Abstract:
PURPOSE: A method is provided to prevent the disturbance of a magnetic levitation system due to the normal force of a linear induction motor by uniformly maintaining the normal for force of the linear induction motor. CONSTITUTION: A linear induction motor(20) has a initial magnetization state section, an acceleration state section, and a steady state section. A d-axis current instruction value is given as a ramp function and a q-axis current function in order to uniformly maintain the normal force. A d-axis current instruction value is given as the ramp function when the linear induction motor is initially magnetized. A d-axis current instruction value is given as the q-axis current function when the linear induction motor is accelerated.
Abstract:
PURPOSE: A method is provided to automatically control the speed and the location of a magnetic levitation vehicle by using a bar code and a bar code reader. CONSTITUTION: A current position of a vehicle is obtained with a bar code positioning system. A variable for deciding the driving direction of a vehicle is selected according to the kind of rail. A target position of a vehicle is inputted. The driving direction of a vehicle is determined according to the kind of rail. The location and speed control of a vehicle is executed from the reference location to the target position. A bar code positioning system comprises a bar code sheet(26) and a bar code reader(28). The bar code sheet is attached to the side of rail. A bar-code reader is attached to the chassis structure of a vehicle.
Abstract:
A capacitance measuring displacement sensor structure for radial active magnetic bearing and a malfunction decision method thereof are provided to improve endurance against the noise delivered from the inverter or rotor by disconnecting the power ground in which a noise passes. A capacitance measuring displacement sensor structure for radial active magnetic bearing comprises a rotor providing virtual ground, cylindrical sensor electrode surfaces(110,111,112,113) arranged apart from the surface of the rotor, a guard electrode(120) covering the sensor electrode surfaces, a signal contact surface(130) surrounding the sensor electrode surfaces and the guard electrode surface and providing the reference of measurement signal, a stator body(300) placed outside the signal contact surface, a transducer(500) blocked from the sensor electrode, the guard electrode, and the signal ground of each sensor, a magnetic bearing controller(600) controlling a magnetic bearing, and a magnetic bearing driver(800) and an electric motor driving inverter(700) for the drive of the magnetic bearing.
Abstract:
An apparatus for measuring velocity and angle of a rotator using a hole device are provided to secure stable start of permanent magnetic motor by obtaining initial start torque. Hall sensors(110, 120, 130) are joined to the stator of the electric motor by a phase difference of 120 degrees. A digital filter(200) removes a noise of output signals of hall sensors, and a phase lag circuit(210) delays the output signal of the digital filter. A forward reverse signal generator(320) generates a forward or a backward signal, and an edge circuit(400) detects the edge of the phase delay signal. The virtual z-phase signal detection unit(500) detects the virtual z-phase signal, and the virtual z phase pulse generating section(510) generates a pulse train of the virtual z phase signal.
Abstract:
A transverse flux linear actuator is provided to remove absorbing force generated in vertical to advancing direction by offsetting symmetrical absorbing force. A mover(20) moves along a stator linearly and is reciprocated inner the circle stator core(4a,4b). An absorbing force between the stator and the mover is offset on reciprocation. A ball brush coupled at certain position of the stator supports the mover while keeping a constant space between the stator core and the mover.
Abstract:
본 발명은 1차측과 2차측에 제 1 공진 수단 및 제 2 공진 수단을 더 연결하여 구성함으로써 누설 인덕턴스를 저감시키는 비접촉 변압기에 관한 것이다. 이를 위해, 1차측 권선 저항(11)과 상기 권선 저항(11)에 직렬로 연결된 1차측 누설 인덕턴스(12) 및 1차측 상호 인덕턴스(13)를 포함하는 1차측 변압기(10); 및 1차측 변압기와 자기적으로 비접촉 연결되어, 2차측 권선 저항(21)과 상기 권선 저항(21)에 직렬로 연결된 2차측 누설 인덕턴스(22) 및 2차측 상호 인덕턴스(23)를 포함하는 2차측 변압기(20)로 구성된 비접촉 변압기에 있어서, 상기 제 1 변압기(10)는 상기 1차측 누설 인덕턴스(12)를 상쇄시키는 제 1 공진 수단을 포함하여 구성되고, 상기 제 2 변압기(20)는 상기 2차측 누설 인덕턴스(22)를 상쇄시키는 제 2 공진 수단을 포함하여 구성되는 것을 특징으로 하는 비접촉 변압기를 제공한다. 비접촉 변압기, 누설 인덕턴스, 공진 수단
Abstract:
비접촉 전원 공급 장치가 개시되어 있다. 본 발명은, 1차측 누설 인덕턴스, 2차측 누설 인덕턴스, 및 자화 인덕턴스로 구성되는 비접촉 변압기와; 상기 1차측 누설 임피던스를 상쇄시키기 위해 상기 1차측 누설 인덕턴스와 직렬로 형성된 캐패시터를 포함하는 직렬 공진 회로와; 2차측의 부하 변동에 따른 일정한 출력 특정을 획득하기 위해 상기 2차측 누설 인덕턴스와 병렬로 형성된 캐패시터를 포함하는 병렬 진공 회로를 포함하여 구성되는 것을 특징으로 하여, 양질의 안정된 전원을 부하에 공급할 수 있다. 비접촉 변압기, 비접촉 전원 공급 장치, 이중 공진, 누설 임피던스
Abstract:
Disclosed herein is a horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors which is capable of linearly transporting an object in the horizontal direction and in the vertical direction using permanent magnet excited transverse flux linear motors, thereby obtaining a simple structure of the system and preventing any occurrence of dust generated by abrasion between the parts of the system. The system comprises a horizontal transportation unit and a vertical transportation unit. The horizontal transportation unit is adapted for transporting the object in the horizontal direction by means of a thrust from a permanent magnet excited transverse flux horizontal linear motor. The vertical transportation unit is installed on the horizontal transportation unit. The vertical transportation unit is adapted for transporting the object in the vertical direction by means of thrusts from permanent magnet excited transverse flux vertical linear motors.
Abstract:
PURPOSE: A combination system of a noncontact power supply unit and a permanent magnet excitation transverse flux type linear motor is provided to supply the power to a mover of the permanent magnet excitation transverse flux type linear motor by using a noncontact method. CONSTITUTION: A combination system of a noncontact power supply unit and a permanent magnet excitation transverse flux type linear motor includes a permanent magnet excitation transverse flux type linear motor and a noncontact power supply unit. The permanent magnet excitation transverse flux type linear motor includes a mover(7) including a permanent magnet, a stator core(2), and a stator coil(1) wound around the stator core(2). The noncontact power supply unit includes a transformer mover and a transformer stator. The transformer mover is formed with a transformer core(8) and the secondary coil(9) wound around the transformer core(8). The transformer stator is formed with a transformer stator core(3) and a primary coil wound around the transformer stator core(3).
Abstract:
PURPOSE: A method for controlling a traction in an independent drive type electric vehicle is provided to distribute reference torque to each motor and restrain an over-slipping phenomenon by using an independent driving method. CONSTITUTION: A driving control algorithm is formed with a driven electric vehicle or an electric vehicle model part(201) and a driving control portion(202) connected with the driven electric vehicle or the electric vehicle model part(201). A reference slip difference between a left and a right driving wheel is obtained by using a reference steering angle, a reference reentering angle, and a vehicle speed. Each practical slip ratio of the left and the right driving wheels are obtained. A practical slip difference between the left and the right driving wheels is obtained by the each slip ratio. A differential torque value is obtained by the reference slip difference and the practical slip difference. Each reference torque distribution value of the left and the right driving wheels is obtained by using the differential torque value and the reference torque value. The reference torque distribution values of the left and the right driving wheels are weakened by using a torque weakening fuzzy rule. The weakened reference torque distribution values are applied to motors for driving the left and the right driving wheels.