Abstract: A modular rotating rectifier assembly for use with a brushless self-excited, liquid cooled, dynamo electric device such as a generator. The rotating rectifier assembly is positioned in a rotating hollow shaft of the generator and is coupled with a coolant circulating system for transferring heat from the rectifier assembly to the coolant flowing therethrough. The rotating rectifier assembly is positioned inside the shaft in close proximity to a central axis, longitudinally extending through the shaft, thereby minimizing the centrifugal forces induced on the diode components of the rotating rectifier assembly.

Abstract: A switch is used to disable electrical generation by causing a short circuit in a rotating main generator field of a brushless, synchronous generator to protect against transients voltage spikes during start-up. The switch is located inside of a hollow rotor shaft of the generator. In one embodiment the switch is activated by a solenoid assembly. In a second embodiment, the switch is activated by a alternate or redundant method by oil flow through the rotor shaft.

Abstract: A modular rotating rectifier assembly for use with a brushless self-excited, liquid cooled, dynamo electric device such as a generator. The rotating rectifier assembly is positioned in a rotating hollow shaft of the generator and is coupled with a coolant circulating system for transferring heat from the rectifier assembly to the coolant flowing therethrough. The rotating rectifier assembly is positioned inside the shaft in close proximity to a central axis, longitudinally extending through the shaft, thereby minimizing the centrifugal forces induced on the diode components of the rotating rectifier assembly.

Abstract: A dynamoelectric device operable as a generator for generating electricity and as a starter motor for starting an associated primary engine in a vehicle. The generator provides 270 Volt DC power during a generating mode while the primary engine is operating and may be used to restart the primary engine in the event that the primary engine is disabled. The dynamoelectric apparatus includes a main generator having a main generator field and a main generator armature. An exciter generator is included which has an exciter armature and an exciter generator field. A rectifier assembly is coupled between the exciter armature and the main generator field. A field shorting switch is coupled to the rectifier assembly and the main generator field for selectively coupling and uncoupling the rectifier assembly during a start-up mode to protect the rectifier assembly against high voltages and voltage spikes.