Patent ID: 6404154
Filing Date: 2002-06-11
Classification: B23K,H02P

Abstract:
A force control system for an electromagnetic actuator, the actuator having a stationary member with a core, a movable member and at least one phase coil positioned to establish a magnetic flux in the core when the phase coil is energized to exert a force on the movable member, the force control system comprising:an observer that outputs signals representing the instantaneous position and velocity of the movable member; a position controller receiving the output of the observer and signals representing a desired position and a desired velocity; the position controller comparing the output of the observer with the desired position and velocity signals to generate position and velocity error signals; the position controller generating force command signals required to position the movable member at the desired position with the desired velocity based on the position and velocity error signals; a flux controller receiving the force command signals and converting the force command into a flux command signal; and the flux controller generating a phase energization signal based on the flux command signal.