IEEE Power Electronics Magazine - September 2016 - 41
College of New York (CCNY) after
graduating from the Bronx High
School of Science in 1955. After spending two years at CCNY, and motivated
by his uncle, who was a doctor, Landsman transferred to MIT. For doctoral
study at MIT, he was supported by
National Science Foundation fellowships and further helped defray the
cost of his education by earning the
appointment of teaching assistant.
Landsman also served on active duty
in the U.S. Navy from 1960 to 1961.
Following graduation, he joined
the technical staff at MIT's Lincoln
Laboratory to work on the design and
construction of dc-dc power converters, servo amplifiers, and dc-ac
inverters for three synchronous orbit
Air Force communications satellites
[Lincoln Experimental Satellites
(LES) 7-9]. Landsman was responsible for the design, construction, and
testing of all power converters and
inverters (more than 36 units) used in
these spacecraft programs. He supervised the nickel-cadmium battery
selection and evaluation program for
the satellites. He also designed and
built a 1,500-W rotary transformer
(slip-ring replacement) for the satellites. Landsman is proud to say that
his power supplies, including the
solar panels, are still operational in
orbit as Lincoln Lab celebrated the
40th anniversary of the LES-9 satellites on 3 March 2016.
After the successful operation of
the LES satellites in orbit, operating
for more than twice their design
life, Landsman diverted his attention to solar energy and helped to
form the Energy Systems Engineering Group at Lincoln Laboratory in
1977. The primary mission of this
group was to design and demonstrate photovoltaic (PV) power systems using PV modules that were
first tested by NASA's Jet Propulsion Laboratory. During his tenure
at Lincoln Lab, he also served as a
consultant to the U.S. Department
of Energy (DOE) to monitor DOEfunded programs involved in devel-
oping advanced power conversion
solutions for PV power systems.
These converters ranged in size
from a few to 60 kW and included dc
to ac inverters for stand-alone and
uti l it y-i nteractive appl ications,
including tracking maximum-power-point voltage of a PV array under
varying conditions of insolation and
ambient temperature.
The research and development
work at Lincoln Lab and Energy Systems Engineering Group resulted in
new topologies and circuit analyses
that were presented at various conferences, including the major power electronics conference of the time, the
IEEE Power Electronics Specialists
Conference (PESC). During this time,
Landsman suggested the canonical
switching cell in his 1979 PESC paper,
"A Unifying Derivation of Switching
dc-dc Converter Topologies." He stated that all three basic topologies could
be compactly contained in a single
matrix, wherein the individual topology could be obtained by simply
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