf signal of acquisition is simultaneously sent to the signal conversion and processing unit 106 by the back-emf signal of 102 arbitrary two-phase
It is converted and is handled, to obtain the zero-bit angle of rotary transformer；The rotation varying signal includes that rotation becomes excitation signal, rotation becomes sinusoidal
Signal and rotation become cosine signal.
Specifically, the power plant 101 in the utility model embodiment can be dynamometer machine or other prime mover, be tested electricity
Machine 102 can be permanent magnet synchronous motor, and power plant 101 can carry out machinery with tested motor 102 by ring flange and connecting shaft
Connection can be driven tested motor 102 to desired speed by the drive of power plant 101.Transformer-supplied device 104 can be
Rotation becomes field circuit, is connect with rotary transformer 103, and providing excitation signal for rotary transformer 103 is powered.Signal acquisition
Device 105 can be voltage sensor, and 5 voltage sensors, two of which and tested electricity can be arranged in the utility model embodiment
The arbitrary two-phase of machine 102, such as U phases are attached with V phases, and for acquiring two-phase back-emf signal, back-emf signal can pass through
Two-phase phase voltage or two phases line voltage values are acquired to obtain, in addition 3 voltage sensors are connect with rotary transformer 103, point
Not Cai Ji rotary transformer 103 export rotation become excitation signal, rotation become sinusoidal signal and rotation become cosine signal.
In an illustrative examples of the utility model, signal conversion and processing unit 106 may include sample circuit
And signal processor.Wherein, the sample circuit is connect with the signal pickup assembly 105, for filling the signal acquisition
The signal for setting 105 acquisitions is converted to workable signal and is sent to the signal processor.Partial pressure electricity can be used in sample circuit
Any processor with calculation function can be used in the form of resistance, signal processor.In one example, rotation become field circuit,
Sample circuit and signal processor can be integrated on the electric machine controller of tested motor 102, and however, it is not limited to this, can also be single
Solely it is configured.
In another illustrative examples of the utility model, signal is converted and processing unit 106 can be channel waveform
The collecting devices such as recorder or oscillograph.
In the present invention, signal conversion and processing unit 106 can be adopted signal pickup assembly 105 based on preset algorithm
The signal of collection carries out the zero-bit angle for being converted to rotary transformer 103, is obtained including the use of the arbitrary two-phase back-emf signal of acquisition
To three-phase back-emf signal, the practical angle turned over of rotor then is calculated using three-phase back-emf signal, and become letter using rotation
Number soft decoding resolves the angle that rotation varying signal is turned over the rotor estimated, then by the fixation between obtain two angles
Deviation is determined as the manufacture of permanent magnet synchronous motor and rotary transformer and the caused rotation of location tolerance becomes zero-bit.
Specifically, the zero-bit angle test device for the rotary transformer that the utility model embodiment provides passes through power plant
101 dragging tested motors 102, make it be operated under a stabilized (steady-state) speed, as long as the stabilized (steady-state) speed can ensure under the rotating speed
It can collect and stablize effective back-emf signal, arbitrary two opposite potential of tested motor is acquired by voltage sensor
Signal, and U is calculated by the arbitrary two-phase back-emf signal of acquisitionU、UV、UWVoltage signal, specifically can be according to three opposite potentials
The sum of signal is calculated equal to null solution.While acquiring back-emf signal, can synchronous acquisition rotary transformer sin signals, cos
Signal and excitation signal.In an example of the utility model, the data in default period can be acquired to carry out at analysis
Reason, for example, 3 periods data, it is filtered can be to avoid the influence of test noise and harmonic wave.
The resolving for the angle, θ that signal is converted and processing unit 106 is turned over by the rotor that the rotation varying signal of acquisition obtains
Method can be as shown in following formula (1)：
Wherein, UrefFor the excitation signal of voltage sensor acquisition, UsinFor voltage sensor acquisition acquisition dextrorotation signal,
UcosFor the cosine signal of voltage sensor acquisition, e is excitation signal amplitude, and f is excitation signal frequency, and k is no-load voltage ratio, when t is
Between, sin θ and cos θ are envelope, i.e., the sine value and cosine value of the angle that rotor turns over.
It can be obtained according to above formula (1)
Signal is converted and processing unit 106 passes through UU、UV、UWVoltage signal determines the practical angle, θ turned over of rotordSolution
Calculation method is as follows.It is known
Wherein, UmFor three-phase voltage amplitude, ω t are the practical angle turned over of current rotor, i.e. θd=ω t.
Then, the three-phase voltage signal based on 3 axis, the stator stationary coordinate system of 2 dimensions is converted to obtain base by CLARKE
In the U of 2 axis stator stationary coordinate systemsαAnd Uβ, wherein phase voltage UUWith UαPhase is identical, UαAnd UβWith three-phase voltage signal UU、UV、
UWBetween transformational relation can be as follows：
Above-mentioned equation abbreviation is obtained
According to the above, the practical angle, θ turned over of rotor can be obtaineddFor：
Misalignment angle to known between the zero-bit angle and permanent magnet synchronous motor zero-bit angle of rotary transformer, which is revolved, becomes zero
Parallactic angle θ0For θ0=θ-θd。
It should be noted that above-mentioned formula, which is only applicable to rotation, becomes the number of pole-pairs situation equal with rotor number of pole-pairs, if the two
Quantity is inconsistent, then needs to introduce rotor number of pole-pairs PMotorAnd rotation becomes number of pole-pairs PRotation becomes, the relationship of the two is,I.e.
Due to the limitation in arctan function period, need to judge θ and θ respectivelydPlace quadrant, and then convert to 0~
After 360 ° of angular interval, then carry out θ0It resolves.
According to the positive and negative values of rotation varying signal, using following formula (2) by θdIt converts between 0~360 °：
Because of phase voltage UUWith UαPhase is identical, can be by judging UαAnd UβPositive and negative values, and using following formula (3)
θ is converted between 0~360 °：
Conceived based on same utility model, the utility model embodiment additionally provides a kind of zero-bit angle survey of rotary transformer
Method for testing should since the principle of the solved problem of this method is similar to the zero-bit angle of aforementioned rotary transformer test system
The implementation of method may refer to the implementation of aforementioned system, and overlaps will not be repeated.
Fig. 2 is the flow diagram of the zero-bit angle test method for the rotary transformer that the utility model embodiment provides.Such as
Shown in Fig. 2, the utility model embodiment provides a kind of zero-bit angle test method of rotary transformer, includes the following steps：
S201, acquire tested motor arbitrary two-phase back-emf signal and rotary transformer rotation varying signal；It is described
It includes that rotation becomes excitation signal, rotation becomes sinusoidal signal and rotation becomes cosine signal to revolve varying signal.
S202, the angle that the rotor of the tested motor of estimation turns over is determined based on the rotation varying signal acquired；
S203, the three opposite potentials letter that the tested motor is determined based on the back-emf signal of the arbitrary two-phase acquired
Number, and identified three-phase back-emf signal is handled using default transform method to obtain the rotor reality of tested motor
The angle turned over.
The rotor of S204, the angle and obtained tested motor for turning over the rotor of the tested motor of obtained estimation
The angle actually turned over is subtracted each other, and using the difference subtracted each other as the zero-bit angle of the rotary transformer.
Step S202's and S203 executes not stringent sequence.
In step s 201, the phase voltage value or arbitrary of the arbitrary two-phase of tested motor can be acquired by voltage sensor
The line voltage value of two-phase and the rotation varying signal that rotary transformer is acquired by voltage sensor.
Further, step S202 is specifically included：Become excitation signal based on rotation and becomes excitation with rotation change excitation signal amplitude, rotation
First function relationship between signal frequency and time, rotation become sinusoidal signal and become excitation with no-load voltage ratio, rotation change excitation signal amplitude, rotation
Second function relationship and rotation between the angle that signal frequency, time and the rotor of estimation turn over become cosine signal and become
Than the third letter between, the angle that rotation becomes excitation signal amplitude, rotation becomes excitation signal frequency, time and the rotor of estimation turn over
Number relationship, determines the angle that the rotor of the estimation turns over.
Rotation becomes excitation signal and rotation becomes excitation signal amplitude, rotation becomes excitation signal frequency and the functional relation between the time,
Rotation becomes sinusoidal signal and becomes what excitation signal frequency, time and the rotor of estimation turned over no-load voltage ratio, rotation change excitation signal amplitude, rotation
Functional relation between angle and rotation become cosine signal becomes excitation signal amplitude with no-load voltage ratio, rotation, rotation becomes excitation signal frequency, when
Between and the angle that turns over of rotor of estimation between functional relation can be as shown in following formula (4)：
Wherein, UrefFor the excitation signal of voltage sensor acquisition, UsinFor voltage sensor acquisition acquisition dextrorotation signal,
UcosFor the cosine signal of voltage sensor acquisition, e is excitation signal amplitude, and f is excitation signal frequency, and k is no-load voltage ratio, when t is
Between, sin θ and cos θ are envelope, i.e., the sine value and cosine value of the angle that rotor turns over.
It can be obtained according to above formula (4)The angle that the rotor estimated turns over be equal to rotation become sinusoidal signal with
Rotation becomes the arc tangent of the quotient of cosine signal.
In the present embodiment, the default transform method converts for CLARKE.Transformation side is preset in utilization in step S203
It includes following that method, which is handled identified three-phase back-emf signal to obtain the practical angle turned over of the rotor of tested motor,
Step：
Step 1: the three-phase back-emf signal based on 3 axis, the stator stationary coordinate system of 2 dimensions is converted by CLARKE, obtain
To the two-phase back-emf signal of the stator stationary coordinate system based on 2 axis；The two-phase back-emf signal of the stator stationary coordinate system
Including the first opposite potential signal and the second opposite potential signal.
Step 2: based on the functional relation between three-phase back-emf signal and the practical angle turned over of voltage magnitude and rotor
And obtained two-phase back-emf signal, obtain the practical angle turned over of the rotor.
Specifically, the functional relation between three-phase back-emf signal and the practical angle turned over of voltage magnitude and rotor can be such as
Shown in following formula (5)：
Wherein, UmFor three-phase voltage amplitude, ω t are the practical angle turned over of current rotor, i.e. θd=ω t.
Then, the three-phase voltage signal based on 3 axis, the stator stationary coordinate system of 2 dimensions is converted to obtain base by CLARKE
In the first opposite potential signal U of 2 axis stator stationary coordinate systemsαAnd the second opposite potential signal Uβ, wherein phase voltage UUWith Uα
Phase is identical, UαAnd UβWith three-phase voltage signal UU、UV、UWBetween transformational relation can be as follows：
Above-mentioned equation abbreviation is obtained
According to the above, the practical angle, θ turned over of rotor can be obtaineddFor：
Misalignment angle to known between the zero-bit angle and permanent magnet synchronous motor zero-bit angle of rotary transformer, which is revolved, becomes zero
Parallactic angle θ0For θ0=θ-θd。
Further, the method for the present embodiment further includes：Become number of pole-pairs and tested motor for the rotation in rotary transformer
Rotor number of pole-pairs it is unequal in the case of, it is real to obtained rotor that number of pole-pairs and the rotor number of pole-pairs are become based on the rotation
The angle that border turns over is modified.
Rotation obtained above becomes zero-bit angle calculation formula and is only applicable to the rotation change number of pole-pairs situation equal with rotor number of pole-pairs,
If the two quantity is inconsistent, need to introduce rotor number of pole-pairs PMotorAnd rotation becomes number of pole-pairs PRotation becomesThe angle turned over practical to rotor
Degree is modified.Rotor number of pole-pairs PMotorAnd rotation becomes number of pole-pairs PRotation becomesThe relationship of the two is,To
It is available：
Further, the method for the present embodiment further includes：According to the positive and negative values and back-emf letter of the rotation varying signal acquired
Number positive and negative values by the section for the practical angular transition turned over of angle and rotor to 0~360 ° that the rotor of estimation turns over.
Due to the limitation in arctan function period, need to judge θ and θ respectivelydPlace quadrant, and then convert to 0~
After 360 ° of angular interval, then carry out θ0It resolves.Wherein, the section of the angular transition rotor of estimation turned over to 0~360 °
It specifically includes：
When the rotation becomes cosine signal and rotation change excitation signal is in the same direction, the angle that the rotor estimated is turned over is made
The angle turned over for the rotor of final estimation；
When the rotation becomes, cosine signal becomes the excitation signal rotation change sinusoidal signal with the rotation and the rotation becomes
When excitation signal is in the same direction, the angle that the rotor estimated turns over is added into 180 ° of angles turned over as the rotor of final estimation
Degree；
When the rotation becomes cosine signal, reversed and the rotation change sinusoidal signal and the rotation become with rotation change excitation signal
When excitation signal is reversed, the angle that the angle that the rotor estimated turns over is subtracted 180 ° as the rotor of final estimation turns over
Degree.
That is, using following formula (6) by θdIt converts between 0~360 °：
Because of phase voltage UUWith UαPhase is identical, can be by judging UαAnd UβPositive and negative values, by the practical angle turned over of rotor
It converts to 0~360 ° of section, specifically includes：
When the second opposite potential signal be more than zero when, using the practical angle turned over of obtained rotor as finally
The practical angle turned over of rotor；
It, will be obtained when the second opposite potential signal is less than zero and the first opposite potential signal is less than zero
The practical angle turned over of rotor is plus 180 ° as the practical angle turned over of final rotor；
It, will be obtained when less than 0, the first opposite potential signal is more than zero to the second opposite potential signal
The practical angle turned over of rotor subtracts 180 ° as the practical angle turned over of final rotor.
That is, θ is converted between 0~360 ° using following formula (7)：
Above steps can be as shown in Figure 1 each structure execute, details are not described herein.
Based on same inventive concept, the utility model embodiment additionally provides a kind of zero-bit angle test system of rotary transformer
System, since the principle of the solved problem of the system is similar to the zero-bit angle test method of aforementioned rotary transformer, this method
Implementation may refer to the implementation of preceding method, overlaps will not be repeated.
Fig. 3 is that the structural schematic diagram of system is tested at the zero-bit angle for the rotary transformer that the utility model embodiment provides.Such as
Shown in Fig. 3, the utility model embodiment provides a kind of zero-bit angle test system of rotary transformer, including：
Signal acquisition module 301, the back-emf signal and rotary transformer of the arbitrary two-phase for obtaining tested motor
Rotation varying signal；The rotation varying signal includes that rotation becomes excitation signal, rotation becomes sinusoidal signal and rotation becomes cosine signal；
Angle estimation block 302, the quilt for determining estimation based on the rotation varying signal acquired in the signal acquisition module
The angle that the rotor of measured motor turns over；
Actual angle computing module 303 is used for the back-emf based on the arbitrary two-phase acquired in the signal acquisition module
Signal determines the three-phase back-emf signal of the tested motor, and is believed identified three opposite potential using transform method is preset
It number is handled to obtain the practical angle turned over of the rotor of tested motor；
Zero-bit angle determining module 304, the angle that the rotor of the estimation for determining the angle estimation block turns over
The practical angle turned over of rotor that the actual angle computing module calculates is subtracted each other, and using the difference subtracted each other as institute
State the zero-bit angle of rotary transformer.
Further, the angle estimation block 302 is specifically used for：Become excitation signal based on rotation and becomes excitation signal width with rotation
Value, rotation become excitation signal frequency and the first function relationship between the time, and rotation becomes sinusoidal signal and becomes excitation signal width with no-load voltage ratio, rotation
Value, rotation become second function relationship and rotation relict between the angle that excitation signal frequency, time and the rotor of estimation turn over
The angle that string signal and no-load voltage ratio, rotation become excitation signal amplitude, rotation becomes excitation signal frequency, time and the rotor of estimation turn over it
Between third functional relation, determine the angle that the rotor of the estimation turns over.
In the present embodiment, the default transform method converts for CLARKE；Actual angle computing module 303 is become using default
It changes method and identified three-phase back-emf signal is handled and include to obtain the practical angle turned over of the rotor of tested motor：
Three-phase back-emf signal based on 3 axis, the stator stationary coordinate system of 2 dimensions is converted by CLARKE, obtains the stator based on 2 axis
The two-phase back-emf signal of rest frame；The two-phase back-emf signal of the stator stationary coordinate system includes the first opposite potential
Signal and the second opposite potential signal；Based between three-phase back-emf signal and the practical angle turned over of voltage magnitude and rotor
Functional relation and obtained two-phase back-emf signal obtain the practical angle turned over of the rotor.
Further, system provided in this embodiment further includes correcting module 305, for the rotation pole-changing in rotary transformer
In the case of the rotor number of pole-pairs of logarithm and tested motor is unequal, number of pole-pairs and the rotor number of pole-pairs pair are become based on the rotation
The practical angle turned over of obtained rotor is modified.
Further, system provided in this embodiment further includes section conversion module 306, for being become according to the rotation acquired
The positive and negative values of signal and the positive and negative values of back-emf signal turn the practical angle turned over of angle and rotor that the rotor of estimation turns over
Shift to 0~360 ° of section.
Wherein, angular transition to 0~360 ° of the section that the rotor of estimation turns over is specifically included：When the rotation becomes cosine
When signal and rotation change excitation signal in the same direction, the angle that the rotor estimated turns over is turned over as the rotor of final estimation
Angle；It is encouraged with rotation change with the rotation change excitation signal rotation change sinusoidal signal when the rotation becomes cosine signal
When magnetic signal is in the same direction, the angle that the rotor estimated turns over is added into 180 ° of angles turned over as the rotor of final estimation；
When the rotation becomes cosine signal, reversed and the rotation change sinusoidal signal and the rotation become excitation signal with rotation change excitation signal
When reversed, the angle that the angle that the rotor estimated turns over is subtracted 180 ° as the rotor of final estimation turns over.
The practical angular transition turned over of rotor to 0~360 ° of section is specifically included：When second opposite potential is believed
Number be more than zero when, using the practical angle turned over of obtained rotor as the practical angle turned over of final rotor；When described
Two-phase back-emf signal is less than zero and when the first opposite potential signal is less than zero, by the practical angle turned over of obtained rotor
Degree is plus 180 ° as the practical angle turned over of final rotor；
It, will be obtained when less than 0, the first opposite potential signal is more than zero to the second opposite potential signal
The practical angle turned over of rotor subtracts 180 ° as the practical angle turned over of final rotor.
The function of above-mentioned each module can correspond to the respective handling step in flow shown in Fig. 2, and details are not described herein.
The utility model has the advantages that：It can online or off-line calculation rotation change zero-bit；Rotation need not be acquired
Encoder sin envelopes zero and back-emf signal zero crossing avoid noise and single zero crossing from testing the influence generated；Pass through
The data in continuous acquisition several periods, it is filtered can be to avoid the influence of test noise and harmonic wave；Suitable for motor number of pole-pairs
With initial angle testing scheme of rotation change number of pole-pairs when inconsistent.
Embodiment described above, only specific embodiment of the present utility model, to illustrate the technology of the utility model
Scheme, rather than its limitations, the scope of protection of the utility model are not limited thereto, although with reference to the foregoing embodiments to this practicality
It is novel to be described in detail, it will be understood by those of ordinary skill in the art that：Any technology people for being familiar with the art
Member within the technical scope disclosed by the utility model, can still modify to the technical solution recorded in previous embodiment
Or variation or equivalent replacement of some of the technical features can be readily occurred in；And these modifications, variation or replacement,
The spirit and scope for the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution should all cover at this
Within the protection domain of utility model.Therefore, the scope of protection of the utility model is answered described is with scope of the claims
It is accurate.
Claims (5)
1. a kind of zero-bit angle test device of rotary transformer, which is characterized in that including：Power plant, tested motor, rotation become
Depressor, transformer-supplied device, signal pickup assembly and signal conversion and processing unit；Wherein, the power plant with it is described
Tested motor connects, for driving the tested motor to desired speed；The rotary transformer is arranged in the tested motor
On, and connect with the transformer-supplied device and the signal pickup assembly；The signal pickup assembly is also tested with described
Arbitrary the two of motor are connected, and are connect with signal conversion and processing unit；The transformer-supplied device is used for as institute
It states rotary transformer and electric power is provided, the signal pickup assembly is used to acquire rotation varying signal and the institute of the rotary transformer output
It states the back-emf signal of the arbitrary two-phase of tested motor and the back-emf signal of acquisition is sent to the signal and convert and handle
Device is converted and is handled, to obtain the zero-bit angle of the rotary transformer；The rotation varying signal include rotation become excitation signal,
Rotation becomes sinusoidal signal and rotation becomes cosine signal.
2. the zero-bit angle test device of rotary transformer according to claim 1, which is characterized in that the signal acquisition dress
It is set to voltage sensor.
3. the zero-bit angle test device of rotary transformer according to claim 1, which is characterized in that the transformer-supplied
Device is that rotation becomes field circuit.
4. the zero-bit angle test device of rotary transformer according to claim 1, which is characterized in that signal conversion and
Processing unit includes sample circuit and signal processor；Wherein, the sample circuit is connect with the signal pickup assembly, is used for
The signal that the signal pickup assembly acquires is converted into workable signal and is sent to the signal processor.
5. the zero-bit angle test device of rotary transformer according to claim 1, which is characterized in that signal conversion and
Processing unit is channel wave tracer or oscillograph.
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| CN201820182076.4U CN207780217U (en) | 2018-02-02 | 2018-02-02 | A kind of zero-bit angle test device of rotary transformer |
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| CN201820182076.4U CN207780217U (en) | 2018-02-02 | 2018-02-02 | A kind of zero-bit angle test device of rotary transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196213A (en) * | 2018-02-02 | 2018-06-22 | 中国第汽车股份有限公司 | Zero-bit angle test device, the method and system of a kind of rotary transformer |
| CN109884523A (en) * | 2019-03-11 | 2019-06-14 | 重庆长安新能源汽车科技有限公司 | A kind of off-line test method and system of power drive system |
| CN111308248A (en) * | 2020-03-16 | 2020-06-19 | 湖南米艾西测控技术有限公司 | Resolver parameter testing analyzer |
| CN112234898A (en) * | 2020-10-12 | 2021-01-15 | 潍柴动力股份有限公司 | Method and system for testing initial angle of rotary transformer zero position and driving motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196213A (en) * | 2018-02-02 | 2018-06-22 | 中国第汽车股份有限公司 | Zero-bit angle test device, the method and system of a kind of rotary transformer |
| CN109884523A (en) * | 2019-03-11 | 2019-06-14 | 重庆长安新能源汽车科技有限公司 | A kind of off-line test method and system of power drive system |
| CN109884523B (en) * | 2019-03-11 | 2021-08-13 | 重庆长安新能源汽车科技有限公司 | Off-line detection method and system for electric drive system |
| CN111308248A (en) * | 2020-03-16 | 2020-06-19 | 湖南米艾西测控技术有限公司 | Resolver parameter testing analyzer |
| CN112234898A (en) * | 2020-10-12 | 2021-01-15 | 潍柴动力股份有限公司 | Method and system for testing initial angle of rotary transformer zero position and driving motor |
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