US 11,990,806 B2
Electric machine systems
Eric Latulipe, Ste-Julie (CA); and Richard Freer, Saint-Basile-le-Grand (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Oct. 29, 2021, as Appl. No. 17/514,661.
Application 17/514,661 is a division of application No. 16/212,802, filed on Dec. 7, 2018, granted, now 11,190,093.
Prior Publication US 2022/0052592 A1, Feb. 17, 2022
Int. Cl. H02K 29/03 (2006.01); F16H 1/22 (2006.01); H02K 7/116 (2006.01); H02K 16/02 (2006.01)
CPC H02K 29/03 (2013.01) [F16H 1/22 (2013.01); H02K 7/116 (2013.01); H02K 16/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A power transmission system comprising:
an input shaft;
an output shaft;
one or more first electric machine rotors disposed on a first rotatable shaft, said first rotatable shaft structurally separate from said input shaft and said output shaft;
a first gear directly connected to the first rotatable shaft and connected to the input shaft; and
a second gear directly connected to the first rotatable shaft and connected to the output shaft, the one or more first electric machine rotors being disposed between the first gear and the second gear, said first and second gears configured to rotate at a same rotational speed and in a same rotational direction as said first rotatable shaft;
a second electric machine rotor disposed on a second rotatable shaft structurally separate from said first rotatable shaft, said input shaft and said output shaft;
a third gear directly connected to the second rotatable shaft and coupled to the input shaft; and
a fourth gear directly connected to the second rotatable shaft and coupled to the output shaft, said third and fourth gears configured to rotate at a same rotational speed and a same rotational direction as said second rotatable shaft, the first and second rotatable shafts having parallel rotation axes.