Electric boost of turbine engine output power and power control system
AssigneeHoneywell International Inc.
InventorsJens Gehrke, Parsa Mirmobin, Cristian Anghel, Gordon Beatty
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Abstract
The mechanical output power of a turbine engine can be electrically boosted by using a power control system which may include a power source, an electric machine, a prime mover coupled to the electric machine, and a power control module coupled to the power source and the electric machine. The power control module may be configured to operate the electric machine between a motoring mode driving a mechanical load and a generator mode supplying power to an electrical load at speeds normally associated with generating modes only.
Claims19
A power control system, comprising:
- a power source;
- an electric machine;
- an electrical load coupled to the electric machine;
- a prime mover coupled to the electric machine;
- a mechanical load coupled to the prime mover;
- and
- a power control module coupled to the power source and the electric machine, wherein
- the power control module is configured to operate the electric machine between:
- a generating mode supplying power to the electrical load, according to a power control strategy defined by equations comprising:
- φag=φfa+φsa Eq. (1):
- where φag is a flux in air-gap, φfa is a flux produced by a rotor in a stator windings of the electric machine and φsa is a flux caused by a stator current Ia
- Eag=Efa+Esa Eq. (2):
- where Eag is a voltage induced by φag, Efa is a voltage induced by φfa and Esa is a voltage drop in inductance of an armature in the electric machine, and
- Va=Eag+(Ra+(jωLa)Ia Eq. (3):
- where Va is the terminal voltage, Ra is the armature resistance, ω=angular speed, j is a complex operator, Ls is synchronous reactance and
- a motoring mode driving the mechanical load.
A method of controlling power in a hybrid vehicle that includes a traction wheel system and a rotary propeller system, comprising:
- operating an electric machine, coupled to the traction wheel system and the rotary propeller system, in a generating mode to drive the traction wheel system according to a power control strategy defined by equations comprising:
- φag=φfa+φsa Eq. (1):
- where φag is a flux in air-gap, φfa is a flux produced by a rotor in a stator windings of the electric machine and φsa is a flux caused by a stator current Ia
- Eag=Efa+Esa Eq. (2):
- where Eag is a voltage induced by φag, Efa is a voltage induced by φfa and Esa is a voltage drop in inductance of an armature in the electric machine, and
- Va=Eag+(Ra+(jωLa)Ia Eq. (3):
- where Va is the terminal voltage, Ra is the armature resistance, ω=angular speed, j is a complex operator, Ls is synchronous reactance;
- and
- operating the electric machine in a motoring mode providing increased transient power to drive the rotary propeller system according to the power control strategy, wherein the stator current (Ia) is placed at a lagging angle (α) with respect to the voltage (Efa).
A hybrid vehicle, comprising:
- a body;
- a traction wheel system coupled to the body;
- a rotary propeller system coupled to the body;
- a prime mover coupled to the rotary propeller system;
- an electric machine coupled to the prime mover;
- a power controller coupled to the electric machine and the traction wheel system, wherein the power controller is configured operate the electric machine between:
- a generating mode driving the traction wheel system, according to a power control strategy defined by equations comprising:
- φag=φfa+φsa Eq. (1):
- where φag is a flux in air-gap, φfa is a flux produced by a rotor in a stator windings of the electric machine and φsa is a flux caused by a stator current Ia
- Eag=Efa+Esa Eq. (2):
- where Eag is a voltage induced by φag, Efa is a voltage induced by φfa and Esa is a voltage drop in inductance of an armature in the electric machine, and
- Va=Eag+(Ra+(jωLa)Ia Eq. (3):
- where Va is the terminal voltage, Ra is the armature resistance, ω=angular speed, j is a complex operator, Ls is synchronous reactance and
- a motoring mode driving the rotary propeller system, wherein the motoring mode produces a higher torque from the prime mover than the generating mode.
Dependencies are inferred from the claim text.