发明名称 |
A METHOD AND APPARATUS FOR IMPROVED LOW CURRENT ACCURACY IN MULTI-PHASE STEP MOTORS |
摘要 |
<p>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.</p> |
申请公布号 |
EP1654800(B1) |
申请公布日期 |
2013.09.04 |
申请号 |
EP20040779308 |
申请日期 |
2004.07.27 |
申请人 |
SCHNEIDER ELECTRIC MOTION USA, INC. |
发明人 |
COUTU, DAVID;FOURNIER, ROBERT, A. |
分类号 |
H02P8/12;G05B19/40;H02P8/00 |
主分类号 |
H02P8/12 |
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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