Peter John Lawrenson, FIEE, FIEEE,
FRS,
FREng
Fellowship of the Royal Academy of Engineering (FREng) is an award and Scholarship, fellowship for engineers who are recognised by the Royal Academy of Engineering as being the best and brightest engineers, inventors and technologists in the UK a ...
(12 March 1933 – 27 October 2017) was an
Emeritus Professor
Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who professes". Professors ...
of
Electrical Engineering at the
University of Leeds
, mottoeng = And knowledge will be increased
, established = 1831 – Leeds School of Medicine1874 – Yorkshire College of Science1884 - Yorkshire College1887 – affiliated to the federal Victoria University1904 – University of Leeds
, ...
who pioneered and championed the development of
switched reluctance drive technology. He also made significant contributions to the analysis and computation of magnetic fields and electrical machines in general, writing several notable text books along with colleagues Kenneth Binns, Martyn Harris and J. Michael Stephenson and latterly with
C.W. ("Bill") Trowbridge.
Biography
Lawrenson was born in
Prescot
Prescot is a town and civil parish within the Metropolitan Borough of Knowsley in Merseyside, England. Within the boundaries of the historic county of Lancashire, it lies about to the east of Liverpool city centre. At the 2001 Census, the c ...
,
Lancashire
Lancashire ( , ; abbreviated Lancs) is the name of a historic county, ceremonial county, and non-metropolitan county in North West England. The boundaries of these three areas differ significantly.
The non-metropolitan county of Lancash ...
, and educated at the
University of Manchester
, mottoeng = Knowledge, Wisdom, Humanity
, established = 2004 – University of Manchester Predecessor institutions: 1956 – UMIST (as university college; university 1994) 1904 – Victoria University of Manchester 1880 – Victoria Univ ...
from which he held the degrees of
BSc
A Bachelor of Science (BS, BSc, SB, or ScB; from the Latin ') is a bachelor's degree awarded for programs that generally last three to five years.
The first university to admit a student to the degree of Bachelor of Science was the University ...
,
MSc and
DSc DSC may refer to:
Academia
* Doctor of Science (D.Sc.)
* District Selection Committee, an entrance exam in India
* Doctor of Surgical Chiropody, superseded in the 1960s by Doctor of Podiatric Medicine
Educational institutions
* Dalton State Col ...
. From 1956 to 1961 he was a research engineer at
GEC. His early published activities include work on linear electrical machines with
Eric Laithwaite
Eric Roberts Laithwaite (14 June 1921 – 27 November 1997) was a British electrical engineer, known as the "Father of Maglev" for his development of the linear induction motor and maglev rail system.
Biography
Eric Roberts Laithwaite wa ...
, in which the linear induction motor was considered as a propulsion means for the shuttle in textile weaving machines.
In 1961 Lawrenson was appointed a
Lecturer in
Electrical Engineering at the
University of Leeds
, mottoeng = And knowledge will be increased
, established = 1831 – Leeds School of Medicine1874 – Yorkshire College of Science1884 - Yorkshire College1887 – affiliated to the federal Victoria University1904 – University of Leeds
, ...
, from where his publications show growing interest in reluctance machines - initially AC-fed synchronous reluctance motors and later doubly-salient synchronous machines such as stepper motors (resulting in numerous further publications throughout the 1970s, often co-authored with research students and colleagues including Austin Hughes, Michael Stephenson, Paul Acarnley, Philip Blenkinsop, Norman Fulton and Jasmin Corda, to name but some of his co-workers). The first seminal paper on switched reluctance machines was published in 1980. He remained at Leeds for 30 years, being promoted to
Reader
A reader is a person who reads. It may also refer to:
Computing and technology
* Adobe Reader (now Adobe Acrobat), a PDF reader
* Bible Reader for Palm, a discontinued PDA application
* A card reader, for extracting data from various forms of ...
in 1965 and
Professor
Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who professes". Professors ...
of
Electrical Engineering in 1966. He retired from his chair in 1991 with the title
Emeritus Professor, in order to devote his full-time attention to the growing business he had co-founded in Leeds, Switched Reluctance Drives Ltd.
Lawrenson is considered the father of the
switched reluctance motor and associated drive technology.
[ Based on research work that had been carried out jointly by the ]University of Leeds
, mottoeng = And knowledge will be increased
, established = 1831 – Leeds School of Medicine1874 – Yorkshire College of Science1884 - Yorkshire College1887 – affiliated to the federal Victoria University1904 – University of Leeds
, ...
and the University of Nottingham
, mottoeng = A city is built on wisdom
, established = 1798 – teacher training college1881 – University College Nottingham1948 – university status
, type = Public
, chancellor ...
, in 1980 he and three colleagues (Michael Stephenson, Bill Ray and Rex Davis) established a design, technology development and licensing business, Switched Reluctance Drives Ltd. Initially based in Leeds
Leeds () is a city and the administrative centre of the City of Leeds district in West Yorkshire, England. It is built around the River Aire and is in the eastern foothills of the Pennines. It is also the third-largest settlement (by popula ...
, UK, the company was sold to Emerson Electric
Emerson Electric Co. is an American multinational corporation headquartered in Ferguson, Missouri. The ''Fortune'' 500 company manufactures products and provides engineering services for industrial, commercial, and consumer markets. in 1994, and whilst still based in the north of England at Harrogate
Harrogate ( ) is a spa town and the administrative centre of the Borough of Harrogate in North Yorkshire, England. Historically in the West Riding of Yorkshire, the town is a tourist destination and its visitor attractions include its spa w ...
, it became a wholly owned subsidiary of Nidec Corporation
is a Japanese manufacturer and distributor of electric motors. Their products are found in hard-disk drives, electric appliances, automobiles and commercial and manufacturing equipment. The company has the largest global market share for the tin ...
of Japan in 2010 (to whom Emerson sold its entire US-based motor interests). The former SR specialist unit was transferred to Nidec's Drive Systems subsidiary in 2016, but was much reduced in size and scope in 2019 when Nidec ended all manufacturing at the Harrogate site and greatly downsized the (until then) substantial engineering team. By now, under Nidec's direction, the business unit was already increasingly focused on other motor technologies, notably synchronous permanent magnet machines. Nidec Drive Systems continues to supply SR motors and inverters, but presently only for a minority of customer-specific industrial and off-road vehicle applications.
Lawrenson was the recipient of the Faraday Medal
The Faraday Medal is a top international medal awarded by the UK Institution of Engineering and Technology (IET) (previously called the Institution of Electrical Engineers (IEE)). It is part of the IET Achievement Medals collection of awards. ...
of the Institution of Electrical Engineers
The Institution of Electrical Engineers (IEE) was a British professional organisation of electronics, electrical, manufacturing, and Information Technology professionals, especially electrical engineers. It began in 1871 as the Society of T ...
, the ESSO Energy Gold Medal of The Royal Society
The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, re ...
and the J.A. Ewing Gold Medal of the Institution of Civil Engineers
The Institution of Civil Engineers (ICE) is an independent professional association for civil engineers and a charitable body in the United Kingdom. Based in London, ICE has over 92,000 members, of whom three-quarters are located in the UK, whi ...
. He was elected a Fellow
A fellow is a concept whose exact meaning depends on context.
In learned or professional societies, it refers to a privileged member who is specially elected in recognition of their work and achievements.
Within the context of higher education ...
of the Royal Academy of Engineering (FREng) in 1980 and of the Royal Society
The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, re ...
(FRS) in 1982.[ Lawrenson won the IEEE ]Edison Medal
The IEEE Edison Medal is presented by the Institute of Electrical and Electronics Engineers (IEEE) "for a career of meritorious achievement in electrical science, electrical engineering, or the electrical arts." It is the oldest medal in this fi ...
in 2005 ''For outstanding contributions to the field of electrical machines, most notably the development and commercialization of switched reluctance drives''.[
Lawrenson was president of The ]Institution of Electrical Engineers
The Institution of Electrical Engineers (IEE) was a British professional organisation of electronics, electrical, manufacturing, and Information Technology professionals, especially electrical engineers. It began in 1871 as the Society of T ...
from 1992 to 1993.
References
{{DEFAULTSORT:Lawrenson, Peter
1933 births
2017 deaths
British electrical engineers
Fellow Members of the IEEE
IEEE Edison Medal recipients
Fellows of the Royal Academy of Engineering
Fellows of the Royal Society
Academics of the University of Leeds
Alumni of the University of Manchester