GB1186838A - Electric Stepping Motor - Google Patents
Electric Stepping MotorInfo
- Publication number
- GB1186838A GB1186838A GB3155568A GB3155568A GB1186838A GB 1186838 A GB1186838 A GB 1186838A GB 3155568 A GB3155568 A GB 3155568A GB 3155568 A GB3155568 A GB 3155568A GB 1186838 A GB1186838 A GB 1186838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotor
- coil
- degrees
- energization
- magnetic axis
- 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
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Electromechanical Clocks (AREA)
- Displays For Variable Information Using Movable Means (AREA)
Abstract
1,186,838. Electric motors. BOWMAR INSTRUMENT CORP. 2 July, 1968, No. 31555/68. Heading H2A. To enable the permanent magnet -rotor 46 of a stepping motor for displaying digital data to be rotated through 180 degrees by reverse energization of one of a plurality of stator coils 44, the rotor carries a pair of polepieces 64, 66 at opposite ends of a diameter 68 displaced by an angle #, Fig. 7, of between 5 degrees and 25 degrees from the magnetic axis 62 of .the rotor. In the embodiment shown, five coils 44 are provided each spanning five poles of ten-pole stator and therefore on energization of a coil the magnetic axis 62 aligns itself with the centre one of the associated poles. On de-energization of the coil, the permanent magnet flux seeks the lowest reluctance path to the stator and redistributes itself through the polepieces 64, 66 causing the rotor to rotate slightly until they are aligned with said centre pole. The resulting slight displacement of the magnetic axis enables torque to be exerted on the rotor if the said coil is energized in the reverse direction. The rotor carries a drum 28 on which the digital data is arranged for display through a window 26 in a two-part casing 14, 16.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3155568A GB1186838A (en) | 1968-07-02 | 1968-07-02 | Electric Stepping Motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3155568A GB1186838A (en) | 1968-07-02 | 1968-07-02 | Electric Stepping Motor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1186838A true GB1186838A (en) | 1970-04-08 |
Family
ID=10324876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3155568A Expired GB1186838A (en) | 1968-07-02 | 1968-07-02 | Electric Stepping Motor |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1186838A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2940449A1 (en) * | 1978-10-06 | 1980-04-10 | Citroen Sa | ELECTRIC STEPPER MOTOR |
-
1968
- 1968-07-02 GB GB3155568A patent/GB1186838A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2940449A1 (en) * | 1978-10-06 | 1980-04-10 | Citroen Sa | ELECTRIC STEPPER MOTOR |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |