| 摘要 |
<p>PURPOSE:To apply an electric brake to an electric governor motor by turning ON a pair of PNP transistors forming a bridge by means of a control signal and short-circuiting an armature coil. CONSTITUTION:An MA input terminal 3, an MB input terminal 4 and an MS input terminal 5 are thrown to L under a brake mode, and since the MS input terminal 5 is on the L side, an NPN transistor 18 is remained at ON. Since the MA input terminal 3 and the MB input terminal 4 are both on the L side, a pair of PNP transistors 12 and 14 are turned ON and an armature coil 7 is short-circuited. Since PNP transistors 16 and 17 are turned ON at the same time, NPN transistors 13 and 15 are turned OFF. Thus, the electric brake can be applied.</p> |
