Accession Number:

AD0600377

Title:

PERFORMANCE AND ANALYSIS OF SONAR TRANSMITTER USING PARALLEL INVERTER UNIT,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1964-04-08

Pagination or Media Count:

44.0

Abstract:

A solid-state sonar transmitter using silicon-controlled rectifiers in a parallel inverter circuit has been developed. The transmitter has an output power of three kilowatts, with an efficiency of 85 to 90 percent at low audio frequencies. An ac equivalent circuit for the parallel inverter and load combination has been analyzed to obtain equations for inverter input resistance, commutation ratio, and peak voltage. The equivalent circuit assumes that the inverter components are lossless and that the input current is constant. The transmitter was used to drive a 36-element array of variable-reluctance transducers which have a resonant frequency of 960 cycles per second. The distorted driving voltage from the inverter circuit did not adversely affect the acoustic performance of the projector array. Comparison of the measured and calculated performance of the inverter circuit indicates that the ac model gives sufficiently accurate results to allow prediction of inverter performance with a known load. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE