CN201886091U - Tester of frequency converter - Google Patents
Tester of frequency converter Download PDFInfo
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- CN201886091U CN201886091U CN201020159752XU CN201020159752U CN201886091U CN 201886091 U CN201886091 U CN 201886091U CN 201020159752X U CN201020159752X U CN 201020159752XU CN 201020159752 U CN201020159752 U CN 201020159752U CN 201886091 U CN201886091 U CN 201886091U
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- frequency converter
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Abstract
The utility model discloses a tester of a frequency converter, aiming at accurately locating the fault position. The tester of the frequency converter comprises a high-voltage power supply circuit, a low-voltage power supply circuit, a frequency generating circuit and a detection circuit, wherein the high-voltage power supply circuit, the low-voltage power supply circuit and the detection circuit are respectively connected with the detected frequency converter; and the detection circuit is also connected with a computer. The detection circuit is used for monitoring the logic level and transmitting the result to a computer for display, and the error of the circuit is analyzed and rapidly located, so that fault signals can be accurately detected even if existing for a few microseconds. The tester of the frequency converter is applicable to detecting and maintaining the common frequency converter.
Description
Technical field
The utility model relates to a kind of electrical equipment and detects maintenance of equipment, especially relates to a kind of frequency converter tester that can accurately find abort situation.
Background technology
Along with the continuous development of industry and the raising of human goods and materials requirement, production technology is more and more higher, and supporting electrical equipment speed governing requires also more and more higher.Motor is taken product as the leading factor in the electrical equipment transmission.Because the inductance characteristic of motor, the reactive power that is produced can be wasted electric energy in a large number, does not meet the requirement of environmental protection and energy saving.In view of above problem, frequency converter becomes the auxiliary products with motor, has promptly satisfied the reactive power loss problem that technology speed governing requirement has also solved motor.Frequency converter is as electronic product, and long-term the use all kinds of faults can occur later.The maintenance frequency converter becomes the problem with certain technical difficulty.
Frequency converter mainly is made of IGBT, driving circuit and mainboard, and it carries out rectifying and wave-filtering with alternating current becomes direct current and be adjusted to alternating current by inversion again, and visible inversion is its important part.Damage also main because inversion damages; the main drive plate part of damaging; Switching Power Supply; and current detecting protection part, in maintenance, need 540V (380V frequency conversion) according to general damage scope, 320V (220V frequency conversion) direct supply; and 5V; 12V, 15V, direct supplys such as 24V are used as test.Each frequency converter driving circuit is all formed by 6 the tunnel, and which has the warning of unusually all can causing and will stop in several microseconds, and general equipment can not detect.Ba Mage frequency conversion test for chemical fibre industry need have the unit operation device of isolating communication, and the frequency setter.
Patent Office of the People's Republic of China discloses Granted publication on February 14th, 2007 and number has been the patent documentation of CN2869839Y, name is called the frequency converter pick-up unit, it comprises power input, regulating circuit, electromagnetic adjustable speed motor and frequency converter input end, described power input connects the input end of regulating circuit, the field coil that connects electromagnetic adjustable speed motor through the variable DC voltage of regulating circuit output voltage values, the rotor core of described electromagnetic adjustable speed motor connects motor output shaft, with described motor output shaft shareholder, the three-phase input end of prime mover connects described frequency converter input end through A.C. contactor.The weak point of this scheme is that riches all the way in 6 road of frequency converter drives and gives birth to fault that mainboard can use accurately fault location position of general multimeter or oscillograph at a few microsecond internal cutting off power supplys.
Summary of the invention
The utility model mainly is to solve the existing in prior technology technical matters of fault location occurrence positions promptly and accurately, provide a kind of by detecting the logic level height, can be on computers accurate fault location position, be convenient to detect and keep in repair the detecting instrument of frequency converter.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: a kind of frequency converter tester, it is characterized in that, comprise high-voltage power supply circuit, low-voltage power supply circuit, frequency generating circuit, testing circuit, described high-voltage power supply circuit, described low-voltage power supply circuit, described testing circuit are connected with tested frequency converter respectively, and described testing circuit also connects computing machine.Power supply when high-voltage power supply circuit and low-voltage power supply circuit are used to detect frequency converter, testing circuit connects 6 road of frequency converter and drives, when breaking down, can accurately detect the variation of output logic level, and data are sent on the computing machine, show by the mode of computing machine with figure, as long as according to the mistake of shown content in just can analysis circuit, the position of failure judgement, thus further keep in repair.
As preferably, high-voltage power supply circuit comprises the TDGC2-0.5K pressure regulator.Adopt TDGC2-0.5K to boost and step-down, can obtain the DC voltage of 0-700V, satisfy the power supply needs of 200V and 380V frequency converter from the lotus root pressure regulator.Voltage is adjustable can to connect low voltage to frequency converter earlier, clearly finds fault by voltage table and reometer, and in time powered-down if directly connect high-tension electricity the secondary damage takes place easily, enlarges the maintenance area, increases loss.
As preferably, testing circuit comprises the PIC18F2550 chip.The PIC18F2550 chip cooperates peripheral circuit can accurately detect the variation of logic level, and passes to computing machine.And chip carries the USB excuse, supports the USB communications protocol, can be connected with computing machine easily.
As preferably, the high-voltage power supply circuit output terminal is provided with a relay switch.Relay switch can when high-voltage power supply circuit input end wrong, prevent to get an electric shock and flatiron weldering in the generation of situation of short circuit.
As preferably, the frequency generating circuit output terminal is in series with a milliampere reometer.Whether the optocoupler that can detect on the frequency converter by being used of frequency generating circuit and milliammeter is aging.
The beneficial effect that brings of the present utility model is, even the frequency converter mainboard is received a few microsecond internal cutting off power supplys after the alarm powering on, testing circuit also can detect unusual level to be changed, and pass to computing machine, the maintenance personal can be directly according to the mistake in the information parser circuit of seeing on the computing machine, the failure judgement occurrence positions, whether normal, can provide low voltage to prevent the generation that secondary damages if can detect optocoupler by frequency generating circuit.
Description of drawings
Fig. 1 is a kind of circuit block diagram of the present utility model; Fig. 2 is a kind of circuit theory diagrams of high-voltage power supply circuit of the present utility model; Fig. 3 is a kind of circuit theory diagrams of testing circuit of the present utility model; Among the figure: 1, high-voltage power supply circuit, 2, low-voltage power supply circuit, 3, frequency generating circuit, 4, testing circuit, 5, frequency converter, 6, computing machine.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the frequency converter tester of present embodiment, as shown in Figure 1, comprise high-voltage power supply circuit 1, low-voltage power supply circuit 2, frequency generating circuit 3 and testing circuit 4, high-voltage power supply circuit 1, low-voltage power supply circuit 2 and frequency generating circuit 3 all are connected with tested frequency converter 5 respectively.Testing circuit 4 connects 6 road of frequency converter 5 and drives output, and is connected with computing machine 6 by USB interface.High-voltage power supply circuit 1 as shown in Figure 2, having adopted TDGC2-0.5K to finish from the lotus root pressure regulator boosts and buck functionality, can export any adjustable DC voltage of 0-700V/0.5KW, output terminal is provided with a relay switch, can prevent from inverse time to get an electric shock and the generation of the situation of the short circuit flatiron weldering time when input end ground wire and live wire connect.Low-voltage power supply circuit 2 can be exported 5V, 12V, 24V and four kinds of different output voltages of adjustable 24V, is beneficial to discrete component is carried out live testing.Testing circuit 4 adopts the PIC18F2550 single-chip microcomputer as shown in Figure 3, can accurately capture the variation of the logic level of being monitored, and by the USB interface that carries, can directly be connected with computing machine, will detect to such an extent that signal is expressed intuitively with the mode of figure.Frequency generating circuit 3 can produce the frequency signal of 2.5KHz-10KHz, for the given use of simulation frequency conversion frequency, is in series with a milliampere reometer at output terminal simultaneously, and whether the optocoupler that can detect on the frequency converter 5 is aging.
Claims (5)
1. frequency converter tester, it is characterized in that, comprise high-voltage power supply circuit (1), low-voltage power supply circuit (2), frequency generating circuit (3), testing circuit (4), described high-voltage power supply circuit (1), described low-voltage power supply circuit (2), described testing circuit (4) are connected with tested frequency converter respectively, and described testing circuit (4) also connects computing machine (6).
2. frequency converter tester according to claim 1 is characterized in that, described high-voltage power supply circuit (1) comprises the TDGC2-0.5K pressure regulator.
3. frequency converter tester according to claim 1 is characterized in that, described testing circuit (4) comprises the PIC18F2550 chip.
4. frequency converter tester according to claim 1 and 2 is characterized in that, described high-voltage power supply circuit (1) output terminal is provided with a relay switch.
5. frequency converter tester according to claim 1 is characterized in that, described frequency generating circuit (3) output terminal is in series with a milliampere reometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020159752XU CN201886091U (en) | 2010-04-15 | 2010-04-15 | Tester of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020159752XU CN201886091U (en) | 2010-04-15 | 2010-04-15 | Tester of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886091U true CN201886091U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020159752XU Expired - Fee Related CN201886091U (en) | 2010-04-15 | 2010-04-15 | Tester of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886091U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020391A (en) * | 2014-06-13 | 2014-09-03 | 上海新时达电气股份有限公司 | Method for detecting input outage of frequency converter |
| CN106443280A (en) * | 2016-11-21 | 2017-02-22 | 中车兰州机车有限公司 | Traction frequency convertor testing device |
| CN115267411A (en) * | 2022-06-16 | 2022-11-01 | 石家庄开宇工控设备有限公司 | Frequency converter test system and frequency converter test method |
-
2010
- 2010-04-15 CN CN201020159752XU patent/CN201886091U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020391A (en) * | 2014-06-13 | 2014-09-03 | 上海新时达电气股份有限公司 | Method for detecting input outage of frequency converter |
| CN104020391B (en) * | 2014-06-13 | 2017-01-25 | 上海新时达电气股份有限公司 | Method for detecting input outage of frequency converter |
| CN106443280A (en) * | 2016-11-21 | 2017-02-22 | 中车兰州机车有限公司 | Traction frequency convertor testing device |
| CN106443280B (en) * | 2016-11-21 | 2023-08-08 | 中车兰州机车有限公司 | Traction frequency converter testing device |
| CN115267411A (en) * | 2022-06-16 | 2022-11-01 | 石家庄开宇工控设备有限公司 | Frequency converter test system and frequency converter test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20150415 |
|
| EXPY | Termination of patent right or utility model |