Patent ID: 7982147
Filing Date: 2011-07-19
Classification: H01H,H02K,H02P

Abstract:
1. A centrifugal switching device of a single-phase induction motor having a start winding comprising: a centrifugal means including: a centrifugal base fixed with a motor spindle tightly having a sleeve shape and a flange, the centrifugal base may being turned or stopped with the motor spindle together as a same body; a centrifugal sleeve being received on said centrifugal base and may be moved in axial direction, said centrifugal sleeve may be turned or stopped by the centrifugal base; a spring being received on an outer surface of said centrifugal base, one end of the spring being coupled to the flange of said centrifugal base and other end of the spring pushing said centrifugal sleeve in an axial direction of the spindle; a first shaft coupling block rotatably connected with said centrifugal sleeve at one end and hingedly connected with a second shaft coupling block at the other end; the second shaft coupling block connected with said first shaft coupling block being rotatably connected with said centrifugal base at other end; a winding pressure switch spaced apart in the axial direction and fixed beside said centrifugal means; when the single-phase induction motor is stopped under a force of the spring, said centrifugal sleeve pushes contact of said winding pressure switch, thereby the start winding is connected with a power, and the motor turning to a predetermined speed, under a centrifugal force said first and second shaft coupling blocks move in a radial direction to bring said centrifugal sleeve to leave the contacts of said winding pressure switch, thereby the start winding is disconnected from the power.