Drive device and power conversion device
US10700590B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Jun 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0081
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive device includes: a gate driving unit that has gate driving circuits each driving gates of switching elements connected to each other in series; a negative-side power source that supplies a negative potential to the gate driving unit, where the negative potential steps down a reference potential that is a potential on a low side of the switching element; a negative-side capacitor for supplying a negative potential to the gate driving unit, where the negative potential steps down a reference potential that is a potential on a high side of the switching element; a timing detecting circuit that detects charging timing at which the negative-side capacitor is to be charged based on a potential state of the gate driving circuit on a high side; and a charging circuit that charges the negative-side capacitor by using the negative-side power source at the charging timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.