发明名称 |
Method and apparatus for improved low current accuracy in multi-phase step motors |
摘要 |
The sense signal, which is used to indicate that the motor phase current in a stepper motor is at the set point, is marked both before and after each pulse width modulator edge thereby reducing susceptibility to commutation noise from any phase. A mask time is created for a period before and after a PWM edge. The phase current is balanced during this mask time by removing and replacing the phase current.
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申请公布号 |
US6867566(B2) |
申请公布日期 |
2005.03.15 |
申请号 |
US20030641849 |
申请日期 |
2003.08.15 |
申请人 |
IMS INC. |
发明人 |
COUTU DAVID;FOURNIER ROBERT A. |
分类号 |
G05B19/40;H02P8/00;H02P8/12;(IPC1-7):H02P8/00 |
主分类号 |
G05B19/40 |
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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