SECTION II. EQUIPMENT DESCRIPTION AND DATA.

TM 9-2920-252-34&P

SECTION II. EQUIPMENT DESCRIPTION AND DATA.

Friction damper assembly pressure is controlled by spring

1-6. GENERATOR DESCRIPTION.

(18) within the shaft assembly.

a. General. The generator is a heavy-duty, 28 volt,

650 ampere, oil cooled, brushless, direct current type

(converting mechanical input energy to an alternating

(2) The generator is designed to an eight pole

current which is rectified within the unit to produce a direct

configuration, with salient pole, rotating field for optimum

current output) engine accessory.

performance. Two three-phase stator windings, separated

in phase relationship by thirty electrical degrees, are each

connected to a separate three phase, bridge connected

(1) The generator uses filtered oil from engine

rectifier assembly.

main gallery line for cooling. Oil circulation is provided by

a pump integral with the generator and equipped with

appropriate bypass valve to limit the oil pressure and

(3)

The drive end and anti-drive end ball

flow.

bearings (13 and 21) are sealed and permanently

lubricated.

(2) The generator is completely enclosed and

waterproof. It will continue to function properly even if

(4) The oil pump assembly (22) is located at

completely submerged in water.

the anti-drive end and is driven from the rotor shaft

through an intermediate oil pump drive shaft (20). This

intermediate shaft is driven by the rotor shaft through a

NOTE

telescoping spline drive. The intermediate shaft, in turn,

Reference

numbers

shown

is coupled to the input shaft of the oil pump with woodruff

parentheses refer to the sectional view

key (23).

of the generator (Figure 1-1).

1-7. VOLTAGE REGULATOR DESCRIPTION.

b. Construction. The generator consists of six main

a. The voltage regulator used with this

subassemblies: drive shaft assembly (19), exciter field

generator is transistorized and completely static except

assembly (9), main generator field assembly (6), main

for a circuit breaker. The circuit breaker is reset manually

generator rotor (4) and exciter rotor assembly (7), end bell

be means of an external toggle switch type lever (Figure

assembly (1), and oil pump assembly (22).

1-4).

b. The regulator is completely enclosed and

(1) Drive shaft assembly (19) consists of a

waterproof.

flexible drive shaft and a friction damper assembly.

Flexibility is obtained with a telescoping type design.

1-2