SYSTEM FOR A HYDRAULICALLY POWERED ELECTRIC GENERATOR
A system for a hydraulically powered electric generator having a hydraulic motor coupled to an electric generator. The electric generator has a field coil that provides field excitation in the rotor. The rotor also has a permanent magnet that provides initial field excitation. A voltage regulator is connected to the rotor to adjust current in the field coil to maintain a constant output voltage as generator speed and load varies.
1 . A system for a hydraulically powered electric generator, comprising:
a hydraulic pump in fluid communication with a hydraulic motor;
a brushed rotating field generator having a field coil that provides field excitation in a rotor wherein the generator is coupled to the hydraulic motor;
a permanent magnet disposed within the rotor; and
a voltage regulator attached to the rotor to adjust current in the field coil to maintain a constant output voltage as the generator speed and load vary.
2 . The system of claim 1 wherein the generator has at least one rectifier.
3 . The system of claim 1 wherein the pump is a variable speed displacement pump and a hydraulic flow control valve is connected in-line between the pump and the motor.