CH642513GA3 - - Google Patents
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- Publication number
- CH642513GA3 CH642513GA3 CH611081A CH611081A CH642513GA3 CH 642513G A3 CH642513G A3 CH 642513GA3 CH 611081 A CH611081 A CH 611081A CH 611081 A CH611081 A CH 611081A CH 642513G A3 CH642513G A3 CH 642513GA3
- Authority
- CH
- Switzerland
- Prior art keywords
- rotor
- rotation
- coil
- switching cycle
- circuit
- Prior art date
Links
- 230000002441 reversible effect Effects 0.000 abstract 3
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
-
- 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
- H02P8/00—Arrangements for controlling dynamo-electric motors rotating step by step
- H02P8/02—Arrangements for controlling dynamo-electric motors rotating step by step specially adapted for single-phase or bi-pole stepper motors, e.g. watch-motors, clock-motors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Stepping Motors (AREA)
Abstract
An improved electrical drive circuit for a reversible electric stepping motor of the type having a coil supplied with electrical pulses to cause step-by-step rotation of a magnetized rotor, where the rotor includes additional magnetic poles for locking the rotor between steps in a stable equilibrium located so as to reduce the energy of pulses required to produce normal forward rotation of the rotor. Forward rotation is produced by a switching circuit which periodically connects a voltage source and energy dissipating means in circuit with the coil for pre-determined time intervals in a forward switching cycle. The reverse rotation switching cycle includes one or more pulse portions in the forward rotation to pre-position the rotor for reversal. Preparatory to reversal, the reverse switching cycle applied to the motor coil includes a train of high frequency pulses which reduce the electromagnetic torque in the forward rotational direction and control coil current.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/190,157 US4375049A (en) | 1980-09-24 | 1980-09-24 | Stepping motor drive circuit for bi-directional rotation |
Publications (2)
Publication Number | Publication Date |
---|---|
CH642513B CH642513B (en) | |
CH642513GA3 true CH642513GA3 (en) | 1984-04-30 |
Family
ID=22700232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH611081A CH642513B (en) | 1980-09-24 | 1981-09-22 | ELECTRIC DRIVER CIRCUIT FOR A CONTROLLABLE STEPPER MOTOR. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4375049A (en) |
JP (1) | JPS5785600A (en) |
CH (1) | CH642513B (en) |
FR (1) | FR2490894B1 (en) |
GB (1) | GB2084819B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4423366A (en) * | 1981-08-13 | 1983-12-27 | Xerox Corporation | Motor drive |
DE3360937D1 (en) * | 1982-01-28 | 1985-11-14 | Asulab Sa | Stepping motor with two directions of rotation, in particular for electronic time pieces, and motor unit comprising the same |
US4553080A (en) * | 1983-07-25 | 1985-11-12 | Allen-Bradley Company | Position transducer |
CA1239439A (en) * | 1984-03-19 | 1988-07-19 | William E. Schmitz | Multiple phase stepper motor torque control apparatus and method |
US4601195A (en) * | 1985-04-11 | 1986-07-22 | Rheometrics, Inc. | Apparatus and method for measuring viscoelastic properties of materials |
US4912692A (en) * | 1988-09-29 | 1990-03-27 | Timex Corporation | High rate, bidirectional drive for a bipole stepping motor watch |
JPH04312400A (en) * | 1991-04-09 | 1992-11-04 | Seikosha Co Ltd | Reverse drive method for stepping motor |
US5424625A (en) * | 1993-03-26 | 1995-06-13 | Haner; Lambert | Repulsion motor |
US6049187A (en) * | 1993-03-26 | 2000-04-11 | Dynamotors, Inc. | Speed control for brushless repulsion motor |
US6016044A (en) * | 1995-09-11 | 2000-01-18 | Alaris Medical Systems, Inc. | Open-loop step motor control system |
FR2755550B1 (en) * | 1996-11-06 | 1999-01-22 | Magneti Marelli France | METHOD FOR THE REVERSE DIRECTION OF A STEPPER ELECTRIC MOTOR, IN PARTICULAR OF A DASHBOARD NEEDLE WATCH |
EP2141559B1 (en) * | 2008-07-01 | 2011-12-07 | EM Microelectronic-Marin SA | Timepiece fitted with a control case for an electric motor |
JP7066361B2 (en) * | 2017-09-21 | 2022-05-13 | セイコーインスツル株式会社 | Clocks, electronic devices, and how to control clocks |
EP3663872B1 (en) * | 2018-12-06 | 2022-06-08 | The Swatch Group Research and Development Ltd | Control method of a direct current electric motor |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH1372372A4 (en) * | 1972-09-20 | 1976-09-15 | ||
JPS5280063A (en) * | 1975-12-26 | 1977-07-05 | Citizen Watch Co Ltd | Reversible pulse motor system and watch |
US4055785A (en) * | 1976-01-12 | 1977-10-25 | Fumio Nakajima | Stepping motor for electronic timepiece |
JPS52156323A (en) * | 1976-06-22 | 1977-12-26 | Citizen Watch Co Ltd | Driver circuit for pulse motor |
JPS5370876A (en) * | 1976-12-07 | 1978-06-23 | Seiko Instr & Electronics Ltd | Electronic wristwatch |
GB2064834B (en) * | 1977-09-26 | 1982-12-08 | Citizen Watch Co Ltd | Drive system for stepping motor in a timepiece |
FR2450527A1 (en) * | 1979-03-01 | 1980-09-26 | Suisse Horlogerie | NON REVERSIBLE STEPPER MOTOR |
-
1980
- 1980-09-24 US US06/190,157 patent/US4375049A/en not_active Expired - Lifetime
-
1981
- 1981-09-16 GB GB8128008A patent/GB2084819B/en not_active Expired
- 1981-09-22 CH CH611081A patent/CH642513B/en unknown
- 1981-09-24 FR FR8118010A patent/FR2490894B1/en not_active Expired
- 1981-09-24 JP JP56151337A patent/JPS5785600A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2084819A (en) | 1982-04-15 |
FR2490894A1 (en) | 1982-03-26 |
CH642513B (en) | |
FR2490894B1 (en) | 1985-06-07 |
JPS5785600A (en) | 1982-05-28 |
GB2084819B (en) | 1984-03-14 |
US4375049A (en) | 1983-02-22 |
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