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US 2006/0125440 A1Published application
Controller for a synchronous motor
AssigneeCambridge Consultants Limited
InventorsBenjamin Gordon, Robert Bower
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AssigneeCambridge Consultants Limited
InventorsBenjamin Gordon, Robert Bower
Estimating the term…
A controller for a synchronous motor, the controller being operable in use to receive from sensor means coupled to a synchronous motor actual angular displacement signals representative of angular displacements from a reference orientation of a rotor of a synchronous motor, to transmit the actual angular displacement signals to a controllable alternating current (ac) supply for the motor, periodically to measure one or more parameters related to the torque of a synchronous motor, and between transmissions of the actual angular displacement signals, to derive from the actual angular displacement signals and measured parameters at least one estimated angular displacement signal representative of an estimated angular displacement from a reference orientation of a rotor of a synchronous motor, to enable the controller to cause to flow between the supply and a synchronous motor a generally sinusoidal current that is synchronised to the angular displacement of the rotor from the reference orientation.
A controller for a synchronous motor, the controller being operable in use to receive from sensor means coupled to a synchronous motor actual angular displacement signals representative of angular displacements from a reference orientation of a rotor of a synchronous motor, to transmit the actual angular displacement signals to a controllable alternating current (ac) supply for the motor, periodically to measure one or more parameters related to the torque of a synchronous motor, and between transmissions of the actual angular displacement signals, to derive from the actual angular displacement signals and measured parameters at least one estimated angular displacement signal representative of an estimated angular displacement from a reference orientation of a rotor of a synchronous motor, to enable the controller to cause to flow between the supply and a synchronous motor a generally sinusoidal current that is synchronised to the angular displacement of the rotor from the reference orientation.
A method of controlling a synchronous motor, comprising the steps of receiving from sensor means coupled to a synchronous motor an actual angular displacement signal representative of an angular displacement from a reference orientation of a rotor of the motor, transmitting the actual angular displacement signal to a controllable alternating current (ac) supply, measuring one or more parameters related to an angular acceleration of the rotor, deriving, using a mathematical model of the motor, from the actual displacement signal and the one or more parameters an estimated angular displacement signal representative of an estimated angular displacement of the rotor, transmitting the estimated angular displacement signal to the controllable ac supply, and thereby causing to flow between the controllable ac supply and the motor a generally sinusoidal current that is synchronised to the angular displacement of the rotor.
Dependencies are inferred from the claim text.