Electromagnetic filtering of a control circuit of an electric motor
US11606057B2 · kind B2 · utility
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10Claims
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Assignee
Inventors
Key dates
| Filing date | Sep 25, 2019 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Nov 29, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit of an electric motor includes a filtering device in order to filter high frequencies likely to produce perturbing electromagnetic radiation when the electric motor is driven. To this end, the filtering device includes one or more filtering capacitors branched off from a power bridge driving the electric motor, wherein at least a proportion of the filtering capacitors is of a polymer-hybrid type in order to improve dynamic performance of the filtering device and to reduce its size. A motorized-fan unit for motor vehicles including such a control circuit is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.