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| Principal Investigator |
項目負責人 |
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| Professor HUI, Ron Shu Yuen |
許樹源教授 |
[ Profile ] |
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Contact: Knowledge Transfer Office |
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| Stage of Technology Transfer: Commercial viable technology/product ready for sale |
| Research Area:
Industrial Technologies |
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Abstract
Speed sensors are customarily used to detect the speed of power electronic driven motors, but that speed sensors could render the motor drive system unreliable. However, there are very few detection devices other than speed sensors that can generate readings when the motor drives are in a resting mode. The present invention overcomes the problem stated above by sampling the instantaneous motor current and obtaining the rate of change of the current. The instantaneous motor speed can then be derived from the known inverter switching states and motor parameters at all speeds, including zero speed. The readings of motor speed thus derived are instantaneous under all motor speeds.
Uniqueness and Competitive Advantage
• Lower operation cost
• Higher reliability
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Applications
The apparatus can be used to provide speed information under all speed conditions. It can be applied to both AC and DC motors driven by power electronic converters.
Contact Information
Mr Tomson Lee, Senior Technology Transfer Officer
Address: Technology Transfer Office, City University of Hong Kong
Room 401, Festival Walk Tower, 80 Tat Chee Avenue
Kowloon Tong, Hong Kong
Tel: (852) 3442 6441/3442 6859
Fax: (852) 2265 8028
Email: thmlee@cityu.edu.hk
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Copyright © 2007-2008 City University of Hong Kong. All rights reserved. |
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