Matrix converter and method for determining constants of alternating-current motor
US10110139B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2017 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | Oct 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A matrix converter includes a power converter circuit connectable on one side thereof with an alternating-current supply via a high-frequency filter and connectable on another side thereof with an alternating-current motor; a snubber circuit connected with a one-side line for connecting the high-frequency filter and the power converter circuit; a discharge switch discharging a charge accumulated in the snubber circuit depending on a voltage of the snubber circuit; and a control circuit configured to execute controlling the power converter circuit on the basis of a carrier frequency in test such that a test voltage is applied to the alternating-current motor, changing the carrier frequency in test on the basis of an operation state of the discharge switch, and determining constants of the alternating-current motor on the basis of a response state of the alternating-current motor at the time when the test voltage is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.