Hiroshi Takami

Mass reduction and propulsion control for a permanent-magnet linear synchronous motor vehicle

This paper deals with fundamental research on a new container transport system utilizing a permanent-magnet (PM) linear synchronous motor (LSM), and proposes a concept of mass reduction and propulsion control for container transfer operation. By applying the repulsive lift force in the PM LSM, a large percent of vehicle weight is compensated for, and it needs less thrust force to propel the vehicle. An experiment which involved propelling the test vehicle by reducing its weight by about 85% was conducted successfully.

Mass-reduction and propulsion control of PM LSM test vehicle for container transportation

This paper proposes a new concept of mass-reduction and propulsion control for container transportation, which is based on the theory of combined levitation-and-propulsion control. The permanent magnet linear synchronous motor (PM LSM) test vehicle is propelled simultaneously, together with controlling successfully the equivalent vehicle-weight reduced by about 85%.

Levitation and propulsion motion control in a new PM LSM controlled-repulsive Maglev vehicle

This paper proposes a new repulsive-Maglev vehicle in which a vertical type PM linear synchronous motor can levitate and propel simultaneously, independently of the vehicle speeds. Levitation-and-propulsion control experiments suppressing actively the pitching motion by adaptive zero-phase-current control are also proposed.

Position and speed observer in Marine-Express model train ME03 by EKF compensating for space-harmonic EMF's

This paper presents a new high-performance observer system based on the extended Kalman filter (EKF) which can compensate for space-harmonic components of speed EMF in sensing the position and speed of a Marine-Express model train ME03. The simulation for shuttle motion is presented in the mass-reduced-mode in which the vehicle weight is reduced from 47 kg to 7 kg. This study provides one of the most important key-technologies in practical LSM Maglev systems.

Decoupled-control of levitation and propulsion in underwater LM car MEO2

The Marine-Express (ME) which is an amphibious superconducting Maglev train can run both on land and under the water. A unique method for levitation and propulsion for the ME which can be applied independently of train speeds has been proposed. The method is based on a new combined levitation-and-propulsion due to lift and thrust forces of linear synchronous motor (LSM) and can be carried out by the decoupled-control method proposed here. ME02 is the second experimental model of a unique LSM car designed to travel underwater based on the new theory. ME02 is a simulator for the ME running on land and underwater. The decoupled-control method is verified from dynamics simulations in ME02.

Propulsion control experiments in mass-control mode of an underwater travelling Marine-Express model vehicle ME02

A unique linear synchronous motor (LSM) vehicle ME02 is designed to travel underwater based on the theory of new combined levitation and propulsion for the Marine-Express. This paper presents a stable underwater-propulsion-control experiment in a mass-control made where the vehicle is sustained by guide-rollers. In this mode, ME02 vehicle can run with guide-rollers contacting with the LSM guideway both in repulsive-mode and in attractive-mode by controlling the lift force to be a required value. Laboratory experiments have shown that ME02 vehicle had been controlled successfully to run underwater in the mass-control mode by applying the decoupled-control method of lift and thrust forces.

Lateral running control for air-suspended hybrid linear motor vehicle

Air-suspended hybrid linear motor vehicle is driven by linear motor (LM) and levitated by air-suspension. The vehicle is driven by single-sided linear induction motor (SLIM) in flat and gentle slope sections of the guideway, and driven by linear synchronous motor (LSM) in steep slope section. To realize a contactless motion control of air-suspended hybrid LM vehicle, lateral motion must be controlled without mechanical guidance. Air-suspended hybrid LM vehicle has special LMs for lateral guidance motion control. The special LMs enables continuously lateral running along the reaction plate constructed in the lateral direction. This paper presents the lateral running control on the lateral reaction plate for air-suspended hybrid LM vehicle. Experimental results show that the vehicle can be propelled in lateral direction stably

FEM Dynamics Simulation of Controlled-PM LSM Maglev Vehicle

The Maglev vehicle can be driven without wheels and with minimizing levitation power losses, by using a long-stator type linear synchronous motor (LSM) with controlled permanent-magnets (PM’s), which has the integrated functions of LSM propulsion and attractive-mode levitation1. To reduce costs of the long-stator armature rails, it is practically important to simplify constructing the rails2.