Connectors

Choosing the most suitable type of connector for an electric vehicle subsystem is governed by a range of factors, as Rory Jackson explains.

Connectors are such vital components in vehicles that they make any explanation of their role redundant. What can be underestimated though are...

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Solar charging’s looking up

Hyundai has developed a roof-mounted solar charging system that connects directly to the powertrain of an electric vehicle (writes Nick Flaherty).

Previous roof implementations have used the energy generated to power ancillary equipment such as entertainment systems or...

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Inverter designs gain traction

ON Semiconductor has launched a family of power modules and two reference designs aimed at high-voltage automotive traction inverters (writes Nick Flaherty).

The first two VE-Trac modules are intended for main traction inverters of all types of electrically powered vehicles including battery-electric vehicles, plugin hybrids and full hybrids.

There are two inverter design platforms for...

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Superconducting aircraft motors

Power density and power-toweight ratio have always been very near the top of the list of essential attributes for aircraft propulsion systems, particularly in those elements that work at the sharp end of converting stored chemical energy into thrust (writes Peter Donaldson). Rockets aside, the gas turbine engine has yet to be beaten in this respect. In the electrified...

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Snow problem for torque software

Porsche Engineering has developed a torque control system for EVs that provides stability in environments such as snow without the need for additional sensors (writes Nick Flaherty).

An electric all-wheel-drive vehicle with multiple motors has a key advantage in allowing variable distribution of the drive power every millisecond. This compares to a conventional all-wheel-drive vehicle, where the power is...

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Cutting edge power analysis

Testing and validation of e-drives is a vital element of electric vehicle development, and Japanese manufacturer Yokogawa hopes its latest WT5000 power analyser will be a potent tool for engineers involved in such work. The manufacturer states...

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eAxles

Peter Donaldson canvasses some Tier 1 suppliers’ views on contemporary eAxle technology and the likely future trends in their design. Integrating a motor, gearing and power electronics into a compact, modular package that sits between a vehicle’s driven wheels creates a system that has come to be known as an eAxle. It is an increasingly attractive option for...

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Gearbox offers e-drive options

Drexler Automotive has developed a modular multi-speed gearbox for EVs (writes Nick Flaherty).

Working with German design house Sala Drive, the gearbox has up to 922 Nm input torque, up to 580 kW input power and optional single or dual e-motor drives on the same axle.
There is also a move to two-speed transmission powertrains to increase the...

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Battery Show North America 2019 Part 2

Rory Jackson follows up his first report from this show with further highlights of the products that were on display.

There were so many new innovations at The Battery Show – its largest to date – that we didn’t have room in our previous issue (Winter 2019) to highlight all the ones we...

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Welding

Nick Flaherty explains the pros and cons of the various welding techniques for connecting cells to form battery packs. A battery pack in an EV consists of a large number of individual battery cells that are held together mechanically and connected electrically. Making those mechanical and electrical connections poses several challenges, including the joining of multiple thin...

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