Motor for Direct Drive of Electric Wheelchair

Abstract

Described in the paper is analysis of properties of synchronous motor with outer permanent magnets rotor. The motor, having an atypical construction, is powered by low voltage from a three phase frequency converter. It is suitable as a drive unit for direct power drives of small electric vehicles and electric wheelchairs. Theoretical analysis of the synchronous motor with outer permanent magnets rotor starts with the air gap space configuration. The present paper describes the main results from open-circuit and load simulation. The section of paper describes the mechanical construction of prototype of the synchronous machine. Experimental results of measurements of the machine prototype in the generatoric and motoric mode are described. Experimental measurements verified stability of the motor parameters at its loading.

Thermal diagnostic systems and their application for analysis of transformer winding

“…These methods possible to localize places of faults and it can also serve for the diagnosis and detection of disorders in material quality and other anomalies during operation of the equipment [15], [16].…”

Analysis of the PM Motor with External Rotor for Direct Drive of Electric Wheelchair

“…Main results of the electromagnetic and construction design of synchronous motor with permanent magnets on external rotor is described in paper [8]. For the design and electromagnetic calculations of PMSM, the basic equations and information were used referring to [9][10][11][12][13][14][15].…”

“…The analytical design is validated by means of comparison to FEM simulations [8]. It was used in 2D FEM simulation that compared with 3D simulation needed a much shorter time to be calculated [16][17][18][19].…”

“…It was used in 2D FEM simulation that compared with 3D simulation needed a much shorter time to be calculated [16][17][18][19]. In the paper [8] The electromagnetic torque can be expressed as follows:…”

“…in the Clarke-Park's d-q model. In this synchronous reference frame, the PMSM with PM rotor is generally described by the following set of equations [8][9]:…”