JPS5681072A - Brushless dc motor - Google Patents
Brushless dc motorInfo
- Publication number
- JPS5681072A JPS5681072A JP15855179A JP15855179A JPS5681072A JP S5681072 A JPS5681072 A JP S5681072A JP 15855179 A JP15855179 A JP 15855179A JP 15855179 A JP15855179 A JP 15855179A JP S5681072 A JPS5681072 A JP S5681072A
- Authority
- JP
- Japan
- Prior art keywords
- pole part
- pole
- magnet
- sets
- main
- 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
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/14—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
Abstract
PURPOSE:To reduce numbe of the parts and get a good FG servo characteristic by a method wherein a single magnet is prepared with main pole part, the position detecting pole part and FG pole part and the nonmagnetic pole part of main pole part is so constituted that N-pole and S-pole are made to axially coexist. CONSTITUTION:A rotor 4 of the ferromagnetic material with a circular ring-shaped magnet 5 is fixed to a rotary shaft 1 to be opposinglyplaced to a stator core 6 wound around by the coils 7a 7b. The inner peripheral face of the magnet 5 is furnished with two sets of N-pole part, nonmagnetic pole part and S-pole part by turns to form main pole part (a), the axial end face are furnished with 25 sets of N, S poles with equal pitch intervals to form FG pole part (b) and to constitute a position detecting pole part (c) consisting of the excited two sets [an equal number with main pole (a)] of N-pole, S-pole on the outer peripheral face or on the end surface with equal angular intervals. And a magnet-electroconversion element for sensing a magnetic flux of the FG coil 10, control-drive circuit 12 and a position detection pole part (c) and such are provided on a print substrate 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15855179A JPS5681072A (en) | 1979-12-06 | 1979-12-06 | Brushless dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15855179A JPS5681072A (en) | 1979-12-06 | 1979-12-06 | Brushless dc motor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15426580A Division JPS5681073A (en) | 1980-10-31 | 1980-10-31 | Brushless dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5681072A true JPS5681072A (en) | 1981-07-02 |
Family
ID=15674169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15855179A Pending JPS5681072A (en) | 1979-12-06 | 1979-12-06 | Brushless dc motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5681072A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0120923A1 (en) * | 1982-09-30 | 1984-10-10 | Applied Motion Products, Inc. | An improved magnetic motor tachometer assembly |
| NL8600667A (en) * | 1985-11-08 | 1987-06-01 | Yokogawa Electric Corp | AUTOMATIC BALANCE-TYPE PEN RECORDER WITH A SERVOMECHANISM. |
| JPH0260471U (en) * | 1988-10-24 | 1990-05-02 |
-
1979
- 1979-12-06 JP JP15855179A patent/JPS5681072A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0120923A1 (en) * | 1982-09-30 | 1984-10-10 | Applied Motion Products, Inc. | An improved magnetic motor tachometer assembly |
| NL8600667A (en) * | 1985-11-08 | 1987-06-01 | Yokogawa Electric Corp | AUTOMATIC BALANCE-TYPE PEN RECORDER WITH A SERVOMECHANISM. |
| JPH0260471U (en) * | 1988-10-24 | 1990-05-02 |
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