New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
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Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#2>The company’s permanent-magnet tech requires no rare-earth metals.
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#3Previous conversations about this same announcement:
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#410% is nothing to sneeze at but it also does not mean it is a game changer. I like the way the coil ends are described, they are 'dead' weight in a normal motor because they don't contribute to the flux but they do contribute to the resistive losses in the motor. But that 10% of the length of the winding that sits outside of the coil chambers is not responsible for 10% of the electric consumption of the motor, which is not resistive in nature in an AC drive motor.
I do like the fact that they believe they can do without a transmission entirely, if that works it will save a good bit of energy through weight reduction, mostly during acceleration and deceleration. The bit I don't get is where they talk about DC-DC conversion, most electric cars that I know something about the guts of use tri-phase AC drive.
Making this work across a wide range of scales will be an interesting challenge, in my experience increased torque comes with its own challenges (such as shafts snapping or rotors slipping on or shearing off the mounts of the shaft they are mounted on).
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#5I wonder how easy it is to manufacture comparitivly. Also I wonder how well it works to generate electricity.
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#610% is nothing to sneeze at but it also does not mean it is a game changer. I like the way the coil ends are described, they are 'dead' weight in a normal motor because they don't contribute to the flux but they do contribute to the resistive losses in the motor. But that 10% of the length of the winding that sits outside of the coil chambers is not responsible for 10% of the electric consumption of the motor, which…
From the end of the article: The company estimates that, in a large, 8-megawatt wind turbine, the HET could save 90 tons of weight, millions of dollars in costs, and lift efficiency by 3 percent. So maybe this is more about making electric motors suit their applications better and needing less support infrastructure than just looking at the % efficiency.
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#710% is nothing to sneeze at but it also does not mean it is a game changer. I like the way the coil ends are described, they are 'dead' weight in a normal motor because they don't contribute to the flux but they do contribute to the resistive losses in the motor. But that 10% of the length of the winding that sits outside of the coil chambers is not responsible for 10% of the electric consumption of the motor, which…
From the end of the article: The company estimates that, in a large, 8-megawatt wind turbine, the HET could save 90 tons of weight, millions of dollars in costs, and lift efficiency by 3 percent. So maybe this is more about making electric motors suit their applications better and needing less support infrastructure than just looking at the % efficiency.
And then there is the 'could'. So it doesn't really mean much of anything without more substantiation. Btw, the 90 tons is based on gear box driven wind turbines, but SOTA has been direct drive for many years now.
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#810% is nothing to sneeze at but it also does not mean it is a game changer. I like the way the coil ends are described, they are 'dead' weight in a normal motor because they don't contribute to the flux but they do contribute to the resistive losses in the motor. But that 10% of the length of the winding that sits outside of the coil chambers is not responsible for 10% of the electric consumption of the motor, which…
> 10% is nothing to sneeze at but it also does not mean it is a game changer.
They give a quote on a practical application:
> The resulting Segway enjoyed a 50-percent increase in range, and four times the torque, which boosted the vehicle’s top speed and allowed it to climb a steep 20-percent grade.
If that scales up linearly to electric cars, that's quite a boost.
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#910% is nothing to sneeze at but it also does not mean it is a game changer. I like the way the coil ends are described, they are 'dead' weight in a normal motor because they don't contribute to the flux but they do contribute to the resistive losses in the motor. But that 10% of the length of the winding that sits outside of the coil chambers is not responsible for 10% of the electric consumption of the motor, which…
> 10% is nothing to sneeze at but it also does not mean it is a game changer. They give a quote on a practical application: > The resulting Segway enjoyed a 50-percent increase in range, and four times the torque, which boosted the vehicle’s top speed and allowed it to climb a steep 20-percent grade. If that scales up linearly to electric cars, that's quite a boost.
That's a pretty big if. A Segway is very much not a car. The relative weight of motor + batteries is a much higher proportion of the total mass of vehicle+occupant than it is in a vehicle. So it may be a boon to lightweight electric vehicles where that is true, but the same will not hold in proportion if the vehicle were much more massive and the weight of the batteries were much more massive. And Segways are speed limited, as are most other vehicles, top speed is rarely even an issue for anything on wheels, we can go up to speeds where you have to use aerodynamics not to end up flying.
Re: New Electric Motor Could Boost Efficiency of EVs, Scooters, and Wind Turbines
#10For those wondering what a seemingly marginal difference would mean in real world examples, take a look at this video from a conference on electric aircraft design a year ago:
High Torque, Low RPM Motors – Key Enablers of Quiet Flight https://www.youtube.com/watch?v=jXd4M_pZl78