Title:
CIRCUIT BOARD, MOTOR UNIT, AND FAN
Document Type and Number:
WIPO Patent Application WO/2019/054013
Kind Code:
A1
Abstract:
According to the present invention, EMC performance of an electronic device equipped with a motor is improved. This circuit board (12) is provided with: a substrate (130); lands (P4, P5) that are formed on a main surface (131) of the substrate (130) and that are for connecting a coil (17) of the motor (11); a magnetic detection element (122) that outputs a detection signal corresponding to the position of a rotor (14) of the motor (11); and a motor drive control IC (121) that generates drive signals (VOUTA, VOUTB) for driving the motor (11) on the basis of the detection signal, wherein the magnetic detection element (122) and the motor drive control IC (121) are disposed in a region (AR1) on the side of an inferior angle (θ) formed by a first straight line (a) and a second straight line (b), among regions which are on the main surface and are defined by the first straight line and the second straight line when viewing the substrate (130) from the main surface, the first straight line connecting a land (P4) and an axial line of an output shaft of the motor (11), and the second straight line connecting a land (P5) and the axial line of the motor (11).
Inventors:
SEIMA TOSHIAKI (JP)
TAMAI KOICHI (JP)
MOROHASHI HARUOMI (JP)
SAITO KAZUAKI (JP)
TAMAI KOICHI (JP)
MOROHASHI HARUOMI (JP)
SAITO KAZUAKI (JP)
Application Number:
PCT/JP2018/024866
Publication Date:
March 21, 2019
Filing Date:
June 29, 2018
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H05K1/18; H02K11/30; H02K29/08; H05K1/02; H05K9/00
Foreign References:
| JP2007012771A | 2007-01-18 | |||
| JP2009148103A | 2009-07-02 | |||
| JPH09285075A | 1997-10-31 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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