Search results for: “motor motors”

May 17, 2023

Magnets and energy: fundamental attraction?

Electric currents create magnetic fields. Moving magnets induce electric currents. These principles underpin 95% of global electricity, while 50% of wind turbines and 95% of electric vehicles use permanent magnets with Rare Earth metals. This 15-page overview of magnets explains key magnet concepts and controversies for the energy transition.
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February 1, 2023

Hillcrest: ZVS inverter breakthrough?

Hillcrest Energy Technologies is developing an ultra-efficient SiC inverter, which has 30-70% lower switching losses, up to 15% lower system cost, weight, size, and thus interesting applications in electric vehicles. How does it work and can we de-risk the technology?
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Energy storage: top conclusions into batteries?

Thunder Said Energy is a research firm focused on economic opportunities that can drive the energy transition. Our top ten conclusions into batteries and energy storage are summarized below, looking across all of our research.
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Energy of rotation: angular momentum, inertia and flywheels?

This data-file calculates the energy stored in rotating masses. This includes 50Wh – 100 kWh flywheels. In power grids, the angular momentum of large rotating generators is known as ‘inertia’ and can run from 30kWh to 30MWH per turbine. Inertia has historically been a crucial part of stabilizing grids. Hence how do the physics work?…
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Electrical conductivity: energy transition materials?

Electrical conductivity of energy transition materials is tabulated in this data-file. ‘The action’ takes place in the range of 10^-8 to 10^-3 Ohm-meters, including silver in solar cells, copper in renewables and EVs, aluminium transmission lines, batteries, and solar semiconductors.
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Capacitor banks: the economics?

This model captures the economics of power factor correction via installing capacitor banks upstream of inductive loads. A 10% IRR is derived from a system costing $30/kVAR, reducing real power losses by 0.5%, thus saving on 8c/kWh electricity prices (75% of savings), $3.5/kW demand charges (15%) and a $20/ton CO2 price (10%).
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Variable frequency drives: leading companies?

This data-file outlines the top twenty companies producing variable frequency drives to precisely control electric motors. The top three companies are European capital goods players. High-quality VFDs may protect against growing competition from China.
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