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DC-TO-400HZ INVERTER

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
6753
Program Year/Program:
1988 / SBIR
Agency Tracking Number:
6753
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
NDT TECHNOLOGIES, INC.
1726 Ellington Road P.O.Box 637 South Windsor, CT 06074 2739
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1988
Title: DC-TO-400HZ INVERTER
Agency: NASA
Contract: N/A
Award Amount: $49,997.00
 

Abstract:

NDT TECHNOLOGIES, INC. HAS RECENTLY DEMONSTRATED THE FEASIBILITY OF A SIMPLE, LIGHTWEIGHT, HIGH-EFFICIENCY POWER CONDITIONING MODULE. THE MODULE IS VERY VERSATILE AND CAN BE USED AS A BUILDING BLOCK FOR A WIDE VARIETY OF APPLICATIONS SUCH AS: FOUR-QUADRANT BI-DIRECTIONAL DC-AC INVERSION, LINE VOLTAGE REGULATION, UNINTERRUPTIBLE POWER SUPPLIES, ACTIVE POWER FILTERING, DC ISOLATION, POWER FACTORCOMPENSATION, AND FOUR-QUADRANT BI-DIRECTIONAL VOLTAGE/FREQUENCY CONVERSION. FURTHERMORE, IN MANY CASES, USE OF THE MODULE CAN ELIMINATE HEAVY AND EXPENSIVE LOW-FREQUENCY TRANSFORMERS AND OTHER INDUCTIVE SYSTEM COMPONENTS. IN PARTICULAR, THIS NEW MODULE APPEARS WELL-SUITED AS A DC-TO-400HZ INVERTER. THE PRESENT PROTOTYPE USES CLAMP-DIODE SWITCHING, WHICH, DUE TO THE REVERSE REDOVERY CHARACTERISTICS OF DIODES, CAUSES CERTAIN PROBLEMS. THESE PROBLEMS INCLUDE EMI/RFI, HIGH SWITCHING STRESSES AND UNNECESSARILY HIGH SWITCHING LOSSES. TO REMEDY THESE SHORTCOMINGS, IT IS PROPOSED TO REPLACE THE PRESENT CLAMP-DIODE SWITCHING APPROACH WITH A QUASI-RESONAMT SWITCHING SCHEME. QUASI-RESONANT SWITCHING ALLOWS SWITCHING FREQUENCIES UP TO THE MEGA-HERTZ RANGE. ITOFFERS MANY ADVANTAGES, SUCH AS: LOW EMI/RFI, LOW SWITCHING STRESSES AND SWITCHING LOSSES, EXTREMELY HIGH POWER DENSITIES AND, THEREFORE, EXTREMELY LIGHTWEIGHT AND COMPACT POWER CONDITIONING MODULES.

Principal Investigator:

Dr herbert r weischedel

Business Contact:

Small Business Information at Submission:

Ndt Technologies Inc
150 Strong Rd Po Box 637 S Windsor, CT 06074

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No