초록 ▼

The invention relates to a control circuit (3) for an electric motor, in particular for driving a windshield wiper, including a control means (16) comprising an output for controlling the electric motor, the control means being capable of varying the angle of the motor between a given minimum value

The invention relates to a control circuit (3) for an electric motor, in particular for driving a windshield wiper, including a control means (16) comprising an output for controlling the electric motor, the control means being capable of varying the angle of the motor between a given minimum value and maximum value. In particular, the control means (16) comprises an input for receiving a speed set point and is capable of controlling the angular speed of the motor according to the speed set point, the control circuit likewise including a set point means (14) comprising an input for receiving values of the angle of the motor and an output for providing a speed set point to the control means, the set point means (14) being capable of determining the speed set point from a continuous function of the motor angle. The invention likewise relates to a driving mechanism (2) for producing an alternating rotary motion comprising a circuit (3) such as described previously and an electric drive motor (4), as well as to a windshield wiper device (I) including at least one driving mechanism (2) such as described previously and an windshield wiper arm (5) driven by the driving mechanism.

대표청구항 ▼

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 contro

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; anda 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. 2. The circuit as claimed in claim 1, wherein the setpoint generator is able to define a first angular value for the motor, which value is greater than the minimum value, and a second angular value lying between the first angular value and the maximum value, to deliver a speed setpoint varying with the value of the motor angle when the latter lies between the minimum value and the first value or between the second value and the maximum value, and to deliver a speed setpoint of constant absolute value when the value of the motor angle lies between the first and the second value. 3. The circuit as claimed in claim 2, in which the setpoint generator further comprises an input for selecting a user mode, and in which the value of the constant speed setpoint, and the maximum value, the minimum value, the first value and the second value of the motor angle, are defined depending on the user mode. 4. The circuit as claimed in claim 1, wherein the controller further comprises an input for receiving values of the angular speed of the motor, and wherein the controller is able to control the motor torque depending on the difference between the angular speed of the motor and the speed setpoint. 5. The circuit as claimed in claim 4, further comprising a definer comprising an input for receiving values of the motor angle, and an output for delivering, to the controller, the angular speed of the motor, the definer being able to calculate the angular speed of the motor using the values of the motor angle. 6. The circuit as claimed in claim 4, wherein the control means further comprises an input for receiving a motor angle setpoint and an input for receiving motor angle values, and is able, in phases when the motor is stopped, to control the motor depending on the difference between the motor angle and the motor angle setpoint. 7. A driving device for producing an alternating rotary movement, comprising a circuit as claimed in claim 1, and a driving electric motor. 8. The driving device as claimed in claim 7, wherein the motor is a synchronous motor. 9. A windshield wiping device, for an automotive vehicle or an aircraft, comprising at least one driving device as claimed in claim 7, and a windshield wiper blade driven by the driving device. 10. A method for controlling an electric motor, comprising: operating the electric motor using a controller, the controller comprising: a controller coupled to the electric motor, the controller capable of delivering an output signal for controlling the electric motor; anda setpoint generator coupled to the electric motor, the setpoint generator comprising: an input for receiving values of a 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;controlling the motor using the controller to make the motor angle vary between a given minimum value and a given maximum value, and using the controller to alter an angular speed of the motor depending on the speed setpoint received by the controller from the setpoint generator. 11. The method as claimed in claim 10, wherein a first angular value of the motor, greater than the minimum value, and a second angular value, lying between the first angular value and the maximum value, are defined, the method further comprising altering the speed setpoint with the value of the motor angle when the motor lies between the minimum value and the first value or between the second value and the maximum value, and wherein a constant speed setpoint is delivered when the value of the motor angle lies between the first and the second value. 12. The method as claimed in claim 11, in which the value of the constant speed setpoint, and the maximum value, the minimum value, the first value and the second value of the motor angle are defined depending on a user mode. 13. The method as claimed in claim 10, wherein the motor torque is also controlled depending on the difference between the angular speed of the motor and the speed setpoint. 14. The method as claimed in claim 10, in which the motor is controlled depending on the difference between the motor angle and a motor angle setpoint, in phases when the motor is stopped.