Patent application number | Description | Published |
20110095713 | METHOD AND SYSTEM FOR INITIATING OPERATION OF AN ELECTRIC MOTOR - Methods and systems for controlling an electric motor are provided. The motor includes a plurality of windings. Each winding is coupled to a respective set of first and second switches. The first switch of each set of switches is simultaneously activated. Current flow through the plurality of windings is measured while the first switch of each set of switches is activated. The electric motor is controlled according to a first motor control method if the measured current is below a predetermined threshold. The electric motor is controlled according to a second motor control method if the measured current is above the predetermined threshold. | 04-28-2011 |
20110288698 | METHOD AND SYSTEM FOR CONTROLLING MOTOR TORQUE IN HYBRID VEHICLES - Methods and systems are provided for motor torque control for hybrid vehicles having a motor and a communications bus. The motor torque is controlled using a first motor torque capacity if the communications bus is healthy. The motor torque is controlled using a second motor torque capacity if the communications bus is unhealthy. The first motor torque capacity has a first absolute value. The second motor torque capacity has a second absolute value that is less than the first absolute value. | 11-24-2011 |
20110288699 | METHOD AND SYSTEM FOR MOTOR TORQUE CONTROL FOR VEHICLES WHEN A CURRENT SENSOR IS NOT OPERATING PROPERLY - Methods and systems for controlling motor torque in a hybrid vehicle are provided. A current sensor provides a feedback current when the sensor is operating properly. A processor controls the motor torque using the feedback current if the current sensor is operating properly. The processor controls the motor torque using a slip value for the hybrid vehicle if the current sensor is not operating properly. | 11-24-2011 |
20130076277 | SYSTEM AND METHOD FOR CURRENT ESTIMATION FOR OPERATION OF ELECTRIC MOTORS - Methodologies and systems are provided for current estimation in electric motor. The system comprises an electric motor having sensors for sensing at least motor current, motor temperature and motor speed. A vehicle controller is coupled to the sensors and includes a closed-loop current control system for the electric motor having a current compensation circuit for providing a current compensation signal that is used to adjust a current command for the electric motor. The current compensation circuit includes a short-circuit current calculator for providing a short-circuit current value based upon the motor temperature and the motor speed, a compensation gain calculator for providing a gain compensation value based upon the motor speed, and circuitry for combining the motor current, the short-circuit current value and the gain compensation value to provide the current compensation signal. Methods for current estimation in electric motor are also provided. | 03-28-2013 |
20130334993 | METHODS, SYSTEMS AND APPARATUS FOR ESTIMATING ANGULAR POSITION AND/OR ANGULAR VELOCITY OF A ROTOR OF AN ELECTRIC MACHINE - Embodiments of the present disclosure relate to methods, systems and apparatus for estimating angular position and/or angular velocity of a rotor of an electric machine. | 12-19-2013 |
20140015468 | METHODS, SYSTEMS AND APPARATUS FOR ADJUSTING CURRENT AND/OR TORQUE COMMANDS USED TO CONTROL OPERATION OF AN ASYNCHRONOUS MACHINE - Embodiments of the present disclosure relate to methods, systems and apparatus for adjusting current and/or torque commands used to control operation of an asynchronous machine based on rotor flux of the asynchronous machine. | 01-16-2014 |
20150025720 | METHOD AND APPARATUS FOR FAULT MITIGATION IN A TORQUE MACHINE OF A POWERTRAIN SYSTEM - A powertrain system includes a torque machine rotatably coupled to an internal combustion engine via a pulley mechanism. The torque machine and the internal combustion engine are configured to transfer torque to a driveline and include a first sensor configured to monitor rotation of the engine and a second sensor configured to monitor rotation of the torque machine. The first sensor signally connects to a controller configured to control operation of the torque machine. A method for operating the powertrain system includes employing a signal output from the first sensor to monitor rotation of the torque machine to control operation thereof, said signal output from the first sensor adjusted for a pulley ratio of the pulley mechanism upon detecting a fault associated with the second sensor. | 01-22-2015 |
20150061563 | METHOD AND APPARATUS FOR MONITORING ROTATIONAL POSITION OF AN ELECTRIC MACHINE - A method for monitoring an electric motor employing a pulse-type rotational position sensor includes monitoring a signal output from the pulse-type rotational position sensor and a reference signal associated with a control signal for the electric motor. A position of a rotor of the electric motor coincident with the reference signal is determined based upon a nominal rotor position, a nominal rotational speed of the rotor and a time between the reference signal and a falling edge of the signal output from the pulse-type rotational position sensor. The electric motor is controlled based upon the position of the rotor. | 03-05-2015 |