The present invention provides a system and method for controlling the hill hold assist system incorporated in an electric three-wheeler vehicle. Particularly the present invention discloses a feature that prevents rollback of an electric three wheeler vehicle on an incline by providing a boost to the vehicle while the user switches between the brake and acceleration pedals. The hill hold mode assist in maintaining a limited torque and speed of car in the direction selected by the user for a set period of time as the user switches from the brakes to the acceleration pedal. Once the user presses the accelerator, it releases the "Hill Hold" Mode.
The present invention provides a lightweight control strategy for implementing the creep control function in an electric three-wheeler vehicle. Particularly, the present invention discloses a feature that provides assistance in navigating the vehicle through crowded area while the user switches between the brake and acceleration pedals. The creep mode assists in maintaining a limited torque and speed of car in the direction selected by the user without pressing the acceleration pedal. Once the user presses the accelerator, it releases the Creep Mode.
The present invention describes a clamping device and a tensional system wherein the pulley bearing arms, rotational bearing and spring are all merged into a single contiguous element (to be called the Monolithic Flexure) which allows a smaller design envelope while achieving the performance characteristics desired of belt tensioners. The monolithic flexure designed, works as a clamping device on the belt and is used to provide the necessary tensioning force on the belt. The use of this monolithic-flexure based clamping device, as a belt tensioner, is one embodiment of this design. Flexures are elements that incorporate dimensional variation across sections of elastic materials to be relatively compliant in selective degree(s) of freedom, but relatively stiff in the complimentary degree(s) of constraint. Flexure based systems are advantageous in reducing part counts in assemblies by eliminating conventional joints and hence requirement of conventional bearings.
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 compensate 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.
F02N 11/00 - Starting of engines by means of electric motors
B60K 6/445 - Differential gearing distribution type
B60W 20/10 - Controlling the power contribution of each of the prime movers to meet required power demand
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors
B60K 6/26 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
B60K 6/365 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
Disclosed in the present invention is a dual-structured power output apparatus of an electric drive and power system that provides a means for outputting both mechanical power and electrical power. It comprises dual motor/generators having two stator assemblies, two rotor assemblies and a power transmission unit all integrated into a single housing for easy mounting. The power transmission unit is disposed adjacent to the two motor/generators and coupled on both ends to rotating shafts mechanically linked to the rotor assemblies such that they are rotatable relative to each other. It function is to change the rotational speed and torque of at least one of the rotors in order to reduce weight and physical size of the apparatus, and thus significantly improving the power density and capability. The structure of the apparatus is well-suited to improve the performance and fuel efficiency of the prior art hybrid powertrain.
B60W 20/13 - Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limitsControlling the power contribution of each of the prime movers to meet required power demand in order to prevent overcharging or battery depletion
B60W 10/08 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
B60K 6/365 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts
B60W 20/40 - Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
B60K 6/445 - Differential gearing distribution type
F16H 37/08 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts with differential gearing
H02K 16/00 - Machines with more than one rotor or stator
B60L 11/12 - with additional electric power supply, e.g. accumulator
B60L 11/14 - with provision for direct mechanical propulsion
B60L 11/18 - using power supplied from primary cells, secondary cells, or fuel cells
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60L 7/14 - Dynamic electric regenerative braking for vehicles propelled by AC motors
B60K 6/26 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
B60W 10/115 - Stepped gearings with planetary gears
B60K 1/02 - Arrangement or mounting of electrical propulsion units comprising more than one electric motor
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
6.
Induction motor-permanent magnet generator tandem configuration starter-generator for hybrid vehicles
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.
F16H 48/30 - Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means
H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors
F02N 11/00 - Starting of engines by means of electric motors
B60W 20/10 - Controlling the power contribution of each of the prime movers to meet required power demand
B60K 6/445 - Differential gearing distribution type
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
F02N 15/08 - Gearing between starting-engines and started enginesEngagement or disengagement thereof the gearing being of friction type
Disclosed in the present invention is a shaft construction for motor-generators and alternators that provides effective airflow and improved overall cooling without the need for an external fan. The shaft comprises a plurality of circumferentially disposed centrifugal fan blades and longitudinal cooling channels. As the shaft rotates, the centrifugal fan blades pull the air inwardly across the winding end-turns on one end of the stator into the housing and propels the air at high pressure through the cooling channels along the shaft to cool the rotor inner circumferential surfaces, winding end-turns on the other end of the stator and bearings mounting surfaces, and exhausts through the exhaust vents on the ends of the housing. The airflow path provides effective cooling of the stator windings, rotor, shaft and bearings that prevents high temperature gradients, thus resulting in improved motor-generator performance.
H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
F04D 17/16 - Centrifugal pumps for displacing without appreciable compression
F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
F04D 29/58 - CoolingHeatingDiminishing heat transfer
H02K 16/00 - Machines with more than one rotor or stator
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
8.
AN ELECTRIC OR HYBRID VEHICLE USING MOTOR-GENERATOR HAVING SHAFT WITH CENTRIFUGAL FAN BLADES FOR COOLING
Disclosed in the present invention is a shaft construction for motor-generators utilized in conventional combustion engines, electric and hybrid vehicles and alternators that provides effective airflow and improved overall cooling without the need for an external fan. The shaft comprises a plurality of circumferentially disposed centrifugal fan blades and longitudinal cooling channels. As the shaft rotates, the centrifugal fan blades pull the air inwardly across the winding end-turns on one end of the stator into the housing and propels the air at high pressure through the cooling channels along the shaft to cool the rotor inner circumferential surfaces, winding end-turns on the other end of the stator and bearings mounting surfaces, and exhausts through the exhaust vents on the ends of the housing. The airflow path provides effective cooling of the stator windings, rotor, shaft and bearings that prevents high temperature gradients, thus resulting in improved motor-generator performance.
B60K 6/20 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Disclosed in the present invention is a shaft construction for motor-generators and alternators that provides effective airflow and improved overall cooling without the need for an external fan. The shaft comprises a plurality of circumferentially disposed centrifugal fan blades and longitudinal cooling channels. As the shaft rotates, the centrifugal fan blades pull the air inwardly across the winding end-turns on one end of the stator into the housing and propels the air at high pressure through the cooling channels along the shaft to cool the rotor inner circumferential surfaces, winding end-turns on the other end of the stator and bearings mounting surfaces, and exhausts through the exhaust vents on the ends of the housing. The airflow path provides effective cooling of the stator windings, rotor, shaft and bearings that prevents high temperature gradients, thus resulting in improved motor- generator performance.
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.
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.
B60K 6/40 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
12.
Dual-structured electric drive and power system for hybrid vehicles
Disclosed in the present invention is a dual-structured power output apparatus of an electric drive and power system that provides a means for outputting both mechanical power and electrical power. It comprises dual motor/generators having two stator assemblies, two rotor assemblies and a power transmission unit all integrated into a single housing for easy mounting. The power transmission unit is disposed adjacent to the two motor/generators and coupled on both ends to rotating shafts mechanically linked to the rotor assemblies such that they are rotatable relative to each other. It function is to change the rotational speed and torque of at least one of the rotors in order to reduce weight and physical size of the apparatus, and thus significantly improving the power density and capability. The structure of the apparatus is well-suited to improve the performance and fuel efficiency of the prior art hybrid powertrain.
B60K 6/365 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
B60K 6/26 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
B60W 20/00 - Control systems specially adapted for hybrid vehicles
F16H 37/08 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts with differential gearing
B60K 6/28 - Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts
B60K 6/445 - Differential gearing distribution type
H02K 16/00 - Machines with more than one rotor or stator
B60L 11/12 - with additional electric power supply, e.g. accumulator
B60L 11/14 - with provision for direct mechanical propulsion
B60L 11/18 - using power supplied from primary cells, secondary cells, or fuel cells
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60L 7/14 - Dynamic electric regenerative braking for vehicles propelled by AC motors
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
13.
A DUAL-STRUCTURED ELECTRIC DRIVE AND POWER SYSTEM FOR HYBRID VEHICLES
A dual-structured power output apparatus of an electric drive and power system provides a means for outputting both mechanical power and electrical power. It comprises dual motor/generators (70, 80) having two stator assemblies (20, 30), two rotor assemblies (60, 50) and a power transmission unit (40) all integrated into a single housing (11) for easy mounting. The power transmission unit (40) is disposed adjacent to the two motor/generators (70, 80) and coupled on both ends to rotating shafts (61, 51) mechanically linked to the rotor assemblies (60, 50) such that they are rotatable relative to each other. The power transmission's function is to change the rotational speed and torque of at least one of the rotors (60, 50) in order to reduce weight and physical size of the apparatus, and thus significantly improving the power density and capability. The structure of the apparatus is well-suited to improve the performance and fuel efficiency of the prior art hybrid powertrain.
B60K 1/02 - Arrangement or mounting of electrical propulsion units comprising more than one electric motor
B60L 11/14 - with provision for direct mechanical propulsion
B60W 10/08 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
patents
