发明名称 |
BRUSHLESS MOTOR DRIVE DEVICE |
摘要 |
A Hall sensing circuit generates a positional detection signal representative of a positional relationship between a rotor and a phase coil of a motor. A signal synthesizing circuit transforms the positional detection signal to a driving signal. Based on a comparison of the driving signal and a high-frequency reference signal, a pulse signal is generated for controlling a switching circuit to drive the motor. A current error signal is supplied through feedback to adjust a relative relationship between an amplitude of the drive signal and an amplitude of the high-frequency reference signal, thereby changing a duty ratio of the pulse signal. A duty-ratio limiting circuit is provided to limit the duty ratio of the pulse signal for ensuring a reliable rotation of the motor.
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申请公布号 |
US2006049785(A1) |
申请公布日期 |
2006.03.09 |
申请号 |
US20050907240 |
申请日期 |
2005.03.25 |
申请人 |
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发明人 |
TZENG GUANG-NAN;JUANG FENG-RURNG;CHEN CHI-YANG |
分类号 |
H02K23/00;H02P6/14;H02P6/16 |
主分类号 |
H02K23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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