公开(公告)号：US20190052089A1

公开(公告)日：2019-02-14

申请号：US16080253

申请日：2017-01-26

Applicant: General Electric Company

Inventor： Govardhan GANIREDDY ,  Arvind Kumar TIWARI ,  Yashomani Y KOLHATKAR ,  Somakumar RAMACHANDRAPANICKER ,  Rahul Radhakrishna PILLAI

IPC: H02J3/38 ,  H02P9/00 ,  H02K17/42 ,  H02P9/48 ,  H02P9/06

Abstract: A power generation system (101) is disclosed. The power generation system (101) includes a variable speed engine (106) and a DFIG (108) coupled thereto. The DFIG (108) includes a generator (112), a rotor side converter (114), and a line side converter (116) electrically coupled to the generator (112). The rotor side converter (114) is configured to aid in operating the generator (112) as motor to crank the variable speed engine (106). The power generation system (101) further includes a PV power source (110) and/or an energy storage device (122) electrically coupled to a DC-link (118) between the rotor side converter (114) and the line side converter (116). A method of cranking the variable speed engine is also disclosed.

公开(公告)号：US20170272021A1

公开(公告)日：2017-09-21

申请号：US15462204

申请日：2017-03-17

Applicant: General Electric Company

Inventor： Shahid ALI ,  Rahul Radhakrishna PILLAI ,  Jigarkumar Narendrabhai HINGU ,  Vandana RALLABANDI

IPC: H02P25/03 ,  H02P27/06

Abstract: A driver unit for an interior permanent magnet motor (IPM) is presented. The driver unit includes sensor electronics configured to sense a phase voltage corresponding to one or more phase terminals of the IPM motor to generate a corresponding phase voltage signal. The driver unit further includes a controller electrically coupled to the sensor electronics and configured to extract one or more triplen harmonics of an order of a ninth harmonic and higher than the ninth harmonic of a fundamental frequency of the phase voltage signal corresponding to the one or more phase terminals. The controller is further configured to determine an angular position of a rotor of the IPM motor based on the extracted one or more triplen harmonics. Related motor assembly and method for controlling the IPM motor are also presented.