CN106226663B - A kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test - Google Patents
A kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test Download PDFInfo
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- CN106226663B CN106226663B CN201610697968.3A CN201610697968A CN106226663B CN 106226663 B CN106226663 B CN 106226663B CN 201610697968 A CN201610697968 A CN 201610697968A CN 106226663 B CN106226663 B CN 106226663B
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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
-
- 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
Abstract
The invention discloses a kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test, solve the problems, such as output waveform is nonstandard in the prior art, parallel multiplex sample aging when waveform rising and falling time puncture with sample and change.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.The design of the invention is scientific and reasonable, operation is convenient, have the characteristics that waveform rising and falling time punctures one by one with sample without changing when output waveform meets IEC60034-18-41 and IEC 60034-18-42 standard, simultaneously test multichannel sample aging in parallel, has substantive distinguishing features outstanding and significant progress.
Description
Technical field
The present invention relates to a kind of test equipments, and in particular to a kind of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test
Equipment.
Background technique
The fast development of frequency conversion drive based on pulsewidth modulation (PWM) technology has pushed variable-frequency motor in the extensive of every profession and trade
Using variable frequency drive motors play an increasingly important role in national economy.However, variable-frequency motor insulation by high frequency,
Fast-changing repetition pulse effect, influence of the electric stress to insulation life is more sinusoidal, and power frequency electric stress is harsher, big quantitative change
The phenomenon that there is being not up to projected life with regard to premature deterioration in frequency motor.Using high-voltage square-wave is repeated, test variable-frequency motor insulate the longevity
Variable-frequency motor insulation system is ordered and improved, is had important practical significance to variable-frequency motor operation stability is improved.
Frequency converter exports the pulse voltage of ns grades of variations, encounters wave impedance mismatch after connecting motor, it may occur that wave refraction
And reflection.Steep rising edge generates spike reflected voltage in variable-frequency motor end and is superimposed upon in high-voltage square-wave pulse, continuous side
Wave impulse has very strong impact to stator winding insulation, and the shelf depreciation generated under pulse voltage corrodes the part of insulation system
Region accelerates variable-frequency motor failure of insulation process.
It is high to carry out the repetition that Inverter fed motor test of the insulation system under high-frequency impulse needs that there is hf and hv pulse to export
Press square wave system.In IEC60034-18-41 and IEC60034-18-42 standard, it is desirable that in research rotating electric machine insulating materials electricity
When senile experiment and test analysis shelf depreciation, Inverter fed motor is carried out to variable-frequency motor insulation system using high-voltage square-wave voltage is repeated
With partial discharge inception voltage test, while to repeat high-voltage square-wave voltage waveform parameter (peak-to-peak value, duty ratio, frequency, on
Rise time, waveform symmetry) it is described.GB/T21707-2008 frequency control special three-phase asynchronous motor isolation specifications,
The impulse waveform of material Inverter fed motor test is described and is suggested.
Existing pulse square wave-generator exists to meet simultaneously standard and require (is unsatisfactory for wave if meeting rising edge
Shape is symmetrical, meet waveform symmetry then voltage zero-cross there are dead zone, meeting voltage, to rise continuous then load capacity small etc.), thus
Different pulse square wave-generators carry out the tests such as voltage ageing experiment, shelf depreciation test, Inverter fed motor life-span test to same material
When, test data often has very big dispersibility, and test compares insufficient result and do not have convincingness.
In order to improve the efficiency in Inverter fed motor test and voltage ageing process, it is common practice that the output all the way of generation is external
Multiple test models.Since the high-voltage square-wave rise time of control is to determine that style exists by the time constant of capacitor and resistance
The probability of breakdown is minimum simultaneously in ageing process, and after style punctures all the way for certain, load total capacitance numerical value will change, if not
The resistance in control access circuit, rise time will change, that is, reduce.Remaining style will be when the waveform after change rises
Between it is lower continue aging, be no longer considered waveform rise time since the rise time is reduced, therefore obtained aging life-span will
The truth of style will not accurately be reacted.Guarantee the rise time for applying square wave when the aging simultaneously of multichannel style under
The drop time punctures with sample one by one without changing, and becomes skilled artisan's urgent problem to be solved.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test
Equipment, which meets IEC60034-18-41 and IEC60034-18-42 standard with output waveform while test in parallel is more
The characteristics of waveform rising and falling time punctures without changing one by one with sample when road test sample aging.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test, which is characterized in that including master control system,
Push-pull type switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit, testing jig and insulating box, in which:
Testing jig, for the fixed tested variable-frequency motor electromagnetic wire for being equivalent to equipment total load capacitance, quantity is two
It is attached above and by the way of in parallel；Meanwhile each testing jig all has the ground test of Hi-pot test electrode and ground connection
Electrode；
Insulating box, for controlling Inverter fed motor test environment temperature, all testing jigs are arranged in insulating box；
Overcurrent protection sensing circuit, at the same with master control system, push-pull type switching logic control circuit and all testing jigs
The connection of Hi-pot test electrode, for detecting the breakdown state of style during the test, and feeds back to master control system for test result
System；
Push-pull type switching logic control circuit, connect with master control system, for exporting high pressure to overcurrent protection sensing circuit
Square wave, and the test result fed back according to overcurrent protection sensing circuit, when some is tested variable-frequency motor electromagnetic wire by voltage breakdown
And after respective load capacitor is removed, itself total resistance value is adjusted, under the drive control of master control system to ensure equipment
Product R × C of all-in resistance and total load capacitance is constant, realizes the normal Inverter fed motor test of remaining tested variable-frequency motor electromagnetic wire；
High-voltage probe, while being connect with overcurrent protection sensing circuit and oscillograph, and be grounded, for obtaining tested variable-frequency electric
The high-voltage square wave signal of solenoid, and the output after 1000 times that decayed carries out waveform into oscillograph and shows.
Specifically, the master control system includes MCU, the human-computer interaction terminal being connect with the MCU, using serial ports RS232
Agreement is communicated with the MCU and the FPGA of exportable TTL signal, and simultaneously with the FPGA and push-pull type switching logic control
Circuit connection processed, for being exported TTL signal after digital-to-analogue conversion to the D/A module of push-pull type switching logic control circuit；It is described
Overcurrent protection sensing circuit and push-pull type switching logic control circuit are connect with FPGA simultaneously.
Specifically, the overcurrent protection sensing circuit includes identical as testing jig quantity and connects one to one suddenly
That sensor, and overcurrent protector that is identical as Hall sensor quantity and connecting one to one；The FPGA simultaneously with institute
Some Hall sensors are connected with overcurrent protector；The push-pull type switching logic control circuit and high-voltage probe simultaneously with institute
Some overcurrent protector connections.
Specifically, the push-pull type switching logic control circuit includes defeated for generating the first high direct voltage of positive high voltage
Component out, for generating the second high direct voltage output precision of negative dc high voltage, quantity is overcurrent protector twice and low-voltage line
Enclose the high-voltage relay that connect with FPGA, it is identical as high-voltage relay quantity and connect one to one to high-voltage relay one end
Noninductive resistance on high-voltage contact, and connect with D/A module and the semiconductor solid-state of half bridgepush pull structure is used to switch；It is described
First high direct voltage output precision is connect 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 input terminal；The second high direct voltage output precision and the other half
The high-voltage relay other end high-voltage contact connection, and via corresponding noninductive resistance access semiconductor solid-state switch it is another
A input terminal；The output end of the semiconductor solid-state switch is connect with all overcurrent protectors simultaneously.
More specifically, the first high direct voltage output precision includes the adjustable positive extra-high voltage connecting with high-voltage relay
DC power supply, and the first storage capacitor with the adjustable positive high-voltage DC power supply connect and ground.
More specifically, the second high direct voltage output precision includes the adjustable negative extra-high voltage connecting with high-voltage relay
DC power supply, and the second storage capacitor with the adjustable negative extra-high voltage DC power supply connect and ground.
Preferably, the model of the adjustable positive high-voltage DC power supply and adjustable negative extra-high voltage DC power supply is
HAPS06-10K。
Preferably, the model of the MCU and FPGA is respectively STC12C5A60S2 and EP4CE10F17C8.
Preferably, the semiconductor solid-state that the semiconductor solid-state switch is push-pull type structure switchs.
Design principle of the invention is, by the way that high-voltage relay and nothing are arranged in push-pull type switching logic control circuit
Equipment all-in resistance is adjusted in 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
Hinder with product R × C of total load capacitance and determine " this characteristic, push-pull type switching logic control circuit adjust automatically itself is always
Resistance value, it is ensured that the all-in resistance of equipment and product R × C of total load capacitance are constant, thus reach test circuit in voltage
Waveform rising and falling time puncture and immovable purpose one by one with sample.
Compared with prior art, the invention has the following advantages:
(1) present invention is by being arranged in parallel multiple testing jigs, and by reasonable circuit structure design, thus not only can be with
Multiple samples are tested simultaneously, substantially save time and the cost of labor of test, and can be avoided in single channel sample testing mistake
Test data is easy to appear the big phenomenon of dispersibility in journey.
(2) half-bridge circuit that the present invention is switched using semiconductor solid-state, high-voltage square-wave are exported from the upper and lower bridge arm center of half-bridge
Square wave, square wave is symmetrical, and no-voltage zero passage dead zone, so carries out the test of variable-frequency motor electromagnetic wire Inverter fed motor life-span using the present invention
It will be more acurrate.
(3) present invention is by 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 is damaged with preventing in the present invention each device breakdown with tested sample.
(4) present invention is arranged one by being arranged on the testing jig circuit of the road high-voltage probe Bing Mei at the two poles of the earth of all testing jigs
A Hall sensor, and setting high-voltage probe is connect with oscillograph in test circuit, all Hall sensors are connect with FPGA,
In this way, start test in tested sample until testing and hitting to per tested sample all the way during breakdown one by one
Voltage and current information when wearing in circuit carries out continual acquisition, so that each road tested sample square-wave voltage peak-to-peak value,
Square-wave voltage duty ratio, square-wave voltage frequency can be observed intuitively in oscillograph very much；And when the road circuit Zhong Mou is tested
When sample is breakdown, FPGA can accurately have found and handle the electric current that Hall sensor corresponding with the road tested sample is transmitted
Information, and control push-pull type switching logic control circuit and overcurrent protector corresponding with breakdown testing jig are made in time
Corresponding adjustment.
(5) present invention setting FPGA is programmed TTL signal, and transmits TTL signal by D/A module, to realize half-and-half
The control of conductor solid-state switch, the frequency and duty in high-voltage square-wave waveform parameter that semiconductor solid-state switch can be so exported
Than being effectively controlled；It, can in time efficiently by directly controlling high-voltage relay and overcurrent protector FPGA
The breakdown test electrode group circuit of overcurrent protector cutting corresponding thereto is controlled, and controls high-voltage relay in tested sample
To the adjusting of test circuitous resistance when being punctured one by one；Positive and negative anodes high-voltage DC power supply voltage is adjusted by FPGA to adjust pulse
Square-wave voltage peak-to-peak value, so that the high-voltage square-wave waveform for enabling the present invention to be loaded into tested sample both ends during the test is expired
To all standards of test waveform in sufficient IEC60034-18-41, IEC60034-18-42 and GB/T21707-2008.
(6) since semiconductor solid-state switch is during being switched fast, when to capacitive load quick charge and discharge
It can be generated in switching moment and be up to tens of Ampere currents, and the output waveform rise time is shorter, switching electric current is got in short-term
Greatly, therefore, the present invention is by being respectively arranged a storage capacitor in adjustable positive and negative anodes high-voltage DC power supply, wherein adjustable positive and negative anodes
High-voltage DC power supply carries out low current charge to storage capacitor, and storage capacitor can then carry out quick charge to load high current,
The idle problem of circuit is caused because the electric current of high-voltage DC power supply output is limited in this way, just can effectively avoid.
(7) present invention in operation, can directly by every test parameter of setting by human-computer interaction terminal to
MCU assigns instruction, keeps operation of the invention simpler convenient, improves the efficiency of test.
(8) present invention is additionally provided with insulating box, and all testing jigs are arranged in the insulating box, it can be achieved that test environment
The adjusting of temperature, to further increase the accuracy that the present invention tests.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention.
Fig. 2 is the square wave schematic diagram shown on oscillograph of the present invention.
Fig. 3 is semiconductor solid-state switch and its output square wave schematic diagram in the present invention.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
Embodiment
As shown in Figures 1 to 3, setting the present invention is to provide a kind of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test
It is standby, including master control system, push-pull type switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit and test
Frame.
The master control system is as logic control core of the invention, for controlling each equipment and circuit work, with
Realize the Inverter fed motor test of multichannel variable-frequency motor electromagnetic wire.The master control system includes MCU, and the human-computer interaction connecting with the MCU is whole
End, is communicated using serial ports RS232 agreement with the MCU and the FPGA of exportable TTL signal, and simultaneously with the FPGA and
The connection of push-pull type switching logic control circuit is controlled for exporting TTL signal after digital-to-analogue conversion to push-pull type switching logic
The D/A module of circuit.
The testing jig is for fixed tested variable-frequency motor electromagnetic wire (total load capacitance for being equivalent to equipment), quantity
It is five, and all testing jigs are in parallel, meanwhile, each testing jig all has the ground test electrode of Hi-pot test electrode and ground connection.
The overcurrent protection sensing circuit is used for tested variable-frequency motor electromagnetic wire on-load voltage, to carry out resistance to electricity to it
Dizzy test, and test result is fed back into master control system.Specifically, the overcurrent protection sensing circuit in the present embodiment includes five
A Hall sensor to connect one to one with testing jig and five connect one to one and low by one with Hall sensor
The overcurrent protector of voltage source power supply；The FPGA is connect with all Hall sensor and overcurrent protector simultaneously；The height
Pressure probe is connect with all overcurrent protectors simultaneously.
The push-pull type switching logic control circuit is used to export high-voltage square-wave to overcurrent protection sensing circuit, and according to mistake
The test result of stream protection sensing circuit feedback, when some is tested variable-frequency motor electromagnetic wire by voltage breakdown and respective load capacitor
After being removed, itself total resistance value is adjusted, under the drive control of master control system to ensure the all-in resistance and total load of equipment
The product (i.e. R × 5C) of capacitor is constant, realizes the normal Inverter fed motor test of remaining tested variable-frequency motor electromagnetic wire.Specifically,
The push-pull type switching logic control circuit includes the first high direct voltage output precision for generating positive high voltage, negative for generating
Second high direct voltage output precision of high direct voltage, quantity is ten and low-voltage coil is connect and equally by low tension with FPGA
Source is the high-voltage relay of low-voltage coil power supply, and ten correspond with high-voltage relay and are connected to high-voltage relay one end
High-voltage contact on noninductive resistance, and connect with D/A module and the semiconductor solid-state of half bridgepush pull structure used to switch.
Further say, the first DC voltage and current output precision include simultaneously with five high-voltage relay other ends
High-voltage contact connection adjustable positive high-voltage DC power supply, and with the adjustable positive high-voltage DC power supply connect and ground
First storage capacitor.Adjustable anode high-voltage DC power supply is via corresponding noninductive resistance access semiconductor solid-state switch therein one
A input terminal.And the second high direct voltage output precision then includes respective another with other five high-voltage relays simultaneously
End high-voltage contact connection adjustable negative extra-high voltage DC power supply, and with the adjustable negative extra-high voltage DC power supply connect and ground
The second storage capacitor.Adjustable negative extra-high voltage DC power supply is another via corresponding noninductive resistance access semiconductor solid-state switch
A input terminal.
The high-voltage probe is connect with oscillograph, and is grounded, and is used to obtain the high pressure of tested variable-frequency motor electromagnetic wire
Square-wave signal, and the output after 1000 times that decayed carries out waveform into oscillograph and shows that as shown in Figures 2 and 3, the present invention is surveying
The default high-voltage square-wave wave exported of high-voltage square-wave waveform and semiconductor solid-state switch that oscillograph is received and shown during examination
Shape is consistent, has reached the standard in IEC60034-18-41 and IEC60034-18-42 to test waveform.
In addition, the present invention is also provided with an insulating box, all testing jigs are both placed in the insulating box, and insulating box can
The adjusting of test environment temperature is realized, to further increase the accuracy of equipment test.
The parameter situation of part of devices is as follows in the present embodiment:
(1) parameter of positive high-voltage DC power supply (PHVDC) are as follows:
Output parameter: highest exports DC voltage 10kV, maximum output current 60mA；Degree of regulation: voltage 1V, electric current
0.1mA, constant pressure and flow are continuously adjustable；Interprogram communication agreement: RS232 and RS485；Concrete model: Hangzhou enlightening sends power supply HAPS06-
10K high-voltage DC power supply.
(2) parameter of cathode high-voltage DC power supply NHVPC are as follows:
Output parameter: highest exports DC voltage 10kV, maximum output current 60mA；Degree of regulation: voltage 1V, electric current
0.1mA.Constant pressure and flow is continuously adjustable；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 are as follows:
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 are as follows:
High-voltage contact parameter: maximum pressure resistance 10kV, maximum switching voltage DC 7.5kV, maximum switching electric current 2A；Low-voltage line
Enclose parameter: rated operational voltage DC12V, rated current 60mA；Setup Type: PCB straight cutting installation；Concrete model: LRL-102-
100PCV。
(5) parameter of noninductive resistance are as follows:
Electric parameter: maximum power 5W, single proof voltage DC500V；Medium material: cement, Wound-rotor type, no inductance value；Peace
Fill type: the vertical installation of PCB straight cutting.
(6) parameter of semiconductor solid-state switch are as follows:
Electric parameter: maximum working voltage 8kV, peak inrush current 60A are internally integrated low-voltage driving；Trigger signal:
TTL signal；Construction of switch: half bridgepush pull structure.
(7) parameter of insulating box are as follows:
Adjustable temperature range: 0~300 DEG C.
(8) parameter of high-voltage probe are as follows:
Attenuation ratio: 1000:1, concrete model: Tektronix P6015.
(9) parameter of D/A module are as follows:
Binary channels, 12bit, parallel, 100Msps sample rate.
(10) parameter of FPGA are as follows:
Model EP4CE10F17C8 has RS232 peripheral interface.
(11) parameter of human-computer interaction terminal are as follows:
Industrial control touch screen, terminal models are that prestige synthetic fibre leads to MT8101iE.
(12) parameter of MCU are as follows:
Model STC12C5A60S2 has serial ports RS232 agreement, has MODBUS agreement and Industry Control screen or computer expert
Letter.
A brief description is done with regard to the implementing procedure of the present embodiment below:
1. booting initializes hardware parameter；
Initialize content: setting 5 channel contract fullies, set voltage be 0, set high-voltage square-wave export is in off state,
The original frequency of high-voltage square-wave is set as 50Hz, duty ratio 50%；
2. configuration uses channel
Selection needs to export the channel of high-voltage square-wave on the touchscreen, opens it；The data that MCU is inputted according to touch screen
The high-voltage relay of corresponding output channel is opened, while needing the resistance value accessed to pass through high-voltage relay according to input information selection
Device switching；
3. setting high-voltage square-wave parameter
Setting output square wave peak-to-peak value, frequency, duty ratio on the touchscreen；Shape information is transferred to by MCU by RS232
FPGA carries out exporting corresponding TTL signal；
4. setting high-voltage square-wave output state
Setting high-voltage square-wave output state is in an open state on the touchscreen, and MCU controls high-voltage relay and connects semiconductor
The low-voltage control power of solid-state switch, high-voltage square-wave power supply bring into operation.
5. timing starts
After high-voltage square-wave output state is in an open state, the channel of setting output high-voltage square-wave starts to carry out on touch screen
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
Road high-voltage relay shutdown will be controlled after fixed signal, and the sample of breakdown is removed from circuit.The 6th and step 7 are repeated, directly
Breakdown to all samples, timing stops, and closes power supply output.
When multichannel tested sample is tested simultaneously, a certain tested sample increases the present invention in breakdown immediate current, and this
The current foldback circuit of invention setting can sensitively react the state, generate the voltage signal of a mutation；In the present invention, by
In the over-current signal that tested sample is hit it is that moment is non-continuous, therefore keep and reset after the signal triggering of this circuit design
Function, and for guarantee controller when digital processing with analog signal realize electrical isolation, devise optocoupler signal every
From the signal relay of use selects the enable signal of output channel, uses special purpose driver ULN2003 and realizes
To the drive control of high-voltage relay.
The present invention is to realize to the program-controlled of high-voltage DC power supply, passes through RS232 agreement using FPGA while controlling positive and negative
High direct voltage DC power output voltage reaches frequency, the duty ratio in the high-voltage square-wave waveform parameter of output to realize
The requirement of IEC60034-18-41 and IEC60034-18-42 standard is programmed TTL signal using FPGA, and external one
DA digital analog converter exports TTL trigger signal；The present invention is to provide the interface of personal-machine interaction, is realized using MCU
MODBUS agreement and Industry Control screen or compunlcation, while MCU is communicated using serial ports RS232 agreement with FPGA；And it is
The needs for meeting equipment test, are powered low-pressure section using 220V Switching Power Supply, supply voltage DC5V, DC12V,
DC24V。
Present invention employs control technologies and equipment that existing application is mature, and by scientific and reasonable mode by these skills
Art and equipment are combined, thus test while realizing multichannel variable-frequency motor electromagnetic wire Inverter fed motor well, and testing
When its output waveform meet the standard of IEC60034-18-41 and IEC60034-18-42, and test multichannel examination in parallel at the same time
Waveform rising and falling time punctures with sample one by one without changing when sample aging, has filled up the sky of the technical field in this respect
It is white.Not only measuring accuracy is high, output waveform meets international standard by the present invention, multichannel tested sample exists in breakdown rear load one by one
The waveform rising and falling time of remaining tested sample does not change, and operation is convenient, therefore, compared with prior art, tool
Standby substantive distinguishing features outstanding and marked improvement.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
Enclose, it is all in body design thought of the invention and mentally make have no the change of essential meaning or polishing, solved
Technical problem is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (4)
1. a kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test, which is characterized in that including master control system, push away
Pull switching logic control circuit, oscillograph, high-voltage probe, overcurrent protection sensing circuit, testing jig and insulating box, in which:
Testing jig, for the fixed tested variable-frequency motor electromagnetic wire for being equivalent to equipment total load capacitance, quantity is two or more
And it is attached by the way of in parallel；Meanwhile each testing jig all has the ground test electrode of Hi-pot test electrode and ground connection；
Insulating box, for controlling Inverter fed motor test environment temperature, all testing jigs are arranged in insulating box；
Overcurrent protection sensing circuit, while the high pressure with master control system, push-pull type switching logic control circuit and all testing jigs
Electrode connection is tested, for detecting the breakdown state of style during the test, and test result is fed back into master control system；
Push-pull type switching logic control circuit, connect with master control system, for exporting high-voltage square-wave to overcurrent protection sensing circuit,
And the testing result fed back according to overcurrent protection sensing circuit, when some is tested variable-frequency motor electromagnetic wire by voltage breakdown and corresponding
After load capacitance is removed, itself total resistance value is adjusted, under the drive control of master control system to ensure the all-in resistance of equipment
It is constant with product R × C of total load capacitance, realize the normal Inverter fed motor test of remaining tested variable-frequency motor electromagnetic wire；
High-voltage probe, while being connect with the high-voltage square-wave output end of push-pull type switching logic control circuit and oscillograph, and be grounded,
For obtaining the high-voltage square wave signal of tested variable-frequency motor electromagnetic wire, and is decayed to export after 1000 times and be carried out into oscillograph
Waveform is shown；
The master control system includes MCU, the human-computer interaction terminal connecting with the MCU, using serial ports RS232 agreement and the MCU into
The FPGA of row communication and exportable TTL signal, and connect, use with the FPGA and push-pull type switching logic control circuit simultaneously
In being exported TTL signal after digital-to-analogue conversion to the D/A module of push-pull type switching logic control circuit；The overcurrent protection sensing
Circuit and push-pull type switching logic control circuit are connect with FPGA simultaneously；
The overcurrent protection sensing circuit includes Hall sensor that is identical as testing jig quantity and connecting one to one, and
Overcurrent protector that is identical as Hall sensor quantity and connecting one to one；The FPGA simultaneously with all Hall sensors
It is connected with overcurrent protector；The push-pull type switching logic control circuit and high-voltage probe simultaneously with all overcurrent protectors
Connection；
The push-pull type switching logic control circuit includes the first high direct voltage output precision for generating positive high voltage, for producing
Second high direct voltage output precision of raw negative dc high voltage, quantity is overcurrent protector twice and low-voltage coil is connect with FPGA
High-voltage relay, it is identical as high-voltage relay quantity and connect one to one onto the high-voltage contact of high-voltage relay one end
Noninductive resistance, and connect with D/A module and the semiconductor solid-state of half bridgepush pull structure is used to switch；First high direct voltage
Output precision is connect with the high-voltage contact of the high-voltage relay other end of half quantity simultaneously, and is connect via corresponding noninductive resistance
Enter semiconductor solid-state and switchs one of input terminal；The high-voltage relay of the second high direct voltage output precision and the other half
The high-voltage contact of the other end connects, and via another input terminal of corresponding noninductive resistance access semiconductor solid-state switch；Institute
It states the output end of semiconductor solid-state switch while being connect with all overcurrent protectors；
The first high direct voltage output precision includes the adjustable positive high-voltage DC power supply connecting with high-voltage relay, Yi Jiyu
First storage capacitor of positive high-voltage DC power supply connect and ground that this is adjustable, the second high direct voltage output precision include with
High-voltage relay connection adjustable negative extra-high voltage DC power supply, and with the adjustable negative extra-high voltage DC power supply connect and ground
Second storage capacitor.
2. a kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test according to claim 1, feature
It is, the model of the adjustable positive high-voltage DC power supply and adjustable negative extra-high voltage DC power supply is HAPS06-10K.
3. a kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test according to claim 2, feature
It is, the model of the MCU and FPGA are respectively STC12C5A60S2 and EP4CE10F17C8.
4. what a kind of described in any item achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motors were tested according to claim 1~3 sets
It is standby, which is characterized in that the semiconductor solid-state switch is that the semiconductor solid-state of push-pull type structure switchs.
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| CN108287298A (en) * | 2018-01-17 | 2018-07-17 | 四川大学 | A kind of Multi-path synchronous test device of polyimides corona-resistance property |
| CN109194181A (en) * | 2018-11-01 | 2019-01-11 | 北京京航计算通讯研究所 | Automate high pressure two fingers number wave impulse source |
| CN109725240B (en) * | 2018-11-16 | 2021-10-12 | 中国兵器工业集团江山重工研究院有限公司 | General electric strength detection device |
| KR102576342B1 (en) * | 2018-11-23 | 2023-09-07 | 삼성전자주식회사 | Semiconductor device and method for operating semiconductor device |
| CN112285558A (en) * | 2020-10-23 | 2021-01-29 | 上海电气风电集团股份有限公司 | Insulation fault discharge test device and method for wind driven generator winding |
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