Microprocessor controller for starter/generator
First Claim
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1. A controller for a starter/generator used with an engine, comprising a field winding in shunt with a free wheeling rectifier means;
- means for detecting free wheeling current in said rectifier means;
means for monitoring generator voltage and current; and
control means for controlling generator field current as a function of said monitored generator current, generator voltage and free wheeling current.
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Abstract
A controller for a starter/generator used with an aircraft engine, includes means for monitoring field return current in a generator field winding; means for monitoring generator voltage; and microprocessor control means for adjusting generator field current as a function of the field current and voltage and field return current. The field return current and output voltage monitoring functions allow for open field, field integrity, over voltage, field weakening and torque limiting functions to be realized in an integrated programmable system configuration.
64 Citations
25 Claims
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1. A controller for a starter/generator used with an engine, comprising a field winding in shunt with a free wheeling rectifier means;
- means for detecting free wheeling current in said rectifier means;
means for monitoring generator voltage and current; and
control means for controlling generator field current as a function of said monitored generator current, generator voltage and free wheeling current. - 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)
- means for detecting free wheeling current in said rectifier means;
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25. A controller for a starter/generator used with an engine, comprising means for monitoring field free wheeling current in a generator field winding;
- means for monitoring generator voltage and current;
microprocessor control means for controlling generator field current as a function of said monitored generator current, generator voltage and field current;
a field winding and a free wheeling diode shunted across said winding;
wherein said control means adjusts field current using a pulse width modulated drive signal to a field current switching device;
said control means comprising means for detecting voltage across said diode;
said control means pulsing said switching device off during a time period said switching device is otherwise on.
- means for monitoring generator voltage and current;
Specification