Patent application number | Description | Published |
20100090629 | FLUX CONTROLLED MOTOR MANAGEMENT - A motor in an electric vehicle can be controlled by receiving at least one of a user input or vehicle information, selecting one of a plurality of available flux modes using at least one of the user input or the vehicle information, and calculating a control signal, using the selected flux mode, to control the motor of the electric vehicle. | 04-15-2010 |
20100133023 | All wheel drive electric vehicle power assist drive system - A method and apparatus for an all-electric vehicle using a primary drive system and a secondary drive system is provided. While the primary drive system utilizes a single electric motor, the secondary drive system utilizes a pair of electric motors. A single electrical energy storage system (ESS) is used to supply power to both drive systems. A DC/DC converter can be used so that the two drive systems can utilize different DC bus voltage ranges. | 06-03-2010 |
20100141080 | INDUCTION MOTOR WITH IMPROVED TORQUE DENSITY - An induction motor embodiment includes a stator defining a stator bore, the stator including a stator yoke having a stator yoke thickness and a plurality of stator teeth, the teeth having a common length, with each of the stator teeth including a stator tooth center portion that extends from a stator tooth bottom portion proximal the yoke to a stator tooth tip portion, with adjacent stator teeth defining a stator slot between them, each stator slot having a stator slot bottom that extends along a stator slot bottom length. In the embodiment, the center portion has a stator tooth width that is less than or equal to one half the stator slot bottom length. In the embodiment, the stator tooth width is smaller than a stator slot opening width distance. In the embodiment, a ratio of stator yoke thickness to stator tooth width is at least 5:1. A rotor is rotably mounted in the stator. | 06-10-2010 |
20100187024 | All wheel drive electric vehicle power assist drive system - A method and apparatus for an all-electric vehicle using a primary drive system and a secondary drive system is provided. The primary drive system and the secondary drive system each utilize a single electric motor. In one configuration, a single electrical energy storage system (ESS) is used to supply power to both drive systems. A DC/DC converter can be used so that the two drive systems can utilize different DC bus voltage ranges. In another configuration, each drive system is coupled to a different electrical ESS. A bi-directional DC/DC converter can be used to provide an electrical path between each motor's inverter and the electrical ESS of the other drive system. An energy transfer control module connected to the bi-directional DC/DC converter and one or more sensors can be used to control the use of the bi-directional DC/DC converter. | 07-29-2010 |
20100187905 | All wheel drive electric vehicle power assist drive system - A method and apparatus for an all-electric vehicle using a primary drive system and a secondary drive system is provided. While the primary drive system utilizes a single electric motor, the secondary drive system utilizes a pair of electric motors. In one configuration, a single electrical energy storage system (ESS) is used to supply power to both drive systems. A DC/DC converter can be used so that the two drive systems can utilize different DC bus voltage ranges. In another configuration, each drive system is coupled to a different electrical ESS. A bi-directional DC/DC converter can be used to provide an electrical path between each motor's inverter and the electrical ESS of the other drive system. An energy transfer control module connected to the bi-directional DC/DC converter and one or more sensors can be used to control the use of the bi-directional DC/DC converter. | 07-29-2010 |
20100222953 | Dual Motor Drive and Control System for an Electric Vehicle - A method and apparatus for optimizing the torque applied by each motor of a dual motor drive system of an all-electric vehicle is provided, the torque adjustments taking into account wheel slip as well as other vehicular operating conditions. | 09-02-2010 |
20100244612 | AC MOTOR WINDING PATTERN - A motor winding arrangement that is capable of delivering relatively flat torque over a wide range of speeds, thus achieving increasing power throughout its operating range, is provided. In a multi-phase, e.g., three-phase, motor utilizing the winding arrangement of the invention, each winding layer corresponds to one phase of the motor and occupies every slot of the stator. The poles for each winding layer are comprised of concentric and non-overlapping coils. | 09-30-2010 |
20110197431 | Manufacturing Methods for a Triple Layer Winding Pattern - A method of manufacturing a triple-winding layer arrangement for a three-phase, four pole motor is provided. | 08-18-2011 |
20110198960 | Dual Layer Winding Pattern and Methods of Manufacturing Same - A dual-winding layer arrangement for a three-phase, four pole motor is provided as well as a method of manufacturing the same. | 08-18-2011 |
20110198961 | Triple Layer Winding Pattern and Methods of Manufacturing Same - A triple-winding layer arrangement for a three-phase, four pole motor is provided as well as a method of manufacturing the same. | 08-18-2011 |
20110198962 | Induction Motor Lamination Design - A high efficiency, high torque density, high speed induction motor is provided, the motor utilizing (i) stator teeth with parallel side surfaces; (ii) rotor teeth with parallel side surfaces; (iii) wide open stator slots; (iv) closed rotor slots with thick tooth bridges; and (v) deep stator and rotor slots. | 08-18-2011 |
20110198963 | Dual Layer Winding Pattern - A dual-winding layer arrangement for a three-phase, four pole motor is provided. | 08-18-2011 |
20120007532 | Rotor Temperature Estimation and Motor Control Torque Limiting for Vector-Controlled AC Induction Motors - A system and method including a runtime thermal model that estimates individual component temperatures, permitting the system to only limit power when necessary or desirable. A power-limiting system for a vector-controlled AC induction motor includes a torque command system for generating a torque command; a thermal protection system determining a runtime estimate for a temperature of a component of a rotational electro-magnetic component of the vector-controlled AC induction motor; and a controller configured to generate a motor control signal for the vector-controlled AC induction motor responsive to the torque command, wherein the thermal protection system determines the runtime estimate responsive to a multi-node thermal model of the vector-controlled AC induction motor, and wherein the controller limits a power of the vector-controlled AC induction motor to maintain a component temperature below its critical temperature. | 01-12-2012 |
20130241445 | Method of Operating a Dual Motor Drive and Control System for an Electric Vehicle - A method for optimizing the torque applied by each motor of a dual motor drive system of an all-electric vehicle is provided, the torque adjustments taking into account wheel slip as well as other vehicular operating conditions. | 09-19-2013 |
20140257613 | CONTROL SYSTEM FOR AN ALL-WHEEL DRIVE ELECTRIC VEHICLE - Electric vehicles and, more particularly, a control system for an all-wheel drive electric vehicle. | 09-11-2014 |