Determining Rotor Position at Both Low and High Speeds
- Summary
- Researchers at Purdue University have developed an algorithm to estimate the rotor position of a PMSM from zero to high speeds, providing the accuracy of an optical encoder system, but at a substantially lower cost. Furthermore, this technology can utilize advanced control techniques, such as torque ripple mitigation, in the operation of the machine.
- Technology Benefits
- PMSMs at a lower costIncreased accuracy of rotor position sensing
- Technology Application
- Computer HardwareControl Techniques in Machine Operations
- Detailed Technology Description
- Steve PekarekPurdue Electrical and Computer Engineering
- Countries
- United States
- Application No.
- 7,885,785
- *Abstract
-
- *Background
- In order for a permanent magnet synchronous machine (PMSM) to operate properly, knowledge of the rotor position in the system is required. Typically, an in-line position encoder or three discrete Hall effect sensors are used to determine the rotor's position. While encoder systems are accurate, they are expensive, and Hall effect sensor systems are more cost effective, but they are not as accurate.
- *IP Issue Date
- Feb 8, 2011
- *IP Type
- Utility
- *Stage of Development
- Concept Developed
- *Web Links
- Purdue Office of Technology CommercializationPurdueInnovation and EntrepreneurshipSteve PekarekPurdue Electrical and Computer Engineering
- Country/Region
- USA
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