Search results

  1. R

    DC brushless motor vs. AC motor

    I noticed that common technology such as brushless DC motors use AC to drive them. What exactly makes DC brushless motors different from AC motors if they both ultimately take in AC? Why even refer to DC brushless motors as DC motors if they're not even driven by DC? I understand the source is a...
  2. R

    Does a physics background combine better with ME or EE industry jobs?

    Wouldn't a background in physics be good for nanoelectronics engineering? Doesn't that field require knowledge in quantum physics/statistical mechanics?
  3. R

    Does a physics background combine better with ME or EE industry jobs?

    As the title asks, does a physics background combine better with EE or ME for industry jobs in America? Which engineering field would have more jobs for someone like that? I'm talking in the context of someone double majoring in physics and ME/EE or doing an engineering physics degree.
  4. R

    Difference Engineering Physics, Applied Physics, traditional engineer

    Well, at my school an engineering physics major would take all the courses that a physics major is required to take PLUS most of the courses that an ME or EE major has to take. Engineering physics is a perfect degree for those planning on going to grad school but still haven't decided whether...
  5. R

    Programs Questions about Engineering Physics Degree

    To be honest, I'm actually a little more interested in physics than any engineering field. However, I do have a lot of interest in mechanical and electrical engineering too. So I figured an eng. phys. degree would be perfect to satisfy my interests. I'm just trying to figure out whether physics...
  6. R

    Programs Questions about Engineering Physics Degree

    I would prefer to work in northeastern USA. As for what industry, I would like to be involved in anything with internal combustion engines or aerospace if I do a mechanical concentration and anything to do with power (motors, generators, transformers, power electronics, and power systems) if I...
  7. R

    Programs Questions about Engineering Physics Degree

    With an engineering physics degree, which concentration would bring more job opportunities? Mechanical or electrical engineering? In terms of electrical engineering, I know an EP degree is good for going into nanoelectronics/photonics. Any other areas? Anything in power engineering...
  8. R

    Instant Torque (Electric Cars vs. Gas/Diesel Cars)

    Yeah, but batteries are the culprit for why electric cars are heavy and thus aren't quite as fast as the high performance gas cars of today, right? I always thought that electric motors can give more power than a typical IC engine for the same mass. Oh and the Model S has 600 N*m of torque...
  9. R

    Instant Torque (Electric Cars vs. Gas/Diesel Cars)

    I just wanted to add that the Tesla Model S Performance goes 0-60 in 4.2 seconds. Is the heaviness of lithium ion batteries what's slowing down electric cars? I mean, electric motors are superior to IC engines, right?
  10. R

    Instant Torque (Electric Cars vs. Gas/Diesel Cars)

    It was more about having that fast smooth acceleration that the Tesla Model S offers with an ICE car.
  11. R

    Instant Torque (Electric Cars vs. Gas/Diesel Cars)

    I'm not familiar with stick shift cars at all (or car mechanics in general) so bare with me as I have no idea what I'm talking about. But can't you rev up the engine to its max torque almost instantly using a clutch without moving the car and THEN hit the pedal to get that same feeling of...
  12. R

    Electrical Engineering and Computer Science Majors?

    ^I'm not so sure about that. Computer Science jobs are a lot more likely to get outsourced than EE jobs. With EE jobs, a lot of times you have to be there physically. For instance, an electric motor designer will often times be needed there to work with the technicians. Most...
  13. R

    Instant Torque (Electric Cars vs. Gas/Diesel Cars)

    So I hear a lot about how electric cars are great because electric motors get instant max torque at 0 RPM. However, can't the same be done with an internal combustion engine if you have a clutch?
  14. R

    Analysis and Design of Mechanisms

    Hello all, I'm an electrical engineering student searching for some advice regarding a mechanical engineering class. I have to take at least one upper level engineering class that's not electrical for my degree and I would prefer to take an ME class to fulfill that requirement. While browsing my...
  15. R

    Question about acceleration regarding Diesel vs. Gas

    I'm a little confused. Isn't torque the reason why RPM speeds up? The higher the torque, the faster the RPM goes up?
  16. R

    Question about acceleration regarding Diesel vs. Gas

    I've read on many sites that diesel cars usually accelerate slower than gas cars. Why is that though? Diesel engines reach higher torque and at lower RPMs so why is it that gas cars accelerate faster? Are diesel cars just a lot heavier or something?
  17. R

    EE Course: Signals and Systems

    Hi all, I'm in a bit of a dilemma. I have an opportunity to take Signals and Systems over the summer. However, I have not taken Differential Equations yet. A course on Electric Circuits is a prerequisite for this class and I ended up taking that last semester without any DE knowledge LOL...
  18. R

    Carbon footprint of Chevy Volt

    Hi all, I've heard people try to estimate the carbon footprint from the production of cars based on the cost of production. Can such an estimate be accurate at all?
  19. R

    EE questions

    Since you mentioned you like both the hardware and software sides of computers, it sounds to me like a computer engineering degree is the right thing for you. Of course, I don't know the school you're going to so maybe over there, Comp.E is considered a subdiscipline of EE. At my school, the...
  20. R

    Problems with the Dreamliner battery

    Elon Musk (co-founder of Tesla Motors and SpaceX) had this to say about the Dreamliner battery.
  21. R

    Can electrical motor produce a spark?

    I'm not 100% sure but I believe an insulation issue could cause a spark... I mean...I'm pretty sure when motors burn out they do cause some sparks...
  22. R

    Energy Density of Batteries

    One thing to consider about electric aircraft is that they would probably fly at much higher altitudes (at around 80,000 feet) than combustion airliners. At higher altitudes there is less atmospheric density and therefore there is reduced drag on the aircraft. Combustion engines can't run...
  23. R

    BMW i3 vs Tesla Model S

    Well, in terms of looks, I think the Tesla Model S is a lot sexier. Afterall, it's a sedan while the i3 is a mini. (yuck) That's just my opinion though. Looking at the facts, the Model S has longer range with all available battery capacities. However, the i3 will have a faster charge (I would...
  24. R

    Help an EE student get into mechanical design

    Hi, I'd like to learn some mechanical design. My knowledge in mechanics is mainly from general physics and a basic course in engineering mechanics. Is this enough to take on intermediate level mechanical design? Should I take a few ME classes? If so, what would you recommend? What is a good free...
  25. R

    Going into Medical Imaging (EE vs. BME)

    So I'm an EE undergrad student and the design of medical imaging devices is one area I'm interested in. I often hear that's more appropriate for a BME major. However, designing medial imaging devices undoubtedly involves a lot of knowledge in electronics design, signal processing...
  26. R

    Efficiency of power inverters in electric/hybrid vehicles

    I am interested in increasing the range of electric/hybrid vehicles. Increasing the energy density of batteries is something chemists, materials scientists, and chemical engineers worry about. What about from the electrical side though? Can electrical engineers do much to significantly...
  27. R

    Energy Density of Batteries

    Thank you Simon. With lithium being the 3rd lightest element in the universe, lithium-ion battery technology is one of the best things we have available on the market. However, lithium-ion batteries only increase 2 to 3 percent in energy density in an average year. Eventually they will reach...
  28. R

    Gasoline fuel cell (vs. gas generator)

    How much less carbon emissions would this fuel cell produce?
  29. R

    Mechanical or Electrical Problem?

    Last summer, I was taking apart a fan because it wasn't working. It turned as I expected that it was a burned out motor. Now one of my co-workers was a little upset at me because I had called it an electrical problem or failure. He said a burned out motor is a mechanical failure. Was he...
  30. R

    Power-to-weight ratio of electric motors

    I wasn't sure whether to put this in the mechanical engineering board or not but since electrical engineers typically design electric motors, I'll put it here. From what I hear, all types of electric motors have terrible power-to-weight ratios. So if we were to hypothetically one day have a...