CIRCUIT ARRANGEMENT AND A METHOD FOR CONTROLLING AN AC DRIVE SYSTEM OF AN ELECTRIC VEHICLE

摘要

Circuit arrangement for controlling an AC drive system of an electric vehicle comprising at least one asynchronous drive motor (1) associated with at least one wheel of the vehicle, at least one frequency converter unit (3) having at least one AC heavy-current input and at least one AC heavy-current output (U/T1, V/T2, W/T3), the at least one AC heavy-current output (U/T1, V/T2, W/T3) is in connection with the at least one asynchronous drive motor (1), a battery unit (7) supplying current consumers of the vehicle, including the at least one frequency converter unit (3), a control unit (19) connected to the at least one frequency converter unit (3), wherein a direct current output of the battery unit (7) is connected through a switching unit (5) to terminals (+,−) for an optional external DC choke of the at least one frequency converter unit (3, 4). A method for controlling an AC drive system of an electric vehicle, comprising the steps of generating alternating current from a direct current supply voltage by a frequency converter unit (3, 4) having at least one DC heavy-current input and at least one DC heavy-current (U/T1, V/T2, W/T3) output, supplying at least one asynchronous drive motor (1) associated with at least one wheel of the vehicle with the generated alternating current, and supplying the frequency converter units (3, 4) with direct current through terminals (+, −) of the frequency converter units (3, 4) serving for connecting a damping DC choke.