Where are the motors used in Tesla produced?
1 Answers
Tesla's motors are three-phase induction motors produced by Taiwan's Fukuta Electric. An induction motor is a device where the rotor is placed in a rotating magnetic field, and under the influence of this field, it obtains a rotational torque, causing the rotor to turn. The electrical braking methods of Tesla's three-phase induction motor are as follows: 1. Dynamic Braking: During dynamic braking, the three-phase AC power supply to the motor is cut off, and DC power is supplied to the stator windings. At the moment the AC power is cut off, due to inertia, the motor continues to rotate in the original direction. This method is characterized by smooth braking but requires a DC power source and high-power motors, making the DC equipment costly, and the braking force is small at low speeds. 2. Plug Braking: Plug braking is further divided into load plug braking and power plug braking. (1) Load plug braking is also known as load reverse plug braking. This torque allows heavy objects to descend slowly at a stable speed. The characteristics of this braking method are: the power supply does not need to be reversed, no special braking equipment is required, and the braking speed can be adjusted. However, it is only suitable for wound-rotor motors, whose rotor circuit needs to be connected in series with a large resistor to make the slip ratio greater than 1. (2) Power plug braking: When the motor needs to be braked, simply swap any two-phase power lines to reverse the rotating magnetic field for quick braking. When the motor speed reaches zero, the power supply is immediately cut off. The characteristics of this braking method are: fast stopping, strong braking force, and no need for braking equipment. However, during braking, due to the high current, the impact force is also large, which can easily cause the motor to overheat or damage parts of the transmission system. 3. Regenerative Braking: Also known as feedback braking, under the influence of heavy objects, the motor's speed exceeds the synchronous speed of the rotating magnetic field. At this time, the rotor conductors generate an induced current, which produces a torque in the opposite direction of rotation under the influence of the rotating magnetic field. However, since the motor speed is high, a speed reduction device is needed to slow it down.