# BRUSA Presents “Unbeatable” Compact Double Traction Drive Electric Motor With 402 HP; Weighs Less Than 300 Pounds

4 years ago by Mark Kane 9Comments

Swiss company Brusa Elektronik unveiled its so-called Double Traction Drive Planetary DTDP1 electric motor.

Newsworthy here is its compactness, power and weight. The Brusa DTDP1 measures in at only 614 mm (24 inches) in total width, yet puts out 300 kW (402 hp) of power.

Since the units weighs less than 300 lbs, it’s specific power-to-weight ratio, including the gearbox, is 1 kW per pound.

Wanna get all technical? Here goes: The Brusa twin-motor drivetrain consists of two newly developed hybrid synchronous motors HSM2, each of 150 kW of peak power and 275 Nm (203 ft lbs) of peak torque and planetary reduction gearing of 7.25 to 1. **This converts to 2 x 2000 Nm (or 2 x 1,475 ft lbs) at the wheels up to speeds of 60 mph! **Moreover, both wheels are driven independently with full torque vectoring, feed from Brusa DMC534 inverters.

All this performance, coupled with its compact size and low weight, means that this unit is ideally suited for sportscar or even racers capable of speeds over 120 mph.

Do you think any OEM’s will line up for this unit? Will we soon see an electric supercar with this gear? Only time will tell.

Looks like a nice motor. The torque vectoring is a nice feature. This seems comparable to the Model S performance motor. Anyone have weight and dimensions on that package?

Wow 2 planetaries and 2 motors with around the same gear reduction as the Volt.

Sounds expensive!!

If the motors are direct shaft connected , then they could be wired in parallel. Therefore, I dont really understand the purpose of two separate motors. The motors appear to be the same physical size so i’d imagine the same speed, and planetary assumes a synergy drive arrangement…

So, more detail would be appreciated.

Two different motors mean you can direct power to the wheels independently. If used smartly it can lead to improved handling in turns, for example. Plus, there is no need for a differential.

Of course, each motor must be paired to its own planetary reduction.

The headline is not impressive of this article. The Via Motors motor is also 402 hp and is 1/3 the weight… So 300 lbs? big deal.

Yeah, I was guessing that this is a whole controller/motor/reduction gear module, like the big module on the Tesla skateboard. It’s pretty cool that someone is offering such things as a 3rd party kit, if that’s the case.

I want this in my i-MiEV! I don’t care if I would only get 10 miles of range. Those 10 miles would be FUN!

True the Via Motors motor is also 402 hp and is 1/3 the weight, but the torque is specified at 300 ft lbs while the the dual Brusa motor is specified at 2 x 1,475 ft lbs (2950 ft-lbs), that is almost 10 time the torque

@Yves

It all works out (using english units such as horsepower and footpounds)to 1800 rpm @ 1 hp = 3 foot pounds. There’s obviously some reduction gearing in the unit which probably accounts for some of the weight.. The hp is the only figure that really matters.

400 hp would be around 1200 footpounds at 1800 rpm.. If the via is only 300 then that means the motor can scream along at 7200 rpm. I never like to see a large motor go that fast. Too much strain on the pinion gear and bearings. (But in my roadster the speed is even more ridiculously fast – 14000 rpm for 125 mph).

The other thing is that Via numbers on their website are a bit suspect. Its just advertising material at this point so the torque number may not be just right.