CN2390356Y - Non-contact rheostatic starting device - Google Patents
Non-contact rheostatic starting device Download PDFInfo
- Publication number
- CN2390356Y CN2390356Y CN 99245106 CN99245106U CN2390356Y CN 2390356 Y CN2390356 Y CN 2390356Y CN 99245106 CN99245106 CN 99245106 CN 99245106 U CN99245106 U CN 99245106U CN 2390356 Y CN2390356 Y CN 2390356Y
- Authority
- CN
- China
- Prior art keywords
- motor
- rectification bridge
- transistor
- phase
- wave rectification
- 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)
- Motor And Converter Starters (AREA)
Abstract
The utility model relates to a non contacting point resistance changing starting apparatus for a line winding motor and is characterized in that the direct current side of a three-phase full-wave rectification bridge is connected with a transistor in series through an electric reacting device connected with a freewheeling diode in parallel to form a still wave chopping device. After the alternate current side of the rectification bridge is connected in parallel with a three-phase equilibrium resistance, the alternate current side of the rectification bridge is connected with the rotor return circuit of the motor. A current transformer, a single chip computer and a driving integrated circuit are connected in series to form a computer controlling return circuit connected with the controlling pole of the transistor. The non contacting point resistance changing starting apparatus for a line winding motor can cause the starting torque of the motor to be enlarged and have no impact. The starting process is stable, and the starting current is small and constant. The non contacting point resistance changing starting apparatus for a line winding motor has no impact on an electric network and is suitable for the heavy load frequency starting process or speed regulation.
Description
The utility model relates to a kind of transmission device of Wound-rotor type AC asynchronous motor, belongs to electromechanical integration technology area.
As everyone knows, mechanical motor transmission great majority such as driving, elevator are to adopt multistage metallic resistance to be connected to rotor loop, excise resistance mode control electric motor starting step by step by contactor or cam controller, when adopting this mode to start, the electric motor starting electric current is big and impact is frequent, and electrical contact acts frequently and easily burns, in addition, there is level starting to make mechanical shock also very serious, to harmful effect is arranged in useful life of plant equipment.
The purpose of this utility model is by a kind of contactless and can smoothly adjust the device control motor smooth starting of rotor loop resistance size, make the electric motor starting electric current little and constant, do not have and impact.
Technical solution of the present utility model is: contactless variable-resistance started device is formed three phase full wave rectification bridge D by the resistor group of three-phase equilibrium, normal termination resistor group, static chopper and computer control loop
1-6DC side by and the reactor and the transistor T of fly-wheel diode arranged
1Series connection constitutes static chopper, the AC side of three-phase full wave rectifier circuit with after the resistor group of three-phase equilibrium is in parallel by normal termination resistor group access or directly insert the motor rotor loop; The computer control loop is formed in motor stator currents instrument transformer and monolithic computer loop and pulsed drive loop, and output end of driver connects transistor T
1The control utmost point.
Transistor T in the technique scheme
1Be field-effect transistor IGBT or transistor GTR.
Three-phase equilibrium resistor in the technique scheme adopts star to connect or triangle connects.
Three phase full wave rectification bridge in the technique scheme is the three phase full wave rectification bridge module, or six discrete diode rectifier bridges.
The working method of contactless variable-resistance started device of the present utility model is such: the computer control loop receive main make signal and motor stator current signal after, send the copped wave control signal automatically, oxide-semiconductor control transistors T
1According to different make-to-break ratio turn-on and turn-off, when make-to-break ratio progressively increases by zero, make the equivalent resistance in rotor loop progressively change to minimum, thereby realize the smooth starting of motor by maximum.
Contactless variable-resistance started device of the present utility model, its advantage are to have adopted transistor to replace electric contact, and system reliability improves greatly; The electric motor starting torque is big and do not have impact, and starting steadily; The electric motor starting electric current is little and constant, and electrical network is not had impact.The utility model has obviously improved the starting performance of motor, is applicable to the Fraquent start or the speed governing of heavy load motor.
Accompanying drawing is an electrical schematic diagram of the present utility model.
Below in conjunction with accompanying drawing this practicality newly is described in further detail:
The utility model is by three-phase equilibrium resistor 2R
1-3, normal termination resistor 1R
1-3, static chopper and computer control loop three parts are formed; Static chopper comprises by six diode D
1-6The three phase full wave rectification bridge that constitutes, direct current reactor L, sustained diode
7And transistor T
1The computer control loop comprises motor stator currents instrument transformer TA, single-chip microcomputer IC
1With pulse driver IC
2Three phase full wave rectification bridge D
1-6DC side and reactor L and transistor T
1Series connection, reactor L is parallel with sustained diode
7, three phase full wave rectification bridge D
1-6Also can be the three phase full wave rectification module, also can be six discrete diode rectifier bridges, transistor T
1Be semiconductor transistor GTR or field-effect transistor IGBT; Three phase full wave rectification bridge D
1-6AC side and three-phase equilibrium resistor 2R
1-3Connect the rotor loop of motor M after the parallel connection, also can pass through resistor 1R
1-3Connect the rotor loop of motor M; Three-phase equilibrium resistor 2R
1-3Be metallic resistance, can adopt star to connect, also can adopt triangle to connect; The stator coil of motor is arbitrary pass current transformer TA mutually after, insert power line, the secondary coil of current transformer TA and single-chip microcomputer IC
1, drive integrated circult IC
2Coupled in series, drive integrated circult IC
2Output and semiconductor transistor or field-effect transistor T
1The control utmost point link.
Claims (5)
1, the contactless variable-resistance started device of a kind of wound-rotor motor is characterized in that three phase full wave rectification bridge D
1-6DC side by and sustained diode arranged
7Reactor L and transistor T
1Series connection constitutes static chopper; Three phase full wave rectification bridge D
1-6AC side and three-phase equilibrium resistor 2R
1-3Motor M rotor loop is inserted in back in parallel; Motor stator currents instrument transformer TA and single-chip microcomputer IC
1And drive integrated circult IC
2Be composed in series the computer control loop and connect transistor T
1The control utmost point.
2, contactless variable-resistance started device as claimed in claim 1 is characterized in that said transistor T
1Be semiconductor transistor GTR or field-effect transistor IGBT.
3, contactless variable-resistance started device as claimed in claim 1 is characterized in that said three-phase equilibrium resistor 2R
1-3Adopt star to connect or the triangle connection.
4, contactless variable-resistance started device as claimed in claim 1 is characterized in that said three phase full wave rectification bridge D
1-6With three-phase equilibrium resistor 2R
1-3Parallel connection again with the normal termination resistor 1R of three-phase
1-3Connect motor M rotor loop after the series connection.
5, contactless variable-resistance started device as claimed in claim 1 is characterized in that said three phase full wave rectification bridge D
1-6Be the three phase full wave rectification bridge module, or six discrete diode rectifier bridges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99245106 CN2390356Y (en) | 1999-10-14 | 1999-10-14 | Non-contact rheostatic starting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99245106 CN2390356Y (en) | 1999-10-14 | 1999-10-14 | Non-contact rheostatic starting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2390356Y true CN2390356Y (en) | 2000-08-02 |
Family
ID=34031077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99245106 Expired - Fee Related CN2390356Y (en) | 1999-10-14 | 1999-10-14 | Non-contact rheostatic starting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2390356Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170264A (en) * | 2011-04-15 | 2011-08-31 | 苏州新广济工贸有限公司 | Novel crane wound motor rotor chopping speed regulation system and method |
| CN104022691A (en) * | 2013-11-30 | 2014-09-03 | 广西鱼峰集团水泥有限公司 | Liquid resistor starting device |
| CN104656603A (en) * | 2014-01-13 | 2015-05-27 | 湖北新百特自动化设备股份有限公司 | Solid-state starting and speed regulation device with closed loop control function for wound-rotor motor |
| CN105915120A (en) * | 2016-06-30 | 2016-08-31 | 苏州英威腾电力电子有限公司 | Buffer control circuit and buffer control method of motor device |
-
1999
- 1999-10-14 CN CN 99245106 patent/CN2390356Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170264A (en) * | 2011-04-15 | 2011-08-31 | 苏州新广济工贸有限公司 | Novel crane wound motor rotor chopping speed regulation system and method |
| CN104022691A (en) * | 2013-11-30 | 2014-09-03 | 广西鱼峰集团水泥有限公司 | Liquid resistor starting device |
| CN104656603A (en) * | 2014-01-13 | 2015-05-27 | 湖北新百特自动化设备股份有限公司 | Solid-state starting and speed regulation device with closed loop control function for wound-rotor motor |
| CN105915120A (en) * | 2016-06-30 | 2016-08-31 | 苏州英威腾电力电子有限公司 | Buffer control circuit and buffer control method of motor device |
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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 |