CN207882408U - Electric machine testing device - Google Patents
Electric machine testing device Download PDFInfo
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- CN207882408U CN207882408U CN201721922997.1U CN201721922997U CN207882408U CN 207882408 U CN207882408 U CN 207882408U CN 201721922997 U CN201721922997 U CN 201721922997U CN 207882408 U CN207882408 U CN 207882408U
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Abstract
The utility model discloses a kind of electric machine testing device, the electric machine testing device includes master control borad, driving motor, driving power and shaft coupling, first power end of master control borad and the positive terminal of driving power connect, and the negative pole end of driving power and the power input of driving motor connect；The power output end of driving motor and the second source end of master control borad connect；Driving motor is connect by shaft coupling with motor drive to be measured；The signal input part of master control borad is electrically connected with measured motor is waited for；Wherein, the electrical axis for determining driving motor with after the electrical axis of measured motor is concentric, master control borad driving driving motor is operated with the first preset rotation speed, and obtains the counter electromotive force for waiting for measured motor, with according to the corresponding detection signal of counter electromotive force output for waiting for measured motor got.The utility model is solved when testing counter electromotive force, since human factor causes test result inaccurate, and to be needed to carry out by manual operation, leads to the problem that testing efficiency is low by oscillograph.
Description
Technical field
The utility model is related to electronic circuit technology field, more particularly to a kind of electric machine testing device.
Background technology
The acquisition of counter electromotive force is most important for motor performance as the important link in motor driving.Currently, electric
The test mode of machine back-emf is that collected counter electromotive force data are shown that research staff is again by oscillograph mostly
The Wave data shown on oscillograph is read, and according to the test result read, artificial calculating is to wait for whether measured motor closes
Lattice, this test mode may be because that human factor causes test result inaccurate, and need to carry out by manual operation, survey
It is low to try efficiency.
Utility model content
The main purpose of the utility model is to propose a kind of electric machine testing device, it is intended to solve to test by oscillograph anti-
When electromotive force, since human factor causes test result inaccurate, and needs to carry out by manual operation, lead to testing efficiency
Low problem.
To achieve the above object, the utility model proposes a kind of electric machine testing device, the electric machine testing device includes master
Plate, driving motor, driving power and shaft coupling are controlled, the first power end of the master control borad connects with the positive terminal of the driving power
It connects, the negative pole end of the driving power is connect with the power input of the driving motor；The power supply of the driving motor exports
End is connect with the second source end of the master control borad；The driving motor is connect by the shaft coupling with motor drive to be measured；
The signal input part of the master control borad waits for that measured motor is electrically connected with described；Wherein,
The electrical axis for determining the driving motor with described after the electrical axis of measured motor is concentric, the master control borad
It drives the driving motor to be operated with the first preset rotation speed, and waits for the counter electromotive force of measured motor described in acquisition, got with basis
The corresponding detection signal of counter electromotive force output for waiting for measured motor.
Preferably, the master control borad includes master controller, motor-drive circuit, motor detection circuit to be measured, the master control
The control terminal of device processed is connect with the controlled end of the motor-drive circuit, the output end of the motor-drive circuit and described first
Power end connects, and the ground terminal of the motor-drive circuit is connect with the second source end, the motor detection circuit to be measured
Test side wait for that measured motor is connect with described, the signal of the output end for waiting for motor detection circuit and the master controller inputs
End connection.
Preferably, the motor detection circuit to be measured includes Hall sensor, counter electromotive force detection circuit unit, torsion biography
Sensor, the Hall sensor described wait for the electric current that measured motor generates under the driving effect of the driving motor for detecting；
The counter electromotive force detection circuit unit is used to detect the counter electromotive force for waiting for measured motor and generating；The torsion sensor is used for
The torsion that measured motor generates is waited for described in detection.
Preferably, the motor-drive circuit includes driving chip and inverter bridge, the input terminal of the driving chip and institute
The pwm signal output end connection of master controller is stated, the output end of the driving chip is connect with the controlled end of the inverter bridge, institute
The input terminal for stating inverter bridge is connect with the positive terminal of the driving power, the output end of the inverter bridge and the driving motor
Coil connects.
Preferably, the master control borad further includes for measuring the rotary transformer of the driving motor rotating speed, for measuring
The rotary encoder of the driving motor position, and for realizing the rotary transformer and the rotary encoder with it is described
The quadrature coding pulse circuit of driving circuit electrical connection, the rotary transformer and the rotary encoder and driving electricity
Road is connect through the quadrature coding pulse circuit with the driving motor.
Preferably, the master control borad further includes interface circuit, and the interface circuit includes serial line interface, Ethernet card interface
And USB interface；The serial line interface sets for realizing the master controller and the communication of external RS-232/RS-485/CAN agreements
Standby communication connection；The Ethernet card interface is for master controller to be connect with the communication apparatus communication of external ICP/IP protocol；
The master controller is connect by the USB interface with host computer, to realize the master controller and the host computer phase intercommunication
News.
Preferably, the master control borad further includes signal isolation circuit, and the signal isolation circuit is arranged in series in the master
Between controller and the interface circuit.
Preferably, the master control borad further includes touch display screen, input terminal and the output end difference of the touch display screen
It is connect with the master controller, the touch display screen is for receiving key command input by user, and by the key command
It is exported to the master controller after being converted to corresponding control signal.
Preferably, the master control borad further includes key circuit, the output end of the key circuit and the master controller
Push button signalling input terminal connects.
The utility model electric machine testing device provides work to control driving power by the way that master control borad is arranged for driving motor
Voltage, and under the gearing for passing through shaft coupling so that driving motor drive waits for that measured motor operates.And waiting for that measured motor driving
When being operated under the driving of motor, wait for that the rotor in measured motor rotates and the magnetic induction line in cutting stator winding, in stator
When a part of conductor of the closed circuit of winding does cutting magnetic induction line movement, obtained in the machine winding to be measured by master control borad
Counter electromotive force, and the counter electromotive force difference of the counter electromotive force and default counter electromotive force got is calculated further according to counter electromotive force
Difference whether in default counter electromotive force difference range, determine described in after whether measured motor qualified, qualified/unqualified detection of output
Signal.The utility model is solved through oscillograph come when testing counter electromotive force, since human factor causes test result inaccurate
Really, it and needs to carry out by manual operation, leads to the problem that testing efficiency is low.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the high-level schematic functional block diagram of the utility model electric machine testing device；
Fig. 2 is the high-level schematic functional block diagram of master control borad in Fig. 1；
Fig. 3 is the high-level schematic functional block diagram of motor-drive circuit in Fig. 2；
Fig. 4 is the functional module structure schematic diagram of motor detection circuit to be measured in Fig. 2；
Fig. 5 is the functional module structure schematic diagram of interface circuit in Fig. 2.
Drawing reference numeral explanation：
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is opposite between each component under a certain particular pose (as shown in the picture)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, will be understood that this technical side when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of electric machine testing devices.
Referring to figs. 1 to Fig. 5, in one embodiment of the utility model, which includes master control borad 100, driving
Motor 200, driving power 300 and shaft coupling 400, the first power end and the driving power 300 of the master control borad 100 are just
Extreme connection, the negative pole end of the driving power 300 are connect with the power input of the driving motor 200；The driving electricity
The power output end of machine 200 is connect with the second source end of the master control borad 100；The driving motor 200 passes through the shaft coupling
Device 400 is connect with motor drive to be measured；The signal input part of the master control borad 100 waits for that measured motor is electrically connected with described；Wherein,
The electrical axis for determining the driving motor with described after the electrical axis of measured motor is concentric, the master control borad
The 100 driving driving motors 200 are operated with the first preset rotation speed, and the counter electromotive force of measured motor is waited for described in acquisition, with basis
The corresponding detection signal of counter electromotive force output for waiting for measured motor got.
In the present embodiment, driving power 300 is DC power supply, and driving power 300 can be accumulator, ultracapacitor etc.
Energy storage device, can also be the power supply change-over device that exchange is converted to direct current by Switching Power Supply etc., and driving power 300 is used for
When master control borad 100 drives driving motor 200 to work, operating voltage is provided for driving motor 200.
Detecting that it is default that the distance of shaft centers between the electrical axis and the electrical axis for waiting for measured motor of driving motor 200 is less than
When distance of shaft centers threshold value, then it can determine that the electrical axis of the driving motor 200 waits for that the electrical axis of measured motor is concentric with described.
Control of the driving motor 200 based on master control borad 100, and rotated under the first preset rotation speed, the present embodiment first is pre-
If rotating speed is preferably 1350rpm.Shaft coupling 400 driving motor 200 and waits for measured motor for connecting, by driving motor 200 with
Wait for that measured motor couples securely, and when driving motor 200 operates, drive waits for that measured motor rotates together with.
It should be noted that waiting for that measured motor is cold during test, namely do not driven on its winding
Electric current and driving voltage.When being operated under driving of the measured motor in driving motor 200, waits for the rotation of the rotor in measured motor and cut
The magnetic induction line in stator winding is cut, thus when a part of conductor of the closed circuit of stator winding does cutting magnetic induction line movement,
It just will produce electric current on conductor, and voltage generated at the both ends of winding, which is counter electromotive force.Therefore, pass through acquisition
Terminal voltage in machine winding to be measured can obtain the counter electromotive force for waiting for measured motor, realize the detection of counter electromotive force of motor to be measured.
After getting the counter electromotive force, master control borad 100 can calculate the anti-of the counter electromotive force that gets and default counter electromotive force
The counter electromotive force is compared with default counter electromotive force threshold value, obtains a testing result by electromotive force difference, is tied by detecting
Fruit is that can determine whether that this waits for whether magnetizing for measured motor be qualified.When the counter electromotive force difference is outside default counter electromotive force difference range
When, then judge that machine winding to be measured is unqualified, it is on the contrary then qualified, and according to qualified/unqualified detection signal of judging result output.
The utility model electric machine testing device controls driving power 300 as driving motor 200 by the way that master control borad 100 is arranged
Operating voltage is provided, and by under the gearing of shaft coupling 400 so that the drive of driving motor 200 waits for that measured motor operates.And
When being operated under driving of the measured motor in driving motor 200, wait in measured motor rotor rotation and in cutting stator winding
Magnetic induction line, to when a part of conductor of the closed circuit of stator winding does cutting magnetic induction line movement, be obtained by master control borad 100
It takes the counter electromotive force in the machine winding to be measured, and calculates the anti-electronic of the counter electromotive force that gets and default counter electromotive force
Potential difference value further according to counter electromotive force difference whether in default counter electromotive force difference range, determine described in wait for whether measured motor qualified
Afterwards, qualified/unqualified detection signal of output.The utility model is solved through oscillograph come when testing counter electromotive force, due to people
Cause test result inaccurate for factor, and need to carry out by manual operation, leads to the problem that testing efficiency is low.
Referring to figs. 1 to Fig. 5, in a preferred embodiment, the master control borad 100 includes master controller 110, motor driving electricity
Road 120, motor detection circuit to be measured 130, the control terminal of the master controller 110 are controlled with the motor-drive circuit 120
End connection, the output end of the motor-drive circuit 120 are connect with first power end, the motor-drive circuit 120
Ground terminal is connect with the second source end, and the test side of the motor detection circuit 130 to be measured waits for that measured motor is connect with described,
The output end for waiting for motor detection circuit is connect with the signal input part of the master controller 110.
In the present embodiment, master controller 110 can be realized with microcontroller, can also be realized using microprocessors such as DSP,
The present embodiment is preferably realized using dsp controller.Algorithm device, comparator, signal processor etc. are integrated in master controller 110
The hardware circuits such as hardware circuit and memory, while being also integrated with for realizing control function, detection function in master controller 110
Software algorithm program and/or module, and by execute master control borad 100 various functions and processing data, to realize pair
Wait for the detection of the counter electromotive force of measured motor.Control of the motor-drive circuit 120 based on master controller 110, master controller 110 pass through
The pwm control signal of different duty is exported to motor-drive circuit 120, motor-drive circuit 120 is according to the pwm control signal
It is that driving motor 200 provides working power to control driving power 300.Motor detection circuit 130 to be measured is for detecting electricity to be measured
The counter electromotive force of machine, and the corresponding voltage signal of the counter electromotive force detected is exported to master controller 110, so that master controller
After 110 pairs of voltage signals carry out the signal processings such as operation, comparison, judgement waits for whether the counter electromotive force of measured motor reaches default anti-
Electromotive force value.It is understood that the arithmetic speed of master controller 110 is fast, testing result is accurate and intelligent, is not necessarily to artificial root
Testing result is calculated according to oscillograph, is conducive to the accuracy and detection efficiency that improve testing result, is suitable for criticizing
Measure the detection for waiting for measured motor of production.
Referring to figs. 1 to Fig. 5, further, in above-described embodiment, the motor detection circuit 130 to be measured is passed including Hall
Sensor 131, counter electromotive force detection circuit unit 132, torsion sensor 133, thus the electric machine testing device is in addition to that can detect
Except the counter electromotive force for waiting for measured motor, the parameters of electric machine such as the electric current for waiting for measured motor, torsion, and the electricity that will be got can also be detected
Machine parameter is exported to master controller 110.Wherein, the Hall sensor 131 described waits for measured motor in the driving for detecting
The electric current generated under the driving effect of motor；The counter electromotive force detection circuit unit 132 waits for that measured motor produces described in being used to detect
Raw counter electromotive force；The torsion sensor 133 is used to detect the torsion for waiting for measured motor and generating.It is understood that main
A/D signal conversion modules are integrated in controller 110, master controller 110 can be corresponding by the analog current signal received
After voltage signal and the corresponding analog voltage signal of torsion are converted into direct current signal, then corresponding voltage signal is transported
The signal processings such as calculate, analyze, comparing.
Referring to figs. 1 to Fig. 5, further, in above-described embodiment, intelligent power mould may be used in motor-drive circuit 120
Block integrated circuit realizes, can also using the discrete element group such as driving chip 121 and inverter bridge 122 at driving circuit come real
It is existing, or according to the driving voltage size of driving motor 200 and the number of phases of driving motor 200, directly by master controller 110 come
The ON/OFF for controlling driving switch works to control driving motor 200.The present embodiment is preferably using using driving chip 121
And the discrete element group such as inverter bridge 122 at driving circuit realize, wherein the motor-drive circuit 120 includes driving core
Piece 121 and inverter bridge 122, the input terminal of the driving chip 121 are connect with the pwm signal output end of the master controller 110,
The output end of the driving chip 121 is connect with the controlled end of the inverter bridge 122, the input terminal of the inverter bridge 122 and institute
The positive terminal connection of driving power 300 is stated, the output end of the inverter bridge 122 is connect with the coil of the driving motor 200.
Specifically, the pwm control signal that the master controller 110 received exports is amplified, is isolated by driving chip 121
Output is to inverter bridge 122 after processing, to drive corresponding switch conduction in inverter bridge 122, to which output driving current value drives
On motor 200 on corresponding winding, and control motor operating.
Referring to figs. 1 to Fig. 5, in a preferred embodiment, the master control borad 100 further includes for measuring the driving motor
The rotary transformer 141 of 200 rotating speeds, the rotary encoder 142 for measuring 200 position of the driving motor, and for real
The quadrature coding pulse electricity of the existing rotary transformer 141 and the rotary encoder 142 and driving circuit electrical connection
Road 143, the rotary transformer 141 and the rotary encoder 142 are with the driving circuit through quadrature coding pulse electricity
Road 143 is connect with the driving motor 200.
In the present embodiment, rotary encoder 142, rotary transformer 141 for obtain the current rotating speed of driving motor 200 and
Position, and the conversion of the current driving motor 200 got and position are exported to master controller 110, so that master controller 110
Adjust output voltage/output current of driving motor 200 in real time according to location information and conversion.
Referring to figs. 1 to Fig. 5, in a preferred embodiment, master control borad 100 further includes interface circuit 150, the interface circuit
150 include serial line interface 151, Ethernet card interface 152 and usb 1 53；The serial line interface 151 is for realizing the master
Controller 110 is connect with the communication apparatus communication of external RS-232/RS-485/CAN agreements；The Ethernet card interface 152 is used
In master controller 110 is connect with the communication apparatus communication of external ICP/IP protocol；The usb 1 53 connects the master control
Device 110 and host computer processed connect for realizing the master controller 110 and host computer communication.
In the present embodiment, by 152 connected with network cable of Ethernet card interface, to which host computer be connect with master controller 110
And realize communication, to configure data by upper for master controller 110, by USB cable connect master controller 110 with it is upper
Position machine, the function of the data of 110 data transmission of master controller can be realized by the usb 1 53, such as testing result is exported
To host computer, or the control instruction of host computer is received, the update of software program/module can also be carried out by host computer.RS-
The communication connection of master controller 110 and external communication device may be implemented in 232/RS-485/CAN agreements.
Referring to figs. 1 to Fig. 5, in a preferred embodiment, the master control borad 100 further includes signal isolation circuit 160, signal
Isolation circuit 160 can be arranged in series between master controller 110 and motor-drive circuit 120, synchronous signal isolation circuit 160
It can also be arranged in series between the master controller 110 and the interface circuit 150.
In the present embodiment, signal isolation circuit 160 for realizing master controller 110 and peripheral circuit signal isolation, with
It avoids the interference signal of peripheral circuit from being scurried into master controller 110 by ground wire, and influences the normal work of master controller 110.
Referring to figs. 1 to Fig. 5, in a preferred embodiment, the master control borad 100 further includes touch display screen 170, described to touch
The input terminal and output end for touching display screen 170 are connect with the master controller 110 respectively, and the touch display screen 170 is for connecing
Key command input by user is received, and is exported to the master controller after the key command is converted to corresponding control signal
110。
In the present embodiment, touch display screen 170 collect user on it or neighbouring touch operation (such as user use
The operation of any suitable object or attachment such as finger, stylus in touch display screen 170 or near touch display screen 170),
And corresponding attachment device is driven according to preset formula.Touch display screen 170 may include touch detecting apparatus and touch
Two parts of controller.Wherein, the touch orientation of touch detecting apparatus detection user, and the signal that touch operation is brought is detected,
Transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into touching
Point coordinates, then give master controller 110, and order that master controller 110 is sent can be received and executed, to realize user
The display of the relevant informations such as the input of key command and counter electromotive force, electric current, torque, and can be in touch display screen 170
Upper display electric machines test to be measured whether qualified information, it is not necessary that the intelligent measurement for treating measured motor can be realized by oscillograph,
To improve detection rates and accuracy.
Referring to figs. 1 to Fig. 5, in a preferred embodiment, the master control borad 100 further includes key circuit 180, the button
The output end of circuit 180 is connect with the push button signalling input terminal of the master controller 110.
In the present embodiment, key circuit 180 realizes switch key work(for receiving key command input by user and triggering
Can, such as machine open/close etc. meets the work requirements of master control borad 100 to coordinate the mutual use of other circuit modules.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (9)
1. a kind of electric machine testing device, which is characterized in that the electric machine testing device includes master control borad, driving motor, driving electricity
First power end of source and shaft coupling, the master control borad is connect with the positive terminal of the driving power, and the driving power is born
Extremely it is connect with the power input of the driving motor；The power output end of the driving motor and the second of the master control borad
Power end connects；The driving motor is connect by the shaft coupling with motor drive to be measured；The signal of the master control borad inputs
It holds and is electrically connected with measured motor is waited for；Wherein,
The electrical axis for determining the driving motor with described after the electrical axis of measured motor is concentric, master control borad driving
The driving motor is operated with the first preset rotation speed, and the counter electromotive force of measured motor is waited for described in acquisition, with according to the institute got
State the corresponding detection signal of counter electromotive force output for waiting for measured motor.
2. electric machine testing device as described in claim 1, which is characterized in that the master control borad includes master controller, motor drive
Dynamic circuit, motor detection circuit to be measured, the control terminal of the master controller are connect with the controlled end of the motor-drive circuit, institute
The output end for stating motor-drive circuit is connect with first power end, the ground terminal of the motor-drive circuit and described second
Power end connects, and the test side of the motor detection circuit to be measured waits for that measured motor is connect with described, described to wait for motor detection circuit
Output end connect with the signal input part of the master controller.
3. electric machine testing device as claimed in claim 2, which is characterized in that the motor detection circuit to be measured includes that Hall passes
Sensor, counter electromotive force detection circuit unit, torsion sensor, the Hall sensor described wait for measured motor described for detecting
The electric current generated under the driving effect of driving motor；The counter electromotive force detection circuit unit waits for that measured motor produces described in being used to detect
Raw counter electromotive force；The torsion sensor is used to detect the torsion for waiting for measured motor and generating.
4. electric machine testing device as claimed in claim 2, which is characterized in that the motor-drive circuit include driving chip and
Inverter bridge, the input terminal of the driving chip are connect with the pwm signal output end of the master controller, the driving chip it is defeated
Outlet is connect with the controlled end of the inverter bridge, and the input terminal of the inverter bridge is connect with the positive terminal of the driving power, institute
The output end for stating inverter bridge is connect with the coil of the driving motor.
5. electric machine testing device as claimed in claim 2, which is characterized in that the master control borad further includes for measuring the drive
Rotary transformer, the rotary encoder for measuring the driving motor position of dynamic motor speed, and for realizing described
The quadrature coding pulse circuit of rotary transformer and the rotary encoder and driving circuit electrical connection, the rotation become
Depressor and the rotary encoder are connect through the quadrature coding pulse circuit with the driving motor with the driving circuit.
6. electric machine testing device as claimed in claim 2, which is characterized in that the master control borad further includes interface circuit, described
Interface circuit includes serial line interface, Ethernet card interface and USB interface；The serial line interface for realizing the master controller with
The communication apparatus communication of external RS-232/RS-485/CAN agreements connects；The Ethernet card interface be used for by master controller with
The communication apparatus communication of external ICP/IP protocol connects；The master controller is connect by the USB interface with host computer, with reality
The existing master controller is mutually communicated with the host computer.
7. electric machine testing device as claimed in claim 6, which is characterized in that the master control borad further includes signal isolation circuit,
The signal isolation circuit is arranged in series between the master controller and the interface circuit.
8. electric machine testing device as claimed in claim 2, which is characterized in that the master control borad further includes touch display screen, institute
The input terminal and output end for stating touch display screen are connect with the master controller respectively, and the touch display screen is for receiving user
The key command of input, and exported to the master controller after the key command is converted to corresponding control signal.
9. the electric machine testing device as described in claim 2 to 8 any one, which is characterized in that the master control borad further include by
Key circuit, the output end of the key circuit are connect with the push button signalling input terminal of the master controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922997.1U CN207882408U (en) | 2017-12-29 | 2017-12-29 | Electric machine testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922997.1U CN207882408U (en) | 2017-12-29 | 2017-12-29 | Electric machine testing device |
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| CN207882408U true CN207882408U (en) | 2018-09-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942249A (en) * | 2017-12-29 | 2018-04-20 | 深圳市正德智控股份有限公司 | Electric machine testing device and method |
| CN109407004A (en) * | 2018-11-15 | 2019-03-01 | 广州汽车集团乘用车有限公司 | A kind of rotation becomes caliberating device and scaling method |
-
2017
- 2017-12-29 CN CN201721922997.1U patent/CN207882408U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942249A (en) * | 2017-12-29 | 2018-04-20 | 深圳市正德智控股份有限公司 | Electric machine testing device and method |
| CN109407004A (en) * | 2018-11-15 | 2019-03-01 | 广州汽车集团乘用车有限公司 | A kind of rotation becomes caliberating device and scaling method |
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