Method for digital control of a universal motor, in particular for electrical household appliances
AssigneeCrouzet Appliance Controls
InventorPhillippe Foureys
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Abstract
The invention concerns a method for digital control of a universal motor, in particular for electrical household appliance, comprising steps which consist on: measuring said engine (21) rotation speed; determining the difference between the measured speed and a set speed; and controlling the motor on the basis of said difference. Said method further comprises a step (24, 25) which consists in estimating at least one of the values of the resisting torque (C) and the current (i) in the motor windings. The invention is useful for controlling washing machines.
Claims22
A method for the digital control of a universal motor, having a triac, the method comprising the steps of:
- measuring the speed of rotation (ω) of the said motor,
- determining the difference between the measured speed and a reference speed (ωc), and
- controlling a triggering angle of the triac as a function of said difference,
- characterized by the fact that the step of determining the difference between the measured speed and the reference speed comprises a step of estimating at least one of the quantities comprising the resistive torque (C) and the current (i) in the motor windings.
Dependencies are inferred from the claim text.