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Subject: looking for a Phd or research position in motor drive or power electronic

Date: 09/04/02 at 4:00 PM
Posted by: beyond
E-mail: qin_ling@lycos.com
Message Posted:

i am a chinese phd student in canada and will interrupt my phd program before long. presently i am engaged in the research of online parameter identification in sensorless motor drive. with 1.5 years' experience in the research of vector-controlled algorithm after i got my master degree in electric machinery from shanghai jiaotong university in china, i came to canada in feb 2002.

i worked as the only engineer in the algorithm research in avansys power co.ltd, a division of emerson electric. the detailed information about our products (td3000, td3100 series) can be seen in the following website:


i also had a short experience in shanghai maglev transportation inc in china. my cv is as followed.


gender: male
birth: 08/1974
email: qin_ling@lycos.com

knowledge and interests:

strong basic knowledge in electric machinery, control theory and mathematics, including matrix theory, numerical calculation, optimization and stochastic theory

skillful in many necessary softwares and programming languages, such as matlab, saber, c, fortran and so on (familiar with tms320f240)

my research field for master degree is in electrical design of a dual-winding synchronous generator, in which one of the winding is used for the AC load, with the other converted into dc source powering the system. but all the works were done only in simulation

as an r&d electrical engineer in electric drive for 1.5 years after i got my master degree, i was engaged in algorithm research of vector-controlled drives
a) various schemes of speed sensorless controls. most of the available attempts had been made, including ekf, mras, state observer, back-emf and so on.
b) online to identify/adapt the system parameters, especially rotor resistance.
c) with good understanding in various pwm modes, harmonics analysis, overmodulation, and deadtime compensation

at present, i am engaged in rr online identification/adaptation for speed sensorless vector-controlled system. as well known, it is difficult to adaptive adjust rr well in a sensorless system. only to get useful information is essential while system is affected by so many noises like measurement, deadtime, parameters error, roundoff error for calculation and so on. Stochastic control theory, such as ekf, seems to be a good solution, but some further research must be taken

as an electric engineer in electric board for one year after i got my bachelor degree, i served in a 220kv-transformer station (my thesis for bachelor is in transient calculation of power system). the experience gave me a good impress on primary/secondary circuits and their relay protection at that time, though it wasnĄ¯t my main interest later

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