JPS5678367A - Brushless motor - Google Patents

Brushless motor

Info

Publication number
JPS5678367A
JPS5678367A JP15183879A JP15183879A JPS5678367A JP S5678367 A JPS5678367 A JP S5678367A JP 15183879 A JP15183879 A JP 15183879A JP 15183879 A JP15183879 A JP 15183879A JP S5678367 A JPS5678367 A JP S5678367A
Authority
JP
Japan
Prior art keywords
stator
pole
torque
tau2
tau1
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
JP15183879A
Other languages
Japanese (ja)
Inventor
Ryohei Uchida
Kenji Kawagishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15183879A priority Critical patent/JPS5678367A/en
Publication of JPS5678367A publication Critical patent/JPS5678367A/en
Pending legal-status Critical Current

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
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushless Motors (AREA)

Abstract

PURPOSE:To reduce torque ripples and to eliminate the dead point of the torque by shfiting the peak point of the field flux from the center of a pole, and driving a plurality of stator windings by two-phase waves. CONSTITUTION:A rotary shaft 1 can be freely rotated in a stator frame 11 via bearings 10. The shaft 1 is installed to a rotor field magnet 8 formed by a permanent magnet via a deformed ring 7 acomrising a soft magnetic material. While a stator 6 is formed with the soft magnetic material. One slot is formed for one pole. The width m1 of the teeth of the stator 6 is shorter than the pole pitch so as to obtain the specified short-pitch factor for the stator windings 2-5. The path of the magnetic flux in the section between the pitches tau1-tau0 in the rotor field magnet 8 is thin, and becomes thicker toward tau2 in the other section between tau2-tau1. Therefore, the deformed ring 7 is formed by cutting a circular cylinder having a radius m3 in the axial direction as shown by the length of a chord m2. Thus, the dead point of the torque can be eliminated.
JP15183879A 1979-11-22 1979-11-22 Brushless motor Pending JPS5678367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15183879A JPS5678367A (en) 1979-11-22 1979-11-22 Brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15183879A JPS5678367A (en) 1979-11-22 1979-11-22 Brushless motor

Publications (1)

Publication Number Publication Date
JPS5678367A true JPS5678367A (en) 1981-06-27

Family

ID=15527395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15183879A Pending JPS5678367A (en) 1979-11-22 1979-11-22 Brushless motor

Country Status (1)

Country Link
JP (1) JPS5678367A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62285653A (en) * 1986-05-27 1987-12-11 Nippon Densan Kk Brushless motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62285653A (en) * 1986-05-27 1987-12-11 Nippon Densan Kk Brushless motor

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