发明名称 |
Motor drive device and integrated circuit device for motor driving |
摘要 |
A three-phase DC motor output stage including a predriver that supplies drive voltages to power MOSFETs supplies output voltages to three-phase coils, monitors whether each of gate-to-source voltages of the power MOSFETs is greater than or equal to a predetermined voltage and thereby detects a current zero cross, and employs the output of such current zero cross detection in PLL control for controlling energization switching timing and thereby forms drive voltages of 180-degree energization. Lower hooks with a voltage minimum phase as GND and upper hooks with a voltage maximum phase as a source are set as patterns alternately repeated for every electrical angle of 60 degrees. The patterns are expressed in linear approximation to generate sine wave-like drive voltages, thereby causing sine wave-like currents to flow into the three-phase coils.
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申请公布号 |
US2005067986(A1) |
申请公布日期 |
2005.03.31 |
申请号 |
US20040938568 |
申请日期 |
2004.09.13 |
申请人 |
KUROSAWA MINORU;KOKAMI YASUHIKO |
发明人 |
KUROSAWA MINORU;KOKAMI YASUHIKO |
分类号 |
H02P6/16;H02P6/10;(IPC1-7):H02P5/06 |
主分类号 |
H02P6/16 |
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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