PATENT CLAIM ANALYSIS

Application Number: 15924562
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-07
Patent Classification: ["310", "125000"]

Abstract:
A hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.

Claim (Index 7):
A method for transitioning from induction operation at startup to synchronous operation of a hybrid squirrel cage/permanent magnet motor comprising:\n obtaining a hybrid squirrel cage/permanent magnet motor comprising:\n a motor housing; \n a stator fixed to the motor housing and producing a rotating stator magnetic field; \n a motor shaft rotatably connected to the motor housing and extending from at least one end of the motor housing for attachment to a load; \n an inner rotor rotationally fixed to the motor shaft residing coaxial with the motor shaft, the inner rotor including:\n a second rotor core; \n second electrically conductive squirrel cage bars embedded in the second rotor core; and \n flux barriers inside the second rotor core, the flux barriers guiding the rotating stator magnetic field through the second rotor core during synchronous operation; \n \n an outer rotor residing between the stator and inner rotor and coaxial with the motor shaft and not rotationally mechanically coupled to the motor shaft to rotate with the motor shaft and including:\n a first rotor core; \n inductive elements configured to cooperate with a rotating stator magnetic filed to provide torque at startup; and \n permanent magnets residing on an interior surface of the first rotor core; \n \n providing an Alternating Current (AC) signal to the stator; creating a rotating stator magnetic field inductively cooperating with the hybrid squirrel cage and permanent magnet outer rotor to create torque on the hybrid squirrel cage and permanent magnet outer rotor; beginning rotation of the hybrid squirrel cage and permanent magnet outer rotor; after the hybrid squirrel cage and permanent magnet outer rotor begins to rotate, the permanent magnets of the hybrid squirrel cage and permanent magnet outer rotor creating a second rotating magnetic field cooperating with the squirrel cage inner rotor; accelerating the hybrid squirrel cage and permanent magnet outer rotor towards synchronous engine speed; near synchronous engine speed, the hybrid squirrel cage and permanent magnet outer rotor and stator combining to form a joint rotating magnetic field; the joint rotating magnetic field inductively cooperating with the second squirrel cage bars of the squirrel cage inner rotor; the squirrel cage inner rotor approaching synchronous engine speed; and the hybrid squirrel cage and permanent magnet outer rotor and the squirrel cage inner rotor magnetically coupling at synchronous engine speed.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 90.0
- Lexical Diversity: 2.24638
- Patent Class: 310.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13689400', '13452514', '12905906', '12610184', '12851017']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9018008173894132
- 35 USC 102 Novelty (BERT): 0.5631997383150273
- Combined Prediction Score: 0.8679407094819745
- Mean Citation Score: 420.91608
- Max Citation Score: 473.43524
- Similarity Product: 411.4196058483983

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test