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Delta connected resonant snubber circuit

Patent ·
OSTI ID:871337
 [1];  [2]
  1. Knoxville, TN
  2. Oak Ridge, TN
+ Show Author Affiliations

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:
LOCKHEED MARTIN ENRGY SYST INC
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

References (3)

Resonant snubbers with auxiliary switches journal January 1993
The resonant DC link converter-a new concept in static power conversion journal January 1989
A rugged soft commutated PWM inverter for AC drives journal April 1992

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