Patent application number | Description | Published |
20090112384 | Startup sequence control method of fuel cell-super capacitor hybrid electric vehicle - The present invention provides a startup sequence control method of fuel cell-super capacitor hybrid electric vehicles, which can protect a fuel cell at the time of the starting of the fuel cell, reduce the start-up time and promote convenience of a driver in a fuel cell-super capacitor serial hybrid system which does not employ a high-voltage power converter. The startup sequence control method comprises the steps of: determining whether or not a low-voltage auxiliary battery is in a state where its voltage is less than a reference voltage or in a cold start condition after a key-on signal has been input; if the auxiliary battery is in the state where its voltage is less than a reference voltage or in the cold start condition, matching the voltage of a main bus terminal to the voltage of an auxiliary power source through the voltage boost of a power converter; turning on a relay for cutting off the voltage of the auxiliary power source and a main relay of a precharge unit for the auxiliary power source; and turning off the power converter and then driving a fuel cell auxiliary component using the auxiliary power source to thereby boost a fuel cell voltage. | 04-30-2009 |
20110025241 | SENSORLESS CONTROL METHOD OF HIGH PERFORMANCE PERMANENT MAGNET SYNCHRONOUS MOTOR DURING EMERGENCY OPERATION - The present invention provides a position sensorless control method of a high performance permanent magnet synchronous motor during emergency operation, which can accurately detect a magnetic pole position of the synchronous motor based on a position sensorless vector control using an adaptive observer configured based on a permanent magnet synchronous motor model. | 02-03-2011 |
20110029172 | APPARATUS AND METHOD FOR CONTROLLING MOTOR POSITION AND CREEP OF ELECTRIC VEHICLE - The present invention provides an apparatus and method for controlling motor position and creep of an electric vehicle, in which when a running vehicle is stopped, motor position control for maintaining the vehicle in the stopped position even when a brake pedal is released is performed, and then creep torque control is performed such that the vehicle is prevented from rolling backwards and suddenly starting when the vehicle is restarted after a stop on a slope. | 02-03-2011 |
20140015457 | SYSTEM AND METHOD FOR CALIBRATING OFFSET OF MOTOR RESOLVER - Provided is a system and method for calibrating an offset of a resolver in a motor of a vehicle. More specifically, a current is applied to the −d-axis of the motor, the Vq, Vd, Iq, and Id of the motor is measured and a power input to the motor is calculated by a controller, and when the input power is not within a predetermined range, the controller adjusts the offset of the resolver to a positive or negative value accordingly. | 01-16-2014 |
20140167658 | METHOD OF CONTROLLING AIR BLOWER OF FUEL CELL VEHICLE - A system and a method of controlling a blower of a vehicle. The method includes detecting, by a controller, a turning of a key to an off position of the vehicle. In addition, the controller is configured to detect whether a high voltage DC-DC converter and a high voltage battery are normally operated in response to detecting the turning of the key to an off position. Regenerative energy generated by a regenerative brake operation of the blower is transmitted by the controller through two different paths based on whether the high voltage DC-DC converter and the high voltage battery are normally operated. | 06-19-2014 |
20150188168 | VOLTAGE SYNCHRONIZATION METHOD AND SYSTEM - A voltage synchronization method and system are provided. The system includes a main controller that is configured to determine whether voltage synchronization is possible. When the voltage synchronization is determined to be possible, the main controller is configured to transmit a voltage synchronization command to a plurality of auxiliary controllers. The plurality of auxiliary controllers are configured to adjust sensed voltages based on an output voltage of a fuel cell stack when the transmitted voltage synchronization command is received. | 07-02-2015 |
20150249419 | SYSTEM AND METHOD FOR CONTROLLING INVERTER - A method and system for controlling an inverter for operating a motor are provided. The method includes reducing a switching frequency of the inverter for applying a load current to the motor when the motor is used for energy consumption. Reduction of the switching frequency of the inverter enhances damage prevention and durability of the inverter. In the method, an operation mode of the inverter for operating the motor is determined based on a command received from an upper-level controller. When the operation mode of the inverter is determined to be an energy consumption mode, a switching frequency of the inverter is decreased relative to the switching frequency in a general operation mode. | 09-03-2015 |
20150345500 | MOTOR TORQUE CONTROL METHOD, APPARATUS, AND COMPUTER READABLE MEDIUM FOR AIR BLOWER - A motor torque control method for an air blower may include: setting a phase current command value of a motor of the air blower based on a temperature of the motor, calculating a d-axis current command value other than zero in compliance with the set phase current command value, and outputting the calculated d-axis current command value. | 12-03-2015 |