Invention Grant
- Patent Title: Motor driving apparatus and motor apparatus using the same
- Patent Title (中): 电动机驱动装置及使用其的电动机装置
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Application No.: US13440154Application Date: 2012-04-05
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Publication No.: US09035582B2Publication Date: 2015-05-19
- Inventor: Tetsuo Yamato , Takashi Fujimura
- Applicant: Tetsuo Yamato , Takashi Fujimura
- Applicant Address: JP Kyoto
- Assignee: Rohm Co., Ltd.
- Current Assignee: Rohm Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Fish & Richardson P.C.
- Priority: JP2011-083288 20110405
- Main IPC: H02P6/16
- IPC: H02P6/16 ; H02P6/10 ; H02P6/08 ; B62D5/04 ; H02P3/14 ; D06F33/02
Abstract:
A motor driving apparatus includes an automatic gain control circuit on a signal path for transmitting a rotor-position detecting signal (hall voltage signal), and the automatic gain control circuit includes: an amplifier, configured to perform differential amplification on an input signal (step-angle hall current signal) to generate an output signal (amplified hall current signal); and a feedback control portion, configured to monitor the output signal (monitored current signal) to decide a gain of the amplifier.
Public/Granted literature
- US20120262097A1 MOTOR DRIVING APPARATUS AND MOTOR APPARATUS USING THE SAME Public/Granted day:2012-10-18
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