Title:
HYBRID PULSE WIDTH MODULATION METHOD FOR VARIABLE SPEED DRIVE
Document Type and Number:
WIPO Patent Application WO/2014/123713
Kind Code:
A3
Abstract:
A system or method controlling a variable speed drive based on PWM techniques, wherein a first PWM method is used when the input current is less than a predetermined threshold value, for higher efficiency and lower total harmonic distortion (THD); and a second PWM method comprising a discontinuous modulation signal is used when the input current is greater than the predetermined threshold value for higher efficiency. By doing so, the maximum efficiency of VSD within the whole operation range can be achieved.
Inventors:
WU ZHIQIAO (US)
KANE AJIT W (US)
ADIGA-MANOOR SHREESHA (US)
KANE AJIT W (US)
ADIGA-MANOOR SHREESHA (US)
Application Number:
PCT/US2014/013272
Publication Date:
July 16, 2015
Filing Date:
January 28, 2014
Export Citation:
Assignee:
JOHNSON CONTROLS TECH CO (US)
International Classes:
H02P27/08; H02P4/00
Foreign References:
| US20100164581A1 | 2010-07-01 | |||
| US20120112674A1 | 2012-05-10 | |||
| US20070216344A1 | 2007-09-20 |
Attorney, Agent or Firm:
SMITH, William P. et al. (100 Pine StreetP.O. Box 116, Harrisburg Pennsylvania, US)
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