Elaphe Propulsion Technologies, Ltd.

Elaphe Pogonoske Tehnologije, D.o.o.

Elaphe Pogonske Tehnologije D.o.o.

Gorazd Lampic

Gorazd Gotovac

Martin Strojnik

Andrej Detela

Urban Medic

Borut Obrul

Tomaz Motaln

A voltage balanced winding for a stator of an electric machine with a high number of pole pairs is distributed over several circumferential sections and several radial layers of the stator. The winding consists of at least two phases and each phase of the winding comprises a plurality of conductor segments, one conductor segment for each layer in each sector. Each of the conductor segments comprises a plurality of straight conductor portions arranged in an axial direction of the stator and a plurality of end-windings connecting the straight conductor portions to a wave pattern. The voltage balanced winding is characterized in that the plurality of conductor segments is divided into branches of series connected conductor segments, wherein each branch includes at least D conductor segments selected from D different sections d and D different layers j such that (j+d) mod D equals a predefined number, with D being the number of circumferential sections. At least a first conductor segment of layer j1 and sector d1 and a second conductor segment of layer j2 and sector d2 with j1+d1=j2+d2 are integrally formed as an uninterrupted conductor segment.

Voltage balanced winding pattern for an electric machine with a minimal number of connections and method for assembly of such winding

The invention refers to a mechanical design for a simple and accurate to assemble in-wheel electric motor comprising at least stator, rotor plate, rotor tube, bearing system and brake system arranged in such a way that rotor plate is attached to the rotor tube and to the bearing system and where the opening of the rotor tube and stator is on at least one axial side larger than the largest braking system or bearing system part. Brake system and bearing system parts and attachment points are accessible when rotor plate and outer parts of brake system, bearing system and the rim are removed. The rim is a separate part of the rotor plate and rotor tube. The rotor plate attachment to the bearing system is done in parallel to the rim attachment and is preventing loosening up. On at least one of the flanges there is an edge with its height smaller than the smallest radial cranny between the rotor tube and the stator.

In-wheel electric motor

The invention is the compact multiphase wave winding of a high specific torque electric machine The invention is the compact multiphase wave winding () of the electric machine. Winding () is filling the slots () of the stator ferromagnetic core () and comprise one or multiple layers (). Winding () fills the slots (). Winding comprise N or a multiple on N conductors (), where N represents the number of winding phases. Conductor () comprises or is assembled by parallel straight segments () and winding overhangs (). Between the two straight segments () of one conductor () there are N teeth () and N&#x2212;1 slots () or N+1 teeth () and N slots (). Straight segments are connected by winding overhangs which shape in tangential axial plane differs for less than one sixth of magnetic period () from ellipse shape with one axis equal to half of magnetic period () and other axis length between half and three quarters of magnetic period () length.

Compact multiphase wave winding of a high specific torque electric machine

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Ljubljana, Slovenia

Gorazd Lampic