Abstract: A method of calculating a motor position uses a hall sensor. The method can include determining a motor position in response to a signal change of a hall sensor installed to a motor, calculating a basic compensation value for compensating a motor position error due to signal measurement delay of the hall sensor, determining whether a current command condition for a constant-speed operation of the motor is satisfied, calculating a first-up compensation value and a first-down compensation value, calculating an average values of the deviation between d-q axes current commands, and correcting the motor position using the basic compensation value when a difference between the average values is less than a reference average value.

Abstract: A method of correcting a signal delay of a Hall sensor for an air compressor motor when the air compressor motor rotates at a high speed includes: a first step of calculating an offset angle ? from a voltage equation, to which a q-axis voltage and a d-axis voltage are applied, by performing zero current control when an inertia braking section occurs during an operation of the motor; a second step of calculating a reference offset angle ?offset of the Hall sensor and a delay time t by using an angular velocity ? at any two points in the inertia braking section by using the equation for calculating the offset angle ?; and a third step of calculating a corrected q-axis voltage and a corrected d-axis voltage through the zero current control corrected and comparing the corrected q-axis voltage and the corrected d-axis voltage with a reference error.

Abstract: A curing agent includes a polyisocyanate. The polyisocyanate is obtained by reaction of a polyester polyol and a diisocyanate. The polyester polyol has 500 to 2,000 of a weight average molecular weight and 5% to 10% of a hydroxyl group content.

Abstract: A method of controlling an air compressor motor for a fuel cell vehicle is provide. The method includes calculating a counter electromotive force constant of the air compressor motor based on a voltage and a current of the air compressor motor for the fuel cell vehicle supplying air to a fuel cell stack and a rotation speed of the air compressor motor. The method additionally includes determining whether a permanent magnet of the air compressor motor is demagnetized based on a result of comparison between the calculated counter electromotive force constant value and a pre-set counter electromotive force constant design value.

Abstract: A method for removing residual water in a fuel cell stack includes: blocking, by an air compressor, air supply to a fuel cell stack upon shutting down of fuel cell; measuring a cell voltage of the fuel cell stack while the air supply is blocked; estimating an amount of residual water in the fuel cell stack based on the measured cell voltage of the fuel cell stack; and removing, by a driving controller, the residual water in the fuel cell stack by driving the air compressor based on the estimated amount of water.

Abstract: A method for controlling a temperature of a heating element can include: measuring a temperature of the heating element using a temperature sensor; estimating a temperature of the heating element based on a heat transfer model of the heating element; calculating a variation of the estimated temperature and a variation of the measured temperature; and determining whether a failure of the temperature sensor occurs based on the calculated variation of the estimated temperature and the calculated variation of the measured temperature.

Abstract: An embodiment relates to a light apparatus comprising: a first body having an inner peripheral side and an outer peripheral side; a diffusion member disposed on the first body; a cover disposed on the first body so as to cover the diffusion member; a second body disposed between the diffusion member and the cover and comprising a lower side and a lateral side which covers the lower side; and a light source member comprising a first circuit board, which is disposed on the lower side of the second body, a second circuit board, which covers the lateral side of the second body, at least one first light source which is mounted on the first circuit board so as to face the diffusion member, and at least one second light source which is mounted on the second circuit board so as to face the inner lateral side of the cover.

Abstract: An operating method of a vehicle watchdog circuit is provided. The method includes monitoring whether communication with a vehicle controller through a preset protocol is enabled and when a communication fault does not occur by monitoring whether communication is enabled, transmitting an error detection query to the vehicle controller every preset period. A response to the error detection query is received, and an operation of the vehicle controller is monitored, and upon determining that the operation of the vehicle controller is normal, a plurality of preset reset signals are sequentially transmitted to the vehicle controller.

Abstract: A motor control method that includes: calculating an ideal position of a motor rotor based on a Hall sensor signal; calculating a current position of the motor rotor based on a rotation speed of the motor rotor; and calculating a Hall sensor offset angle as the difference between the ideal position of the motor rotor and the current position of the motor rotor.

Abstract: A system for monitoring pulse width modulation (PWM) duty operation execution for motor control, which can detect whether or not the PWM duty operation execution used for torque and speed control of a motor is performed normally within an interrupt execution timing, and perform failure diagnosis depending upon the detected result, thus enhancing stability of motor control.

Abstract: A system for monitoring pulse width modulation (PWM) duty operation execution for motor control, which can detect whether or not the PWM duty operation execution used for torque and speed control of a motor is performed normally within an interrupt execution timing, and perform failure diagnosis depending upon the detected result, thus enhancing stability of motor control.

Abstract: A control method of a motor rotation speed may include calculating a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the speed sensor, calculating a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system, and controlling an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system.

Abstract: A method for controlling a temperature of a heating element can include: measuring a temperature of the heating element using a temperature sensor; estimating a temperature of the heating element based on a heat transfer model of the heating element; calculating a variation of the estimated temperature and a variation of the measured temperature; and determining whether a failure of the temperature sensor occurs based on the calculated variation of the estimated temperature and the calculated variation of the measured temperature.

Abstract: A motor control method that includes: calculating an ideal position of a motor rotor based on a Hall sensor signal; calculating a current position of the motor rotor based on a rotation speed of the motor rotor; and calculating a Hall sensor offset angle as the difference between the ideal position of the motor rotor and the current position of the motor rotor.

Abstract: A control apparatus of a vehicle can include: a controller configured to control an operation function of the vehicle; and a power supply unit configured to supply power to the controller or to cut off power supply thereto. The power supply unit can include a) a key hold circuit storing a key hold-on/off state of the key hold circuit corresponding to a key hold function of supplying power to the controller after the control apparatus shuts down and b) a power supply determiner determining whether to supply the power to the controller.

Abstract: A coating composition may include 5 wt % to 20 wt % of a caprolactone-modified hyperbranched polyester polyol, the caprolactone-modified hyperbranched polyester polyol obtained from polyhydric alcohol including caprolactone triol, 30 wt % to 50 wt % of a first acrylic resin, the first acrylic resin having a hydroxyl group, 15 wt % to 25 wt % of a second acrylic resin, the second acrylic resin having a hydroxyl group and having a glass transition temperature higher than that of the first acrylic resin, and an extra solvent.

Abstract: An embodiment relates to a light apparatus comprising: a first body having an inner peripheral side and an outer peripheral side; a diffusion member disposed on the first body; a cover disposed on the first body so as to cover the diffusion member; a second body disposed between the diffusion member and the cover and comprising a lower side and a lateral side which covers the lower side; and a light source member comprising a first circuit board, which is disposed on the lower side of the second body, a second circuit board, which covers the lateral side of the second body, at least one first light source which is mounted on the first circuit board so as to face the diffusion member, and at least one second light source which is mounted on the second circuit board so as to face the inner lateral side of the cover.

Abstract: A method of calculating a motor position uses a hall sensor. The method can include determining a motor position in response to a signal change of a hall sensor installed to a motor, calculating a basic compensation value for compensating a motor position error due to signal measurement delay of the hall sensor, determining whether a current command condition for a constant-speed operation of the motor is satisfied, calculating a first-up compensation value and a first-down compensation value, calculating an average values of the deviation between d-q axes current commands, and correcting the motor position using the basic compensation value when a difference between the average values is less than a reference average value.

Abstract: Disclosed are a method and a system for feedback-controlling including controlling a current supply unit in a controller so that an output applied to a driving unit from the current supply unit is repeatedly turned on/off by predetermined period and duty. The method also includes feedback-controlling of an output value of the controller applied to the current supply unit from the controller so that the output of the current supply unit follows a target value. The feedback-controlling includes an integration control process and stops the integration control process in the period that the current supply unit turns off the output thereof.

Abstract: An operating method of a vehicle watchdog circuit is provided. The method includes monitoring whether communication with a vehicle controller through a preset protocol is enabled and when a communication fault does not occur by monitoring whether communication is enabled, transmitting an error detection query to the vehicle controller every preset period. A response to the error detection query is received, and an operation of the vehicle controller is monitored, and upon determining that the operation of the vehicle controller is normal, a plurality of preset reset signals are sequentially transmitted to the vehicle controller.