CN2205609Y - AC frequency conversion stepless speed regulator for rotary dining hall revolving stage - Google Patents
AC frequency conversion stepless speed regulator for rotary dining hall revolving stage Download PDFInfo
- Publication number
- CN2205609Y CN2205609Y CN 94245237 CN94245237U CN2205609Y CN 2205609 Y CN2205609 Y CN 2205609Y CN 94245237 CN94245237 CN 94245237 CN 94245237 U CN94245237 U CN 94245237U CN 2205609 Y CN2205609 Y CN 2205609Y
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- CN
- China
- Prior art keywords
- stepless speed
- control circuit
- frequency conversion
- potentiometer
- circuit
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an AC frequency conversion stepless speed regulator for a rotary dining table. The main circuit of the utility model is provided with an AC frequency converter and an AC asynchronous motor; a control circuit is provided with duplex potentiometers W1 and W2, a resistor R1, an operational amplifier T4 (UA74), a potentiometer W3, a three-position half A/D conversion chip T5 (7107), and an inversed proportion voltage digital displaying circuit which is composed of an external connecting resistor R, a capacitor C and a nixie pipe. The utility model can display the corresponding digital of the time that a rotary table rotates a circle; the accuracy of the isochronous speed regulation can be ensured, and the running stability and reliability of the rotating dining table in the country can be enhanced.
Description
The utility model is related to be a kind of revolving restaurant turntable AC frequency conversion stepless speed-regulating device.
The revolving restaurant turntable generally adopts the stepless speed-regulating device that DC motor or electromagnetic varispeed motor and control system thereof are formed at present.The former, the electric control circuit more complicated, failure rate height, working service be difficulty relatively.The latter, the technical two motors higher synchronous adjusting speed accuracy that will guarantee is relatively more difficult, causes turntable galloping, easily produces shake, and for the motor with power, volume and weight is all very big.
The purpose of this utility model is to overcome the deficiencies in the prior art and proposes a kind of novel revolving restaurant turntable AC frequency conversion stepless speed-regulating device, be used for replacing existing DC motor or electromagnetic varispeed motor stepless speed-regulating device, to improve the stationarity and the reliability of revolving restaurant turntable running.
Content of the present utility model: revolving restaurant turntable AC frequency conversion stepless speed-regulating device is made of main circuit and control circuit.Main circuit has two (or many) AC asynchronous motor, frequency converter; Control circuit is partly reached the inverse proportion voltage digital display circuit part of being made up of duplex potentiometer W1, W2, resistance R 1, operational amplifier T4, potentiometer W3, three and half A/D conversion chip T5 and outer meeting resistance R, capacitor C and charactron by power unit, operating system.
Its advantage is that rotating speed control stabilization, continuity are good, running is reliable; many AC asynchronous motor parallel runnings can realize same speed control exactly; can directly show the time that turntable rotates a circle; the efficient height, long service life can realize level and smooth startup; start-up time is adjustable between second at 0.1 second～hundreds of; Operation and Maintenance is simple, and defencive function is complete.
Accompanying drawing is revolving restaurant turntable AC frequency conversion stepless speed-regulating device circuit theory diagrams.
Below in conjunction with accompanying drawing the utility model is described in detail.
The utility model is by main circuit, control circuit two most of revolving restaurant turntable AC frequency conversion stepless speed-regulating devices of forming, main circuit is by air switch K, fuse RD, thermal relay RJ1, RJ2, frequency converter F, AC asynchronous motor M1, M2 forms, power unit has noise filter LB in the control circuit, power transformer B, rectifier bridge D1, D2, three terminal regulator T1, T2, T3 and filter capacitor C1, C2, C3, C4, operating system partly has contactor C, relay J 1, J2, J3, J4, button A1, A2, A3, A4, A5 is characterized in that control circuit also has by duplex potentiometer W1, W2, resistance R 1, operational amplifier T4(UA74), potentiometer W3, three and half A/D conversion chip T5(7107) and outer meeting resistance R, the inverse proportion voltage digital display circuit part that capacitor C and charactron are formed.W2 top in the duplex potentiometer, terminal take inverse state to connect with W1 top, terminal in the duplex potentiometer.
Three terminal regulator T1, T2, T3 provide galvanic current respectively and press, and the control voltage that the W1 among duplex potentiometer W1, the W2 provides is used for reconciling the output frequency of frequency converter F, thereby reach the purpose of control AC asynchronous motor M1, M2 rotating speed.Press power supply switch knob A5, the self-insurance of the contactor C closing of contact, power connection, there is a voltage to act on W1 in the duplex potentiometer, the two ends of W2, by giving the voltage of a control frequency of frequency converter F after the W1 dividing potential drop in the duplex potentiometer, give operational amplifier T4(UA74 by the W2 in the duplex potentiometer) the inverse proportion voltage of a correspondence of input, amplify by operational amplifier T4, potentiometer W3 dividing potential drop acts on three and half A/D conversion chip T5(7107) on, passing through outer meeting resistance R, capacitor C and charactron constitute inverse proportion voltage digital potential circuit, exports whenever the circle numeral demonstration of corresponding time of a turntable.
The W1, the W2 that reconcile in the duplex potentiometer get a designated value, and at this moment frequency converter F does not work.Press start button A2, relay J 2 gets electric, the C of frequency converter F
OMPoint and R
UNPoint engages, and the output frequency of frequency converter F rises to designated value from 0, and this rise time reconciles by frequency converter F internal conversion switch.
A1 is a stop button, and A4 is the power cutoff button, and two thermal relay RJ1, RJ2 can indicate which platform overload of AC asynchronous motor M1, M2 respectively, and autostop.Various protections such as all the other overvoltages, overcurrent, under-voltage, phase shortage are finished by frequency converter F.Complete machine was reported to the police and is quit work when fault took place, and fault is pressed reset button A3 earlier after getting rid of, and can repeat work again by start button A2 again.Be to adapt to revolving restaurant turntable requirements of one's work, the utility model is connected into after the power failure reset mode automatically, in case meet accident.
Claims (2)
1, a kind of by main circuit, control circuit two most of revolving restaurant turntable AC frequency conversion stepless speed-regulating devices of forming, main circuit is by air switch K, fuse RD, thermal relay RJ1, RJ2, frequency converter F, AC asynchronous motor M1, M2 forms, power unit has noise filter LB in the control circuit, power transformer B, rectifier bridge D1, D2, three terminal regulator T1, T2, T3 and filter capacitor C1, C2, C3, C4, operating system partly has contactor C, relay J 1, J2, J3, J4, button A1, A2, A3, A4, A5 is characterized in that control circuit also has by duplex potentiometer W1, W2, resistance R 1, operational amplifier T4 (UA74), potentiometer W3, three and half A/D conversion chip T5 (7107) and outer meeting resistance R, the inverse proportion voltage digital display circuit part that capacitor C and charactron are formed.
2, revolving restaurant according to claim 1 turntable AC frequency conversion stepless speed-regulating device is characterized in that the W2 top in the duplex potentiometer in the control circuit, terminal take inverse state to connect with W1 top, terminal in the duplex potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94245237 CN2205609Y (en) | 1994-11-05 | 1994-11-05 | AC frequency conversion stepless speed regulator for rotary dining hall revolving stage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94245237 CN2205609Y (en) | 1994-11-05 | 1994-11-05 | AC frequency conversion stepless speed regulator for rotary dining hall revolving stage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2205609Y true CN2205609Y (en) | 1995-08-16 |
Family
ID=33851093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94245237 Expired - Fee Related CN2205609Y (en) | 1994-11-05 | 1994-11-05 | AC frequency conversion stepless speed regulator for rotary dining hall revolving stage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2205609Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135089B (en) * | 2010-01-25 | 2015-06-17 | 大亚科技股份有限公司 | Synchronizing device for gel-filling peristaltic pump of tobacco tow forming machine |
-
1994
- 1994-11-05 CN CN 94245237 patent/CN2205609Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135089B (en) * | 2010-01-25 | 2015-06-17 | 大亚科技股份有限公司 | Synchronizing device for gel-filling peristaltic pump of tobacco tow forming machine |
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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 |