CN2251834Y - AC-ac frequency changing starter for ac motor - Google Patents
AC-ac frequency changing starter for ac motor Download PDFInfo
- Publication number
- CN2251834Y CN2251834Y CN 95204837 CN95204837U CN2251834Y CN 2251834 Y CN2251834 Y CN 2251834Y CN 95204837 CN95204837 CN 95204837 CN 95204837 U CN95204837 U CN 95204837U CN 2251834 Y CN2251834 Y CN 2251834Y
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- China
- Prior art keywords
- frequency
- motor
- alternating current
- model
- utility
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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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- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to an AC-AC frequency changing starter for an AC motor. The utility model is composed of an AC-AC frequency changer and a computer frequency controller. The utility model is characterized in that the AC-AC frequency changer is composed of six pieces of controlled silicon in antiparallel connection or three pieces of bidirectional controlled silicon; an input end of the frequency changer is connected with an electric network, and an output end is connected with the AC motor; a control end of the controlled silicon is connected with a microcomputer frequency controller, and a control circuit is formed. The starter controls the AC motor to operate at a rotary speed which is below or equal to an industrial frequency through a low frequency signal or an industrial frequency signal emitted by the microcomputer frequency controller, and purposes that the low-frequency starting of the AC motor has no impact for the electric network and mechanical equipment and electric energy is saved can be realized. The utility model is suitable for occasions of frequent starting of the AC motor.
Description
The utility model belongs to motor starter, particularly by the power frequency supply Direct Conversion is realized the device that alternating current motor starts.
In existing alternating current motor starting drive, all adopt the phased reduced-voltage starting of controllable silicon, but detent torque is little, generally can only reach about 10% of alternating current motor nominal torque, impulse current is big, can reach 2-4 times of the alternating current motor rated current, and can not heavy load starting.
The objective of the invention is to design a kind of novel alternating current motor AC-AC frequency conversion starting drive,, control by the microcomputer frequency controller by silicon controlled inverse parallel or employing bidirectional triode thyristor circuit, it is big to make it reach down staring torque, electric current is little, and electrical network is not had impact, and energy consumption is low.
Alternating current motor AC-AC frequency conversion starting drive of the present utility model, form by ac-ac frequency converter, computer frequency controller, the computer frequency controller constitutes the frequency controller circuit by synchronizing indicator, single-chip microcomputer, pulse driver, it is characterized in that: ac-ac frequency converter is made up of six controllable silicon inverse parallels or three bidirectional triode thyristors, the input of ac-ac frequency converter connects with electrical network, and the output and the alternating current motor of ac-ac frequency converter connect; Ac-ac frequency converter silicon controlled control end connects with the microcomputer frequency controller.
Occupation mode of the present utility model is, automatically send frequency change control signal by the microcomputer frequency controller, trigger order by changing the ac-ac frequency converter silicon controlled, directly the common frequency power network frequency conversion is become low-frequency power, be added on the alternating current motor, after treating that the permanent torque of motor starts, enter the common frequency power network operation automatically.
Alternating current motor AC-AC frequency conversion starting drive of the present utility model, its advantage is, owing in device, adopted friendship-friendship Direct Conversion technology, motor is carried out start-up control, it is to rely on six controllable silicon inverse parallels or three bidirectional triode thyristors to constitute ac-ac frequency converter, staring torque is big, can reach motor nominal torque 1-2 doubly, starting current is little, and electrical network is not had impact, the rated current that is lower than motor starts, and has realized the alternating current motor start-up course of low-loss, big torque.Compare to the control starter with controllable silicon, the utlity model has the obvious impact that improves the motor start-up process to electrical network, be applicable to heavy duty motor start-up process.
Below in conjunction with drawings and Examples alternating current motor AC-AC frequency conversion starting drive is described further.
Fig. 1 is an alternating current motor AC-AC frequency conversion starting drive schematic diagram
Fig. 2 is the schematic diagram of microcomputer frequency controller
As can be seen, a kind of alternating current motor AC-AC frequency conversion starting drive, form by ac-ac frequency converter 2, computer frequency controller 5, computer frequency controller 5 constitutes the frequency controller circuit by synchronizing indicator 6, single-chip microcomputer 7, pulse driver 8, its connecting mode is a series connection, it is characterized in that: ac-ac frequency converter 2 is made up of six controllable silicon inverse parallels, and the input 1 of ac-ac frequency converter connects with electrical network, and the output of ac-ac frequency converter and alternating current motor 3 connect; Ac-ac frequency converter silicon controlled control end 4 connects with microcomputer frequency controller 5.
Wherein: single-chip microcomputer is U.S. Intel Corp. 51 series,
Pulse driver is the GH480 of Sweden, German ABB AB,
Synchronizing indicator is the AE6004 of Sweden, German ABB AB.
Claims (2)
1, a kind of alternating current motor AC-AC frequency conversion starting drive, form by ac-ac frequency converter, computer frequency controller, the computer frequency controller constitutes the frequency controller circuit by synchronizing indicator, single-chip microcomputer, pulse driver, it is characterized in that: ac-ac frequency converter is made up of six controllable silicon inverse parallels, the input of ac-ac frequency converter connects with electrical network, and the output and the alternating current motor of ac-ac frequency converter connect; Ac-ac frequency converter silicon controlled control end connects with the microcomputer frequency controller.
2, as claim 1 described alternating current motor AC-AC frequency conversion starting drive, it is characterized in that described six controllable silicons are three bidirectional triode thyristors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95204837 CN2251834Y (en) | 1995-03-15 | 1995-03-15 | AC-ac frequency changing starter for ac motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95204837 CN2251834Y (en) | 1995-03-15 | 1995-03-15 | AC-ac frequency changing starter for ac motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2251834Y true CN2251834Y (en) | 1997-04-09 |
Family
ID=33857230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95204837 Expired - Fee Related CN2251834Y (en) | 1995-03-15 | 1995-03-15 | AC-ac frequency changing starter for ac motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2251834Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199768A (en) * | 2013-04-15 | 2013-07-10 | 刘宁 | Alternating current asynchronous motor stepped variable frequency starting method and controller |
| CN108923719A (en) * | 2018-07-06 | 2018-11-30 | 大连科工电子设备有限公司 | Double frequency electrical machinery controller |
-
1995
- 1995-03-15 CN CN 95204837 patent/CN2251834Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199768A (en) * | 2013-04-15 | 2013-07-10 | 刘宁 | Alternating current asynchronous motor stepped variable frequency starting method and controller |
| CN108923719A (en) * | 2018-07-06 | 2018-11-30 | 大连科工电子设备有限公司 | Double frequency electrical machinery controller |
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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 |