Electrical generating apparatus
First Claim
1. An electrical generating apparatus comprising an alternator having an armature winding and a field winding, a rectifier for producing d.c. from the armature output of the alternator at a voltage determined by the alternator speed and the alternator field current, a rotary inverter including an armature winding, an independently rotatable field winding and switching means connecting the output of the rectifier to the armature winding in synchronism with the rotation of the inverter field winding, the inverter armature winding providing an a.c. output of amplitude and frequency dependent on the d.c. voltage and the speed of rotation of the inverter field winding, and control means for the field windings of the alternator and the inverter controlling the alternator field current in accordance with the frequency of the a.c. output of the inverter and the inverter field current in accordance with the amplitude of the a.c. output of the inverter.
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Accused Products
Abstract
A constant frequency a.c. generating system includes an alternator driven at a variable speed. A rectifier provides a d.c. supply for a rotary inverter. To maintain the voltage and frequency of the inverter output constant, the frequency is monitored and used to control the alternator field current and the voltage is monitored and used to control the inverter field current in a regulator circuit.
21 Citations
8 Claims
- 1. An electrical generating apparatus comprising an alternator having an armature winding and a field winding, a rectifier for producing d.c. from the armature output of the alternator at a voltage determined by the alternator speed and the alternator field current, a rotary inverter including an armature winding, an independently rotatable field winding and switching means connecting the output of the rectifier to the armature winding in synchronism with the rotation of the inverter field winding, the inverter armature winding providing an a.c. output of amplitude and frequency dependent on the d.c. voltage and the speed of rotation of the inverter field winding, and control means for the field windings of the alternator and the inverter controlling the alternator field current in accordance with the frequency of the a.c. output of the inverter and the inverter field current in accordance with the amplitude of the a.c. output of the inverter.
Specification