Electric motors consume nearly half of all global energy, so the drives need to be highly efficient. Electric machines include materials that can vary drastically in price over a relatively short period of time due to market demands and a limited supply of the raw materials. Traction motors used in hybrid electric vehicles (HEV/EV) utilize rare earth permanent magnets. Changing a design parameter, such as the shape or size of the magnets, most likely will have consequences on performance such as a reduction in efficiency or will introduce a change in torque quality.
The modified design and the original design provided by Magna Electronics. The modification included the reduction of the magnet length and decrease of “V-angle” of the magnets.
Engineers who design interior permanent magnet (IPM) machines most often create a 2-D plot of the efficiency and torque of the machine versus its rotation speed, known as an efficiency map. The goal is to reduce the magnet size and maintain the maximum torque and efficiency for the entire speed and torque range. An efficiency map can be created by taking measurements in the test environment of the output torque, input power and output power. Of course, this means that the traction motor first must be designed and manufactured.
Also, at this late stage of the design cycle, making design changes to improve performance is costly and takes another round of prototyping. Consequently, IPM traction motor engineers utilize simulation tools that quickly, yet very accurately, predict the performance of the traction motor and drive product development. Engineers who are responsible for the electromagnetic design of IPM electric motors usually employ the finite element method (FEM).
During the last few weeks, I had the opportunity of a lifetime to witness two competitive sport clients race with machines that were developed using ANSYS fluid dynamics engineering simulation tools. I can guarantee you that I was like a kid in candy store!
In September, I was on vacation in San Francisco to see the America’s Cup and had the chance to see Emirates Team New Zealand race. As you might recall, they won the Louis Vuitton Cup — but unfortunately not the America’s Cup. Even so, seeing those monsters race on the SF Bay was phenomenal. What a spectacle! Amazing sailing, impressive engineering.
These are just a couple of the photos I took at the event. One shows the boat after the race. I thought it was a cool picture because it showed how massive it is. The other shows the actual wing.
If you want to know more about the America’s Cup and fluid dynamics simulation, please listen to the designer team of Emirates Team New Zealand talk about it here. Continue reading
It sounds like something out of Star Trek or Buck Rogers, but the notion of a super-fast (think speed of sound or faster) ground-based transportation system isn’t science fiction.
About a month ago, Elon Musk, the visionary behind ANSYS customers SpaceX and Tesla, formally proposed the Hyperloop, which would transport people via aluminum pods enclosed inside of steel tubes. These pods would travel up to 750 miles per hour, shrinking travel time between cities. (A trip from Los Angeles to San Francisco would be only 30 minutes!)
But as it often happens when a true innovator steps forward with a new idea, the critics descended. They claimed the Hyperloop was nothing more than mere fantasy, that it wouldn’t be practical. Even Musk himself admitted that prototypes were needed before he could turn the Hyperloop into reality.
I’ve been personally interested in the idea of this potential mode of transportation for some time now. In my opinion, the technologies needed for implementing tube transportation are extremely simple, compared to some of the highly sophisticated machines such as commercial airliners or spacecraft that humans routinely construct today.
So, using ANSYS technology, we put Musk’s Hyperloop designs to the test. The upshot? The Hyperloop will indeed work – with some tweaks. Continue reading
Two years ago, ANSYS, Inc. acquired Apache Design to broaden its presence in the IC-aware system simulation market, particularly for the high-growth mobile and consumer electronics segments. We had a vision of combining chip-level analysis and modeling solutions from Apache with package and systems electromagnetics, thermal/fluids and mechanical simulation platforms from ANSYS, to enable the next generation of low-power, energy-efficient products. We had also underscored our commitment toward customers’ success by providing continuous support and technology innovation. On our two-year anniversary, we reflect on the progress that we have made toward this vision.
Since the acquisition by ANSYS, Apache has achieved: Continue reading
The other day I read, “Fuel cell-powered vehicles are just a few years away.” We have been hearing this for the past 20 years. Fuel cell buzz has come and gone and then come again and disappeared again. It’s been quite a roller coaster. Lately the buzz is becoming louder again. Is it serious this time? Are fuel cells on a major comeback?
In the past two years, I have noticed that fuel cell research and development and investments are resurging. I attribute it to the following reasons — in no particular order: Continue reading
In today’s ultra-competitive environment, product differentiation increasingly depends on embedded software. From automobiles to airplanes to medical devices, systems architecture and embedded software are important parts of product development cycles. Being able to manage these processes effectively so that you get the desired results is becoming a differentiator.
Today, the cars that we drive have more that 10 million lines of code! Can you imagine the hours it takes to come up with the definitions of what the car should do and how it should do it — let alone implement all this correctly through software code? It’s a time-consuming process, and getting it right the first time is challenging. We’ve all seen examples of what happens when the code isn’t correct. Incorrect code can cost companies millions of dollars, and more importantly, it erodes customers’ trust in that brand.
By using model-based, production-proven software tools for the development of embedded code, products can be developed in a faster and safer manner. And, when coupled with a certified automatic code generator, compliance for standards like DO-178B/C in aerospace, ISO 26262 in automotive and EN 50128 in rail is more rapidly achieved. Continue reading
What happens when a bird runs into a plane while the plane is soaring through the air? How do you identify exactly what happened in that split second? And since every action has a reaction, how do you determine if the plane is designed to survive a bird strike? Understanding the physics of split-second events: This is the arena of explicit dynamics analysis.
Now consider split-second impacts in golf. United States Golf Association specifications regulate the speed limit with which a golf ball leaves the face of a driver. Using a standard of approximately 109 mph clubhead speed, approved golf balls leave the face of the driver at about 180 mph on average. If you’re charged with designing balls and clubs, how do you get to the optimal design that meets specs?
Animation courtesy Advanced International Multitech Co., Ltd. Continue reading
On October 29 through 30, 2013, ANSYS once again hosts the Automotive Simulation World Congress (ASWC).
As I announced at the 2012 ASWC held in Detroit in October 2012, the event is an annual international conference that rotates across the three major regions of the world — the Americas, Europe and Asia. Slated to move from the Americas to Europe this year, the ASWC will be held in Frankfurt, Germany at the Steigenberger Airport Hotel, with an evening event at Klassikstadt.
This international event focuses on advances in simulation technology applied to the ground transportation industry, which includes car, light truck, heavy truck, bus, off-highway, agricultural, motorsport, railway and two-wheeler segments. Continue reading