| 摘要 |
<p>1276436 Fluid-pressure servomotor systems BORG-WARNER CORP 23 April 1970 [12 May 1969] 19617/70 Heading G3P [Also in Division H1] An electro-hydraulic servovalve including a main valve body defining a divided fluid path, a pair of nozzles 19 disposed in spaced apart facing relation, each one of said nozzles being in fluid communication with a separate portion of the fluid path, a flapper 35 disposed between the nozzles at its one end and forming an armature 39 of a torque motor 11 at its other end, is characterized in that the torque motor includes at least one permanent magnet 53, at least one electric coil, and at least one compensating shunt 63 made of permeable material affixed to the permanent magnet so as to by-pass a portion of the permanent magnetic flux at low temperature and being responsive to temperature to reduce the amount of flux by-passed as temperature increases.</p> |
