CN201237631Y - Linear electric motor performance parameter test device - Google Patents
Linear electric motor performance parameter test device Download PDFInfo
- Publication number
- CN201237631Y CN201237631Y CNU2008201093770U CN200820109377U CN201237631Y CN 201237631 Y CN201237631 Y CN 201237631Y CN U2008201093770 U CNU2008201093770 U CN U2008201093770U CN 200820109377 U CN200820109377 U CN 200820109377U CN 201237631 Y CN201237631 Y CN 201237631Y
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Abstract
The utility model discloses a performance parameter test device of a linear motor, belonging to the testing field of the linear motor. The test device comprises a base used for fixing the linear motor, an integrated tester used for carrying out data processing and testing the parameters, a control driving system used for driving and a computer used for final parameters; besides, the test device also comprises various sensors used for carrying out direct test. The utility model can test the parameters of current, voltage, efficiency, thrust, thrust fluctuation, temperature rise and the like by carrying out rated test, block test, starting test, counter electromotive force test and the like of the linear motor. The utility model is used for testing and evaluating the performance of the motor, assists to determine a proper control strategy, and simultaneously lays the foundation for further optimum design of the motor. By the test and calculation for the properties and the parameters of operating condition of the motor, the requirements to the performance evaluation of the linear motor can be met.
Description
Technical field
The utility model relates to the linear electric motors fields of measurement, particularly a kind of linear motor performance parameter test device.
Background technology
Linear electric motors are as a kind of New-type electric machine, have efficient height, bearing accuracy height, servo steadily, characteristic such as response sensitivity, therefore be applied to industry-by-industry more and more widely.But, can't guarantee the precision of the operation characteristic of linear electric motors, so carry out Performance Detection and just seem particularly important in process of production linear electric motors with to producing linear electric motors for finished product because of the also prematurity of making standard of linear electric motors at present.
As a rule, the performance parameter experimental test of linear electric motors comprises two aspects, i.e. performance test and reliability testing.Wherein performance test mainly is the test that the external characteristic that various operating condition showed of motor is carried out, and as thrust, efficient etc., has directly reflected the design effect and the real work performance of motor.
Fail-test is in order to measure, verify or improve product reliability and the test carried out that it is to guarantee the product important step of sex work reliably and with long-term.Statistics shows that the topmost failure mode of motor is the degradation failure of insulation system.In use promptly, insulation under the synergy of various stress, the inefficacy that causes of variation gradually of its intensity.Reliability problems relates to the vibrations that force oscillation causes, the uneven and high running performance parameters of mistake of temperature rise.
Domestic present do not formulate as yet complete the linear electric motors method of inspection and testing apparatus, basically all be to use existing equipment to carry out the test of some special parameters, and be to use for reference the corresponding method of electric rotating machine to draw up a plan for basically with relevant national standard according to the pattern and the occasion of used motor.These method of testings can't be tested at some concrete property of linear electric motors, and its test result also can't accurately reflect the serviceability of linear electric motors comprehensively.
Summary of the invention
For addressing the above problem, the utility model provides a kind of linear motor performance parameter test device, utilizes proving installation of the present utility model can test the multinomial performance parameter of linear electric motors.Described technical scheme is as follows:
A kind of linear motor performance parameter test device of the present utility model, it is characterized in that described device comprises pedestal, is embedded with the motor stator of winding coil, electric mover, comprehensive tester, control and drive system, main control computer and temperature sensor; Described motor stator is fixed on the described pedestal; Described electric mover is close to described motor stator and is movably housed on the described pedestal; Described control-driven system is connected with described comprehensive tester respectively with described temperature sensor; Described comprehensive tester also is connected with described main control computer; Described temperature sensor is fixed in the winding coil of the outside surface of described motor stator or described motor stator.
A kind of linear motor performance parameter test device of the present utility model is characterized in that described device also comprises the photoelectric sensor that is connected with described comprehensive tester; Described photoelectric sensor is the light activated element that is fixed on the electric mover; Accordingly, equidistant on the horizontal throw of described electric mover two above light emitting diodes are installed.
A kind of linear motor performance parameter test device of the present utility model is characterized in that described device also comprises pulling force sensor and fictitious load; Described fictitious load is placed on the described pedestal; One end of described pulling force sensor is fixedlyed connected with described fictitious load, and the other end is fixedlyed connected with described electric mover; Described pulling force sensor also is connected with comprehensive tester.
A kind of linear motor performance parameter test device of the present utility model is characterized in that the central processing unit spare of described comprehensive tester is a single-chip microcomputer.
A kind of linear motor performance parameter test device of the present utility model is characterized in that described comprehensive tester also comprises three-phase electrical energy computation chip, current transformer and voltage transformer (VT); Described three-phase electrical energy computation chip is connected respectively with described current transformer, voltage transformer (VT) and single-chip microcomputer.
A kind of linear motor performance parameter test device of the present utility model is characterized in that described comprehensive tester also comprises two A/D change-over circuits; Described A/D change-over circuit is connected with described single-chip microcomputer respectively.
A kind of linear motor performance parameter test device of the present utility model is characterized in that described comprehensive tester is connected with main control computer by serial communication interface.
The beneficial effect of the technical scheme that the utility model provides is: utilize proving installation of the present utility model can carry out various tests such as specified test, joggling test, starting characteristics test, back electromotive force test, directly obtain the parameter such as electric current, voltage, efficient, thrust, force oscillation, temperature rise of process of the test cathetus motor, and parameter such as back electromotive force, bearing accuracy, speed, acceleration; The utility model can also carry out the isoparametric test of operational efficiency under the different running frequencies in addition, in order to weighing the performance of linear electric motors, auxiliaryly determines by the suitable control strategy of measured motor, and then lays the foundation for the optimal design of motor.Linear motor performance parameter test device of the present utility model is affected easy, and measurement result is accurate, and is compatible high, can also carry out the test of other performances of linear electric motors by increasing other survey sensors.
Description of drawings
Fig. 1 is the structural representation of a kind of linear motor performance parameter test device of providing of the utility model;
Fig. 2 is the inner structure synoptic diagram of the comprehensive tester of a kind of linear motor performance parameter test device of providing of the utility model.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Referring to accompanying drawing 1, linear motor performance parameter test device of the present utility model mainly comprises linear electric motors to be measured, pedestal 1, comprehensive tester 5, control and drive system 4, main control computer 6 and various survey sensor.
The stator 2 of linear electric motors is rectangular and is fixed on the pedestal, is placed with linear motor rotor 3 at stator 2 upper surfaces of linear electric motors, and electric mover 3 is close to motor stator 2 and is movably housed on the pedestal 1; When linear motor stator electric 2 was connected with three-phase current, electric mover 3 can be made relative rectilinear motion on motor stator 2.
Front end at three-phase electrical energy computation chip 22 is connected with current transformer 25 and voltage transformer (VT) 26, and current transformer 25 is connected with control and drive system 4 respectively with voltage transformer (VT) 26, in order to gather electric current and magnitude of voltage from motor stator.
Control and drive system 4 are connected with comprehensive tester 5 with linear motor stator electric 2 respectively.Control and drive system 4 are driving arrangements of the present utility model, can be according to the voltage and the power of different test purpose adjustment output.Mains side installing current transformer 25 in control and drive system 4 links to each other with comprehensive tester together with the voltage extension line, thereby finishes the collection of electrical quantity; Simultaneously, control and drive system also provide driving power for tested linear electric motors.
Main control computer 6 receives the various measurement data that comprehensive tester 5 is sent here, and utilizes software to generate automatically according to measurement data and measure curve and chart; In addition, main control computer 6 can also further be analyzed and add up measurement result, and measurement data is stored into database.
Specify various performance test contents and scheme below in conjunction with accompanying drawing:
1, the temperature survey of motor
In the motor production run, need carry out temperature rise test to motor, to determine that motor generates heat normally in operational process from now on, can not cause motor overheating or other harmful effects.Simultaneously, in use also need motor temperature is detected, normally move to guarantee motor.
Temperature survey can be adopted electric-resistivity method, the direct current resistance of motor windings is along with temperature variation presents specific Changing Pattern, therefore can pass through to measure the direct current resistance of tested motor stator winding, and determine the medial temperature of winding according to its temperature variant relation.Simultaneously, can also be aided with temperature and directly measure for some mounting temperature sensor linear electric motors type eaily.
During measurement, temperature sensor 7 directly is attached to the outside surface of linear motor stator electric 2, measure variation of temperature after, temperature signal is sent into the A/D change-over circuit 23 of comprehensive tester 5, temperature signal is converted to digital signal, is admitted to single-chip microcomputer 21 again, finish the detection of surface temperature.Certainly,, also can when motor inserting-coil, temperature sensor 7 be imbedded in the winding coil, finish inside temperature measurement if measure winding temperature.
The motor windings material of linear electric motors mostly is copper, and the temperature rise of copper winding can draw according to following formula:
Wherein:
R
2Winding resistance when finishing for experiment;
R
1Winding resistance during for actual cold conditions;
θ
1For the actual cold conditions of correspondence is measured R
1The time winding temperature;
θ
0Coolant temperature when finishing for experiment.
Heating and the temperature variations of surveying the linear electric motors moving cell are the important steps of its thermal behavior of analysis and research.Study the influence size of thermal source on the one hand to the unit thermal deformation; Study the rectilinear motion unit on the other hand under the operational factor variable condition, the temperature of unit each point and situation of change.By experiment, can obtain the Temperature Distribution of system more accurately, for the appropriate design of high-speed straight-line moving cell structure with improve cooling system reference is provided.
2, motor speed is measured
The test of speed can pass through to measure the change in location of linear motor rotor, and then calculates the velocity amplitude of electric mover, measures the movement velocity of motor in the present embodiment by photoelectric sensor.Photoelectric sensor is the light activated element that is installed on the electric mover 3, and the light activated element of Cai Yonging is a photodiode here.On the horizontal throw of electric mover 3, arrange equidistantly plural light emitting diode 8 is installed.When test, motion along with electric mover 3, be fixed on the light path that the light activated element on the electric mover 3 blocks light emitting diode 8 one by one, thereby produce a series of pulse signals, and pulse signal sent in the comprehensive tester, can calculate the speed of motor movement according to time of the width of pulse and single-chip microcomputer timer record.
Also can adopt two photodiodes are fixed on the motor stator, light emitting diode is installed on mover, carry out timing with the single-chip microcomputer in the comprehensive tester, when light emitting diode is radiated on first photodiode, single-chip microcomputer picks up counting, and timing finishes when light emitting diode is radiated on second photodiode.In addition, can also adopt absolute grating chi to measure.
The method of computing velocity is
In the formula:
The speed of v-motor
Distance between C-two photodiode
The time of t-timer record
3, the mensuration of motor windings direct current resistance
Electrical quantity during the specified operation of motor comprises voltage, electric current, frequency, power, power factor, efficient etc., is the most basic parameter of motor, has directly reflected the operation conditions of motor, and has been the Fundamentals of Measurement of some other characterisitic parameters and curve.
The current value and the magnitude of voltage that utilize current transformer 25 in the comprehensive tester and voltage transformer (VT) 26 can measure linear electric motors can calculate the motor windings dc resistance then.When surveying winding D.C. resistance, added electric current should not surpass 10% of winding rated current, is no more than 1 minute conduction time; Read electric current and magnitude of voltage during measurement simultaneously; The direct current resistance of each phase winding should be measured under three kinds of different current values at least, and each measured value and mean value differ and should get the actual measured value of its mean value as resistance in scholar's 0.5% scope.
4, motor thrust test
Thrust is important techniques indexs of linear electric motors, and the general method of locked rotor test that adopts is tested in the time of actual the test, and what at this moment record is maximum thrust, that is to say dynamicthrust.The force oscillation coefficient has reflected the matching performance between motor and the driver and the stationarity of linear motor pushing force.This index is the main criterion of motor oscillating size, from the front Reliability Analysis, directly has influence on the life-span and the reliability of complete machine.
The method that the utility model is measured linear motor pushing force is to convert thrust to pulling force to measure.Fictitious load 10 is set on pedestal 1, and pulling force sensor 9 one ends and fictitious load 10 are fixing, and the other end and electric mover 3 are fixing, the pulling force of 3 pairs of fictitious loads 10 of electric mover when measuring motor movement with this.Before each test, adopt standard test weight that pulling force sensor 9 is demarcated.Comprehensive tester 5 converts the pulling force signal of pulling force sensor collection to electric signal by A/D change-over circuit 23, carries out next step analysis and calculating this electric signal being sent into single-chip microcomputer 21.Utilize comprehensive tester 5 can test, the situation of change of the static axial force of linear electric motors under different power voltage.Can obtain linear electric motors electric current-axial force characteristic by test, thus the static characteristics of clear and definite motor.
The thrust parameter is the important parameter of evaluation linear motor performance, can understand the inherent law of linear electric motors by the thrust test experiments, and its use is had crucial meaning.
5, linear electric motors efficiency test
With deceleration method testing of electric motors efficient, computing formula is as follows
In the formula:
The output power of P--motor
P
In--power input to a machine
Can obtain the output power of linear electric motors according to the motor thrust that measures and travelling speed; Linear electric motors power input P
InCan measure by comprehensive tester.
P＝Fv
In the formula:
The mechanical output power of P--motor
The motor thrust that F--records
The motor travelling speed of v-record
6, motor thrust jitter test
Motor thrust jitter test need be provided with laser interferometer in comprehensive tester, utilization laser interferometer and pulling force sensor, in a pole span scope, when the linear electric motors pulling force is carried out pointwise test, when the laser interferometer reading changed, the pulling force that is recorded by pulling force sensor was the force oscillation value of this point of linear electric motors.
Force oscillation is the principal element that influences linear motor performance, and it is caused that by limit end power, teeth groove power and the normal direction suction of linear electric motors these force oscillations are main causes that linear electric motors produce noise and vibration, can worsen its operation characteristic; The thrust shake can cause the motor deviation position, even produces concussion and unstable, reduces the mission life of motor driver electronic devices and components.The force oscillation of the reality of detection of straight lines motor helps improvement and the optimization to system by experiment.
Can also utilize the utility model linear motor performance parameter test device that tested linear electric motors are carried out other tests according to actual needs, only need that corresponding testing sensor is installed in addition and in comprehensive tester, import corresponding software programs to get final product.
Linear motor performance parameter test device of the present utility model can utilize various sensors directly to measure fundamental performance parameters such as the electric current of linear electric motors, voltage, thrust, temperature, and then determine the performances such as heating, temperature variation, promotion ability, power, thrust shake, movement velocity of tested linear electric motors, can make accurate evaluation to the combination property of linear electric motors.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1, a kind of linear motor performance parameter test device is characterized in that, described device comprises pedestal, is embedded with the motor stator of winding coil, electric mover, comprehensive tester, control and drive system, main control computer and temperature sensor; Described motor stator is fixed on the described pedestal; Described electric mover is close to described motor stator and is movably housed on the described pedestal; Described control-driven system is connected with described comprehensive tester respectively with described temperature sensor; Described comprehensive tester also is connected with described main control computer; Described temperature sensor is fixed in the winding coil of the outside surface of described motor stator or described motor stator.
2, a kind of linear motor performance parameter test device according to claim 1 is characterized in that described device also comprises the photoelectric sensor that is connected with described comprehensive tester; Described photoelectric sensor is the light activated element that is fixed on the electric mover; Accordingly, equidistant on the horizontal throw of described electric mover two above light emitting diodes are installed.
3, a kind of linear motor performance parameter test device according to claim 1 and 2 is characterized in that described device also comprises pulling force sensor and fictitious load; Described fictitious load is placed on the described pedestal; One end of described pulling force sensor is fixedlyed connected with described fictitious load, and the other end is fixedlyed connected with described electric mover; Described pulling force sensor also is connected with comprehensive tester.
4, a kind of linear motor performance parameter test device according to claim 1 is characterized in that, the central processing unit spare of described comprehensive tester is a single-chip microcomputer.
5, a kind of linear motor performance parameter test device according to claim 4 is characterized in that described comprehensive tester also comprises three-phase electrical energy computation chip, current transformer and voltage transformer (VT); Described three-phase electrical energy computation chip is connected respectively with described current transformer, voltage transformer (VT) and single-chip microcomputer.
6, a kind of linear motor performance parameter test device according to claim 4 is characterized in that, described comprehensive tester also comprises two A/D change-over circuits; Described A/D change-over circuit is connected with described single-chip microcomputer respectively.
7, a kind of linear motor performance parameter test device according to claim 1 is characterized in that described comprehensive tester is connected with main control computer by serial communication interface.
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| CNU2008201093770U CN201237631Y (en) | 2008-07-22 | 2008-07-22 | Linear electric motor performance parameter test device |
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