Title:
ブラシモータ
Document Type and Number:
Japanese Patent JP6510941
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a brush motor capable of achieving multipolarization and reduction in size and weight while preventing overheat caused by overcurrent.SOLUTION: A multipolar brush motor that generates a rotational power in one direction and that has four or more magnetic poles, comprises: a rotary armature having an equalizer line; a commutator provided on the rotary armature; first and second brushes contacted with the commutator; a duty controller that controls a duty of a voltage pulse applied between the first and second brushes; a PWM signal generator that outputs a PWM signal corresponding to information on the duty; a drive transistor connected between any one of the first and second brushes and any one of a power supply and the ground, and on/off-controlled by the PWM signal, and that applies a voltage of the power supply to between the first and second brushes as the voltage pulse; and a current detection element that detects a current value of a current flowing through the drive transistor. The duty controller controls the duty of the PWM signal in a case where the detected current value is larger than a set current value.SELECTED DRAWING: Figure 2
Inventors:
Yoshichika Kawashima
Minoru Hasebe
Minoru Hasebe
Application Number:
JP2015188054A
Publication Date:
May 08, 2019
Filing Date:
September 25, 2015
Export Citation:
Assignee:
Mitsuba Co., Ltd.
International Classes:
H02P7/29; B60S1/08
Domestic Patent References:
| JP2013110880A | ||||
| JP2006353019A | ||||
| JP6105453A | ||||
| JP6171470A | ||||
| JP52014881Y1 | ||||
| JP4351482A | ||||
| JP2002044860A | ||||
| JP5252778A |
Foreign References:
| WO2014185123A1 | ||||
| US20120293096 |
Attorney, Agent or Firm:
Nishizawa Kazumi
Shingo Suzuki
Koichiro Kamata
Masatake Shiga
Suzuki Mitsuyoshi
Shingo Suzuki
Koichiro Kamata
Masatake Shiga
Suzuki Mitsuyoshi