CN2152344Y - Bidirectional speed regulator for winding ac motor - Google Patents
Bidirectional speed regulator for winding ac motor Download PDFInfo
- Publication number
- CN2152344Y CN2152344Y CN 93201688 CN93201688U CN2152344Y CN 2152344 Y CN2152344 Y CN 2152344Y CN 93201688 CN93201688 CN 93201688 CN 93201688 U CN93201688 U CN 93201688U CN 2152344 Y CN2152344 Y CN 2152344Y
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- voltage regulator
- motor
- phase
- reactor
- phase reactor
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- Expired - Fee Related
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a novel bidirectional speed regulator for a winding type ac motor, which is composed of a three-phase controlled silicon ac voltage regulator and a three-phase reactor with the same iron core, wherein, the input terminal of the ac voltage regulator is connected with the output terminal of the three-phase reactor, and the connecting method of the output terminal of the ac voltage regulator is in a short circuit; the input terminal of the three-phase reactor is used as the connection terminal of the induction potential of a winding rotor of a motor; an impedance controller is connected with the controlled silicon control terminal of the ac voltage regulator, and the impedance controller, the controlled silicon control terminal of the ac voltage regulator, a potentiometer, reference voltage and the ground terminal form a phase control circuit. The utility model has the advantages that wireless speed regulation can be realized, and high harmonic is not fed back to an electric network; the utility model which also has the advantages of low cost and simple structure is suitable for being used for the bidirectional speed regulation and soft start for the winding type ac motor.
Description
The utility model belongs to the ac motor speed control device, particularly relates to a kind of by regulating the device that the impedance of wound type AC motor rotor equivalent realizes speed governing.
In the speed adjusting technique of existing wound type AC motor, controllable silicon string utmost point speed regulating device are used widely.But because its power factor is low, generally about 0.4～0.6, the electric current that feeds back to electrical network contains the contaminative high order harmonic component of suitable composition again, can not realize fast automatic bidirectional speed governing, apparatus cost is very high in addition, because these technological deficiencies, it is restricted realizing aspect higher economic benefit and the technical benefits.
Chinese patent 87107830.9 " a kind of energy-saving High Power Factor string utmost point speed regulating device " (open day 89.01.25.), form speed regulating device by rectifier, reactor, contravariant transformer, inverter direct-flow side at controllable silicon string utmost point speed regulating device, electronic switch in parallel, with it inverter voltage is carried out pulse-width modulation, so as to regulating rotating speed of motor.This scheme has obtained and has improved power factor and reduce the effect of harmonic current to electric network influencing.But the aforementioned disadvantages that relates to the speed governing of the string utmost point is still rare to solving, and particularly aspect the reduction apparatus cost, does not almost improve.
The purpose of this utility model is, relies on the three-phase controllable silicon AC voltage regulator directly to regulate the motor rotor equiva lent impedance, realizes the motor stepless time adjustment, to overcome the major defect of existing string utmost point speed adjusting technique, reaches simple in structure, practical purpose more.
New wound-rotor type alternating current motor bidirectional speed governing device of the present utility model, be made up of voltage regulator, reactor, it is characterized in that, voltage regulator is the three-phase controllable silicon AC voltage regulator, replace the rectifier in the controllable silicon string utmost point speed regulating device, reactor is the three-phase reactor of same iron core; The input of AC voltage regulator is connected with the output of three-phase reactor, and the output short circuit of AC voltage regulator connects; The input of three-phase reactor is as the incoming end of the wound-rotor induction gesture of motor; By inverter and contravariant transformer in the impedance controller replacement controllable silicon string utmost point speed regulating device, impedance controller is connected with the SCR control end of AC voltage regulator; SCR control end, potentiometer, reference voltage, earth terminal by impedance controller and AC voltage regulator constitute phase-control circuit.
Impedance controller described in the utility model is made up of frequency doubling attenuation device, synchronizing indicator, bidirectional pulse generator, direction controller.It is the control signal that produces one group of three-phase controllable silicon AC voltage regulator according to wound type AC motor rotor induction gesture.
During use, new wound-rotor type alternating current motor bidirectional speed governing device of the present utility model inserts induced potential by the motor wound rotor, by regulating the control signal of impedance controller, the size of the angle of flow of three-phase controllable silicon AC voltage regulator is controlled.When the silicon controlled angle of flow was big, the equiva lent impedance of motor rotor reduced, and made the electric current that flows through in the motor rotor increase, thereby produced moment of accelerating, and the rotating speed of motor raises; When the silicon controlled angle of flow hour, the equiva lent impedance of motor rotor raises, and makes the electric current that flows through in the motor rotor reduce, thereby reduces moment, and the rotating speed of motor reduces; When thyristor operating angle changes to standard-sized sheet is logical by zero, the rotating speed of motor just from zero to turning round continuously the rated speed.If switch any two-phase in the wound type AC motor stator side three phase mains, these speed regulating device are discerned automatically by the direction controller that is located in the impedance controller, and the control motor turns round in the other direction.
The utlity model has following advantage: owing to adopted specific impedance Control technology that motor is controlled, it is to rely on the three-phase controllable silicon AC voltage regulator directly to regulate the motor rotor equiva lent impedance, realizes the motor stepless time adjustment.Because rotor loop is not connected with electrical network, has realized the Passive Shape Control of rotor, thereby do not exist to electrical network feedback contaminative high order harmonic component problem.Compare with controllable silicon string utmost point speed regulating device, the utility model no longer with parts such as expensive SCR inverter, contravariant transformer and starting diverter switch starting resistances, has the effect of tangible reduction manufacturing cost and simplified structure.Be applicable to the bidirectional speed governing and the soft start of wound type AC motor of the large, medium and small capacity of present extensive use.
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the schematic diagram of new wound-rotor type alternating current motor bidirectional speed governing device
Fig. 2 is the schematic diagram of impedance controller
As seen from the figure, new wound-rotor type alternating current motor bidirectional speed governing device is made up of voltage regulator, reactor, it is characterized in that voltage regulator is a three-phase controllable silicon AC voltage regulator 3, and reactor is the three-phase reactor 1 of same iron core; The input of AC voltage regulator is connected with the output of three-phase reactor, and the output short circuit of AC voltage regulator connects; The input of three-phase reactor is as the incoming end of wound rotor 2 induced potentials of motor; Be connected with the SCR control end of AC voltage regulator by impedance controller 4; The SCR control end 5 of impedance controller and AC voltage regulator, potentiometer 6, reference voltage 7, earth terminal 8 constitute phase-control circuit.
Impedance controller described in the utility model is made up of frequency doubling attenuation device 9, synchronizing indicator 10, bidirectional pulse generator 11, direction controller 12.
Claims (2)
1, a kind of new wound-rotor type alternating current motor bidirectional speed governing device is made up of voltage regulator, reactor, it is characterized in that voltage regulator is the three-phase controllable silicon AC voltage regulator, and reactor is the three-phase reactor of same iron core; The input of AC voltage regulator is connected with the output of three-phase reactor, and the output short circuit of AC voltage regulator connects; The input of three-phase reactor is as the incoming end of the wound-rotor induction gesture of motor; Be connected with the SCR control end of AC voltage regulator by impedance controller; SCR control end, potentiometer, reference voltage, earth terminal by impedance controller and AC voltage regulator constitute phase-control circuit.
2, new wound-rotor type alternating current motor bidirectional speed governing device as claimed in claim 1 is characterized in that impedance controller is made up of frequency doubling attenuation device, synchronizing indicator, bidirectional pulse generator, direction controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93201688 CN2152344Y (en) | 1993-02-04 | 1993-02-04 | Bidirectional speed regulator for winding ac motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93201688 CN2152344Y (en) | 1993-02-04 | 1993-02-04 | Bidirectional speed regulator for winding ac motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2152344Y true CN2152344Y (en) | 1994-01-05 |
Family
ID=33786089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93201688 Expired - Fee Related CN2152344Y (en) | 1993-02-04 | 1993-02-04 | Bidirectional speed regulator for winding ac motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2152344Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882905A (en) * | 2010-06-08 | 2010-11-10 | 上海隧道工程股份有限公司 | Wireless remote soft start electrical cabinet |
-
1993
- 1993-02-04 CN CN 93201688 patent/CN2152344Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882905A (en) * | 2010-06-08 | 2010-11-10 | 上海隧道工程股份有限公司 | Wireless remote soft start electrical cabinet |
| CN101882905B (en) * | 2010-06-08 | 2012-07-18 | 上海隧道工程股份有限公司 | Wireless remote soft start electrical cabinet |
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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 |