Method and device for generating PWM pulses for multi-level inverter
US9385701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2015 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Oct 15, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and a device for generating PWM pulses for an inverter are provided. The three-phase inverter's characteristic of including high frequency complementary switches is used. Only three PWM peripheral units of a DSP control unit are used to output PWM high frequency signals, and a detection control unit determine for each phase two currently high frequency complementary switches according to the states of detected level signals outputted by a preset number of GPIO interfaces. The PWM high frequency signals are distributed for each phase to one of the two switches, and the PWM high frequency signals are inversed and then sent to the other one of the two switches. In addition, the states of other switches are maintained unchanged according to a preset correspondence between states of switches of a multi-level inverter and outputted level signals in different switching periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.