Tesla brushless motor




Tesla brushless motor

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  • Brushless DC motor (BLDC): electronically commutated by inverter, . Having followed Tesla and the EV market in general for many years, I'd.

    The shortest possible answer to the question of why Tesla Motors uses a 3-phase . Modern hybrids, however, all use brushless DC motors.

    The Tesla Model S powertrain uses one or two Tesla-manufactured three phase, four pole AC induction Most other electric cars use DC brushless motors.

    Tesla brushless motor

    Tesla brushless motor

    A lot of people are researching switched reluctance machines now. The cost of magnets is too high. Windings on stator make heat rejection straightforward. Both motors need almost exactly the same wiring in their stator, which is the outer non-moving part of the motor.

    Tesla brushless motor

    Tesla brushless motor

    Tesla brushless motor

    Tesla brushless motor

    Tesla brushless motor

    Model 3 Permanent Magnet vs. S/X induction Motors? : teslamotors

    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.

    Tesla brushless motor

    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.

    Tesla brushless motor

    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.

    Tesla brushless motor

    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.

    How does an Induction Motor work ?



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