CN204439681U - For the repetition high-voltage square-wave generator of variable-frequency motor electromagnetic wire Inverter fed motor test - Google Patents
For the repetition high-voltage square-wave generator of variable-frequency motor electromagnetic wire Inverter fed motor test Download PDFInfo
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- CN204439681U CN204439681U CN201520167586.0U CN201520167586U CN204439681U CN 204439681 U CN204439681 U CN 204439681U CN 201520167586 U CN201520167586 U CN 201520167586U CN 204439681 U CN204439681 U CN 204439681U
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Abstract
The utility model discloses a kind of repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor, mainly there is output waveform in solution prior art nonstandard, the problem of all requirements of standard can not be met simultaneously.This utility model is adjustable positive high voltage direct supply, adjustable negative high-voltage DC power supply, TTL trigger pip circuit and semiconductor high-pressure solid-state switch, the output terminal of adjustable positive high voltage direct supply is connected with the positive input terminal of semiconductor high-pressure solid-state switch, the output terminal of adjustable negative high-voltage DC power supply is connected with the negative input end of semiconductor high-pressure solid-state switch, and the signal output part of TTL trigger pip circuit is connected with semiconductor high-pressure solid-state switch driving signal input.By such scheme, the utility model adopts semiconductor high-pressure solid-state switch to form half-bridge circuit, and high-voltage square-wave exports square wave from the upper and lower brachium pontis center of half-bridge, reaches output waveform standard and can meet the object of all requirements.
Description
Technical field
The utility model relates to a kind of high-voltage square-wave generator, specifically, relates to a kind of repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor.
Background technology
Fast development based on the frequency conversion drive of width modulation (PWM) technology has promoted the widespread use of variable-frequency motor in every profession and trade, and variable frequency drive motors plays more and more important role in national economy.But variable-frequency motor insulation is by high frequency, fast-changing repetition pulse effect, and the impact of electric stress on insulation life more sinusoidal power frequency electric stress is harsher, a large amount of variable-frequency motor occurs not reaching the phenomenon of designed life with regard to premature deterioration.Utilize and repeat high-voltage square-wave, test variable-frequency motor insulation life also improves variable-frequency motor insulation system, has important practical significance to raising variable-frequency motor operation stability.
Frequency converter exports the pulse voltage of ns level change, runs into wave impedance and does not mate, wave refraction and reflection can occur after connecting motor.Steep rising edge produces spike reflected voltage in variable-frequency motor end and is superimposed upon in high-voltage square-wave pulse, continuous print square-wave pulse has very strong impact to stator winding insulation, the shelf depreciation produced under pulse voltage corrodes the subregion of insulation system, accelerates variable-frequency motor failure of insulation process.
Carry out the repetition high-voltage square-wave system that the Inverter fed motor test of insulation system under high-frequency impulse needs to have hf and hv pulse output.In IEC60034-18-41 and IEC 60034-18-42 standard, require when studying the experiment of electric rotating machine insulating material voltage ageing and test analysis shelf depreciation, use repetition high-voltage square-wave voltage to carry out Inverter fed motor and partial discharge inception voltage's test to variable-frequency motor insulation system, the waveform parameter (peak-to-peak value, dutycycle, frequency, rise time, waveform symmetry) repeating high-voltage square-wave voltage is described simultaneously.GB/T21707-2008 frequency control special three-phase asynchronous motor isolation specifications, is also described the pulse waveform of material Inverter fed motor test and advises.
Existing pulse square wave-generator exists can not meet all requirements of standard (then do not meet waveform symmetry as met rising edge, then voltage zero-cross exists dead band, then load capacity is little etc. continuously to meet voltage rise to meet waveform symmetry) simultaneously, thus different pulse square wave-generator is when carrying out the test such as voltage ageing experiment, shelf depreciation test, Inverter fed motor life test to same material, its test data often has very large dispersiveness, and the insufficient result of test comparison does not have cogency.
Utility model content
The purpose of this utility model is to provide a kind of repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor, mainly there is output waveform in solution prior art nonstandard, can not meet the problem of all requirements of standard simultaneously.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor comprises adjustable positive high voltage direct supply, adjustable negative high-voltage DC power supply, 220V AC power, accessory power supply, first charging resistor, second charging resistor, TTL trigger pip circuit and semiconductor high-pressure solid-state switch, the output terminal of 220V AC power respectively with the input end of adjustable positive high voltage direct supply, the input end of adjustable negative high-voltage DC power supply is connected with the input end of accessory power supply, the two ends of the first charging resistor are connected with the output terminal of adjustable positive high voltage direct supply and the positive input terminal of semiconductor high-pressure solid-state switch respectively, the two ends of the second charging resistor are connected with the output terminal of adjustable negative high-voltage DC power supply and the negative input end of semiconductor high-pressure solid-state switch respectively, the output terminal of accessory power supply is connected with the power end of semiconductor high-pressure solid-state switch and the power end of TTL trigger pip circuit respectively, the signal output part of TTL trigger pip circuit is connected with semiconductor high-pressure solid-state switch driving signal input.
Further, be all connected with current foldback circuit between adjustable positive high voltage direct supply and the first charging resistor and between power supply adjustable negative high-voltage DC power supply and the second charging resistor, the power end of current foldback circuit is connected with accessory power supply.
Circuit topology of the present utility model is half-bridge circuit, and with semiconductor high-pressure solid-state switch for core, high-voltage square-wave exports from the upper and lower brachium pontis center of half-bridge.
Particularly, charging resistor is made up of multiple noninductive resistance connected successively, and all noninductive resistances are arranged as " bow " type, reduces the inductive interferences of charge circuit; The spread geometry of all noninductive resistances also can be other makes the utility model have the connection shape of compact conformation, the little feature of volume.
Particularly, adjustable positive high voltage direct supply the highest output+8kV direct current, capacity 1kVA; Adjustable negative high-voltage DC power supply the highest output-8kV direct current, capacity 1kVA.
Particularly, semiconductor high-pressure solid-state switch is metal oxide semiconductor field effect tube MOSFET.
Particularly, accessory power supply is the Switching Power Supply of low-noise high-efficiency; Accessory power supply also can be other Switching Power Supplies.
Compared with prior art, the utility model has following beneficial effect:
(1) half-bridge circuit that the utility model is is core parts with semiconductor high-pressure solid-state switch, high-voltage square-wave exports square wave from the upper and lower brachium pontis center of half-bridge, square wave is symmetrical, and no-voltage zero passage dead band, adopting the utility model to test the variable-frequency motor electromagnetic wire Inverter fed motor life-span will be more accurate.
(2) the utility model carrys out regulating impulse square-wave voltage peak-to-peak value by regulating the voltage of positive high voltage direct current power source voltage and negative high voltage direct current power source voltage; The dutycycle of the pulse signal sent by regulating TTL trigger pip circuit carrys out regulating impulse square-wave voltage dutycycle; The frequency of the pulse signal sent by regulating TTL trigger pip circuit carrys out regulating impulse square-wave voltage frequency; According to load capacitance amount, change pulse square wave voltage rising time by changing charging resistor resistance size; Make the utility model can meet all standards to test waveform in IEC60034-18-41, IEC 60034-18-42 and GB/T21707-2008 according to above-mentioned adjustment, electromagnetic wire Inverter fed motor life-span and local discharge test can be directly used in, make test data more can reflect actual conditions, test result has cogency.
(3) when in the utility model, current foldback circuit is used for preventing electric-magnetic wire sample from puncturing, electric current is excessive causes damage to element each in the utility model.
(4) in the utility model, 220V AC power can not only be powered for the utility model, can also reduce the electromagnetic interference (EMI) such as the harmonic wave of civil power generation.
(5) in the utility model, charging resistor is made up of multiple noninductive resistance connected successively, and arrangement is installed as " bow " type, the inductive interferences of reduction charge circuit, makes the utility model have compact conformation, volume is little and realizability is strong feature.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of embodiment 1.
Fig. 2 is the structured flowchart of embodiment 2.
Fig. 3 is that semiconductor high-pressure solid-state switch half-bridge structure exports square wave schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment 1
As shown in figures 1 and 3, repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor comprises adjustable positive high voltage direct supply, adjustable negative high-voltage DC power supply, 220V AC power, accessory power supply, first charging resistor, second charging resistor, TTL trigger pip circuit and semiconductor high-pressure solid-state switch, the output terminal of 220V AC power respectively with the input end of adjustable positive high voltage direct supply, the input end of adjustable negative high-voltage DC power supply is connected with the input end of accessory power supply, the two ends of the first charging resistor are connected with the output terminal of adjustable positive high voltage direct supply and the positive high voltage input end of semiconductor high-pressure solid-state switch respectively, the two ends of the second charging resistor are connected with the output terminal of adjustable negative high-voltage DC power supply and the negative high voltage input end of semiconductor high-pressure solid-state switch respectively, the output terminal of accessory power supply is connected with the power end of semiconductor high-pressure solid-state switch and the power end of TTL trigger pip circuit respectively, the signal output part of TTL trigger pip circuit is connected with semiconductor high-pressure solid-state switch driving signal input.
The half-bridge circuit that said structure composition is core parts with semiconductor high-pressure solid-state switch, this circuit high-voltage square-wave exports from the upper and lower brachium pontis center of half-bridge, square wave is symmetrical, and no-voltage zero passage dead band, adopting the utility model to test the variable-frequency motor electromagnetic wire Inverter fed motor life-span will be more accurate.
Wherein, charging resistor is made up of multiple noninductive resistance connected successively, and all noninductive resistances are arranged as " bow " type; All noninductive resistances also can arrange and be installed as the shape that other can reduce capacitor and inductor distribution; Adjustable positive high voltage direct supply the highest output+8kV direct current, capacity 1kVA; Adjustable negative high-voltage DC power supply the highest output-8kV direct current, capacity 1kVA; Semiconductor high-pressure solid-state switch is metal oxide semiconductor field effect tube MOSFET; Accessory power supply is the Switching Power Supply of low-noise high-efficiency; Accessory power supply is used for providing power supply for TTL trigger pip circuit and semiconductor high-pressure solid-state switch; TTL trigger pip circuit is available circuit, is here not described in detail; 220V AC power can not only be powered for the utility model, can also reduce the electromagnetic interference (EMI) such as the harmonic wave of civil power generation.
When installing and using, TTL trigger pip circuit uses on-site programmable gate array FPGA to produce signal, and export after MOSFET driving chip TPS28225 power amplification, the resistance of noninductive resistance is 10W.
Embodiment 2
As shown in Figure 2; the difference of the present embodiment and embodiment 1 is; all be connected with current foldback circuit between adjustable positive high voltage direct current and the first charging resistor and between power supply adjustable negative high-voltage DC power supply and the second charging resistor, the power input of current foldback circuit is connected with accessory power supply.
Wherein, current foldback circuit is circuit common, is here not described in detail; When current foldback circuit is used for preventing electromagnetic wire from puncturing, electric current is excessive causes damage to element each in the utility model.
The pulse square wave voltage parameter that the utility model produces regulates:
The first, pulse square wave Voltage Peak peak value: regulate by regulating the voltage of positive high voltage direct current power source voltage and negative high voltage direct current power source voltage.
The second, pulse square wave voltage duty cycle: the dutycycle of the pulse signal regulating TTL trigger pip circuit to send.
3rd, pulse square wave electric voltage frequency: the frequency of the pulse signal regulating TTL trigger pip circuit to send.
4th, pulse square wave voltage rising time: according to load capacitance amount, changes the rise time by changing charging resistor resistance size.
According to above-described embodiment, just the utility model can be realized well.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical matters; even if some making on the utility model are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the utility model, therefore it also should in protection domain of the present utility model.
Claims (6)
1. the repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor, it is characterized in that: comprise adjustable positive high voltage direct supply, adjustable negative high-voltage DC power supply, 220V AC power, accessory power supply, first charging resistor, second charging resistor, TTL trigger pip circuit and semiconductor high-pressure solid-state switch, the output terminal of 220V AC power respectively with the input end of adjustable positive high voltage direct supply, the input end of adjustable negative high-voltage DC power supply is connected with the input end of accessory power supply, the two ends of the first charging resistor are connected with the output terminal of adjustable positive high voltage direct supply and the positive input terminal of semiconductor high-pressure solid-state switch respectively, the two ends of the second charging resistor are connected with the output terminal of adjustable negative high-voltage DC power supply and the negative input end of semiconductor high-pressure solid-state switch respectively, the output terminal of accessory power supply is connected with the power end of semiconductor high-pressure solid-state switch and the power end of TTL trigger pip circuit respectively, the signal output part of TTL trigger pip circuit is connected with semiconductor high-pressure solid-state switch driving signal input.
2. the repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor according to claim 1, is characterized in that: semiconductor high-pressure solid-state switch is metal oxide semiconductor field effect tube MOSFET.
3. the repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor according to claim 2; it is characterized in that: be all connected with current foldback circuit between adjustable positive high voltage direct supply and the first charging resistor and between power supply adjustable negative high-voltage DC power supply and the second charging resistor, the power end of current foldback circuit is connected with accessory power supply.
4. the repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor according to claim 3, it is characterized in that: charging resistor is made up of multiple noninductive resistance connected successively, and all noninductive resistances is arranged as " bow " type.
5. the repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor according to claim 4, is characterized in that: adjustable positive high voltage direct supply the highest output+8kV direct current, capacity 1kVA; Adjustable negative high-voltage DC power supply the highest output-8kV direct current, capacity 1kVA.
6. the repetition high-voltage square-wave generator for the test of variable-frequency motor electromagnetic wire Inverter fed motor according to claim 5, is characterized in that: accessory power supply is the Switching Power Supply of low-noise high-efficiency.
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| CN201520167586.0U CN204439681U (en) | 2015-03-24 | 2015-03-24 | For the repetition high-voltage square-wave generator of variable-frequency motor electromagnetic wire Inverter fed motor test |
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| CN201520167586.0U CN204439681U (en) | 2015-03-24 | 2015-03-24 | For the repetition high-voltage square-wave generator of variable-frequency motor electromagnetic wire Inverter fed motor test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226663A (en) * | 2016-08-22 | 2016-12-14 | 四川大学 | A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor |
| CN109342788A (en) * | 2018-11-19 | 2019-02-15 | 中国电力科学研究院有限公司 | A kind of square-wave voltage source |
| CN113030662A (en) * | 2021-03-08 | 2021-06-25 | 天津大学 | Multi-sensor polymer insulating material partial discharge erosion tolerance measuring device and method |
| ES2867673A1 (en) * | 2021-05-03 | 2021-10-20 | Power Innotech S L | ASYMMETRIC SQUARE WAVE DIRECT CURRENT TO ALTERNATING CURRENT CONVERTER (Machine-translation by Google Translate, not legally binding) |
-
2015
- 2015-03-24 CN CN201520167586.0U patent/CN204439681U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226663A (en) * | 2016-08-22 | 2016-12-14 | 四川大学 | A kind of equipment realizing the test of multichannel frequency conversion motor electromagnetic wire Inverter fed motor |
| CN106226663B (en) * | 2016-08-22 | 2019-08-02 | 四川大学 | A kind of equipment of achievable multichannel variable-frequency motor electromagnetic wire Inverter fed motor test |
| CN109342788A (en) * | 2018-11-19 | 2019-02-15 | 中国电力科学研究院有限公司 | A kind of square-wave voltage source |
| CN113030662A (en) * | 2021-03-08 | 2021-06-25 | 天津大学 | Multi-sensor polymer insulating material partial discharge erosion tolerance measuring device and method |
| CN113030662B (en) * | 2021-03-08 | 2022-09-13 | 天津大学 | Method for measuring local discharge erosion resistance of multi-sensor polymer insulating material |
| ES2867673A1 (en) * | 2021-05-03 | 2021-10-20 | Power Innotech S L | ASYMMETRIC SQUARE WAVE DIRECT CURRENT TO ALTERNATING CURRENT CONVERTER (Machine-translation by Google Translate, not legally binding) |
| WO2022234169A1 (en) * | 2021-05-03 | 2022-11-10 | Power Innotech S.L. | Direct current to asymmetrical square wave alternating current converter |
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