US 9,647,582 B2 · Induction motor-permanent magnet generator tandem configuration starter-generator for hybrid vehicles

Abstract

Disclosed in the present invention is a tandem starter-generator construction that includes an induction motor-generator, a permanent magnet motor-generator and power transmission unit disposed adjacent to the motor-generators. The induction motor-generator is utilized predominantly as a motor to provide mechanical power at relatively high efficiency as a motor, and as a generator to provide electrical power during regenerative braking. The permanent magnet motor-generator is used predominantly as a generator for very high efficiency power conversion and to capture additional electrical power during regenerative braking to compensates for the regenerative energy captured at lower efficiency by the induction motor-generator. Accordingly, the tandem motor-generator construction disclosed herein overcomes the drawbacks of low efficiency of an induction motor-generator operating in regenerative mode and a permanent magnet motor-generator magnetic drag losses during periods of non-utilization at high speeds in order to improve fuel efficiency of a parallel hybrid vehicle.

Claims20

Dependent claims

An electronic device to control an accessory to a mechanical power source of a motor vehicle, the electronic device comprising:

circuitry configured to:
select one mode from a plurality of modes based on captured information including at least a current speed of the motor vehicle and a current acceleration demand of the motor vehicle, the plurality of modes including a first generation mode, a second motoring mode, and a third motoring and generation mode;
and
generate a set of one or more commands according to the selected one of the modes to control directions and magnitudes of torques applied by motor/generator assemblies of the accessory to their respective rotor shaft, wherein the set is to cause the motor-generator assemblies to perform one of:
jointly charge common energy storage device following selection of the first generation mode;
jointly discharge the common energy storage device to jointly assist the mechanical power source in driving an axle of a motor vehicle following selection of the second motoring mode;
or
one of the motor/generator assemblies to individually charge the common energy storage device and the other of the motor/generator assemblies to selectively discharge the common energy storage device to individually assist the mechanical power source in driving the axle of the motor vehicle following selection of the third motoring and generation mode.

5 more elements

A memory device having stored thereon instructions that are to control an accessory to a mechanical power source of a motor vehicle and that, in response to execution by a processing device, cause the processing device to perform operations comprising:

selecting one mode from a plurality of modes based on captured information including at least a current speed of the motor vehicle and a current acceleration demand of the motor vehicle, the plurality of modes including a first generation mode, a second motoring mode, and a third motoring and generation mode;
and
generating a set of one or more commands to cause motor/generator assemblies of the accessory to be driven and controlled according to the selected one of the modes, wherein the set is to cause the motor-generator assemblies to perform one of:
jointly charge a common energy storage device following selection of the first generation mode;
jointly discharge the common energy storage device to jointly assist the mechanical power source in driving an axle of a motor vehicle following selection of the second motoring mode;
or
one of the motor/generator assemblies to individually charge the common energy storage device and the other of the motor/generator assemblies to selectively discharge the common energy storage device to individually assist the mechanical power source in driving the axle of the motor vehicle following selection of the third motoring and generation mode.

4 more elements

Dependencies are inferred from the claim text.

Induction motor-permanent magnet generator tandem configuration starter-generator for hybrid vehicles

Life of this patent

Induction motor-permanent magnet generator tandem configuration starter-generator for hybrid vehicles

Life of this patent

Abstract

Claims20