Table of Contents
Advertisement
OM-2065 / Operation and Maintenance Manual
90SB51 / Spec. 7015-3 / Frequency Converter
Section 1. Description
1. General
The solid state converter covered by this manual is designed to provide power for maintenance and
starting of aircraft having 115/200-V AC, 3-phase, 400-Hz electrical systems. This converter unit is
identified by Specification Number 7015-3, and is manufactured by Hobart Brothers Company, Ground
Power Division, Power Systems Group, Troy, Ohio 45373. See Figure 2 for specifications and
capabilities for a basic, or stationary converter.
a. Mounting for the Solid State Converter
The Specification Number 7015-3 solid state frequency converter is designed to be mounted on a
passenger boarding bridge.
b. Advantages Offered by Solid State Converter
The solid state converter offers numerous advantages when compared to motor-generator type
power units. The main advantages are as follow:
(1) Energy Savings
Because the converter unit is a demand system, it consumes only the energy necessary and in
the amount required. If no aircraft is being serviced, no power is required, and thus none is
generated or consumed.
(2) Efficiency
The converter unit provides power to an aircraft at an efficiency of 94-95% or better, with +/-1%
voltage regulation at the aircraft. Since the unit is used in the vicinity of an aircraft being
serviced, expensive 400-Hz cabling is kept to a minimum and no external line drop
compensation is required.
(3) Longer Service
The solid state converter operates for longer periods of time without service than do
motor-generator units, as there are no parts to wear out and impair the unit's operation.
(4) Space Requirement
The converter unit is much smaller in physical size than a motor-generator unit of comparable
power output, and thus requires less space when bridge-mounted or floor-stand mounted.
(5) Lower Noise Level
The converter unit, being solid state, is much less noisy in operation than motor-generator
(rotating) equipment.
Nov 01/90
Chapter 1. Description/Operation
Chapter 1-1
Page 1
Advertisement
Table of Contents
