New Magnetless Electric Motor Promises to Change the Game in the Electric Vehicle Sector

Written by Valdemar Medeiros

Published on 13/11/2023 at 17:41

Foto: ZF

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Company Innovates With Revolutionary Electric Motor, Eliminating The Need For Rare Materials And Magnets.

ZF is innovating in the electric car sector with the development of a new electric motor, ready for mass production, that promises to be a game changer in the market. This motor stands out for dispensing with the use of magnets, a notable feature compared to current externally excited electric motors that do not utilize magnets.

ZF’s model, known as In Rotor Inductive Excited Synchronous Motor (I2SM), differs from traditional concepts by transmitting energy to the magnetic field via an inductive exciter located within the rotor shaft, representing a significant advancement in electric motor technology.

New Electric Motor Promises To Make Electric Cars More Powerful

ZF highlights its new motor as “exceptionally compact, offering the highest power and torque density”. This advanced version of an externally excited synchronous motor (FSM) emerges as a robust alternative to permanent magnet synchronous machines (PSM), which currently dominate electric vehicles.

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Advantage Of The New Electric Motor

In ZF’s view, not using rare earth materials not only saves valuable resources in production but also reduces dependencies in supply chains. Furthermore, there are no drag losses due to permanent magnets compared to PSMs. This enables better efficiency at certain operating points, such as long trips on highways at high speeds.

For the magnetic field of the rotor to accumulate via current instead of magnets, the FSM concept still generally requires sliding or brush elements in most cases, which imposes limitations: a dry installation space with additional seals is necessary, meaning it is not accessible for oil cooling.

As a result, these conventional FSMs occupy about 90 mm more axial space. Therefore, automakers typically cannot flexibly and effortlessly vary between PSM and FSM variants in their model planning. To be able to offer these synchronous machine advantages competitively, ZF has managed to offset the disadvantages associated with the design of common externally excited synchronous machines.

I2SM Does Not Use Any Brushes Or Sliding Rings

Among the offset disadvantages is the significantly increased torque density compared to the state of the art, due to the innovative rotor design for electric cars.

Due to the integration of the exciter in the rotor without impacting the installation space, there are no disadvantages in axial installation space. Furthermore, an increase in rotor power density leads to an improvement in performance.

ZF’s innovation requires energy to be transferred inductively, that is, without contact to the rotor, generating a magnetic field through coils. This means that the new electric motor does not require any brush or sliding ring elements. Additionally, it is no longer necessary to maintain a dry area with seals.

New Magnetless Electric Motor Promises to Change the Game in the Electric Vehicle Sector

Company Innovates With Revolutionary Electric Motor, Eliminating The Need For Rare Materials And Magnets.

New Electric Motor Promises To Make Electric Cars More Powerful

Advantage Of The New Electric Motor

I2SM Does Not Use Any Brushes Or Sliding Rings

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New Magnetless Electric Motor Promises to Change the Game in the Electric Vehicle Sector

Company Innovates With Revolutionary Electric Motor, Eliminating The Need For Rare Materials And Magnets.

New Electric Motor Promises To Make Electric Cars More Powerful

Advantage Of The New Electric Motor

I2SM Does Not Use Any Brushes Or Sliding Rings

A British company has installed in the middle of the ocean the world’s first floating platform that generates electricity 24 hours a day from the temperature difference between the surface and the depths of the Atlantic, without relying on wind or sun.

Great Atlantic Sargassum Belt has ceased to be a climatic phenomenon and has become a biological system that feeds on itself, with 8,000 kilometers in length, 37 million tons of algae, and scientists confirm that it is now permanent.

China is building an artificial island in the middle of the sea, covering 20 km², to construct the largest offshore airport in the world, the Dalian Jinzhouwan. This $4.3 billion project is anchored on more than 3,000 pillars embedded in the rock beneath the ocean and is scheduled to open in 2035.

A robot named Walter does the work of five bricklayers per hour and can save the construction industry, where the average age of professionals is 46 years and almost no one wants to learn the trade anymore, in the United Kingdom.

Austrian engineers have developed an inflatable concrete technology that transforms flat slabs into domes using only air pressure, eliminating scaffolding and temporary forms, and potentially changing the way bridges, tunnels, and curved roofs are constructed worldwide.

Engineers had to pour concrete mixed with tons of ice throughout entire nights in the Dubai desert to erect the Burj Khalifa; any carelessness could clog the pipes half a mile high.

The James Webb telescope spotted a planet 700 light-years from Earth with mornings full of sand clouds and nights with clear skies, the temperature difference between the two hemispheres reaches an impressive 170 degrees.

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