Patent ID: 9048763
Filing Date: 2015-06-02
Classification: B60S

Abstract:
1. A control circuit for an electric motor, especially for driving a windshield wiper, wherein the control circuit comprises: a controller coupled to the electric motor, the controller capable of delivering an output signal for controlling the electric motor, the controller being able to send control signal to the electric motor to alter the angle of the motor between a given minimum value and a given maximum value, wherein the controller comprises an input for receiving a speed setpoint, wherein the controller controls the angular speed of the motor depending on the inputted speed setpoint; and a setpoint generator coupled to the electric motor, the setpoint generator comprising: an input for receiving values of the motor angle from the electric motor; and an output coupled to the controller for delivering the speed setpoint to the controller, wherein the setpoint generator defines the speed setpoint using a continuous function of the received values of the motor angle, wherein the continuous function is a function for which, when the motor angle approaches a given angle, the speed setpoint approaches a speed setpoint value defined for the given angle such that there are no abrupt changes in the speed setpoint value.