METHOD AND CIRCUIT ARRANGEMENT FOR LIMITING PEAK CURRENTS AND THE SLOPE OF THE CURRENT EDGES

摘要

A method for limiting peak currents, particularly depending on a charge quantity provided by a voltage source, and the maximum pitch of the current flanks of an electric motor for an electrohydraulic motor vehicle brake system, particularly a pump motor, controlled by pulse width modulation, wherein a change to an actual duty cycle of the PWM is made by a first duty cycle of the PWM on a second duty cycle at runtime, wherein the change takes place according to a positive or negative pitch value calculated and/or changeable at runtime. The invention further describes an electronic circuit arrangement for the implementation of a method for limiting peak currents and the maximum pitch of current flanks.

主权项

1. A method for limiting peak currents, on the basis of the charge quantity provided by a voltage source, and also the maximum slope of the current edges of an electric pump motor, actuated by pulse width modulation, in an electrohydraulic motor vehicle brake system, wherein an actual duty cycle of the PWM is changed from a first duty cycle of the PWM to a second duty cycle at execution time, wherein the change is made in accordance with a positive or negative slope value that is calculated and/or can be changed at execution time.