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Title:
THREE-PHASE BRUSHLESS DC MOTOR AND DRIVING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2019041429
Kind Code:
A
Abstract:
To provide a DC motor capable of achieving reduction in size and weight of it without providing pole detection means at a tacho generator side.SOLUTION: A three-phase brushless DC motor according to the invention and a driving method thereof are so constructed that first to third pole position signals (S1A, S2A, S3A) of the three-phase brushless DC motor portion (14) are used as pole position signals of the brushless tachogenerator (15), a tachogenerator output (30) of the brushless tachogenerator (15) is converted to a DC output (41) within a synchronous rectification circuit (20) of the brushless tachogenerator (15), and the DC output (41) is used as a speed feedback signal of the three-phase brushless DC motor portion (14).SELECTED DRAWING: Figure 5

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Inventors:
KAWAKAMI KATSUYUKI
Application Number:
JP2017159172A
Publication Date:
March 14, 2019
Filing Date:
August 22, 2017
Export Citation:
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Assignee:
TAMAGAWA SEIKI CO LTD
International Classes:
H02P6/17; H02K11/215; H02K11/225; H02K11/33; H02K21/14; H02K29/08; H02K29/14
Attorney, Agent or Firm:
曾我 道治
梶並 順
大井 一郎
光永 和宏
金山 明日香