Motor-driven compressor
US12292217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2024 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Mar 8, 2044 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A noise reducing unit includes a common mode choke coil and a first damping portion that is made of a nonmagnetic material. The common mode choke coil includes an annular core, a first winding wound around the core, and a second winding wound around the core and spaced apart from the first winding. The first damping portion surrounds the first winding and the second winding. The first damping portion is configured such that an induced current flows in the first damping portion to generate magnetic flux that resists changes in leakage flux leaking from the core. The noise reducing unit further includes a second damping portion that is made of a magnetic material. The second damping portion is disposed on an opposite side of the first damping portion from the common mode choke coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.