Delta connected resonant snubber circuit

Patent · Tue Jan 20 00:00:00 EST 1998

OSTI ID:871337

Lai, Jih-Sheng ^[1]; Peng, Fang Zheng ^[2]

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1. Knoxville, TN
2. Oak Ridge, TN

A delta connected, resonant snubber-based, soft switching, inverter circuit achieves lossless switching during dc-to-ac power conversion and power conditioning with minimum component count and size. Current is supplied to the resonant snubber branches solely by the dc supply voltage through the main inverter switches and the auxiliary switches. Component count and size are reduced by use of a single semiconductor switch in the resonant snubber branches. Component count is also reduced by maximizing the use of stray capacitances of the main switches as parallel resonant capacitors. Resonance charging and discharging of the parallel capacitances allows lossless, zero voltage switching. In one embodiment, circuit component size and count are minimized while achieving lossless, zero voltage switching within a three-phase inverter.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5710698
• OSTI ID: 871337
• Country of Publication: United States
• Language: English

Related Subjects

delta
connected
resonant
snubber
circuit
snubber-based
soft
switching
inverter
achieves
lossless
dc-to-ac
power
conversion
conditioning
minimum
component
count
size
current
supplied
branches
solely
dc
supply
voltage
main
switches
auxiliary
reduced
single
semiconductor
switch
maximizing
stray
capacitances
parallel
capacitors
resonance
charging
discharging
allows
zero
embodiment
minimized
achieving
three-phase
resonant snubber
supply voltage
component count
voltage switching
power conditioning
circuit component
zero voltage
power conversion
semiconductor switch
snubber circuit
resonant capacitors
soft switching
parallel resonant
circuit achieves
minimum component
dc supply
delta connected
voltage switch
lossless switching
achieves lossless
dc-to-ac power
inverter circuit
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