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This paper deals with an analysis of the design parameters and its influence on performance of the linear induction motor (LIM). LIM propels using Lorentz force generated by interaction between magnetic flux of the primary and eddy current induced in secondary. As depending on the size of the primary and the secondary, not only magnetic flux and induced eddy current, but also performances of the LIM...
The air pollution have become a major social problem. The motor is applied to the traction system. The traction motor operates in wide operation range. In this paper, 120kW Concentrated winding IPMSM is presented as existing model. In the high speed, harmonics of the motor becomes large, it becomes a problem in the control side. Therefore, when designing a vehicle electric motor, it is necessary to...
AWD (All Wheel Drive) clutch is a system that allocates the part of entire driving force with the front wheel drive shaft, among the main power delivered to the rear wheel axle through the electric control of clutch system inside the transfer module. It controls the surface pressure using the change (forward and reverse direction) in the oil flow rate of clutch pack depending on the driving condition,...
This paper examines and summarizes the research trends in the field of rehabilitation robotics for treadmills that automatically adapt to the walker's desired speed. Treadmill training is a method of ambulatory rehabilitation for patients who have lost their ambulatory function before or after a joint replacement surgery, or from arthritis, a stroke, or a spinal cord injury. The existing treadmill...
This is paper on traction motor design for a Tram-Train which takes into consideration of a permanent magnet scattering. A Tram-Train is a railway vehicle that runs at the maximum speed of 70km/h in downtown area and at the maximum speed of 150km/h in-between cities. For this reason, a Tram-Train has characteristics of a wide variable speed area, requiring a traction motor design that is appropriate...
Force feedback plays a very important role in medical surgery. In minimally invasive surgery (MIS), however, long and stiff bars of surgical instruments diminish force-feedback to the surgeon. In the case of minimally invasive robotic surgery (MIRS), force-feedback is totally eliminated. Previous researchers have reported that the absence of force-feedback increased the average force magnitude applied...
This paper proposes a means to reduce torque ripple in a 2 poles, 30 (W) small size BLDC motor in radial blower. The BLDC motor have six times torque ripple interval per one period. This problem is the cause of noise and vibration that leads to the degradation of the output torque. For example, First, cogging torque is generated due to the reluctance difference of the teeth of the stator core for...
This paper proposes an optimal rotor design method of an interior permanent magnet synchronous motor (IPMSM) using a permanent magnet (PM) shape. The goal of this design is to obtain the minimum design variables of an objective function using a Box-Behnken response. To find the best design model, high torque and low torque ripple were found from electromagnetic finite element method, and safety factor...
In this paper, a novel braking mechanism is proposed to enhance the dexterity of the robot finger through a single motor. The proposed braking mechanism has very simple structure, which consists of a brake shoe and an electromagnet switch per each joint. The electromagnet switch gives a brake shoe a trigger signal for brake, the brake shoe plays an important role to induce a large braking force/torque...
In bilateral teleoperation systems, stability and synchronization have been important problems in control engineering. Several control architectures have been developed to solve these problems. In addition to them, we consider an effect of input saturation on the system. Saturation generally can destroy synchronization within the established architecture. In this paper, we propose a new control scheme...
The edge effect of the secondary reaction plate is influenced on performances of single-sided linear induction motor(SLIM). Considering shapes of the secondary reaction plate, it will be improved the thrust force of SLIM. Thickness and overhang length of reaction plate are weighty design factors for reducing the transverse edge effect. For the optimal design of secondary reaction plate of SLIM, magnetic...
This paper presents the influence of flatness of the secondary reaction plate on performance of a linear induction motor. Construction tolerance of the plate affects directly to the cost and performance of the Linear metro. Detailed simulation of the flatness has been done by using FEM.
This paper describes two kinds of the tactile sensors using the optical fiber sensors. One is the tactile sensor using fiber Bragg grating (FBG) sensor. Bragg grating inscribed in an optical fiber causes reflect of a spectral component at the Bragg wavelength. This sensor can detect external force using change of the reflective wavelength. The other is the tactile sensor using the microbending optical...
This paper describes the design and the performance results of a dexterous manipulator for minimally invasive surgery (MIS) that performs like a human arm. The design of the loadcell to measure the force of its tool-tip and its method are also presented for including a force-feedback loop in the future. Because a human whole arm has 7 degrees of freedom (DoF), we have also designed 7 DoF manipulator...
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