发明名称 |
MOTOR CONTROL CIRCUIT OVERCURRENT PROTECTION |
摘要 |
A microcontroller 4 provides the driving current to the windings of an electrical motor. The motor current is taken as one input 9 to a comparator 8 whose threshold input 10 is derived from a voltage divider circuit 11,12. In the event of an over-current condition the driving current to the windings in interrupted. Alternatively the threshold input may be a variable determined by the output of a low pass filter 14,15 which takes a variable frequency waveform as its input. The waveform is controlled by the microcontroller by output 16. |
申请公布号 |
EP1433235(A1) |
申请公布日期 |
2004.06.30 |
申请号 |
EP20020765073 |
申请日期 |
2002.10.03 |
申请人 |
MINEBEA CO. LTD. |
发明人 |
STRIKE, NIGEL DAVID;RIDDOCH, HENRY |
分类号 |
H02H3/00;H02H7/08;H02P6/12;H02P29/02 |
主分类号 |
H02H3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|