Method for operating an electrical drive system, electrical control device and electrical drive system

摘要

Method for operating an electric drive system (1), the electric drive system (1) comprising: - a first electric motor (2) which is assigned to a first axis (3), - a second electric motor (4) which is assigned to a second axis ( 5) is assigned, - a first bridge circuit (6) with a number of bridge branches (7, 8, 9), the bridge branches (7, 8, 9) each having a number of upper switching means (15_1, 15_3, 15_5) which can be controlled by pulse width modulation and have a number of pulse-width modulated controllable lower switching means (15_2, 15_4, 15_6), the first bridge circuit (6) being designed to generate control signals (U1, V1, W1) for the first electric motor (2), and a second bridge circuit (10) with a number of bridge branches (11, 12, 13), the bridge branches (11, 12, 13) each controlling a number of upper switching means (15_7, 15_9, 15_11) that can be controlled by pulse width modulation and a number of pulse width modulated have the lower switching means (15_8, 15_10, 15_12), the second bridge circuit (10) being designed to generate control signals (U2, V2, W2) for the second electric motor (4), the method comprising the steps of: - pulse-width-modulated control the upper switching means (15_1, 15_3, 15_5) of the first bridge circuit (6) with an associated pulse pattern, in which a rising edge is first generated within a period (P) of the pulse width modulation and then a falling edge is generated, and pulse width modulated control of the upper switching means (15_7, 15_9, 15_11) of the second bridge circuit (10) with an associated pulse pattern, in which a falling edge is first generated within a period (P) of the pulse width modulation and then a rising edge is generated.