Jump to content
Sign in to follow this  
dfelt

Industry News: Twice the Torque, Three Times Power Density, Linear Labs Electric Motors

Recommended Posts

Revolution most commonly starts in the heart of what is to be disrupted. In this case, oil country is where one of the most revolutionary new motor designs is coming from. The minds at the University of Texas in Dallas, Dr. Babak Fahimi and the Renewable Enery and Vehicular Technology Laboratory brings us this new startup "Linear Labs Inc. A Smart Electric Motor Company" who just completed their funding round to allow them to market and produce their flagship motor, the Hunstable Electric Turbine motor.

Currently today's electric vehicle has a high revving horsepower motor with low torque, as an example you can find many electric motors that produce 50 horsepower at 10,000 rpm with 26 lb-ft of torque. The Hunstable Electric Turbine motor produces that same 50 horsepower at 1,300 rpm with 200 lb-ft of torque thus eliminating the need for a gear box as well as other components which in turn reduces cost and complexity.

 

image.png

The Hunstable motor while eliminating geared reduction thus being useful for direct drive applications retains the capability to perform at extremely high speeds and maintains maximum efficiency throughout the loading curve.

Let's get into the technical chops of the Hunstable Electric Turbine (HET) motor.

  • Permanent magnet circumferential flux 4 rotor motor
  • 3D magnetic structure produces four active torque producing areas all with the same polarity
  • 30% reduced use of copper in the coil
  • Maximum torque production from all magnetic field interactions
  • Reduced motor size due to patented unique design requires no unproductive open spaces
  • Large Lorentz Force that peaks with a large reluctance force. Best way to explain this is to quote their website: " by extending the length of the magnetic tunnel region, the torque that is present throughout the coils travels without regard to the coils at pole face length. Unlike existing conventional machines where torque is only present at an optimum point as it approaches a magnetic pole, the HET has no single optimum point but rather all positions exhibit maximum torque. The torque and force will exist while the coil in in the tunnel, regardless of tunnel length.

The-Technical-Chops.png

Traditional electric motors have always had a current pulse from the three phase supply requiring a timed rotation that allows for optimum torque production at a single instant in time where only a single phase is active. Electronics have been used to manipulate and soften the pulsations to some degree to gain performance as seen by the current leading EV manufacturers.

The HET motor is able to use a different approach due to the large force presented. One could talk about coils, poles and phases but the end result is that the the technology used by the HET Motor allows for all phases produced to create a continuous pulse of power. These power pulses overlap rather than being sequential thus eliminating torque pulsations ending with maximum torque production.

The HET Motor has an advantage that no other electric motor can equal and that is that via software control, the phases can be controlled into particular patterns allowing for true variable pole count ending in adjustable speed / torque development. To quote Linear Labs: "This allows a speed change increase with no changes in frequency, current or voltage level, which makes an electronic transmission possible."

HET-Transmission.gif

Current electric motors use what is called Field Weakening. This is where one has peak torque at 0 RPM but trades torque for speed as it goes faster. Excitation speed increases as torque drops by weakening the magnetic fields.

Induction motors increase speed by reducing this excitation current, permanent magnet motors inject an opposing current to control this which is known as a D axis current injection. The constant horsepower region is what this area of speed increase is called. Torque being traded for speed, but total horsepower does not change.

Efficiency drops off in the uses as stated above and this is what the HET motor addresses with its revolutionary design. To quote Linear Labs: " By slightly rotating a single side rotor, an axial magnetic component is introduced. This weakens , as far as the coils are concerned, the total magnetic field experienced by the coils. The degree of field weakening controls the trade-off between torque and speed.

For the first time in electric machine history, as the HET Motor enters the Constant Horsepower Region, core losses drop and overall efficiencies actually climb."

At this time you would not be blamed for saying "SO WHAT" what does this get me?

The benefits of this revolutionary new motor or as Linear Labs likes to call it their electric turbine is the following list:

  • Magnetic Configuration producing 100% more torque than any other design.
  • Efficiency, reduced copper losses resulting in reduced on-board energy storage.
  • Power, testing has shown that the HET motor with standard cooling produces continuous and peak power at 1.9 kW and  2.7 kW at a base speed of 3000 RPM superseding any other commercially available electric propulsion unit.
  • Cost and Compactness, resulting in less cost of on-board electronics, converters, controllers, etc.
  • Thermal Management, superior design due to less copper and what is known as end windings that contribute nothing to torque or output giving you superior efficiency.
  • Variable speed applications, perfect for low speed constant use but also for high speed applications.
  • Acoustic Noise, HET motors being smaller than current commercial counterparts along with limited torque pulsation provides a quiet drive system removing most noise heard by the human ear.

Some of the markets that are ripe for Linear Labs motors are of course the auto industry, HVAC industry, industry manufacturing, pretty much any market where constant and variable electric motors are being used. This results in potential energy conservation on a large scale.

Linear Labs see's the potential benefits from scooters, to drones, motorcycles, cars and trucks. The uses of their HET Motor will revolutionize the world while contributing to energy conservation.

 


View full article

Share this post


Link to post
Share on other sites

Join the conversation

You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  



  • Social Stream

  • Similar Content

    • By Drew Dowdell
      Drivers in Europe can now place deposits for Volkswagen's new ID.3 all electric vehicle.  This is the car that Volkswagen expects to compete with the Tesla Model 3 in the compact EV space. The target starting price for the ID.3 is under €30,000 which translates to $33,585 at the time of this writing. Initial vehicles offered will be special edition ID.3 1st. With an initial run of 30,000 vehicles, the ID.3 1st starts around €40,000 ($44.803) and comes equipped with voice control, navigation system, larger wheels.  There is also an ID.3 1st Plus that ads IQ Light and bi-color design while a Max adds a panoramic glass roof and an advanced heads-up display. 
      The 3 in the name ID.3 marks the vehicle's importance to Volkswagen's history as the most important vehicle after the Beetle and Golf, and also signifies the ability for VW to expand the ID brand in either direction.
      The entry level ID.3 can travel up to 205 miles on a single charge while mid-grade can go 261 miles and top-line models get as far as 342 miles. 
      Volkswagen expect production to start in late 2019 with initial deliveries happening in mid-2020. No word yet on when the model will hit US shores.


       
       

      View full article
    • By Drew Dowdell
      Drivers in Europe can now place deposits for Volkswagen's new ID.3 all electric vehicle.  This is the car that Volkswagen expects to compete with the Tesla Model 3 in the compact EV space. The target starting price for the ID.3 is under €30,000 which translates to $33,585 at the time of this writing. Initial vehicles offered will be special edition ID.3 1st. With an initial run of 30,000 vehicles, the ID.3 1st starts around €40,000 ($44.803) and comes equipped with voice control, navigation system, larger wheels.  There is also an ID.3 1st Plus that ads IQ Light and bi-color design while a Max adds a panoramic glass roof and an advanced heads-up display. 
      The 3 in the name ID.3 marks the vehicle's importance to Volkswagen's history as the most important vehicle after the Beetle and Golf, and also signifies the ability for VW to expand the ID brand in either direction.
      The entry level ID.3 can travel up to 205 miles on a single charge while mid-grade can go 261 miles and top-line models get as far as 342 miles. 
      Volkswagen expect production to start in late 2019 with initial deliveries happening in mid-2020. No word yet on when the model will hit US shores.


       
       
    • By Drew Dowdell
      The European car market as a whole has been in decline for six consecutive months as of March 2019 with 19 out of 27 markets posting declines.  March numbers were down 3.6 percent over the same month in 2018.  Looking at the first quarter of 2019 paints an even bleaker picture with only 6 countries recording growth.
      While overall demand is down, the demand for electric vehicles grows. The sales of EVs exceeded 100,000 units for the first time ever with a total of 125,400 EV and PHEVs sold.  That is an increase of 31%, mostly in Germany, Norway, Spain, and the Netherlands.  Much of that growth is attributed to the Tesla Model 3 entering the market and becoming Europe's top selling electric car.  Model 3 sales jumped from 3,747 units in February to 15,755 units in March. It was also the best selling premium mid-size car in the EU. 
      Diesel on the other hand is facing continuing losses. Registrations of new diesels have moved from 44.8 percent of all registrations in March 2017 to 31.2 percent of all registrations in March 2019. Analysts expect diesel to continue to fade as more cities put in diesel bans and stricter emissions regulations come into effect. 

      View full article
    • By Drew Dowdell
      The European car market as a whole has been in decline for six consecutive months as of March 2019 with 19 out of 27 markets posting declines.  March numbers were down 3.6 percent over the same month in 2018.  Looking at the first quarter of 2019 paints an even bleaker picture with only 6 countries recording growth.
      While overall demand is down, the demand for electric vehicles grows. The sales of EVs exceeded 100,000 units for the first time ever with a total of 125,400 EV and PHEVs sold.  That is an increase of 31%, mostly in Germany, Norway, Spain, and the Netherlands.  Much of that growth is attributed to the Tesla Model 3 entering the market and becoming Europe's top selling electric car.  Model 3 sales jumped from 3,747 units in February to 15,755 units in March. It was also the best selling premium mid-size car in the EU. 
      Diesel on the other hand is facing continuing losses. Registrations of new diesels have moved from 44.8 percent of all registrations in March 2017 to 31.2 percent of all registrations in March 2019. Analysts expect diesel to continue to fade as more cities put in diesel bans and stricter emissions regulations come into effect. 
    • By Drew Dowdell
      Google has released an update for the Google Maps Navigation app when searching for Electric Vehicle charging locations. Now when a user searches for a charging location, the app will show how many ports are currently in use out of the total in real time. This way, the driver no longer needs to physically check the location to see if charging is available without a wait.  It will also give information like charge port type, charge speed, and ratings from other drivers. 
      The feature works with ChargeMaster, EVgo, SemaConnect, and Chargepoint."  At the moment, Tesla Supercharging is not yet compatible with the feature.  Searching is available on Android, iOS, Desktop, and Android Auto. Availability in Android Auto means that drivers of cars equipped with Android Auto now have real time charging information available directly on their car's infotainment system. 
      The feature is available now on the latest version of the apps. 
  • My Clubs

  • Reader Rides

About us

CheersandGears.com - Founded 2001

We ♥ Cars

Get in touch

Follow us

Recent tweets

facebook

×
×
  • Create New...