JPS55111657A - Brushless motor - Google Patents

Brushless motor

Info

Publication number
JPS55111657A
JPS55111657A JP1737679A JP1737679A JPS55111657A JP S55111657 A JPS55111657 A JP S55111657A JP 1737679 A JP1737679 A JP 1737679A JP 1737679 A JP1737679 A JP 1737679A JP S55111657 A JPS55111657 A JP S55111657A
Authority
JP
Japan
Prior art keywords
transistors
current flows
collector
turned
circuit
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
Application number
JP1737679A
Other languages
Japanese (ja)
Inventor
Hiroshi Mizuguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1737679A priority Critical patent/JPS55111657A/en
Publication of JPS55111657A publication Critical patent/JPS55111657A/en
Pending legal-status Critical Current

Links

Landscapes

  • Brushless Motors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE: To simplify the motor structure and to ease its construction by detecting the location and speed of the rotation of the rotor magnet by means of a photoelement, which is placed on the same plane, by utilizing the reflection and absorption of light.
CONSTITUTION: When no reflected ray is applied to the phototransistor PTr 13, high voltage is developed at the collector, current flows between the base and the emitter of the transistors Tr22, 23, the transistors 22, 23, 26 of the ones that make up the first driving circuit 101 are turned on, current flows in the stator coils 10a, 10b in the forward direction. When the voltage at the collector of PTr 13 becomes lower, the transistors 22, 23, 26 are turned off, current flows in the coils 10a, 10b in the reverse direction. Operations of the second driven circuit 102 and the stator coils 10c, 10d which are operated by an output signal from the PTr15 are the same as those of said circuit, the rotor magnet continues its rotation in a fixed direction. In this way, the motor structure can be simplified and its construction can be eased.
COPYRIGHT: (C)1980,JPO&Japio
JP1737679A 1979-02-16 1979-02-16 Brushless motor Pending JPS55111657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1737679A JPS55111657A (en) 1979-02-16 1979-02-16 Brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1737679A JPS55111657A (en) 1979-02-16 1979-02-16 Brushless motor

Publications (1)

Publication Number Publication Date
JPS55111657A true JPS55111657A (en) 1980-08-28

Family

ID=11942283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1737679A Pending JPS55111657A (en) 1979-02-16 1979-02-16 Brushless motor

Country Status (1)

Country Link
JP (1) JPS55111657A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63202259A (en) * 1987-02-13 1988-08-22 Sony Corp Brushless motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016019A (en) * 1973-06-20 1975-02-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016019A (en) * 1973-06-20 1975-02-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63202259A (en) * 1987-02-13 1988-08-22 Sony Corp Brushless motor

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