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US 2021/0276693 A1Published application
Propeller governor for electric synchronous thrust
AssigneeEmbraer S.A.
InventorIerko de MAGALHÃES GOMES
Life of this patent
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Abstract
A thrust propeller variable pitch actuator is controlled by a governor that uses propeller pitch as a variable to increase or decrease torque—not to maintain the propeller speed or RPM but instead to maintain certain established electric current supplied to rotate the thrust propeller.
Claims20
An aircraft control system for use with a variable pitch propeller rotated by an electric motor supplied by a supply current, the aircraft control system comprising:
- an actuator that controls the variable pitch of the propeller;
- and
- an electric circuit coupled to sense the current drawn by the electric motor and to control the pitch actuator in response to the sensed current drawn in order to vary the torque the electric motor applies to rotate the variable pitch propeller and thereby maintain the current at a set point.
In an aircraft of the type having a variable pitch propeller coupled to an electric motor supplied by a supply current, a control method comprising:
- sensing the supply current;
- and
- hydraulically controlling the variable pitch of the propeller in response to the sensed supply current to maintain the sensed supply current at a set point.
An aircraft comprising:
- a variable pitch propeller rotated by a synchronous electric motor;
- a pitch actuator configured to control the variable pitch of the propeller;
- a current sensor connected to sense current drawn by the synchronous electric motor;
- and
- a controller operatively coupled to the current sensor and configured to control the pitch actuator in response to the sensed current drawn.
2 more elements
Dependencies are inferred from the claim text.