Engine architecture using electric machine

• US 10,669,950 B2
• Filed: 04/20/2017
• Issued: 06/02/2020
• Est. Priority Date: 02/25/2013
• Status: Active Grant

• Current Assignee: Pratt & Whitney Canada Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Pratt & Whitney Canada Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Dooley, Kevin A.
• Primary Examiner(s): Nguyen, Viet P
• Application Number:
  US15/492,521
• Publication Number:
  US 20170218855A1
• Time in Patent Office: 1,139 Days
• CPC Class Codes: F01D 15/10 Adaptations for driving, or combinations with, electric generators
• CPC Class Codes: F02C 7/06 Arrangements of bearings bearings F16C; Lubricating of turbo machines F01D25/18; of machines or engines in general F01M
• CPC Class Codes: F02C 7/22 Fuel supply systems
• CPC Class Codes: F02C 7/275 Mechanical drives
• CPC Class Codes: F02C 9/48 Control of fuel supply conjointly with another control of the plant with nozzle section control F02K1/17
• CPC Class Codes: F05D 2220/76 an electrical generator
• CPC Class Codes: F05D 2270/52 by electrical means, e.g. relays or switches
• CPC Class Codes: H02K 16/04 Machines with one rotor and two stators
• CPC Class Codes: H02K 2213/06 Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• CPC Class Codes: H02K 7/1823 structurally associated with turbines or similar engines
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

There is described an oil and fuel control system and method for an engine. The system comprises an electric machine having a single rotor coupled to a dual channel stator comprising a first stator and a second stator, for operating as a motor to generate motive power; a dual channel motor drive unit coupled to the electric machine; a dual channel full authority digital engine control (FADEC) coupled to the dual channel motor drive unit; an oil delivery system comprising an oil pump and oil accessories, coupled to the single rotor of the electric machine; and a fuel delivery system comprising a fuel pump and fuel accessories, coupled to the single rotor of the electric machine.

Claims

1. An oil and fuel control system for an engine, the system comprising:

an electric machine having a single rotor coupled to a dual channel stator comprising a first stator and a second stator, for operating as a motor to generate motive power;

a dual channel motor drive unit coupled to the electric machine, the motor drive unit having a first motor drive channel coupled to the first stator and a second motor drive channel coupled to the second stator;

a dual channel full authority digital engine control (FADEC) coupled to the dual channel motor drive unit;

an oil delivery system comprising an oil pump and oil accessories, coupled to the single rotor of the electric machine, and driven by the motive power from the electric machine operating as a motor via the first motor drive channel of the dual channel motor drive unit; and

a fuel delivery system comprising a fuel pump and fuel accessories, coupled to the single rotor of the electric machine, and driven by the motive power from the electric machine operating as a motor via the second motor drive channel of the dual channel motor drive unit, wherein the fuel delivery system is driven by controlling a fuel delivery speed from the fuel pump, and the oil delivery system is controlled as a function of the fuel delivery speed.

2. The oil and fuel control system of claim 1, wherein the first stator is electrically independent from the second stator.

3. The oil and fuel control system of claim 1, further comprising a dual channel power control unit coupled to the dual channel motor drive unit and adapted to modulate an amount of torque provided to the fuel pump and the oil pump as a function of a fuel delivery speed.

4. A method for controlling oil and fuel in an engine, the method comprising:

operating as a motor an electric machine to generate motive power, the electric machine having a single rotor coupled to a dual channel stator comprising a first stator and a second stator;

driving an oil delivery system with the motive power from the electric machine via a first motor drive channel of a dual channel motor drive unit coupled to the first stator, the oil delivery system comprising an oil pump and oil accessories; and

driving a fuel delivery system with the motive power from the electric machine via a second motor drive channel of the dual channel motor drive unit coupled to the second stator, the fuel delivery system comprising a fuel pump and fuel accessories;

the dual channel motor drive unit coupled to a dual channel full authority digital engine control (FADEC) configured for controlling the electric machine via the dual channel motor drive unit, wherein the fuel delivery system is driven by controlling a fuel delivery speed from the fuel pump, and the oil delivery system is controlled as a function of the fuel delivery speed.

5. The method of claim 4, wherein the first stator is electrically independent from the second stator.

6. The method of claim 4, further comprising modulating an amount of torque provided to the fuel pump and the oil pump as a function of a fuel delivery speed using a dual channel power control unit coupled to the dual channel motor drive unit.