Miniature high speed compressor having embedded permanent magnet motor

US7942646B2 · kind B2 · utility

Assignee

• University of Central Florida · US

Inventors

• Lei Zhou · Tianjin, CN
• Liping Zheng · Shanghai, CN
• Louis Chow · Orlando, US
• Jayanta Sankar Kapat · Oviedo, US
• Thomas Xinzhang Wu · Orlando, US
• Krishna Kota · Orlando, US
• Xiaoyi Li · Sha Tin, CN
• Dipjyoti Acharya · Orlando, US

Key dates

• Filing date: May 22, 2007
• Grant date: May 17, 2011
• Expiry date: Mar 16, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B30/70
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A high speed centrifugal compressor for compressing fluids includes a permanent magnet synchronous motor (PMSM) having a hollow shaft, the being supported on its ends by ball bearing supports. A permanent magnet core is embedded inside the shaft. A stator with a winding is located radially outward of the shaft. The PMSM includes a rotor including at least one impeller secured to the shaft or integrated with the shaft as a single piece. The rotor is a high rigidity rotor providing a bending mode speed of at least 100,000 RPM which advantageously permits implementation of relatively low-cost ball bearing supports.