CN2261111Y - Frequency-converter and industrial-frequency power-supply double-way switchover device - Google Patents
Frequency-converter and industrial-frequency power-supply double-way switchover device Download PDFInfo
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- CN2261111Y CN2261111Y CN 96231153 CN96231153U CN2261111Y CN 2261111 Y CN2261111 Y CN 2261111Y CN 96231153 CN96231153 CN 96231153 CN 96231153 U CN96231153 U CN 96231153U CN 2261111 Y CN2261111 Y CN 2261111Y
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Abstract
The utility model discloses a frequency-converter and industrial-frequency power-supply double-way switchover device, a transformer B< 1 > of a phase discriminator is primarily connected with the AC; a B< 2 > is primarily connected with output ends U, V of a frequency converter; a fourth foot of a T< 3 > is connected with an input end A of an IC < 4 >; a transformer B< 4 > of a voltage amplitude discriminator is primarily connected with the AC; a B< 5 > is primarily connected with the U, V of the output end of the frequency converter; a fourth foot of a T< 4 > is connected with an input end B of the IC< 4 >; a third foot of a testing circuit IC< 3 > of 50 cycles is connected with an output end VF of the frequency converter; a fourth foot of a T< 5 > is connected with an input end C of the IC< 4 >; an output end Y of the IC< 4 > is connected with a first foot of a T< 6 >; a fifth foot of the optical coupling device T< 6 > is connected with a relay J, and normally open contacts of the J are connected in a starting circuit of motors in series. The frequency-converter and industrial-frequency power-supply double-way switchover device can sequentially start a plurality of the motors; area of electric control is reduced; soft starting is realized, and switching is smoothly conducted.
Description
The utility model relates to a kind of frequency converter driving of asynchronous motor and the switching device shifter between the power frequency supply driving.
At present, in the occasion of many pump or fans of needs, air-conditioning parallel connection, when using frequency control, many frequency converters of the employing that has are implemented control, and frequency converter of the employing that has is implemented control.The former has several motors, must join several frequency converters, causes investment big, and floor space is big.The latter often adopts the motor (pump or fan, air-conditioning) that can make speed governing operation to be connected with frequency converter all the time, when other motor is desired to put into operation, adopts self-starting method or reduced voltage starting method (or Y-△ conversion method of starting) to start.Be transformed into power frequency supply and drive if driven by frequency converter, be earlier motor and frequency converter to be broken away from, treat that stall is inactive state after, use traditional starting method starting again, change common frequency power network over to and power.During electric motor starting and implement by frequency converter to exist impulse current when power frequency supply switches, totally unfavorable to mains supply stability, make power factor decline.Exist reactive power in the motor starting process, the starting energy consumption is big and unfavorable to the operating mode stability of system.
The purpose of this utility model provides a kind of frequency converter and the two-way switch of power frequency supply, it can make the starting of a Frequency Converter Control multiple electric motors, non-impact current at electric motor starting and in by frequency converter and power frequency supply handoff procedure promptly reaches soft start, takes over seamlessly.
The purpose of this utility model be achieved in that this switch by phase-shift discriminator, voltage amplitude discriminator, 50 all good testing circuits, allow gate circuit and output control circuit to form.
The transformer B of phase-shift discriminator
1Elementary connecing exchanges 380V, the transformer B of phase-shift discriminator
2Elementary output U and the V that connects frequency converter; The optocoupler T of phase-shift discriminator output
34 pin connect and allow gate circuit IC
4Input A.The transformer B of voltage amplitude discriminator
4Elementary connecing exchange 380V, the transformer B of voltage amplitude discriminator
5Elementary inverter output terminal U and the V of connecing; The Light Coupled Device T of voltage amplitude discriminator output
44 pin connect and allow gate circuit IC
4Input B.The input IC of 50 all good testing circuits
33 pin meet the output VF of frequency converter; The optocoupler T of the output of 50 all good testing circuits
54 pin connect and allow gate circuit IC
4Input C.Allow gate circuit IC
4Output Y meet the optocoupler T of output control circuit
61 pin, optocoupler T
65 pin succeed electrical equipment J, another termination+12V of relay J, optocoupler T
64 pin ground connection, 2 pin connect virtually; The normally opened contact of the relay J of output control circuit is serially connected in the motor starting circuit.
Described phase-shift discriminator is to constitute like this: transformer B
1Secondary two ends connect transistor T respectively
1Base stage and ground, B
2Elementary two ends connect transistor T respectively
2Base stage and ground; Transistor T
1Grounded emitter, collector electrode meet transformer B
3An elementary end; Transistor T
2Grounded emitter, collector electrode meet transformer B
3The elementary other end; Transformer B
3The primary center tap connects+24V, and secondary two ends connect the interchange input two ends of full-bridge Q respectively; The dc output end "+" of full-bridge Q meets capacitor C
1Positive pole and IC
13 pin, "-" ground connection, capacitor C
1Minus earth; Potentiometer W
1Fixedly two ends connect respectively+12V and ground, activity termination IC
12 pin; IC
18 pin connect+12V, 4 pin ground connection, 1 pin meets capacitor C
2Positive pole, resistance R
1And T
31 pin, resistance R
1Another termination+12V, capacitor C
2Minus earth; T
32 pin ground connection, 5 pin connect+5V, 4 pin connecting resistance R
3And IC
4A end, resistance R
3Another termination virtually.
Described voltage amplitude discriminator is to constitute like this: transformer B
4A secondary terminating diode D
1Positive pole, other end ground connection; Diode D
1Negative pole meets capacitor C
4Positive pole and potentiometer W
2The upper end, capacitor C
4Minus earth, potentiometer W
2Lower end ground connection, center termination IC
26 pin; Transformer B
5A secondary terminating diode D
2Positive pole, other end ground connection; Diode D
2Negative pole meets capacitor C
5Positive pole and IC
25 pin, capacitor C
5Minus earth; IC
28 pin connect+12V, 4 pin ground connection, 7 pin meet capacitor C
6Positive pole, R
4And T
41 pin; Resistance R
4Another termination+12V, capacitor C
6Minus earth; T
42 pin ground connection, 5 pin connect+5V, 4 pin connecting resistance R
6And IC
4B end, resistance R
6Another termination virtually.
Described 50 all good testing circuits are to constitute like this: IC
33 pin meet capacitor C
7Positive pole and resistance R
8, capacitor C
7Minus earth, resistance R
8Other end ground connection; IC
32 pin meet potentiometer W
3Sliding end, potentiometer W
3Last termination+12V, lower end ground connection; IC
38 pin connect+12V, 4 pin ground connection, 1 pin meets capacitor C
8Positive pole, T
51 pin and resistance R
5, resistance R
5Another termination+12V, capacitor C
8Minus earth; T
52 pin ground connection, 5 pin connect+5V, 4 pin connecting resistance R
7And IC
4C end, resistance R
7Another termination virtually.
The utility model has the advantages that: but make a frequency converter sequential firing multiple electric motors, save the starting equipment investment, reduce the area between distribution control, non-impact current when electric motor starting and switching has been realized soft start, takes over seamlessly, reduce reactive power, helped the prolongation of electrical machinery life.
Elaborate below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Motor winding diagram when Fig. 3 implements for Fig. 1.
Motor starting circuit figure when Fig. 4 implements for Fig. 1
The device that uses among the figure is as follows:
| The device code name | Model specification | The device code name | Model specification |
| B 1 B 2 B 3 B 4 B 5 T 1 T 2 T 3 T 4 T 5 T 6 IC 1 IC 2 IC 3 IC 4 W 1 W 2 W 3 | 380V/ | Q R 1 R 3 R 4 R 5 R 6 R 7 R 8 C 1 C 2 C 4 C 5 C 6 C 7 C 8 J D 1 D 2 | 0.5A/50V 10KΩ 5KΩ 10KΩ 10KΩ 5.1KΩ 5.1KΩ 10KΩ 1μF/50V 1μF/50V 1μF/50V 1μF/50V 1μF/50V 1μF/50V 1μF/50V JQX-4F 2CZ84 2CZ84 |
Allow gate circuit IC
4Output relation be: Y=A*B*C
Phase-shift discriminator, voltage amplitude discriminator and 50 all good testing circuits can be used potentiometer W respectively
1, W
2, and W
3Be adjusted into optimum state.
When connecting the frequency converter incoming line and connect inverter output terminal to the line of motor, at first detect its phase sequence with phase-sequence meter, make it in full accord.
Transformer B with phase-shift discriminator
1Elementaryly be connected transformer B with A, the B of power frequency supply
2elementaryly link to each other with inverter output terminal U, V.Transformer B with the voltage amplitude discriminator
4elementaryly link to each other transformer B with A, the B of power frequency supply
5elementaryly link to each other with inverter output terminal U, V.
IC with 50 all good testing circuits
3Input link to each other with the output VF of frequency converter.
Start-up function method: press SST
1, contactor KM
2Work, contact KM
2Closure, A.C. contactor KM
0Work, frequency converter inserts common frequency power network and works, and KM is passed through in its output
2Main contacts is to exchanging motor M
1, M then
1Starting.
B when phase-shift discriminator
1, B
2During the output equal and opposite in direction, owing to be added to transistor T
1, T
2The phase place of base signal is opposite, through T
1, T
2Amplify back B
3No-output, full-bridge Q does not have direct current signal output, IC at this moment
1Export a high voltage, optocoupler T
3Conducting, R
3On have a high voltage to export to allow gate circuit IC
4A end (illustrate that the voltage of common frequency power network and the voltage-phase that frequency converter is exported are synchronous).
Transformer B when the voltage amplitude discriminator
5The voltage amplitude and the transformer B of output
4When the voltage amplitude of output equates, IC
2Export a high level, optocoupler T
4Conducting.At this moment, R
6On have a high level to export to allow gate circuit IC
4B end (voltage amplitude that common frequency power network be described is equal with the voltage amplitude of frequency converter output).
When the voltage-frequency signal of frequency converter output reaches 50 hertz, IC
3Export a high level, optocoupler T
5Conducting, R
7On have a high level to export to allow gate circuit IC
4C end.
When frequency converter output and common frequency power network equal when consistent three of phase place, amplitude and frequencies, the J closing of contact, contactor KM
1Work, its main contacts is connected.Because KM
1Auxiliary contact disconnects, KM
2Quit work motor M
1Then automatically switch on the common frequency power network.Because KM
2Quit work, its contact disconnects, KM
0Outage, frequency converter and electrical network break away from and quit work.At this moment, frequency converter can be used for the starting or the speed governing of other motor.
Claims (4)
1, the two-way switch of a kind of frequency converter and power frequency supply is characterized in that the transformer B of phase-shift discriminator
1Elementary connecing exchanges 380V, the transformer B of phase-shift discriminator
2Elementary output U and the V that connects frequency converter; The optocoupler T of phase-shift discriminator output
34 pin connect and allow gate circuit IC
4Input A; The transformer B of voltage amplitude discriminator
4Elementary connecing exchange 380V, the transformer B of voltage amplitude discriminator
5Elementary inverter output terminal U and the V of connecing; The Light Coupled Device T of voltage amplitude discriminator output
44 pin connect and allow gate circuit IC
4Input B; The input IC of 50 all good testing circuits
33 pin meet the output VF of frequency converter; The optocoupler T of the output of 50 all good testing circuits
54 pin connect and allow gate circuit IC
4Input C; Allow gate circuit IC
4Output Y meet the optocoupler T of output control circuit
61 pin, optocoupler T
65 pin succeed electrical equipment J, another termination+12V of relay J, optocoupler T
64 pin ground connection, 2 pin connect virtually; The normally opened contact of the relay J of output control circuit is serially connected in the motor starting circuit.
2, the two-way switch of frequency converter according to claim 1 and power frequency supply is characterized in that described phase-shift discriminator is transformer B
1Secondary two ends connect transistor T respectively
1Base stage and ground, B
2Elementary two ends connect transistor T respectively
2Base stage and ground; Transistor T
1Grounded emitter, collector electrode meet transformer B
3An elementary end; Transistor T
2Grounded emitter, collector electrode meet transformer B
3The elementary other end; Transformer B
3The primary center tap connects+24V, and secondary two ends connect the interchange input two ends of full-bridge Q respectively; The dc output end "+" of full-bridge Q meets capacitor C
1Positive pole and IC
13 pin, "-" ground connection, capacitor C
1Minus earth; Potentiometer W
1Fixedly two ends connect respectively+12V and ground, activity termination IC
12 pin; IC
18 pin connect+12V, 4 pin ground connection, 1 pin meets capacitor C
2Positive pole, resistance R
1And T
31 pin, resistance R
1Another termination+12V, capacitor C
2Minus earth; T
32 pin ground connection, 5 pin connect+5V, 4 pin connecting resistance R
3And IC
4A end, resistance R
3Another termination virtually.
3, the two-way switch of frequency converter according to claim 1 and power frequency supply is characterized in that described voltage amplitude discriminator is transformer B
4A secondary terminating diode D
1Positive pole, other end ground connection; Diode D
1Negative pole meets capacitor C
4Positive pole and potentiometer W
2The upper end, capacitor C
4Minus earth, potentiometer W
2Lower end ground connection, center termination IC
26 pin; Transformer B
5A secondary terminating diode D
2Positive pole, other end ground connection; Diode D
2Negative pole meets capacitor C
5Positive pole and IC
25 pin, capacitor C
5Minus earth; IC
28 pin connect+12V, 4 pin ground connection, 7 pin meet capacitor C
6Positive pole, R
4And T
41 pin; Resistance R
4Another termination+12V, capacitor C
6Minus earth; T
42 pin ground connection, 5 pin connect+5V, 4 pin connecting resistance R
6And IC
4B end, resistance R
6Another termination virtually.
4, the two-way switch of frequency converter according to claim 1 and power frequency supply is characterized in that described 50 all good testing circuits are IC
33 pin meet capacitor C
7Positive pole and resistance R
8, capacitor C
7Minus earth, resistance R
8Other end ground connection; IC
32 pin meet potentiometer W
3Sliding end, potentiometer W
3Last termination+12V, lower end ground connection; IC
38 pin connect+12V, 4 pin ground connection, 1 pin meets capacitor C
8Positive pole, T
51 pin and resistance R
5, resistance R
5Another termination+12V, capacitor C
8Minus earth; T
52 pin ground connection, 5 pin connect+5V, 4 pin connecting resistance R
7And IC
4C end, resistance R
7Another termination virtually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96231153 CN2261111Y (en) | 1996-01-25 | 1996-01-25 | Frequency-converter and industrial-frequency power-supply double-way switchover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96231153 CN2261111Y (en) | 1996-01-25 | 1996-01-25 | Frequency-converter and industrial-frequency power-supply double-way switchover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2261111Y true CN2261111Y (en) | 1997-08-27 |
Family
ID=33908406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96231153 Expired - Fee Related CN2261111Y (en) | 1996-01-25 | 1996-01-25 | Frequency-converter and industrial-frequency power-supply double-way switchover device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2261111Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233888A (en) * | 2013-05-14 | 2013-08-07 | 江苏大学 | Multi-pump switching energy-saving control system under single frequency conversion control |
| CN104753408A (en) * | 2015-03-20 | 2015-07-01 | 苏寿喜 | High power motor switching control system and switching method |
-
1996
- 1996-01-25 CN CN 96231153 patent/CN2261111Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233888A (en) * | 2013-05-14 | 2013-08-07 | 江苏大学 | Multi-pump switching energy-saving control system under single frequency conversion control |
| CN104753408A (en) * | 2015-03-20 | 2015-07-01 | 苏寿喜 | High power motor switching control system and switching method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |