Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1996-08-23
1998-03-03
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
318729, 318805, H02P 7622
Patent
active
057239665
ABSTRACT:
A system for increasing the efficiency of single and multi-phase induction motors. The system is comprised of a microcontroller which combines a time when the AC line current reaches zero amps with a time when AC line voltage to the AC motor reaches zero volts and with a digital measurement provided by an A/D converter to determine a servo error. The servo error determines whether the A/C motor needs more or less power. The microprocessor provides a control signal to a switching means to supply the minimum power required based on the servo error.
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Coombs David Maxwell
Straka Richard Stephen
Current Technology, Inc.
Moy Jeffrey D.
Ro Bentsu
Weiss Harry M.
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