GB1020643A - A.c. electric motor - Google Patents
A.c. electric motorInfo
- Publication number
- GB1020643A GB1020643A GB2879963A GB2879963A GB1020643A GB 1020643 A GB1020643 A GB 1020643A GB 2879963 A GB2879963 A GB 2879963A GB 2879963 A GB2879963 A GB 2879963A GB 1020643 A GB1020643 A GB 1020643A
- Authority
- GB
- United Kingdom
- Prior art keywords
- auxiliary
- rotor
- control
- auxiliary stator
- motor
- 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
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/30—Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
1,020,643. Induction motors. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 19, 1964 [July 19, 1963], No. 28799/63. Heading H2A. In a wound-rotor induction motor, the use of slip-rings is avoided by connecting a resistor R permanently across each rotor coil 8, and S.C.R.'s or thyratrons D 1 , D 2 which may be rendered conducting to short-circuit the resistor when a trigger voltage is generated in windings 9, 10 on an auxiliary rotor. Variable excitation of the auxiliary stator thus acts to control the motor speed. The auxiliary generator produces high-frequency current, e.g. from short-pitched coils as shown in Fig. 2, currentlimiting resistors r and reverse-current-stopping diodes d being connected in series with them. The auxiliary stator may be of high pole number and its field have opposite rotation to the main machine. Full-wave operation of the auxiliary windings 9, 10 may be achieved by using full-wave or polyphase rectifiers at d, and the trigger-pulse may be lengthened by inductance. Two auxiliary machines may be used to provide alternative values of resistance. Speed control may be achieved by tachometric control of the on/off time of the auxiliary stator energization. The machine may operate as a single-phase repulsion motor by limiting the auxiliary stator winding to arcuate sections only.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2879963A GB1020643A (en) | 1963-07-19 | 1963-07-19 | A.c. electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2879963A GB1020643A (en) | 1963-07-19 | 1963-07-19 | A.c. electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1020643A true GB1020643A (en) | 1966-02-23 |
Family
ID=10281367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2879963A Expired GB1020643A (en) | 1963-07-19 | 1963-07-19 | A.c. electric motor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1020643A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500826A (en) * | 1983-06-14 | 1985-02-19 | Espinosa Fausto L | Variable speed electric induction motors without brushes |
| US4736147A (en) * | 1985-04-01 | 1988-04-05 | Huazhong Institute Of Technology | Method of starting motors by harmonics and electrical motors started by this method |
-
1963
- 1963-07-19 GB GB2879963A patent/GB1020643A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500826A (en) * | 1983-06-14 | 1985-02-19 | Espinosa Fausto L | Variable speed electric induction motors without brushes |
| US4736147A (en) * | 1985-04-01 | 1988-04-05 | Huazhong Institute Of Technology | Method of starting motors by harmonics and electrical motors started by this method |
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