• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.1021-1022
• /
• 2007

By enforcing skew of permanent magnet, detent force decreases, but lateral force that acts for vertical direction of moving direction occurs. This force deteriorates various performance of PMLSM as that acts to friction force between mover and LM guide. Therefore, in this paper, V skew model is proposed for lateral force's reduction and simulation results are compared to experimental value.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.181-182
• /
• 2007

This paper presents the system design of high speed linear synchronous machine in the required speed and thrust considering power of inverter. in this paper, the design of manufacturing motor is optimized by characteristics of motor parameters with the variation of coil turns of rotor and stator. And, the dynamic simulation are performed from the (d-q) transformation of the current and voltage and the mechanical dynamic equation composed of the mover mass and damping ratio. Finally, the results of design and analysis are verificated by finite element analysis.

• Proceedings of the KIEE Conference
• /
• 2001.10a
• /
• pp.39-41
• /
• 2001

This paper deals with a simulation and a position control for linear synchronous motor with Halbach array (HA) permanent magnet mover. We derived decouple the forces (thrust, normal force) by magnetic field modeling of the electromagnetic field analysis. The results of control simulation for HA-PM having air-core primary are calculated using M Simulink.

• Proceedings of the KIEE Conference
• /
• 2005.10c
• /
• pp.80-82
• /
• 2005

This paper presents the dynamic characteristics of a linear brushless DC(BLDC) motor with permanent magnet excitation for the precision conveyor according to the load condition. In order to investigate the accurate dynamic performance of tile linear BLDC motor driving with 6 step inverter- fed, finite element techniques coupling with external circuit models, together with the simultaneous simulation of motion of the mover system, arc proposed. The results of finite element analysis arc compared to the experimental ones.

• Proceedings of the KIEE Conference
• /
• 2005.10c
• /
• pp.132-134
• /
• 2005

The severe problem in improving the positioning precision of a permanent linear synchronous motor(PMLSM) is the large detent force caused by the PM. It is generally an undesired effect that contributes to the torque ripple, vibration and noise of machine. In this paper, the method to reduce detent force according to the mover skew is studied and analyzed using the analytical method. The analytical results are validated by finite clement analyses.

• Proceedings of the KIEE Conference
• /
• 2005.07b
• /
• pp.1153-1155
• /
• 2005

This paper deals with dynamic characteristics of LSRM according to drive condition. First, in experiment of LSRM, position of LSRM detected approximation sensor. Position choose mover of LSRM and inductance. When approved current in each phase by decided position, we made sure current and voltage according to turn-on, turn-off. Second, in dynamic characteristic of LSRM, through an experiment, we decided turn-on position of inductance profile. Also, we presented dynamic characteristic analysis model which is consisted at motor and sensor signal part, etc., and substitute circuit constant that get using magnetic equivalent circuit method, we confirmed current and voltage waveform.

• Proceedings of the KIEE Conference
• /
• 2005.07b
• /
• pp.1177-1179
• /
• 2005

This paper presents the characteristic analysis of slotless tubular type Linear DC Motor with Permanent Magnet excitation as variation of magnetic pole-pitch ratio. The stator armature winding of this motor is designed to wind at inner stator around the mover mounted with permanent magnet. First the practical model of this motor is made and its parameter is measured, after this simulation is carried out. Comparing the simulation results as variation of pole-pitch ratio, it can be seen that the reaching ability makes it useful in applications requiring a small, direct-drive actuator, which is required to extend into a specially constrained environment.

• Proceedings of the KIEE Conference
• /
• 1998.11a
• /
• pp.16-18
• /
• 1998

In this paper, a control method based on finite element analysis is presented to reduce the thrust ripple of the permanent magnet linear synchronous motor (PMLSM). In the control method, additional compensation current is added to the conventional control current according to the position of mover. The exact value of the compensation current is calculated from finite element analysis. To conform the validity of the presented method, a test set is built and experiments are performed.

• Proceedings of the KIEE Conference
• /
• 1998.11a
• /
• pp.3-6
• /
• 1998

In this paper, we evaluated the effect the tooth shape influenced against the thrust force which then was confirmed by experimentation. We analyzed the effect of by measuring static thrust force of the Phases of A and B. With this result, we found that there is an area where the thrust force abruptly decreases because the variance of the airgap permeance is very small following the positions of the stator and the mover. And the unbalance among phases showed almost equal, which means that static thrust force of the phases of A and B is very small because magnetic path of the 2-phase 8-pole HB-type is almost equal.

• 한국신재생에너지학회:학술대회논문집
• /
• 2006.06a
• /
• pp.29-32
• /
• 2006

Recently, many researches of the alternative and renewable energy have introduced due to the increasing oil price, the limited natural resources and the environmental pollution. In case of hydrogen energy, it has some merits, which can be substituted the existing the fossil fuel because of no contaminants from the combustion and the chemical reaction. We have been developing 1kW Hydrogen Linear Generator. In this paper, the thermal characteristic of this prototype linear generator has been investigated and obtained reliable analysis results comparing with experimental measurements. Especially, it is predicted that in case of 1kW, 60Hz test sample, the results satisfy with the temperature standards of H type insulation, which is shown average $69.0^{\circ}C$ temperature distribution at the coil.