CN106300274A - Converter running protection circuit - Google Patents
Converter running protection circuit Download PDFInfo
- Publication number
- CN106300274A CN106300274A CN201610783408.XA CN201610783408A CN106300274A CN 106300274 A CN106300274 A CN 106300274A CN 201610783408 A CN201610783408 A CN 201610783408A CN 106300274 A CN106300274 A CN 106300274A
- Authority
- CN
- China
- Prior art keywords
- converter
- auxiliary reclay
- stop button
- protection circuit
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
Abstract
A kind of running protection circuit of converter; including catalyst, start button, stop button and auxiliary reclay; wherein; the normally opened contact of auxiliary reclay is connected in parallel with stop button; the coil of auxiliary reclay is connected in series with converter run switch, is provided with and improves circuit between catalyst and converter main body.Therefore, after converter run switch closes, the coil of auxiliary reclay obtains electric, the normally opened contact Guan Bi of auxiliary reclay, makes stop button short circuit.When needs make converter quit work, directly operate stop button, short circuit due to the normally opened contact of auxiliary reclay, make stop button inoperative, and only in first closing converter shift knob, turn off the normal mode of operation of stop button, converter is made to quit work, thus effectively prevent and directly operate the damage that converter is caused by stop button because of staff, extend the service life of converter, improve circuit and can improve the quality of frequency converter output voltage pulse.
Description
Technical field
The invention belongs to frequency converter equipment field, particularly relate to a kind of converter running protection circuit.
Background technology
Converter (Variable-frequency Drive, VFD) is a kind of application converter technique and microelectric technique, logical
Cross and change the working power Frequency Patterns of motor to control the electric control appliance of ac motor.The electricity of converter output at present arrives
The startup of motor/stopping control process is: during startup, and converter is energized by first operation start button, then starts converter
Shift knob, thus converter output electricity is to motor, makes motor obtain electric operation；During stopping, it is first shut off converter shift knob,
Making converter stop output electricity and arrive motor, then converter power-off, a working cycle are completed by operation stop button.
But in actual mechanical process, a lot of staff directly operate stop button, power-off unexpected to converter, this
Time, the coasting of motor makes motor be transformed into electromotor, and owing to converter power-off quits work, thus converter is without putting
Electricity loop so that the electricity that motor exports to converter causes damage to converter, causes the converter life-span to reduce.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of converter running protection circuit,
To solve the unexpected power-off of converter in prior art, now, the coasting of motor makes motor be transformed into electromotor, due to frequency conversion
Device power-off quits work, thus converter is without discharge loop so that converter is caused by the electricity that motor exports to converter
Damage, cause the technical problem that the converter life-span reduces.
Technical scheme is as follows:
A kind of converter running protection circuit, described converter include converter main body, motor, converter run switch,
Frequency Converter Control coil and converter shift knob, described running protection circuit includes: catalyst, start button, stop button
And auxiliary reclay；
Main contact and the described converter main body of described catalyst are connected between the first alternating current power supply and described motor；
Described stop button and described start button are connected between the coil of the second alternating current power supply and described catalyst, institute
The normally opened contact stating auxiliary reclay is connected in parallel with described stop button, and the normally opened auxiliary contact of described catalyst open with described
Dynamic button is connected in parallel；
Described converter shift knob is connected between DC source and described Frequency Converter Control coil, and described converter is transported
Row switch series is associated between the coil of described DC source and described auxiliary reclay, and the coil of described auxiliary reclay is described
Obtain electric after converter run switch Guan Bi, make the normally opened contact of described auxiliary reclay close；
Being provided with between described catalyst and converter main body and improve circuit, the described circuit that improves includes resistance R1 and electric capacity
C1, described electric capacity C1 are connected between catalyst and converter main body, and described resistance R1 is in parallel with electric capacity C1, and described electric capacity C1 is also
Connect a divider resistance R2.
Preferably, the output voltage of described first alternating current power supply is 380V.
Preferably, the output voltage of described second alternating current power supply is 220V.
Preferably, the output voltage of described DC source is 24V.
Preferably, described auxiliary reclay is NY series auxiliary reclay.
Preferably, described auxiliary reclay is MY series auxiliary reclay
Preferably, described catalyst is A.C. contactor.
Preferably, described A.C. contactor is CJ Series AC Contactor.
Preferably, described A.C. contactor is B Series AC Contactor.
Preferably, it is connected in series with mains transformer and rectified current between described first alternating current power supply and described DC source
Road.
Compared with prior art, the present invention has a following beneficial effect:
The invention provides a kind of converter running protection circuit, including catalyst, start button, stop button and centre
Relay, wherein, the normally opened contact of auxiliary reclay is connected in parallel with stop button, and the coil of auxiliary reclay is transported with converter
Row switch is connected in series.Therefore, after converter run switch closes, the coil of auxiliary reclay obtains electric, auxiliary reclay
Normally opened contact closes, and makes stop button short circuit.When needs make converter quit work, directly operate stop button, due in
Between the short circuit of normally opened contact of relay so that stop button is inoperative, and only in first closing converter shift knob,
Turn off the normal mode of operation of stop button, make converter quit work, thus effectively prevent because staff directly grasps
Making the damage that converter is caused by stop button, extend the service life of converter, converter main body connects to have improves circuit,
Can prevent from removing the spike on power supply signal waveform, improve the quality of frequency converter output voltage pulse.
Figure of description
Fig. 1 is the circuit diagram of the running protection circuit of converter of the present invention.
Detailed description of the invention
Seeing Fig. 1, the embodiment of the invention discloses the circuit diagram of the running protection circuit of a kind of converter, described operation is protected
Protection circuit is applied to converter, and described converter includes converter main body 11, motor 12, converter run switch S4, converter
Control coil KM2 and converter shift knob S3, described running protection circuit includes: catalyst KM1, start button S2, stopping
Button S1 and auxiliary reclay KA；
Wherein:
Main contact and the converter main body 11 of catalyst KM1 are connected between the first alternating current power supply Vcc and motor 12；
Stop button S1 and start button S2 are connected on the second alternating current power supply, and (wherein, in Fig. 1, L1 represents the second alternating current power supply
Phase line, N represents the zero line of the second alternating current power supply) and the coil of catalyst KM1 between, the normally opened contact of auxiliary reclay KA with
Stop button S1 is connected in parallel, and the normally opened auxiliary contact of catalyst KM1 are connected in parallel with start button S2；
Converter shift knob S3 is connected between DC source and Frequency Converter Control coil KM2, converter run switch
S4 is connected between the coil of described DC source and auxiliary reclay KA, and the coil of auxiliary reclay KA runs at converter and opens
Obtain electric after closing S4 Guan Bi, make the normally opened contact of auxiliary reclay KA close.
Being provided with between described catalyst and converter main body and improve circuit, the described circuit that improves includes resistance R1 and electric capacity
C1, the capacity of described electric capacity C0 is 2.2UF.Described electric capacity C1 is connected between catalyst and converter main body, described resistance R1
In parallel with electric capacity C1, described electric capacity C1 also connects a divider resistance R2.
Concrete, the startup/stopping control process of converter output electricity to motor 12 is:
When converter starts, first operation start button S2, the coil of catalyst KM1 obtains electric, and catalyst KM1's is normally opened auxiliary
Helping closing of contact self-locking, the main contact Guan Bi of catalyst KM1, converter is energized；Then converter shift knob S3, frequency conversion are started
Device control coil KM2 obtains electric work, and converter main body 11 exports electricity and obtains electric operation to motor 12, motor 12.
When converter stops, it is first shut off converter shift knob S3, Frequency Converter Control coil KM2 power-off, converter master
Body 11 stops output electricity and arrives motor 12, then operation stop button S1, converter power-off, thus converter output electricity is to motor 12
The startup/cycle of quitting work complete.
In the present invention, the normally opened contact of auxiliary reclay KA is connected in parallel with stop button S1, auxiliary reclay KA's
Coil is connected in series with converter run switch S4.Therefore, after converter run switch S4 closes, the line of auxiliary reclay KA
Enclose electric, the normally opened contact Guan Bi of auxiliary reclay KA, make stop button S1 short circuit.When needs make converter quit work,
Directly operation stop button S1, due to the short circuit of the normally opened contact of auxiliary reclay KA so that stop button S1 is inoperative, and
Only in first closing converter shift knob S3, turn off the normal mode of operation of stop button S1, make converter stop work
Make, thus effectively prevent and directly operate the damage that converter is caused by stop button S1 because of staff, decrease converter
Fault-free machine stop times, extends the service life of converter.
In the present embodiment, the output voltage of the first alternating current power supply Vcc is 380V.
The output voltage of the second alternating current power supply is 220V.
The output voltage of DC source is 24V.
It should be noted is that, be connected in series with between the first alternating current power supply Vcc and DC source mains transformer and
Rectification circuit (not shown in figure 1), mains transformer, for the voltage of the first alternating current power supply Vcc output is carried out blood pressure lowering, obtains
Alternating voltage after blood pressure lowering, rectification circuit, for the alternating voltage after blood pressure lowering is carried out rectification, obtains DC voltage, this unidirectional current
Pressure is i.e. the voltage of DC source output.
Wherein, auxiliary reclay KA can be NY series auxiliary reclay, or is MY series auxiliary reclay.
Catalyst KM1 in the present embodiment is A.C. contactor.
A.C. contactor can be CJ Series AC Contactor, or is B collection of contact device.
It should be noted is that, as long as using the technological means of stop button S1 short circuit, reaching to avoid because of work
Personnel directly operate stop button S1 and converter cause the purpose of damage, are all protection scope of the present invention.
The structure of the summary present invention understands with principle, the invention provides a kind of converter running protection circuit, bag
Including catalyst, start button, stop button and auxiliary reclay, wherein, the normally opened contact of auxiliary reclay is with stop button also
Connection connects, and the coil of auxiliary reclay is connected in series with converter run switch.Therefore, after converter run switch closes,
The coil of auxiliary reclay obtains electric, the normally opened contact Guan Bi of auxiliary reclay, makes stop button short circuit.When needs make converter stop
When only working, directly operate stop button, due to the short circuit of the normally opened contact of auxiliary reclay so that stop button does not acts as
With, and only in first closing converter shift knob, turn off the normal mode of operation of stop button, make converter stop work
Make, thus effectively prevent and directly operate the damage that converter is caused by stop button because of staff, extend converter
In service life, converter main body connects to have improves circuit, can prevent from removing the spike on power supply signal waveform, improve converter
The quality of output voltage pulse.
Claims (7)
1. a converter running protection circuit, it is characterised in that described converter includes converter main body, motor, converter
Run switch, Frequency Converter Control coil and converter shift knob, described running protection circuit includes: catalyst, start button,
Stop button and auxiliary reclay；
Main contact and the described converter main body of described catalyst are connected between the first alternating current power supply and described motor；
Described stop button and described start button are connected between the coil of the second alternating current power supply and described catalyst, described in
Between the normally opened contact of relay be connected in parallel with described stop button, the normally opened auxiliary contact of described catalyst are pressed with described startup
Button is connected in parallel；
Described converter shift knob is connected between DC source and described Frequency Converter Control coil, and described converter runs and opens
Pass is connected between the coil of described DC source and described auxiliary reclay, and the coil of described auxiliary reclay is in described frequency conversion
Obtain electric after device run switch Guan Bi, make the normally opened contact of described auxiliary reclay close；
Being provided with between described catalyst and converter main body and improve circuit, the described circuit that improves includes resistance R1 and electric capacity C1,
Described electric capacity C1 is connected between catalyst and converter main body, and described resistance R1 is in parallel with electric capacity C1, and described electric capacity C1 also goes here and there
Join a divider resistance R2, between described first alternating current power supply and described DC source, be connected in series with mains transformer and rectified current
Road.
2. converter running protection circuit as claimed in claim 1, it is characterised in that the output electricity of described first alternating current power supply
Pressure is 380V.
3. converter running protection circuit as claimed in claim 1, it is characterised in that the output electricity of described second alternating current power supply
Pressure is 220V.
4. converter running protection circuit as claimed in claim 2, it is characterised in that the output voltage of described DC source is
24V。
5. converter running protection circuit as claimed in claim 2, it is characterised in that described auxiliary reclay is in NY series
Between relay.
6. converter running protection circuit as claimed in claim 1, it is characterised in that described auxiliary reclay is in MY series
Between relay.
7. converter running protection circuit as claimed in claim 1, it is characterised in that described catalyst is A.C. contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610783408.XA CN106300274A (en) | 2016-08-31 | 2016-08-31 | Converter running protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610783408.XA CN106300274A (en) | 2016-08-31 | 2016-08-31 | Converter running protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106300274A true CN106300274A (en) | 2017-01-04 |
Family
ID=57672676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610783408.XA Pending CN106300274A (en) | 2016-08-31 | 2016-08-31 | Converter running protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106300274A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203056982U (en) * | 2012-12-14 | 2013-07-10 | 台州富凌电气有限公司 | Integrated frequency converter used for gang saw machine |
| CN203086326U (en) * | 2013-01-08 | 2013-07-24 | 科比传动技术（上海）有限公司 | Filtering unit and frequency converter |
| CN103825470A (en) * | 2014-03-10 | 2014-05-28 | 台州富凌电气有限公司 | Four-quadrant frequency converter |
| CN203707753U (en) * | 2013-12-20 | 2014-07-09 | 四川达威科技股份有限公司 | Operation protection circuit for inverter |
-
2016
- 2016-08-31 CN CN201610783408.XA patent/CN106300274A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203056982U (en) * | 2012-12-14 | 2013-07-10 | 台州富凌电气有限公司 | Integrated frequency converter used for gang saw machine |
| CN203086326U (en) * | 2013-01-08 | 2013-07-24 | 科比传动技术（上海）有限公司 | Filtering unit and frequency converter |
| CN203707753U (en) * | 2013-12-20 | 2014-07-09 | 四川达威科技股份有限公司 | Operation protection circuit for inverter |
| CN103825470A (en) * | 2014-03-10 | 2014-05-28 | 台州富凌电气有限公司 | Four-quadrant frequency converter |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |
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| RJ01 | Rejection of invention patent application after publication |