Generator disconnect couplings

1. A disconnect coupling, comprising:

a drive member for a generator;

an input member being rotationally engaged with the drive member and having a ramp extending circumferentially about the input member;

an actuator member mechanically engagable with the input member such that rotation of the input member while the actuator member is mechanically engaged with the input member causes the input member to move axially away from and to thereby rotationally disengage from the drive member; and

a controller operably connected to the actuator member and configured to move the actuator member between the disengaged position and the engaged position based upon rotational position of the input member or upon toll of a delay interval.

2. The disconnect coupling as recited in claim 1 , wherein the controller is configured to receive a disconnect command, receive a rotational angle of the input member, compare the input member rotational angle with a target disconnect angle range, and determine whether the input member rotational angle is within the target disconnect angle range, and determine whether to disconnect the input member from the drive member based on the comparison of the input member rotational angle and the target disconnect angle range.

3. The disconnect coupling as recited in claim 1 , further comprising a rotational position sensor connected to the controller and configured to provide a signal with input member rotational position to the controller.

4. The disconnect coupling as recited in claim 1 , further comprising an actuation module connected between the controller and the actuator member to move the actuator member between the disengaged position and engaged positions upon receipt of a disconnect command.

5. The disconnect coupling as recited in claim 1 , wherein the controller includes:

a disconnect command lead;

a synchronization block connected to the disconnect command lead;

a delay block connected to the disconnect command lead; and

an operator block connected to the synchronization block and the delay block to provide a disconnect command received from the synchronization block or the delay block to an actuation module operably connected to the actuator module based on input member rotational angle or upon toll of a delay interval.

6. The disconnect coupling as recited in claim 1 , wherein the controller is configured to delay disconnection when the input member rotational angle is outside of the target disconnect angle range, and disconnect the input and drive members when the input member rotational angle is within the target disconnect angle range.

7. The disconnect coupling as recited in claim method as recited in claim 1 , wherein the controller is configured to delay disconnection when the input member rotational angle is outside of the target disconnect angle range, and disconnect the input member from the drive member after toll of a delay interval.

8. The disconnect coupling as recited in claim 1 , wherein the actuator member is frictionally engaged to the input member in an engaged position.

9. The disconnect coupling as recited in claim 1 , wherein the actuator member is disconnected from the input member in a disengaged position.

10. The disconnect coupling as recited in claim 1 , further comprising a reduction gear arrangement mechanically coupled to the drive member for providing mechanical rotation to the input member.

11. The disconnect coupling as recited in claim 1 , further comprising a gas turbine engine mechanically coupled to the drive member to provide mechanical rotation to the input member.

12. A generator arrangement, comprising:

a stator having windings;

a rotor having one or more permanent magnets, bars, and/or windings supported for rotation relative to the stator; and

a disconnect coupling as recited in claim 1 , wherein the rotor is seated about the input member and the input member is movable therein.