Invention Grant
- Patent Title: Hybrid pulse width modulation method for variable speed drive
- Patent Title (中): 用于变速驱动的混合脉宽调制方法
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Application No.: US14649052Application Date: 2014-01-28
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Publication No.: US09590540B2Publication Date: 2017-03-07
- Inventor: Zhiqiao Wu , Ajit W. Kane , Shreesha Adiga-Manoor
- Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY
- Applicant Address: US MI Holland
- Assignee: Johnson Controls Technology Company
- Current Assignee: Johnson Controls Technology Company
- Current Assignee Address: US MI Holland
- Agency: Fletcher Yoder, P.C.
- International Application: PCT/US2014/013272 WO 20140128
- International Announcement: WO2014/123713 WO 20140814
- Main IPC: G05B11/28
- IPC: G05B11/28 ; H02P6/00 ; H02M1/12 ; F02M25/08
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.
Public/Granted literature
- US20150318803A1 HYBRID PULSE WIDTH MODULATION METHOD FOR VARIABLE SPEED DRIVE Public/Granted day:2015-11-05
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