Controller for AC generator
First Claim
Patent Images
1. A system comprising:
- a generator configured to generate an AC signal, the generator comprising;
a stator, wherein an outer peripheral surface of the stator is axially crenellated with a predetermined number of teeth and slots;
an output terminal electrically coupled to a fusible link;
an electrically conductive phase ring coupled to the fusible link; and
a pole phase coil conductor, electrically coupled to the phase ring and to a winding of insulated wiring disposed around at least one of the teeth of the stator; and
a control system coupled to the generator, the control system responsive to at least one phase of the AC signal from the generator, the control system for generating control signals to a switching rectifier to generate a regulated DC signal, the control system comprising;
a zero crossing detector, responsive to a first signal representative of the AC phase, for generating indicia of zero crossings in the AC phase;
a variable ramp generator, responsive to a second signal representative of the AC phase and the indicia of zero crossings, for generating a ramp signal indicative of the time integral of the voltage of the AC phase accumulated from the occurrence of a zero crossing and reset upon the occurrence of the next successive zero crossing; and
a trigger generator, responsive to the time integral ramp signal and a reference signal indicative of a desired firing angle to maintain a set DC output, for generating the control signals to the switching rectifier in accordance with a comparison of the time integral ramp signal to the reference signal.
0 Assignments
0 Petitions
Accused Products
Abstract
A control system that can accommodate the wide variations in the output of a generator, such as a permanent magnet alternator, while providing an output with relatively uniform phase ripple. The control system includes a zero crossing detector and variable ramp generator for generating control signals to a switching rectifier to generate a regulated DC signal.
-
Citations
26 Claims
-
1. A system comprising:
-
a generator configured to generate an AC signal, the generator comprising;
a stator, wherein an outer peripheral surface of the stator is axially crenellated with a predetermined number of teeth and slots;an output terminal electrically coupled to a fusible link; an electrically conductive phase ring coupled to the fusible link; and a pole phase coil conductor, electrically coupled to the phase ring and to a winding of insulated wiring disposed around at least one of the teeth of the stator; and a control system coupled to the generator, the control system responsive to at least one phase of the AC signal from the generator, the control system for generating control signals to a switching rectifier to generate a regulated DC signal, the control system comprising; a zero crossing detector, responsive to a first signal representative of the AC phase, for generating indicia of zero crossings in the AC phase; a variable ramp generator, responsive to a second signal representative of the AC phase and the indicia of zero crossings, for generating a ramp signal indicative of the time integral of the voltage of the AC phase accumulated from the occurrence of a zero crossing and reset upon the occurrence of the next successive zero crossing; and a trigger generator, responsive to the time integral ramp signal and a reference signal indicative of a desired firing angle to maintain a set DC output, for generating the control signals to the switching rectifier in accordance with a comparison of the time integral ramp signal to the reference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
Specification