Mci (mirror Controls International) Netherlands B.v.

Hendrik Jan Meijdam

Jinku Hu

Bastiaan Huijzers

As first aspect provides, in an electronic control circuit, a method of controlling an electromotor of an actuator for controlling a position of an actuatable object of a vehicle. The method comprises receiving an instruction to hold position of the actuatable object, obtaining an initial hold voltage pattern for the electromotor and applying the initial hold voltage pattern to the electromotor. The method further comprises determining movement data on movement of the actuatable object, determining an adjusted hold voltage pattern based on the movement data and applying the adjusted hold voltage pattern to the electromotor. By applying a particular voltage to the electromotor—stator, rotor or both, depending on the type—, a magnetic force between rotor and stator may be created to counteract any external force. The voltage applied for holding the stator is determined on detection of any movement of the rotor.

Method for controlling a position of an actuatable object of a vehicle

An electric motor assembly is configured to determine a motor winding resistance value. Predicted values are determined for a first and second position of motor commutator sections relative to the motor brushes, with at least one of the brushes contacting different numbers of the sections in the first position and the second position. The predicted values are based on a temperature value measured by the temperature sensor and a predetermined dependence of variation of the motor resistance dependent on the temperature value. An electric motor current value is measured by a current sensor when the electric motor is substantially at standstill. A selection is made between different factors for determining the motor resistance value using the electric current value, dependent on which of the predicted values most closely corresponds to the electric current value. The motor resistance is determined using said electric current value according to the selected factor.

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Utrecht, Netherlands

Hendrik Jan Meijdam