GB1339500A - Electrical circuit arrangement for a drive by means of 3-phase squirrel-cage motors - Google Patents
Electrical circuit arrangement for a drive by means of 3-phase squirrel-cage motorsInfo
- Publication number
- GB1339500A GB1339500A GB1339500DA GB1339500A GB 1339500 A GB1339500 A GB 1339500A GB 1339500D A GB1339500D A GB 1339500DA GB 1339500 A GB1339500 A GB 1339500A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drive
- speed
- motor
- star
- switching
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
- H02P5/747—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors mechanically coupled by gearing
Abstract
1339500 Control of two AC motors WERKZEUGMASCHINENKOMBINAT "7 OKTOBER" BERLIN VEB 7 April 1971 8966/71 Heading H2J A control circuit for a two speed drive, e.g. for driving a grinding and dressing wheel, comprises two three-phase squirrel cage motors, arranged for star-delta switching, which are coupled together mechanically with a transmission ratio different from 1, the non-driving motor at each speed running idle. The main motor 1 is used to accelerate the drive from rest up to a constant high speed. The auxiliary motor 2 is used to power the drive at a constant low speed, to oversynchronously brake the drive from the high speed to the low speed in star-connection, and, if the system is switched off, to brake the drive to rest from the high speed using reverse current braking. The switching of the various modes of operation is accomplished using a circuit employing relays (Fig. 2, not shown). Interlocking circuits are provided so that the main motor can only be switched on manually if the drive is stationary and so that the auxiliary motor can only become effective when the main motor is running in delta connection. The switching of each motor from star to delta connection may be effected using time-delay relays or revolution counting instruments which switch the connections when a constant speed has been reached.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB896671 | 1971-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1339500A true GB1339500A (en) | 1973-12-05 |
Family
ID=9862745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1339500D Expired GB1339500A (en) | 1971-04-07 | 1971-04-07 | Electrical circuit arrangement for a drive by means of 3-phase squirrel-cage motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1339500A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236808A (en) * | 2013-05-20 | 2013-08-07 | 江苏凯隆电器有限公司 | Voltage reduction start protector for motor |
| CN104052339A (en) * | 2014-07-03 | 2014-09-17 | 溧阳市科华机械制造有限公司 | Electrical control loop and control method of motor of dehydrator |
-
1971
- 1971-04-07 GB GB1339500D patent/GB1339500A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236808A (en) * | 2013-05-20 | 2013-08-07 | 江苏凯隆电器有限公司 | Voltage reduction start protector for motor |
| CN103236808B (en) * | 2013-05-20 | 2016-07-06 | 江苏凯隆电器有限公司 | Voltage reduction start protector for motor |
| CN104052339A (en) * | 2014-07-03 | 2014-09-17 | 溧阳市科华机械制造有限公司 | Electrical control loop and control method of motor of dehydrator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |