If you do not need speed, just torque.
We have the experience of changing the electric locomotive.
Before the changes, he pulled 5 wagon.
After the changes - 11.
They need not only to pull, but also to begin to pull, which is more difficult.
Every motor application needs torque and speed to do any work. The tradeoff between torque and speed is just a matter of changing gearing.
The only description on the website that I have found is this:
Donetsk: tests of electric locomotive "Era". After the modification instead of 5 cars "Era" pulls 11 cars.
There is not enough information there to conclude anything. The new motor might simply be bigger.
It did not use a wheel-hub motor, but an electric motor using the same technology.
The same technology is what... an induction motor? Of course, that's the least expensive, longest-established, and most readily available type of motor. The website talks about a patented winding pattern, but it also claims that Duyunov invented the induction motor (which was actually invented about 130 years ago), so what is really being built is not so clear.
In gearboxes there is a loss of energy, which is not in wheel-hub motor.
Yes, but the loss of efficiency of gearing is small compared to the increase in weight, bulk, and cost of the much larger motor needed without gearing.
But I think we need to count each case separately.
wheel-hub motor is just an example of the application of technology
you can make any electric motor
Yes, there are many motor configurations and applications... already proven in production. What is this company offering which is special? Certainly not the induction motor type - that's the oldest form of AC motor, the most common in industrial use, and used by many failed electric vehicle companies (and one that has built a lot of cars and not gone bankrupt yet, but has never made a dollar of profit).
If a specific stator winding design (a combination of star-wired and delta-wired stator windings) is the technology, then meaningful comparisons would be between induction motors of common winding configurations and this new winding design... not between an induction motor and a BLDC motor.
I'm sorry if my tone seems very negative, but I have little tolerance for people claiming to have achieved something new and better, when in fact they are just selling the same thing as is already available, and counting on the ignorance of buyers. Perhaps there is some value to this company's products (if there are any real products, rather than just projects and promises), and it is just not being communicated clearly due to language issues.
In another video (
https://www.youtube.com/watch?v=EVvzJcFCQQo) for apparently the same inventor and motor, there is a claim that asynchronous (induction) motors are used everywhere industry, except in vehicles. I think Tesla Motors would disagree! It also blames the lack of "power electronics" (inverters) for the lack of asynchronous (induction) motors in vehicles; the several makers of suitable controllers would disagree with that one. These claims and some technical illustration are followed by an incoherent rant.
It would certainly help to replace some awkward translations with more common terminology:
- motor-wheel -> hub-motor
- asynchronous motor -> induction motor
- engine -> motor (when referring to an electric motor)
- moment -> torque (when referring to motor output)
