Ram air turbine systems
AssigneeHamilton Sundstrand Corporation
InventorsMykola Kravchenko, Robert L. Seagren
Life of this patent
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Abstract
A ram air turbine (RAT) system can include a generator configured to be turned by a RAT and to output an alternating current (AC) power, a generator control unit (GCU) configured to control an output of the generator, a rectifying module configured to rectify the AC power into a direct current (DC) power, and a DC load configured to receive the DC power from the rectifying module. The DC load can be operatively connected to the GCU to provide feedback from the DC load to the GCU. The GCU can be configured to control the output of the generator as a function of the feedback to prevent stalling of the RAT and/or doorbelling current and/or voltage in the system caused by disconnecting the generator from the DC load.
Claims18
A ram air turbine (RAT) system, comprising:
- a generator configured to be turned by a RAT and to output an alternating current (AC) power;
- a generator control unit (GCU) configured to control an output of the generator;
- a rectifying module configured to rectify the AC power into a direct current (DC) power;
- and
- a DC load configured to receive the DC power from the rectifying module, wherein the DC load is operatively connected to the GCU to provide feedback from the DC load to the GCU, wherein the GCU is configured to control the output of the generator as a function of the feedback to prevent stalling of the RAT, and/or doorbelling current and/or voltage in the system caused by disconnecting the generator from the DC load.
A control system for a generator of a ram air turbine (RAT) system, comprising:
- a generator control unit (GCU) configured to control an output of the generator and to operatively connect to a DC load to receive feedback from the DC load, wherein the GCU is configured to control the output of the generator as a function of the feedback to prevent stalling of a RAT, and/or doorbelling voltage and/or current in the RAT system.
A method for preventing doorbelling in a generator system, comprising:
- powering a DC load with a generator;
- charging a battery connected to the DC load in addition to powering the DC load such that a load threshold of the generator is exceeded during at least a portion of charging;
- and
- controlling an output AC voltage of the generator as a function of a current in the DC load to prevent doorbelling current and/or voltage in the system caused by disconnecting the generator from the DC load and battery.
Dependencies are inferred from the claim text.