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Selection, Sizing and Control of Adjustable Speed Motor Drives for Stressful and Fault Tolerant Applications Babak Fahimi, Electro Standards Laboratories Inc. Hamid A. Toliyat, Texas A&M University
Time: 8:00 AM - Noon and 1:00 PM - 5:00 PM Date: October 13th, 2002 Location: Conference Room 'D' on Conference Level Abstract: Design and development of modern electromechanical
energy conversion devices for high impact ancillary automotive and
military products is of paramount importance. The performance of an
electromechanical energy conversion device, as a direct link between
electrical and mechanical terminals, is highly affected by input/output
characteristics of thereto-connected components. Indeed, a successful
operation of the auxiliary electromechanical devices requires full
compatibility under the loading effects as dictated by its
electrical/mechanical ends. This can be referred to as “design in the
context of the application.” The loading effects on each terminal can be
broadly classified into dynamic and steady state. These conditions should
be taken into considerations throughout the design process viz. Selection,
sizing and control of the device. We will address this important problem
in the proposed tutorial. Furthermore, employment of adjustable speed
motor drives in high impact automotive, aerospace and military
applications demands for a new generation of design and control strategies
well known as ˇ§fault tolerant designˇ¨. In fact, fault tolerance and
enhanced survivability plays a central role in design and development of
advanced auxiliary motor drives in such applications. This in turn calls
for a modular configuration in respective magnetic and electronics
architecture of modern motor drives. In this reference, there are several
probable failures which can potentially undermine the capability of
automotive motor/generator drives in providing a reliable and continuos
service. This includes failures in the following parts of the system:
In order to illustrate an entirely fault
tolerant performance, a hierarchical reconfiguration of the control
strategy along with corresponding hardware modification needs to be
established. The main objective of such control strategy would be to:
The short course will focus on design and
control strategies which serves the purpose of Fault tolerance as it is a
vital requirement in military applications. Examples of re-organizing
controllers will be demonstrated to illustrate the significance and
practicality of this concept. Design of automotive integrated starter/generator for automotive applications, and fault tolerant assist motor drive for electrically assisted power steering are chosen to explain the details of the proposed design philosophy. These examples depict a collection of important characteristics ranging from ultra high-speed motion to near zero speed requirements for control of the drive. In order to give an insightful physical understanding of each step, we will provide theoretical proof as evidenced by measurement data. This seminar is prepared such that practicing engineers and graduate students can absorb it entirely.
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