JPS56145770A - Linear motor - Google Patents
Linear motorInfo
- Publication number
- JPS56145770A JPS56145770A JP4568480A JP4568480A JPS56145770A JP S56145770 A JPS56145770 A JP S56145770A JP 4568480 A JP4568480 A JP 4568480A JP 4568480 A JP4568480 A JP 4568480A JP S56145770 A JPS56145770 A JP S56145770A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- central part
- reduced
- linear motor
- magnetic flux
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
- H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
Abstract
PURPOSE:To reduce the weight and the cost of a linear motor without varying the rotating characteristics of the motor having a movable coil and a stationary permanent magnet by reducing the quantity of magnetic flux intersecting the coil at the intermediate part of a running path as compared with those at both ends. CONSTITUTION:In a linear motor in which a stator 1 is formed of a plurality of yokes 2A, 2B and a permanent magnet 3 fixed thereto and a rotor 4 is formed of bobbin 5 on which an excitation coil 6 is wound, the width L2 of the central part 9 of the permanent magnet 3 is reduced then the widths L1 of both the ends 7, 8 in such a manner that the quantity of magnetic flux intersecting the excitation coil 6 is reduced as compared with that at the central part. A slit may be formed at the central part instead of reducing the width of the central part 9 of the permanent magnet 3. Since the quantity of the magnetic flux of the permanent magnet at the central part which does not affect the running characteristics can be thus reduced, the weight and the cost of the motor can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4568480A JPS56145770A (en) | 1980-04-09 | 1980-04-09 | Linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4568480A JPS56145770A (en) | 1980-04-09 | 1980-04-09 | Linear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56145770A true JPS56145770A (en) | 1981-11-12 |
Family
ID=12726214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4568480A Pending JPS56145770A (en) | 1980-04-09 | 1980-04-09 | Linear motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56145770A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451773A2 (en) * | 1990-04-09 | 1991-10-16 | Nippon Conlux Co., Ltd. | Linear motor |
| US5195739A (en) * | 1991-02-01 | 1993-03-23 | Nippon Conlux Co., Ltd. | Apparatus for preventing bills or the like from being pulled out |
| WO2017208877A1 (en) * | 2016-06-03 | 2017-12-07 | 富士フイルム株式会社 | Voice coil motor, lens moving device, and imaging device |
-
1980
- 1980-04-09 JP JP4568480A patent/JPS56145770A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451773A2 (en) * | 1990-04-09 | 1991-10-16 | Nippon Conlux Co., Ltd. | Linear motor |
| US5341053A (en) * | 1990-04-09 | 1994-08-23 | Nippon Conlux Co., Ltd. | Linear motor with permanent magnets |
| US5195739A (en) * | 1991-02-01 | 1993-03-23 | Nippon Conlux Co., Ltd. | Apparatus for preventing bills or the like from being pulled out |
| WO2017208877A1 (en) * | 2016-06-03 | 2017-12-07 | 富士フイルム株式会社 | Voice coil motor, lens moving device, and imaging device |
| JPWO2017208877A1 (en) * | 2016-06-03 | 2019-02-07 | 富士フイルム株式会社 | Voice coil motor, lens moving device, and imaging device |
| US10819207B2 (en) | 2016-06-03 | 2020-10-27 | Fujifilm Corporation | Voice coil motor and lens moving device |
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