October 14 2016

5 advantages of a direct-drive motor

TM4 offers its SUMO direct-drive powertrains for the bus and commercial vehicle markets. They represent the best compromise between efficiency and simplicity for our customers looking to electrify their commercial vehicle platforms. But why did TM4 come up with this design choice, you  may ask? When TM4 first started to develop motor and inverter systems for the commercial vehicle market, our original idea, as a company mainly involved in automotive projects, was to design a high RPM and high power…
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August 29 2016

Increasing Efficiency of Electric Vehicle Powertrain using IGBT inverters

Ultimately, one of the key to being able to optimize the hardware design and the control software of inverters acting as motor controllers is having an in depth knowledge of the design of electric motors. It is one thing to ensure that electric motors and inverters not only have the highest possible efficiency as standalone products, but to design a truly efficient powertrain system, the challenge is keeping the combined efficiency of these components at the highest level possible.

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July 19 2016

5 benefits of multi-phase motors and inverters

One question our sales representatives often get is related to TM4’s multi-phase approach; what advantages do 6- and 9-phase electric powertrains provide in comparison with more traditional three-phase systems? Let’s take a look at the top 5 benefits multi-phase systems can offer.

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May 17 2016

10 things to consider when choosing an electric motor

Selecting the right electric motor to fit a particular vehicle isn’t always straightforward. There are so many variables to consider that it can be difficult to know where to start. Given the price of batteries and electric motors, in order to find the most economical solution, you should look for a powertrain that will fit required vehicle performances as close as possible. In this article, we will overview 10 basic questions that you need to answer before attempting to find…
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May 17 2016

Electric motor topologies 101

Electric motors have been around since the 19th century and are used in a diversity of applications. They can be found anywhere, from small toys and electronics up to electric vehicles and industrial applications. Electric motors for electric vehicles are broadly classified into two categories: ASYNCHRONOUS MOTORS SYNCHRONOUS MOTORS   The choice of a traction motor technology for an electric vehicle is crucial for the design of the whole system. Many criterions such as efficiency, cost, reliability and power density must…
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