Nissan Unveils Pivo Concept Electric Vehicle
30 September 2005
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| The Pivo EV |
Nissan Motor unveiled Pivo, an electric car concept, in partnership with renowned Japanese artist Takashi Murakami at the company’s Nissan Ginza Gallery in downtown Tokyo.
Pivo, which Nissan will show at the upcoming Tokyo Motor Show, features an innovative cabin that revolves 360 degrees, eliminating the need to reverse. Thanks to its compact body, the car is also exceptionally easy to maneuver.
Pivo is powered by Nissan’s high-performance lithium-ion battery and Super Motor, used in its X-Trail fuel cell vehicle (FCV) prototype, and the Effis FCV commuter car concept shown at the 2003 Tokyo Motor Show among others.
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| Cutaway of the dual-rotor Super Motor. Click to enlarge. |
The Super Motor features dual rotors on both the inside and outside of a single stator, and can output power through two shafts under the application of a compound current. To avoid torque interference between the rotors, magnets having different numbers of pole pairs are used for the inner and outer rotors.
The Super Motor offers greater power density than conventional motors, but also increased heat generation. To address that issue, Nissan engineers placed the cooling system in between the stator teeth.
The Super Motor controls the power output of each shaft separately, making it possible to drive the right and left wheels independently, and is targeted for a variety of applications, including in fuel cell vehicles or as a generator in hybrid vehicles.
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Could someone explain to me how the super motor works to drive, say , two wheels if the outer motor has a torque of 140 N*m and the inner one 70 N*m? If you're feeding the motor a `compound current' from one inverter, then how to you make the power to the wheels the same? Wouldn't you have to spin the 140 N*m motor half as fast or have some kind of gearing b/t the wheel and the motor?
-mt
Posted by: marshall | 30 September 2005 at 05:33 PM
That is a very funny looking car! You'll never catch me in something like that.
Posted by: Schwa | 01 October 2005 at 02:15 AM
thats outrageous even for a prototype, really adds weight to the whole "big auto makes ev's fail by making them look silly" conspiracy
Posted by: NickF | 01 October 2005 at 04:52 PM
And no visible place for a sack of groceries.
Posted by: nordicnomad | 01 October 2005 at 07:13 PM
Concept vehicles are mostly exercises in sculpture rather than engineering. These things are never meant to be mass produced therefore no need for grociery bag space.
Posted by: tom | 03 October 2005 at 02:17 PM
Could someone explain to me how the super motor works to drive, say , two wheels if the outer motor has a torque of 140 N*m and the inner one 70 N*m? If you're feeding the motor a `compound current' from one inverter, then how to you make the power to the wheels the same? Wouldn't you have to spin the 140 N*m motor half as fast or have some kind of gearing b/t the wheel and the motor?
-mt
How about some arrangement of planetary gears like those used in the Prius to sum the torque of the inner and outer rotors and feed it to a differnetial?
Posted by: ianF | 03 October 2005 at 10:20 PM
I would love to be a test driver for this fun looking car.
Posted by: Warren | 27 November 2005 at 01:40 PM
Hi
This Car is Super Cool ! Respect ! I have see the Car in Geneva. Very good Idee !
Greetz
from Switzerland
andrew
Posted by: andrew | 07 March 2006 at 01:51 AM