초록 ▼

Method and apparatus for matching the power output of a multitorque motor with the torque requirement of a connected load device. The stator windings of the motor are automatically connected in various different configurations to provide the optimum motor torque demanded by a connected load device w

Method and apparatus for matching the power output of a multitorque motor with the torque requirement of a connected load device. The stator windings of the motor are automatically connected in various different configurations to provide the optimum motor torque demanded by a connected load device which imposes varying load conditions on the motor. A novel control circuitry is connected between the motor starter and the motor stators. The control measures the power drawn by the motor stators and selects the most optimum configuration thereof which meets the changing torque requirements of the connected load device. This selection of optimum stator winding configurations commensurate with torque demand operates the motor in the lowest possible torque mode, which is considered the best electrical and mechanical operation of the motor and connected load device.

대표청구항 ▼

In a conveyor apparatus which conveys material from one location to another, wherein the mass of the conveyed material varies from one to another time interval, a three phase motor connected to move said conveyor, said motor having an automatic load seeking control circuitry for changing the stator

In a conveyor apparatus which conveys material from one location to another, wherein the mass of the conveyed material varies from one to another time interval, a three phase motor connected to move said conveyor, said motor having an automatic load seeking control circuitry for changing the stator winding of the motor from a high speed, high torque to a low speed, low torque configuration, comprising: a motor starter means for connecting each stator winding to a source of current; circuit means, including a first conductor means, for connecting the stator windings into a Y configuration; sensor means responsive to a predetermined maximum average current flow which is actuated after said average current flow has occurred during a first time interval; circuit means, including a second conductor means for connecting the stator windings into a DDD