Title:
モータ駆動回路
Document Type and Number:
Japanese Patent JP5444834
Kind Code:
B2
Abstract:
A first semiconductor switching element connects to a high side of a motor and includes a diode whose cathode faces the high side. A second semiconductor switching element having a diode resides on a low side of the first semiconductor switching element. A third semiconductor switching element having a diode resides on a low side of the motor. A fourth semiconductor switching element is connected in parallel to the motor and configures a return current circuit that includes a return current element and causes a return current that arises when the first semiconductor switching element turns off to flow through the return current element. A control portion controls on-off states of the first to the fourth semiconductor switching elements and performs return current circuit failure detection based on a first monitor voltage that is an electric potential of a connecting point between the first semiconductor switching element and the motor.
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Inventors:
Isao Okamoto
Hiroyuki Matsumori
Shuichi Yonemura
Hiroyuki Matsumori
Shuichi Yonemura
Application Number:
JP2009121019A
Publication Date:
March 19, 2014
Filing Date:
May 19, 2009
Export Citation:
Assignee:
Advics Co., Ltd.
International Classes:
H02P7/29; H02P7/291
Domestic Patent References:
| JP2008099474A | ||||
| JP2008054443A | ||||
| JP2001511636A |
Attorney, Agent or Firm:
Yoji Ito
Takahiro Miura
Fumihiro Mizuno
Takahiro Miura
Fumihiro Mizuno