CN106226663A - A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor - Google Patents
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor Download PDFInfo
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- CN106226663A CN106226663A CN201610697968.3A CN201610697968A CN106226663A CN 106226663 A CN106226663 A CN 106226663A CN 201610697968 A CN201610697968 A CN 201610697968A CN 106226663 A CN106226663 A CN 106226663A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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Abstract
The invention discloses a kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor, solve waveform rising and falling time when output waveform in prior art is nonstandard, parallel multiplex sample is aging puncture with sample and the problem that changes.The present invention includes master control system, push-pull type switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit and testing jig.Design science of the present invention is reasonable, simple operation, when having that output waveform meets IEC60034 18 41 and IEC 60,034 18 42 standard, simultaneously test multichannel sample in parallel is aging waveform rising and falling time puncture one by one with sample and immovable feature, possess prominent substantive distinguishing features and the most progressive.
Description
Technical field
The present invention relates to a kind of test equipment, be specifically related to one and can realize the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor
Equipment.
Background technology
The fast development of frequency conversion drive based on pulsewidth modulation (PWM) technology has promoted extensive in every profession and trade of frequency conversion motor
Application, variable frequency drive motors plays the most important role in national economy.But, frequency conversion motor insulation by high frequency,
Fast-changing repetition pulse effect, electric stress is harsher on the impact more sinusoidal power frequency electric stress of insulation life, big quantitative change
Frequently motor occurs that not up to projected life is with regard to the phenomenon of premature deterioration.Utilize and repeat high-voltage square-wave, the test frequency conversion motor insulation longevity
Order and improve frequency conversion motor insulation system, have important practical significance to improving frequency conversion motor operation stability.
The pulse voltage of converter output ns level change, runs into natural impedance after connecting motor and does not mates, it may occur that wave refraction
And reflection.Steep rising edge produces spike reflected voltage and is superimposed upon in high-voltage square-wave pulse, continuous print side in frequency conversion motor end
Wave impulse has the strongest impact to stator winding insulation, and the shelf depreciation produced under pulse voltage corrodes the part of insulation system
Region, accelerates frequency conversion motor failure of insulation process.
Carrying out insulation system Inverter fed motor test under high-frequency impulse needs the repetition with hf and hv pulse output high
Pressure square wave system.In IEC60034-18-41 and IEC60034-18-42 standard, it is desirable at research electric rotating machine insulant electricity
When senile experiment and test analysis shelf depreciation, use repetition high-voltage square-wave voltage that frequency conversion motor insulation system is carried out Inverter fed motor
With partial discharge inception voltage test, simultaneously to repeat high-voltage square-wave voltage waveform parameter (peak-to-peak value, dutycycle, frequency, on
Rise time, waveform symmetry) it is described.GB/T21707-2008 frequency control special three-phase asynchronous motor isolation specifications, also
The impulse waveform of material Inverter fed motor test is described and advises.
Existing pulse square wave-generator exists and can not meet standard simultaneously and required and (be then unsatisfactory for ripple as met rising edge
Shape is symmetrical, meet waveform symmetry then voltage zero-cross exists dead band, meeting voltage, to rise the most then load capacity little etc.), thus
Different pulse square wave-generators carry out the tests such as voltage ageing experiment, shelf depreciation test, Inverter fed motor life test to same material
Time, its test data often have the biggest dispersibility, and the insufficient result of test comparison does not have cogency.
In order to improve in Inverter fed motor test and the efficiency of voltage ageing process, it is common practice that the road produced is exported external
Multiple test models.The high-voltage square-wave rise time owing to controlling is to be determined by the time constant of electric capacity and resistance, and style exists
The probability simultaneously punctured in ageing process is minimum, and after a certain road style punctures, load total capacitance numerical value will change, if not
Controlling to access the resistance in loop, the rise time will change, i.e. reduce.When waveform after changing is risen by residue style
Continuing aging under between, owing to the rise time reduces, be no longer considered waveform rise time, the aging life-span therefore obtained will
Will not accurately react the truth of style.Ensure multichannel style the most aging time apply square wave rise time and under
The fall time punctures one by one with sample and does not changes, and becomes skilled artisan's problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is: provides a kind of and realizes the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor
Equipment, this equipment has output waveform, and to meet IEC60034-18-41 and IEC60034-18-42 standard, simultaneously test in parallel many
When road sample is aging waveform rising and falling time puncture one by one with sample and immovable feature.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of realize multichannel frequency conversion motor electromagnetic wire Inverter fed motor test equipment, it is characterised in that include master control system,
Push-pull type switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit, testing jig and calorstat, wherein:
Testing jig, for the fixing tested frequency conversion motor electromagnetic wire being equivalent to equipment total load capacitance, its quantity is two
Above and use parallel connection mode be attached；Meanwhile, each testing jig is respectively provided with the ground test of Hi-pot test electrode and ground connection
Electrode；
Calorstat, is used for controlling Inverter fed motor test environment temperature, and all testing jigs are arranged in calorstat；
Overcurrent protection sensing circuit, simultaneously with master control system, push-pull type switching logic control circuit and all testing jigs
Hi-pot test electrode connects, and for detecting the breakdown state of style in test process, and test result feeds back to master control system
System；
Push-pull type switching logic control circuit, is connected with master control system, for exporting high pressure to overcurrent protection sensing circuit
Square wave, and according to the test result of overcurrent protection sensing circuit feedback, when certain tested frequency conversion motor electromagnetic wire is by voltage breakdown
And after respective load electric capacity is removed, adjust self total resistance value, to guarantee equipment driving of master control system under control
All-in resistance is constant with the product of total load capacitance R × C, it is achieved the normal Inverter fed motor test of remaining tested frequency conversion motor electromagnetic wire；
High-voltage probe, is connected with overcurrent protection sensing circuit and oscillograph simultaneously, and ground connection, is used for obtaining tested variable-frequency electric
The high-voltage square wave signal of solenoid, and decayed to export to oscillograph after 1000 times and carry out waveform and show.
Specifically, described master control system includes MCU, the human-computer interaction terminal being connected with this MCU, uses serial ports RS232
Agreement and this MCU communicate and the FPGA of exportable TTL signal, and simultaneously with this FPGA and push-pull type switching logic control
Circuit processed connects, for TTL signal exports after digital-to-analogue conversion the D/A module to push-pull type switching logic control circuit；Described
Overcurrent protection sensing circuit and push-pull type switching logic control circuit are connected with FPGA simultaneously.
Specifically, described overcurrent protection sensing circuit includes identical with testing jig quantity and connects one to one suddenly
That sensor, and overcurrent protector that is identical with Hall element quantity and that connect one to one；With institute while of described FPGA
Some Hall elements and overcurrent protector connect；Described push-pull type switching logic control circuit and high-voltage probe all simultaneously with institute
Some overcurrent protectors connect.
Specifically, described push-pull type switching logic control circuit includes that the first high direct voltage for producing positive high voltage is defeated
Going out assembly, for producing the second high direct voltage output precision of negative dc high voltage, quantity is overcurrent protector twice and low-voltage line
The high-voltage relay that circle is connected with FPGA, and connect one to one high-voltage relay one end identical with high-voltage relay quantity
Noninductive resistance on high-voltage contact, and be connected with D/A module and use the semiconductor solid-state of half bridgepush pull structure to switch；Described
First high direct voltage output precision is connected with the high-voltage contact of the high-voltage relay other end of half quantity simultaneously, and via correspondence
Noninductive resistance access semiconductor solid-state switch one of them input；Described second high direct voltage output precision and second half
The high-voltage contact of the high-voltage relay other end connect, and access another of semiconductor solid-state switch via corresponding noninductive resistance
Individual input；The outfan of described semiconductor solid-state switch is connected with all of overcurrent protector simultaneously.
More specifically, described first high direct voltage output precision includes the adjustable positive extra-high voltage being connected with high-voltage relay
DC source, and be connected with this adjustable positive pole high-voltage DC power supply and the first storage capacitor of ground connection.
More specifically, described second high direct voltage output precision includes the adjustable negative extra-high voltage being connected with high-voltage relay
DC source, and be connected with this adjustable negative extra-high voltage DC source and the second storage capacitor of ground connection.
As preferably, the model of described adjustable positive pole high-voltage DC power supply and adjustable negative extra-high voltage DC source is
HAPS06-10K。
As preferably, the model of described MCU and FPGA is respectively STC12C5A60S2 and EP4CE10F17C8.
As preferably, described semiconductor solid-state switch is the semiconductor solid-state switch of push-pull type structure.
The design principle of the present invention is, by arranging high-voltage relay and nothing in push-pull type switching logic control circuit
Equipment all-in resistance is adjusted by sensing resistor so that during multichannel sample in parallel is tested at the same time, when total as equipment
While the tested sample of load capacitance is punctured one by one, according to " rise or fall time of output square wave is by electricity total in equipment
Product R × the C of resistance and total load capacitance determines " this characteristic, it is total that push-pull type switching logic control circuit adjusts self automatically
Resistance value, it is ensured that the all-in resistance of equipment is constant with the product of total load capacitance R × C, thus reaches to test voltage in circuit
Waveform rising and falling time puncture one by one with sample and immovable purpose.
Compared with prior art, the method have the advantages that
(1) present invention arranges multiple testing jig in parallel, and by rational circuit structure design, thus be possible not only to
Test multiple sample simultaneously, significantly save time and the cost of labor of test, and it can be avoided that in single channel sample testing mistake
Journey is tested data the phenomenon that dispersibility is big easily occurs.
(2) present invention uses the half-bridge circuit that semiconductor solid-state switchs, and high-voltage square-wave exports from half-bridge upper and lower brachium pontis center
Square wave, square wave is symmetrical, and no-voltage zero passage dead band, so uses the present invention to carry out frequency conversion motor electromagnetic wire Inverter fed motor life test
Will be more accurate.
(3) present invention passes through overcurrent protector, and while tested sample is punctured one by one, corresponding overcurrent protector is successively
The circuit of breakdown testing jig belonging to disconnecting, to prevent in the present invention each device breakdown and cause damage with tested sample.
(4) present invention arranges one by arranging at the two poles of the earth of all testing jigs on the testing jig circuit of high-voltage probe Bing Mei road
Individual Hall element, and high-voltage probe is set is connected with oscillograph in test circuit, all Hall elements are connected with FPGA,
Consequently, it is possible to during tested sample starts to test until being punctured one by one, each road tested sample in test and is hit
When wearing, the voltage in circuit and current information carry out continual collection so that each road tested sample square-wave voltage peak-to-peak value,
Square-wave voltage dutycycle, square-wave voltage frequency can be observed the most intuitively in oscillograph；And when circuit Zhong Mou road is tested
When sample is breakdown, FPGA can find and process the electric current that the Hall element corresponding with this road tested sample is transmitted exactly
Information, and control push-pull type switching logic control circuit and the overcurrent protector corresponding with breakdown testing jig are made in time
Corresponding adjustment.
(5) present invention arranges FPGA and is programmed TTL signal, and transmits TTL signal by D/A module, to realize half-and-half
The control of conductor solid-state switch, so can be to the frequency in the high-voltage square-wave waveform parameter of quasiconductor solid-state switch output and duty
Ratio is effectively controlled；By high-voltage relay and overcurrent protector are directly controlled by FPGA, can the most efficiently
Control overcurrent protector and cut off breakdown test electrode group circuit corresponding thereto, and control high-voltage relay in tested sample
To the regulation testing circuitous resistance when being punctured one by one；Pulse is regulated by FPGA regulation both positive and negative polarity high-voltage DC power supply voltage
Square-wave voltage peak-to-peak value, so that the high-voltage square-wave waveform that the present invention is loaded into tested sample two ends in test process can be expired
All standards to test waveform in foot IEC60034-18-41, IEC60034-18-42 and GB/T21707-2008.
(6) switch during being switched fast due to semiconductor solid-state, when it is to capacitive load quick charge and electric discharge
Can produce up to tens of Ampere currents in switch switching moment, and the output waveform rise time is the shortest, switching electric current is more in short-term
Greatly, therefore, the present invention is by respectively arranging a storage capacitor, wherein, adjustable both positive and negative polarity at adjustable both positive and negative polarity high-voltage DC power supply
High-voltage DC power supply carries out low current charge to storage capacitor, and storage capacitor then can carry out quick charge to loading big electric current,
The idle problem of circuit is caused because the electric current of high-voltage DC power supply output is limited consequently, it is possible to just can be prevented effectively from.
(7) present invention is in operation, can directly by set every test parameter by human-computer interaction terminal to
MCU assigns instruction, and the operation making the present invention is simpler convenient, improves the efficiency of test.
(8) present invention is additionally provided with calorstat, and all of testing jig is arranged in this calorstat, can realize test environment
The regulation of temperature, thus improve the accuracy of present invention test further.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the present invention.
Fig. 2 is the square wave schematic diagram of display on oscillograph of the present invention.
Fig. 3 is semiconductor solid-state switch and output square wave schematic diagram thereof in the present invention.
Detailed description of the invention
The invention will be further described with embodiment in explanation below in conjunction with the accompanying drawings, and the mode of the present invention includes but not only limits
In following example.
Embodiment
As shown in Figures 1 to 3, the present invention is to provide a kind of realize multichannel frequency conversion motor electromagnetic wire Inverter fed motor test set
Standby, including master control system, push-pull type switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit and test
Frame.
Described master control system, as the logic control core of the present invention, is used for controlling each equipment and circuit work, with
Realize the Inverter fed motor test of multichannel frequency conversion motor electromagnetic wire.This master control system includes MCU, and the man-machine interaction being connected with this MCU is eventually
End, uses serial ports RS232 agreement and this MCU to communicate and the FPGA of exportable TTL signal, and simultaneously with this FPGA and
Push-pull type switching logic control circuit connects, for being exported after digital-to-analogue conversion by TTL signal to the control of push-pull type switching logic
The D/A module of circuit.
Described testing jig is used for fixing tested frequency conversion motor electromagnetic wire (being equivalent to the total load capacitance of equipment), its quantity
Being five, and all testing jigs are in parallel, meanwhile, each testing jig is respectively provided with the ground test electrode of Hi-pot test electrode and ground connection.
Described overcurrent protection sensing circuit is for tested frequency conversion motor electromagnetic wire on-load voltage, so that it is carried out resistance to electricity
Dizzy test, and test result is fed back to master control system.Specifically, the overcurrent protection sensing circuit in the present embodiment includes five
The individual Hall element connected one to one with testing jig, and five connect one to one and low by one with Hall element
The overcurrent protector that voltage source is powered；Described FPGA is connected with all of Hall element and overcurrent protector simultaneously；Described height
Pressure probe is connected with all of overcurrent protector simultaneously.
Described push-pull type switching logic control circuit is used for exporting high-voltage square-wave to overcurrent protection sensing circuit, and according to mistake
The test result of stream protection sensing circuit feedback, when certain tested frequency conversion motor electromagnetic wire is by voltage breakdown and respective load electric capacity
After being removed, adjust self total resistance value, to guarantee all-in resistance and the total load of equipment driving of master control system under control
The product (i.e. R × 5C) of electric capacity is constant, it is achieved the normal Inverter fed motor test of remaining tested frequency conversion motor electromagnetic wire.Specifically,
Described push-pull type switching logic control circuit includes the first high direct voltage output precision for producing positive high voltage, is used for producing negative
Second high direct voltage output precision of high direct voltage, quantity be ten and low-voltage coil connect with FPGA and as by low tension
Source is the high-voltage relay that low-voltage coil is powered, and ten and high-voltage relay one_to_one corresponding are also connected to high-voltage relay one end
High-voltage contact on noninductive resistance, and be connected with D/A module and use the semiconductor solid-state of half bridgepush pull structure to switch.
Say further, with five high-voltage relay other ends while that described first DC voltage and current output precision including
The adjustable positive pole high-voltage DC power supply that connects of high-voltage contact, and is connected also ground connection with this adjustable positive pole high-voltage DC power supply
First storage capacitor.Adjustable positive pole high-voltage DC power supply accesses semiconductor solid-state switch therein via corresponding noninductive resistance
Individual input.The second described high direct voltage output precision then include simultaneously the most respective with other five high-voltage relays another
The adjustable negative extra-high voltage DC source that the high-voltage contact of end connects, and be connected with this adjustable negative extra-high voltage DC source and ground connection
The second storage capacitor.Adjustable negative extra-high voltage DC source accesses another of semiconductor solid-state switch via corresponding noninductive resistance
Individual input.
Described high-voltage probe is connected with oscillograph, and ground connection, and it is for obtaining the high pressure of tested frequency conversion motor electromagnetic wire
Square-wave signal, and decayed to export to oscillograph after 1000 times and carry out waveform and show, as shown in Figures 2 and 3, the present invention is surveying
The high-voltage square-wave waveform high-voltage square-wave ripple that export default with semiconductor solid-state switch that during examination, oscillograph receives and demonstrates
Shape is consistent, has reached the standard to test waveform in IEC60034-18-41 and IEC60034-18-42.
Additionally, the present invention is also provided with a calorstat, all of testing jig is both placed in this calorstat, and calorstat can
Realize the regulation of test environment temperature, in order to improve the degree of accuracy of equipment test further.
In the present embodiment, the parameter situation of part of devices is as follows:
(1) parameter of positive pole high-voltage DC power supply (PHVDC) is:
Output parameter: the highest output DC voltage 10kV, maximum output current 60mA；Degree of regulation: voltage 1V, electric current
0.1mA, constant pressure and flow continuously adjustabe；Interprogram communication agreement: RS232 and RS485；Concrete model: Hangzhou enlightening sends power supply HAPS06-
10K high-voltage DC power supply.
(2) parameter of negative pole high-voltage DC power supply NHVPC is:
Output parameter: the highest output DC voltage 10kV, maximum output current 60mA；Degree of regulation: voltage 1V, electric current
0.1mA.Constant pressure and flow continuously adjustabe；Interprogram communication agreement: RS232 and RS485；Concrete model: Hangzhou enlightening sends power supply HAPS06-
10K high-voltage DC power supply.
The parameter of (3) first and second storage capacitors is:
Electric parameter: the highest 6.3kV of resistance to DC voltage, capacity 0.22uF；Lead: nut M6；Medium material: poly-third
Alkene film；Concrete model: MKPH-SG-6300VDC-0.22UF.
(4) parameter of high-voltage relay is:
High-voltage contact parameter: maximum pressure 10kV, maximum switching voltage DC 7.5kV, maximum switching electric current 2A；Low-voltage line
Circle parameter: rated operational voltage DC12V, rated current 60mA；Setup Type: PCB straight cutting is installed；Concrete model: LRL-102-
100PCV。
(5) parameter of noninductive resistance is:
Electric parameter: peak power 5W, single proof voltage DC500V；Medium material: cement, Wound-rotor type, without inductance value；Peace
Dress type: the vertical installation of PCB straight cutting.
(6) parameter of semiconductor solid-state switch is:
Electric parameter: maximum working voltage 8kV, peak inrush current 60A, it is internally integrated low-voltage driving；Triggering signal:
TTL signal；Construction of switch: half bridgepush pull structure.
(7) parameter of calorstat is:
Adjustable temperature scope: 0～300 DEG C.
(8) parameter of high-voltage probe is:
Attenuation ratio: 1000:1, concrete model: Tektronix P6015.
(9) parameter of D/A module is:
The dual pathways, 12bit, parallel, 100Msps sample rate.
(10) parameter of FPGA is:
Model EP4CE10F17C8, possesses RS232 peripheral interface.
(11) parameter of human-computer interaction terminal is:
Industrial control touch screen, terminal models is that prestige synthetic fibre leads to MT8101iE.
(12) parameter of MCU is:
Model STC12C5A60S2, possesses serial ports RS232 agreement, possesses MODBUS agreement and Industry Control screen or computer expert
Letter.
Implementing procedure with regard to the present embodiment does a brief description below:
1. start, initiating hardware parameter；
Initialize content: setting 5 passage contract fullys, setting voltage is 0, set high-voltage square-wave and be output as closed mode,
Set the original frequency of high-voltage square-wave as 50Hz, dutycycle as 50%；
2. configuration uses passage
Select the passage needing to export high-voltage square-wave on the touchscreen, open it；The data that MCU inputs according to touch screen
Open the high-voltage relay of corresponding output channel, select the resistance value needing to access to pass through high-voltage relay according to input information simultaneously
Device switches；
3. set high-voltage square-wave parameter
Set output square wave peak-to-peak value, frequency, dutycycle on the touchscreen；Shape information is transferred to by MCU by RS232
FPGA carries out exporting corresponding TTL signal；
4. set high-voltage square-wave output state
Setting high-voltage square-wave output state on the touchscreen as open mode, MCU controls high-voltage relay and connects quasiconductor
The low-voltage control power of solid-state switch, high-voltage square-wave power supply brings into operation.
5. timing starts
After high-voltage square-wave output state is open mode, the passage that touch screen sets output high-voltage square-wave proceeds by
Timing.
6. timing stops
Certain road over-current signal that protection circuit detects will be kept by signal processing circuit, and it is steady that MCU collects this
After fixed signal, this road high-voltage relay of control is turned off, the sample punctured is removed from circuit.Repeat the 6th and the 7th step, directly
Breakdown to all samples, timing stops, and closes power supply output.
The present invention is when multichannel tested sample is tested simultaneously, and a certain tested sample increases at breakdown immediate current, and this
Invent this state of reaction that the current foldback circuit arranged can be sensitive, produce the voltage signal of a sudden change；In the present invention, by
The over-current signal hit in tested sample is moment non-continuous, and therefore this circuit design signal keeps after triggering and resets
Function, and for ensure controller digital processing when with analogue signal realize electrical isolation, devise light coupling signal every
From, the enable signal of output channel is selected by the signal relay of employing, have employed special purpose driver ULN2003 and realizes
Driving to high-voltage relay controls.
The present invention is to realize program control to high-voltage DC power supply, have employed FPGA and controls positive and negative by RS232 agreement simultaneously
High direct voltage DC power output voltage, for realizing reaching the frequency in the high-voltage square-wave waveform parameter exported, dutycycle
The requirement of IEC60034-18-41 and IEC60034-18-42 standard, have employed FPGA and is programmed TTL signal, external one
DA digital to analog converter output TTL triggers signal；The present invention, for providing a personal-machine mutual interface, have employed what MCU realized
MODBUS agreement and Industry Control screen or compunlcation, MCU uses serial ports RS232 agreement to communicate with FPGA simultaneously；And be
Meet equipment test needs, have employed 220V Switching Power Supply and low-pressure section be powered, supply voltage is DC5V, DC12V,
DC24V。
Present invention employs the control technology and equipment that existing application is ripe, and by these skills by the way of scientific and reasonable
Art and equipment are combined, thus test while achieving multichannel frequency conversion motor electromagnetic wire Inverter fed motor well, and in test
Time its output waveform meet the standard of IEC60034-18-41 and IEC60034-18-42, and test multichannel examination in parallel at the same time
When sample is aging, waveform rising and falling time punctures one by one with sample and does not changes, and has filled up this technical field sky in this respect
In vain.The present invention not only measuring accuracy is high, output waveform meets international standard, multichannel tested sample is carried in after the most breakdown
The waveform rising and falling time of residue tested sample does not changes, and simple operation, therefore, it compared with prior art has
Standby prominent substantive distinguishing features and marked improvement.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit the protection model of the present invention
Enclosing, all body design thought in the present invention and the change having no essential meaning made mentally or polishing, it is solved
Technical problem is the most consistent with the present invention, within all should being included in protection scope of the present invention.
Claims (9)
1. the equipment that can realize the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor, it is characterised in that include master control system, push away
Pull switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit, testing jig and calorstat, wherein:
Testing jig, for the fixing tested frequency conversion motor electromagnetic wire being equivalent to equipment total load capacitance, its quantity is two or more
And use the mode of parallel connection to be attached；Meanwhile, each testing jig is respectively provided with the ground test electrode of Hi-pot test electrode and ground connection；
Calorstat, is used for controlling Inverter fed motor test environment temperature, and all testing jigs are arranged in calorstat；
Overcurrent protection sensing circuit, simultaneously with master control system, push-pull type switching logic control circuit and the high pressure of all testing jigs
Test electrode connects, and for detecting the breakdown state of style in test process, and test result is fed back to master control system；
Push-pull type switching logic control circuit, is connected with master control system, for exporting high-voltage square-wave to overcurrent protection sensing circuit,
And according to the testing result of overcurrent protection sensing circuit feedback, when certain tested frequency conversion motor electromagnetic wire is by voltage breakdown and corresponding
After load capacitance is removed, adjust self total resistance value, to guarantee the all-in resistance of equipment driving of master control system under control
Constant with the product of total load capacitance R × C, it is achieved the normal Inverter fed motor test of remaining tested frequency conversion motor electromagnetic wire；
High-voltage probe, is connected with high-voltage square-wave outfan and the oscillograph of push-pull type switching logic control circuit simultaneously, and ground connection,
For obtaining the high-voltage square wave signal of tested frequency conversion motor electromagnetic wire, and decayed to export to oscillograph after 1000 times and carried out
Waveform shows.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 1, its feature
Being, described master control system includes MCU, the human-computer interaction terminal being connected with this MCU, uses serial ports RS232 agreement to enter with this MCU
Row communication the FPGA of exportable TTL signal, and be connected with this FPGA and push-pull type switching logic control circuit, use simultaneously
In TTL signal being exported after digital-to-analogue conversion the D/A module to push-pull type switching logic control circuit；Described overcurrent protection senses
Circuit and push-pull type switching logic control circuit are connected with FPGA simultaneously.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 2, its feature
Being, described overcurrent protection sensing circuit includes Hall element that is identical with testing jig quantity and that connect one to one, and
Overcurrent protector that is identical with Hall element quantity and that connect one to one；With all of Hall element while of described FPGA
Connect with overcurrent protector；Described push-pull type switching logic control circuit and high-voltage probe all simultaneously with all of overcurrent protector
Connect.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 3, its feature
Being, described push-pull type switching logic control circuit includes the first high direct voltage output precision for producing positive high voltage, is used for
Produce the second high direct voltage output precision of negative dc high voltage, quantity be overcurrent protector twice and low-voltage coil with FPGA even
The high-voltage relay connect, on and the high-voltage contact of the high-voltage relay one end that connects one to one identical with high-voltage relay quantity
Noninductive resistance, and be connected with D/A module and use the semiconductor solid-state of half bridgepush pull structure to switch；Described first direct current is high
Pressure output precision is connected with the high-voltage contact of the high-voltage relay other end of half quantity simultaneously, and via corresponding noninductive resistance
Access semiconductor solid-state and switch one of them input；Described second high direct voltage output precision and second half high-voltage relay
The high-voltage contact of the device other end connects, and accesses another input of semiconductor solid-state switch via corresponding noninductive resistance；
The outfan of described semiconductor solid-state switch is connected with all of overcurrent protector simultaneously.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 4, its feature
Being, described first high direct voltage output precision includes the adjustable positive pole high-voltage DC power supply being connected with high-voltage relay, and
It is connected with this adjustable positive pole high-voltage DC power supply and the first storage capacitor of ground connection.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 5, its feature
Being, described second high direct voltage output precision includes the adjustable negative extra-high voltage DC source being connected with high-voltage relay, and
It is connected with this adjustable negative extra-high voltage DC source and the second storage capacitor of ground connection.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 6, its feature
Being, the model of described adjustable positive pole high-voltage DC power supply and adjustable negative extra-high voltage DC source is HAPS06-10K.
A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor the most according to claim 2, its feature
Being, the model of described MCU and FPGA is respectively STC12C5A60S2 and EP4CE10F17C8.
9. realize setting of multichannel frequency conversion motor electromagnetic wire Inverter fed motor test according to a kind of described in any one of claim 4～8
Standby, it is characterised in that described semiconductor solid-state switch is the semiconductor solid-state switch of push-pull type structure.
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| CN201610697968.3A CN106226663B (en) | 2016-08-22 | 2016-08-22 | A kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test |
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| CN106226663B (en) | 2019-08-02 |
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