Abstract: Provided is a method of manufacturing high strength synthetic fibers, and high strength synthetic fibers manufactured using the same. More particularly, the method involves a localized heating process by raising the temperature of a molten spinning fiber to a temperature higher than that of a pack body during a short period of time with no degradation through a heating zone located in the immediate vicinity of capillary in the spinning nozzle, so as to effectively control the molecular entanglement structure in the molten polymer without reducing the molecular weight and thus to enhance the drawability of the as-spun fibers, thereby improving the mechanical properties of the as-spun fibers, such as strength, elongation, etc., using the existing processes of melt spinning and drawing and thus enabling a mass production of a high-performance fiber at low cost.

Abstract: Disclosed is a control method for a motor of an electronic brake. The control method for a motor of an electronic brake includes: a stop mode-starting step of starting a stop mode when a vehicle is stopped by a brake; an electrical angle-measuring step of measuring an electrical angle of a motor providing pressure to the brake in the stop mode; an electrical angle-calculating step of calculating a changed electrical angle using a predetermined electrical angle change and the electrical angle of the motor measured in the electrical angle-measuring step; and a motor-controlling step of controlling a current flowing to the motor in accordance with the changed electrical angle. Therefore, it is possible to keep a vehicle stopped, prevent a high current from flowing at any one phase of the motor, and prevent the motor from burning.

Abstract: Provided is a method of manufacturing high strength synthetic fibers, and high strength synthetic fibers manufactured using the same. More particularly, the method involves a localized heating process by raising the temperature of a molten spinning fiber to a temperature higher than that of a pack body during a short period of time with no degradation through a heating zone located in the immediate vicinity of capillary in the spinning nozzle, so as to effectively control the molecular entanglement structure in the molten polymer without reducing the molecular weight and thus to enhance the drawability of the as-spun fibers, thereby improving the mechanical properties of the as-spun fibers, such as strength, elongation, etc., using the existing processes of melt spinning and drawing and thus enabling a mass production of a high-performance fiber at low cost.

Abstract: A motor initialization method for an electric booster brake system may include: determining, by a control unit, whether a key on signal of a vehicle is inputted; turning on a warning light and determining a battery voltage state of the vehicle, when the key on signal is inputted; and performing a motor initialization mode according to the determined battery voltage state.

Abstract: Provided are a motor control apparatus controlling a motor including a stator and progressing or retreating a screw so that pressure is formed in a piston provided in a brake for braking a vehicle, and an operation method thereof and the motor control apparatus includes: the motor including a rotor with a permanent magnet and a coil forming an electromagnetic field; an encoder outputting an encoder pulse and a reference pulse to correspond to rotation of the motor; and an electronic control unit controlling the motor based on the encoder pulse and the reference pulse of the encoder, wherein the location of the rotor is determined based on the encoder pulse and the reference pulse input from the encoder when the motor rotates by forcibly rotating the motor to control the motor when the motor starts, thereby starting the motor when the hall sensor is abnormal or even though the hall sensor is not provided by controlling the motor.

Abstract: The present invention provides a method of detecting solenoid valve failure of a vehicle electric brake booster, the method including: a) driving the motor so that the piston moves forward until the piston closes at least the cut-off hole in a state in which the solenoid valve is locked; b) measuring pressure in the master cylinder in a state in which the piston is moved forward; c) determining whether the pressure in the master cylinder which is measured in step b) exceeds a predetermined reference value; and d) determining that the solenoid valve is in a failure state when the pressure in the master cylinder which is measured in step b) is the predetermined reference value or less, to detect failure of the solenoid valve only by a software control change, thereby providing an advantageous effect that secures braking safety.

Abstract: Disclosed is a control method for a motor of an electronic brake. The control method for a motor of an electronic brake includes: a stop mode-starting step of starting a stop mode when a vehicle is stopped by a brake; an electrical angle-measuring step of measuring an electrical angle of a motor providing pressure to the brake in the stop mode; an electrical angle-calculating step of calculating a changed electrical angle using a predetermined electrical angle change and the electrical angle of the motor measured in the electrical angle-measuring step; and a motor-controlling step of controlling a current flowing to the motor in accordance with the changed electrical angle. Therefore, it is possible to keep a vehicle stopped, prevent a high current from flowing at any one phase of the motor, and prevent the motor from burning.

Abstract: Disclosed is a method, including: urgently putting a brake on a vehicle; detecting current values for at least two phases among phases of a motor which operates at a current which is out of a current measurable range through the urgently putting of a brake; comparing the current value detected in the detecting with a threshold value; when it is determined that there is one current value which is equal to or higher than the threshold value among the detected current values in the comparing, removing the current value which is equal to or higher than the threshold value and obtaining a current value for the remaining phase of the motor from a predetermined look-up table; and determining the removed current value using a current value which is detected through the comparing and is lower than the threshold value and the current value obtained through the obtaining.

Abstract: Disclosed is a control method of an electro-mechanical brake, including: a first step of operating a brake to stop a vehicle and generating a target pressure value of the brake; a second step of calculating an electrical angle of a three-phase motor and preparing movement of the electrical angle when the vehicle stops; a third step of checking errors of requested current and pressure; a fourth step of setting a range of the electrical angle when the current and the pressure are normal; and a fifth step of forcibly moving an actual position of the electrical angle to an adjacent electrical angle.

Abstract: Provided are a motor control apparatus controlling a motor including a stator and progressing or retreating a screw so that pressure is formed in a piston provided in a brake for braking a vehicle, and an operation method thereof and the motor control apparatus includes: the motor including a rotor with a permanent magnet and a coil forming an electromagnetic field; an encoder outputting an encoder pulse and a reference pulse to correspond to rotation of the motor; and an electronic control unit controlling the motor based on the encoder pulse and the reference pulse of the encoder, wherein the location of the rotor is determined based on the encoder pulse and the reference pulse input from the encoder when the motor rotates by forcibly rotating the motor to control the motor when the motor starts, thereby starting the motor when the hall sensor is abnormal or even though the hall sensor is not provided by controlling the motor.

Abstract: Disclosed is a method, including: urgently putting a brake on a vehicle; detecting current values for at least two phases among phases of a motor which operates at a current which is out of a current measurable range through the urgently putting of a brake; comparing the current value detected in the detecting with a threshold value; when it is determined that there is one current value which is equal to or higher than the threshold value among the detected current values in the comparing, removing the current value which is equal to or higher than the threshold value and obtaining a current value for the remaining phase of the motor from a predetermined look-up table; and determining the removed current value using a current value which is detected through the comparing and is lower than the threshold value and the current value obtained through the obtaining.

Abstract: Disclosed is a control method of an electro-mechanical brake, including: a first step of operating a brake to stop a vehicle and generating a target pressure value of the brake; a second step of calculating an electrical angle of a three-phase motor and preparing movement of the electrical angle when the vehicle stops; a third step of checking errors of requested current and pressure; a fourth step of setting a range of the electrical angle when the current and the pressure are normal; and a fifth step of forcibly moving an actual position of the electrical angle to an adjacent electrical angle.

Abstract: A motor initialization method for an electric booster brake system may include: determining, by a control unit, whether a key on signal of a vehicle is inputted; turning on a warning light and determining a battery voltage state of the vehicle, when the key on signal is inputted; and performing a motor initialization mode according to the determined battery voltage state.

Abstract: The present invention provides a method of detecting solenoid valve failure of a vehicle electric brake booster, the method including: a) driving the motor so that the piston moves forward until the piston closes at least the cut-off hole in a state in which the solenoid valve is locked; b) measuring pressure in the master cylinder in a state in which the piston is moved forward; c) determining whether the pressure in the master cylinder which is measured in step b) exceeds a predetermined reference value; and d) determining that the solenoid valve is in a failure state when the pressure in the master cylinder which is measured in step b) is the predetermined reference value or less, to detect failure of the solenoid valve only by a software control change, thereby providing an advantageous effect that secures braking safety.

Abstract: Disclosed is a method of detecting a failure of a motor of an electric brake booster. The method includes: a) determining whether the electric vehicle brake booster is in the brake pressure control mode or the motor position control mode; b) storing a first position value of the motor for each of predetermined periods when it is determined that the electric vehicle brake booster is in the brake pressure control mode; c) comparing the first position value stored for the last period among the first position values with a second position value of the motor in the motor position control mode when the brake pressure control mode is changed to the motor position control mode; and d) determining that the motor is in a locked state when the first position value and the second position value are substantially identical.

Abstract: The present invention relates to an external type regulator for a vehicle alternator, and in particular to an external type regulator for a vehicle alternator which is capable of preventing a damage of electric parts and a battery by stopping a power generation by disconnecting a field current flowing in a field coil through a relay in the case that an over charge occurs in an alternator due to a damage of a regulator.

Abstract: The present invention relates to an external type regulator for a vehicle alternator, and in particular to an external type regulator for a vehicle alternator which is capable of preventing a damage of electric parts and a battery by stopping a power generation by disconnecting a field current flowing in a field coil through a relay in the case that an over charge occurs in an alternator due to a damage of a regulator.