Patent application number | Description | Published |
20130328508 | METHOD FOR CONTROLLING INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR - Disclosed is a method for controlling a permanent magnet synchronous motor to maximize use of voltages of a battery by voltage phase control within weak magnetic flux area and to achieve compensation for a torque error through a torque compensator when driving the permanent magnet synchronous motor for hybrid vehicles. In particular, the method controls a permanent magnet synchronous motor so that voltage use can be maximized in a weak magnetic flux area by using voltage near maximum voltage through voltage phase control utilizing magnetic flux-based map data receiving a torque command and motor speed/batter output voltage as inputs and torque error can be compensated using a torque compensation filter when a motor constant is changed in the weak magnetic flux by a circumstance parameter, when the permanent magnet synchronous motor mounted in a hybrid vehicle and an electric vehicle is driven. | 12-12-2013 |
20140183941 | FAIL-SAFE METHOD AND APPARATUS FOR HIGH VOLTAGE PARTS IN A HYBRID VEHICLE - A fail-safe method and apparatus for high voltage parts in a hybrid vehicle is provided. In the fail-safe method, it is determined whether or not a high voltage main relay is turned off. Here, when the high voltage main relay is turned off, a voltage is charged into a direct current (DC) link using a counter electromotive force generated in a motor generator linked with a revolution of an engine. Voltage control is performed such that the voltage of the DC link is uniformly maintained using an inverter for the motor generator. | 07-03-2014 |
20140362605 | DUTY CONTROL METHOD AND SYSTEM FOR LOW VOLTAGE DC-DC CONVERTER - A duty control method for a low-voltage DC-DC converter (LDC) is provided in which a duty ratio of a high-efficiency and low-voltage DC-DC converter that has a boost converter and a full-bridge converter combined therein is variable-controlled to output low-voltage. In particular, control of a duty ratio of the LDC that includes a boost converter and a full-bridge converter or a half-bridge converter connected in series is improved and by controlling an output voltage of the full-bridge converter in a simple-equation-based variable-duty scheme to output a low voltage for high-voltage input, stable low-voltage output may be achieved over the input and output voltage range. | 12-11-2014 |
20150069953 | CHARGING SYSTEM AND METHOD OF BATTERY - A charging system and method of a battery are provided. The charging system includes a PFC (power factor correction) converter that converts alternating current input voltage into direct current input voltage and outputs the direct current voltage, and corrects a power factor. A DC-DC (direct current-direct current) converter varies the levels of direct current voltage output from the PFC converter and a battery is charged with the current output from the DC-DC converter. In addition, a controller is configured to adjust an output voltage of the PFC converter based on a charging voltage of the battery, which is varied by the charging and discharging of the battery. | 03-12-2015 |
20150145445 | SYSTEM FOR CONTROLLING MOTOR OF HYBRID ELECTRIC VEHICLE - A system for controlling a motor of a hybrid vehicle determines a current of a first axis and a current of a second axis according to a driving condition, converts the currents of the first and second axes into a 3-phase AC current, and drives the motor by applying the 3-phase AC current to the motor, and includes: a revised temperature calculation module that calculates a revised temperature in order to compensate a torque error according to counter electromotive force dispersion of the motor; and a current determination module that determines the currents of the first and second axes by substituting the corrected temperature to a current map for each temperature and by using a demand torque at a present driving condition, a present speed of the motor, and a maximum counter magnetic flux of the motor. | 05-28-2015 |
20150146467 | TWO-PHASE INTERLEAVED CONVERTER AND METHOD OF CONTROLLING THE SAME - A two-phase interleaved converter includes two sub-circuits, a voltage controller, a current controller, a balancing controller and a phase shifter. The voltage controller receives the output voltage of the two sub-circuits and outputs a signal in proportion to the level of the output voltage. The current controller receives the output signal of the voltage controller and an inductor current from one of the two sub-circuits and outputs a control signal that controls one of the two sub-circuits which is in charge of one phase. The balancing controller receives values of currents output from the two sub-circuits and calculates a difference between the values of the currents output from the two sub-circuits to control a duty ratio of the control signal applied to one of the two sub-circuits. The phase shifter shifts a phase of the control signal output from the balancing controller. | 05-28-2015 |
20150333624 | METHOD AND APPARATUS FOR CONTROLLING OUTPUT VOLTAGE - An output voltage control method and apparatus are provided. The method includes sensing output voltages of a DC-DC converter and a high-voltage battery and sensing an inductor current flowing through an inductor in a boost circuit at a front end of the DC-DC converter. In addition, the method includes varying a gain of an output voltage controller of the DC-DC converter based on a difference of the sensed inductor current with respect to an inductor current at the center point in a specified region. | 11-19-2015 |
20150333629 | MULTI-PHASE INTERLEAVED CONVERTER AND CONTROL METHOD THEREOF - A multi-phase interleaved converter includes n sub-circuits of phases, a current controller and a balancing controller. The n sub-circuits of phases have inputs connected in parallel and outputs connected in parallel in order to convert a direct current (DC) or alternating current (AC) input voltage of one level into a DC or AC output voltage of another level. The current controller receives a current control command and a phase current value of a particular sub-circuit of a particular phase among the n sub-circuits of the respective phases to output a control signal for controlling the particular sub-circuit of the particular phase. The balancing controller receives phase current values of the n sub-circuits of the respective phases and receives a control signal output from the current controller to adjust the duty ratios of control signals applied to the other sub-circuits. | 11-19-2015 |