System for managing DC link switching harmonics
US8860335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Dec 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A distributed motor drive system includes a power management module and multiple inverter modules integrated with the motors and located on a machine or process remote from the power management module. The power management module distributes DC voltage and command signals to each of the inverters. The DC voltage is distributed between modules via a DC link cable. The integrated inverters execute switching routines to convert the DC voltage to an AC voltage suitable for controlling the motor. Each of the power management module and the inverters includes a portion of the DC bus capacitance. The distributed motor drive system also includes a link inductance between the power management module and the inverters to limit the amount of reactive current generated by the inverters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.