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JPS57208853A - Direct current brushless motor - Google Patents

Direct current brushless motor

Info

Publication number
JPS57208853A
JPS57208853A JP56092313A JP9231381A JPS57208853A JP S57208853 A JPS57208853 A JP S57208853A JP 56092313 A JP56092313 A JP 56092313A JP 9231381 A JP9231381 A JP 9231381A JP S57208853 A JPS57208853 A JP S57208853A
Authority
JP
Japan
Prior art keywords
phase
magnetic field
starting
revolving magnetic
generated
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
JP56092313A
Other languages
Japanese (ja)
Inventor
Saburo Kazama
Takashi Furuhata
Kenji Sato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56092313A priority Critical patent/JPS57208853A/en
Publication of JPS57208853A publication Critical patent/JPS57208853A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushless Motors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To improve a starting characteristic by generating a revolving magnetic field at fixed speed by a stator when starting and giving starting torque by eddy currents, induced currents, magnetic hysteresis, etc. by the revolving magnetic field. CONSTITUTION:When starting, the three-phase pulses of predetermined frequency are inputted to a six-phase pulse generating circuit 30 through changeover switches 29 from a three-phase pulse generating circuit 28. Six-phase pulses generated at the circuit 30 are further inputted to switching transistors 11-16 at output stages, DC currents are interrupted, a stator coil is conducted and the three-phase revolving magnetic field is generated. Eddy current torque is generated in the conductive material board of the surface of a rotary magnet by the three-phase revolving magnetic field, and a rotor is started and turned. When the number of revolution of the rotor reaches the reference number of revolution or higher, the connection of the changeover switches 29 is changed over to the back electromotive voltage signal system side, and the motor is transferred to rotary operation as the DC brushless motor.
JP56092313A 1981-06-17 1981-06-17 Direct current brushless motor Pending JPS57208853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56092313A JPS57208853A (en) 1981-06-17 1981-06-17 Direct current brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56092313A JPS57208853A (en) 1981-06-17 1981-06-17 Direct current brushless motor

Publications (1)

Publication Number Publication Date
JPS57208853A true JPS57208853A (en) 1982-12-22

Family

ID=14050902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56092313A Pending JPS57208853A (en) 1981-06-17 1981-06-17 Direct current brushless motor

Country Status (1)

Country Link
JP (1) JPS57208853A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6166586A (en) * 1984-09-07 1986-04-05 Victor Co Of Japan Ltd Motor drive circuit
JPS61135378A (en) * 1984-12-04 1986-06-23 Matsushita Electric Ind Co Ltd Brushless motor drive device
JPS61135383A (en) * 1984-12-04 1986-06-23 Matsushita Electric Ind Co Ltd Brushless motor drive device
JPS61147790A (en) * 1984-12-18 1986-07-05 Victor Co Of Japan Ltd Motor drive circuit
JPS61180594A (en) * 1984-12-19 1986-08-13 Victor Co Of Japan Ltd Motor drive circuit
JPS61244291A (en) * 1985-04-22 1986-10-30 Matsushita Electric Ind Co Ltd Brushless motor drive device
CN102480197A (en) * 2010-11-26 2012-05-30 日立空调·家用电器株式会社 Self-starting type axial gap synchronous motor, compressor and refrigeration cycle apparatus using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311015A (en) * 1976-07-17 1978-02-01 Teac Corp Signal level indicator
JPS5526030A (en) * 1978-08-14 1980-02-25 Hitachi Ltd Flat armature coil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311015A (en) * 1976-07-17 1978-02-01 Teac Corp Signal level indicator
JPS5526030A (en) * 1978-08-14 1980-02-25 Hitachi Ltd Flat armature coil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6166586A (en) * 1984-09-07 1986-04-05 Victor Co Of Japan Ltd Motor drive circuit
JPS61135378A (en) * 1984-12-04 1986-06-23 Matsushita Electric Ind Co Ltd Brushless motor drive device
JPS61135383A (en) * 1984-12-04 1986-06-23 Matsushita Electric Ind Co Ltd Brushless motor drive device
JPS61147790A (en) * 1984-12-18 1986-07-05 Victor Co Of Japan Ltd Motor drive circuit
JPS61180594A (en) * 1984-12-19 1986-08-13 Victor Co Of Japan Ltd Motor drive circuit
JPS61244291A (en) * 1985-04-22 1986-10-30 Matsushita Electric Ind Co Ltd Brushless motor drive device
CN102480197A (en) * 2010-11-26 2012-05-30 日立空调·家用电器株式会社 Self-starting type axial gap synchronous motor, compressor and refrigeration cycle apparatus using the same

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