CN2181131Y - AC motor speed-regulator - Google Patents
AC motor speed-regulator Download PDFInfo
- Publication number
- CN2181131Y CN2181131Y CN 94202971 CN94202971U CN2181131Y CN 2181131 Y CN2181131 Y CN 2181131Y CN 94202971 CN94202971 CN 94202971 CN 94202971 U CN94202971 U CN 94202971U CN 2181131 Y CN2181131 Y CN 2181131Y
- Authority
- CN
- China
- Prior art keywords
- phase
- triode thyristor
- bidirectional triode
- resistance
- bidirectional
- 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.)
- Expired - Fee Related
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to an AC motor speed-regulator, which is characterized in that each phase of three-phase AC supply which supplies power to a three-phase AC motor is connected in series with a bidirectional controlled silicon, a trigger network realizes zero cross, phase shifting, voltage regulation, and speed regulation, the trigger network which generates trigger signals is composed of a triple coaxial potentiometer, a capacitance-resistance network, and a bidirectional trigger diode. The utility model has the advantages of simple structure, high reliability, and low cost.
Description
The utility model relates to a kind of speed regualtion of AC motor device, more particularly, relates to a kind of zero passage of three phase alternating current motor, phased combined speed regulating device.
Existing RHVC, costs an arm and a leg at the equipment complexity.Other speed regulating device comprise pressure-speed regulating device, also have complex structure, the shortcoming that cost is high.Also has the slippage electromagnetic adjustable speed motor, their volume heavinesses.Particularly for the speed regulating device of power at the motor below 10 kilowatts, above-mentioned shortcoming is more outstanding.
The purpose of this utility model is to provide a kind of easy, motor speed control device below 10 kilowatts that cost is low, and that this speed regulating device have is simple in structure, reliability is high and cheap.
The purpose of this utility model be achieved in that to the three-phase alternating-current supply of three-phase alternating-current motor power supply each mutually in, the bidirectional triode thyristor of connecting, one end of its a control utmost point and a bidirectional trigger diode links to each other, the other end of bidirectional trigger diode, connect on the series connection node of a resistance capacitance series arm, form capacitance-resistance phase-shift network after a described resistance capacitance series arm and the capacitor parallel connection with two terminals, one end of described capacitance-resistance phase-shift network, link to each other with the negative electrode of bidirectional triode thyristor, the other end of described capacitance-resistance phase-shift network, by coaxial three on lines in adjustable potentiometer one, be connected on the anode of bidirectional triode thyristor, the intermediate terminal of described potentiometer links to each other with the anode of bidirectional triode thyristor, is provided with three input terminals, be used for connecting three phase mains, three lead-out terminals are used for connecting motor, and all electric components are installed on the control board that places in the housing.
The utility model has the advantages that significantly, adopt the bidirectional triode thyristor element and be parallel to capacitance-resistance phase-shift network between its anode negative electrode, just can realize zero passage, phased combination variable voltage control, have advantage simple in structure, that reliability is high and with low cost.
Fig. 1 is principles of construction figure of the present utility model.
Below in conjunction with a description of drawings embodiment of the present utility model.
Referring to Fig. 1, A, B, C are three input terminals of the utility model speed regulating device, are used for connecting 380 volts of power supplys, A ', and B ', C ' they are three lead-out terminals, are used for connecting motor, three bidirectional triode thyristor elements T r
1-Tr
3Be series in the three phase mains, the triggering loop of every bidirectional triode thyristor element comprises bidirectional trigger diode BD, resistance R
1, capacitor C
1, C
2And coaxial three on lines are around adjustable potentiometer RW
1-RW
3C
1, C
2Capacity be used for determining the minimum output voltage of this device, this voltage for example, can be adjusted into this voltage about 50 volts corresponding to the minimum speed of motor.Change the tapped position of coaxial three on lines around potentiometer, scalable zero passage, phased synchronization pulse make bidirectional triode thyristor be operated in zero passage, phased operating state, thereby change the voltage that is added on the three-phase alternating-current motor, correspondingly, regulated the speed of motor.Because the parameter of every each similar elements in mutually is all identical, has adopted three coaxial lines around adjustable potentiometer again, can realize that three-phase equilibrium regulates.
Claims (2)
1, a kind of speed regualtion of AC motor device, comprise three input terminals (A, B, C), be used for connecting three phase mains, three lead-out terminals (A ', B ', C '), be used for connecting motor, it is characterized in that, also comprise the bidirectional triode thyristor element (Tr that is series in the three-phase alternating-current supply
1-Tr
3), the control utmost point of described bidirectional triode thyristor element extremely links to each other with one of a bidirectional trigger diode (BD), and another utmost point of bidirectional trigger diode is linked by resistance (R
1) electric capacity (C
2) on the series connection node of series arm, a described resistance capacitance branch road and a capacitor (C
1) parallel connection, formation has the capacitance-resistance phase-shift network of two terminals, one end of described capacitance-resistance phase-shift network links to each other with the negative electrode of described bidirectional triode thyristor, the other end is by coaxial three on lines being connected on the anode of bidirectional triode thyristor in potentiometer, the intermediate terminal of coaxial three potentiometers, link to each other with the anode of bidirectional triode thyristor, all electric components all are contained on the control board that is installed in the housing.
2, speed regualtion of AC motor device as claimed in claim 1 is characterized in that, the element of the same name of each in the described three-phase has identical parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202971 CN2181131Y (en) | 1994-02-05 | 1994-02-05 | AC motor speed-regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202971 CN2181131Y (en) | 1994-02-05 | 1994-02-05 | AC motor speed-regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2181131Y true CN2181131Y (en) | 1994-10-26 |
Family
ID=33822611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94202971 Expired - Fee Related CN2181131Y (en) | 1994-02-05 | 1994-02-05 | AC motor speed-regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2181131Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183729A (en) * | 2011-03-11 | 2011-09-14 | 中钢集团衡阳重机有限公司 | Method for debugging cut-off current parameter of excitation circuit of excavator generator set |
| CN109347401A (en) * | 2018-11-08 | 2019-02-15 | 深圳和而泰智能控制股份有限公司 | Motor speed control device, motor and food processing equipment |
-
1994
- 1994-02-05 CN CN 94202971 patent/CN2181131Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183729A (en) * | 2011-03-11 | 2011-09-14 | 中钢集团衡阳重机有限公司 | Method for debugging cut-off current parameter of excitation circuit of excavator generator set |
| CN109347401A (en) * | 2018-11-08 | 2019-02-15 | 深圳和而泰智能控制股份有限公司 | Motor speed control device, motor and food processing equipment |
| CN109347401B (en) * | 2018-11-08 | 2023-11-28 | 深圳和而泰智能控制股份有限公司 | Motor rotation speed control device, motor and food processing equipment |
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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 |