US 12,149,151 B2
Permanent magnet generator brakes with press slip fit
Aaron Cooling, Rockford, IL (US); Glenn C. Lemmers, Jr., Loves Park, IL (US); and Andreas C. Koenig, Rockford, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Feb. 3, 2023, as Appl. No. 18/105,457.
Prior Publication US 2024/0266912 A1, Aug. 8, 2024
Int. Cl. H02K 7/102 (2006.01); H02K 7/18 (2006.01); H02K 11/21 (2016.01); H02K 11/26 (2016.01)
CPC H02K 7/102 (2013.01) [H02K 7/1823 (2013.01); H02K 11/21 (2016.01); H02K 11/26 (2016.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
a permanent magnet generator (PMG) with a generator shaft defining a longitudinal axis;
a brake system, wherein the brake system includes a brake shaft with a first end operatively connected to the generator shaft for selectively rotating with the generator shaft or braking to slow the generator shaft; and
a shear shaft operatively connected to a second end of the brake shaft axially opposite the first end along the longitudinal axis, the shear shaft being configured for connection to a prime mover for rotation of the generator shaft, and being configured to rotate together with the prime mover and with the brake shaft under normal conditions, and to disconnect the prime mover from the brake shaft if subjected to a predetermined torque;
wherein the brake system includes:
a press fit sleeve engaged about the brake shaft; and
an actuator operatively connected to actuate a pawl between a first position spaced apart from the press fit sleeve for normal operation of the PMG, and a second position engaged with the press fit sleeve to apply braking forces to the press fit sleeve and to the generator shaft.