Tesla motor ac or dc

Article Navigation:
  • Photo
  • Why does tesla use an AC motor? | Tesla Motors Club
  • Video
  • Yup, like they said, the motor is AC, but the battery pack (like every battery) stores and delivers electricity as DC. Speed and motor direction are.

    While 3-phase induction motors have great utility, they also have some severe limitations. They cannot operate from DC; AC is a must.

    Should someone smarter than me explaine why Tesla uses an AC induction motor as opposed to a DC motor. The AC motor needs the inverter.

    In this paper, we talk about the control of a kW permanent magnet synchronous generator which is used for a hybrid turbocharger for a marine application. How can I calculate the motor power rating for the electric bicycle? Thus, the induction machine when operated with a smart inverter has an advantage over a DC brushless machine — magnetic and conduction losses can be traded such that efficiency is optimized. It is an electric vehicle.

    Error (Forbidden)

    By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. I was just watching a mega factory video and wondered why they use an AC motor which requires a power inverter instead of DC which may be powered directly from their DC battery?

    Introducing an inverter means more cost weight, controller, etc. Are there any reasons for that? What are the differences between an AC and DC motor that may have lead to this decision? Also does anyone know what kind of motor is used in other electric cars? You're asking about the technical tradeoffs surrounding the selection of a traction motor for an electric vehicle application.

    Describing the full design tradespace is far beyond what can reasonably be summarized here, but I'll outline the prominent design tradeoffs for such an application. Because the amount of energy that can be stored chemically i. Most transit application traction motors for automotive applications range between 60kW and kW peak power.

    Thus reducing current in half reduces resistive losses by 4x. As a result most automotive applications run at a nominal DC link voltage between and V nom there are other reasons for this selection of voltage, too, but let's focus on losses.

    Supply voltage is relevant in this discussion, as certain motors, like Brush DC, have practical upper limits on supply voltage due to commutator arcing. While Brush DC motors can have permanent magnets, the size of the magnets for traction applications makes them cost-prohibitive. As a result, most DC traction motors are series- or shunt-wound. In such a configuration, there are windings on both stator and rotor.

    Following are some brash generalizations regarding tradeoffs between the three motor technologies. There are plenty of point examples that will defy these parameters; my goal is only to share what I would consider nominal values for this type of application. Brushes subject to wear; require periodic replacement. Low - motor and controller are generally inexpensive BLDC: High - high power permanent magnets are very expensive Induction: Moderate - inverters add cost, but motor is cheap.

    Windings on rotor make heat removal from both rotor and commutator challenging with high power motors. Windings on stator make heat rejection straightforward. Magnets on rotor have low-moderate eddy current-induced heating Induction: Windings on stator make stator heat rejection straightforward.

    Induced currents in rotor can require oil cooling in high power applications in and out via shaft, not splashed. Theoretically infinite zero speed torque, torque drops with increasing speed.

    Brush DC automotive applications generally require gear ratios to span the full automotive range of grade and top speed. Constant torque up to base speed, constant power up to max speed. Automotive applications are viable with a single ratio gearbox. Can take hundreds of ms for torque to build after application of current. At high voltages, commutator arcing can be problematic. Brush DC motors are canonically used in golf cart and forklift 24V or 48V applications, though newer models are induction due to improved efficiency.

    • Подписаться по RSSRSS
    • Поделиться VkontakteVkontakte
    • Поделиться на FacebookFacebook
    • Твитнуть!Twitter

    Leave a Reply

    Return to Top ▲TOP ▲