Global closed loop control system with dv/dt control and EMI/switching loss reduction
US7061195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Aug 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/168
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides a noise level indication to a system controller. Power switches in both a power converter and power inverter are cooperatively controlled with dynamic dv/dt control to reduce switching noise according to a profile specified by the controller. The dv/dt control is provided as an analog signal to a high voltage IC and codified as a pulse width for a level shifting circuit supplying control signals to the high voltage gate drive. A noise extraction circuit and technique obtain fast noise sampling to permit noise cancellation and adaptive noise reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.