US 12,438,482 B2
Method for operating a drive system and drive system for carrying out the method
Thomas Schuster, Ottenbach (DE); and Manuel Fuchs, Kronau (DE)
Assigned to SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
Appl. No. 18/279,937
Filed by SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
PCT Filed Feb. 7, 2022, PCT No. PCT/EP2022/052911
§ 371(c)(1), (2) Date Sep. 1, 2023,
PCT Pub. No. WO2022/184383, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 102021001177.5 (DE), filed on Mar. 4, 2021.
Prior Publication US 2024/0154546 A1, May 9, 2024
Int. Cl. H02M 1/15 (2006.01); H02P 5/74 (2006.01)
CPC H02P 5/74 (2013.01) 31 Claims
OG exemplary drawing
 
1. A method for operating a drive system having a plurality of inverters and a data bus, each inverter including an AC-side terminal adapted to feed a respective electric motor, DC-side terminals of the inverters being connected in parallel with one another and the parallel connection being connected to a DC-side terminal of a rectifier, each inverter including semiconductor switches adapted to be driven according to a pulse width modulation, the inverters being arranged as bus subscribers of a data bus to which a module arranged as master is also connected, comprising:
assigning a respective bus address to each inverter; and
after the assigning, specifying a polarity of the pulse width modulation to each inverter;
wherein the polarity of a first one of the inverters is different than the polarity of a second one of the inverters; and
wherein, for address assignment, a respective inverter supplies a voltage signal to a downstream inverter, with which the downstream inverter is signaled to accept the address contained in a temporally subsequent next broadcast telegram of the master as its own bus address and to supply a further voltage signal to a further inverter if such an inverter is present and otherwise to adapt the polarity of its pulse width modulation to the polarity information contained in the broadcast telegram.