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2. Electronic speed control - Wikipedia

   en.wikipedia.org/wiki/Electronic_speed_control

   An electronic speed control (ESC) is an electronic circuit that controls and regulates the speed of an electric motor. It may also provide reversing of the motor and dynamic braking. Miniature electronic speed controls are used in electrically powered radio controlled models. Full-size electric vehicles also have systems to control the speed of ...

3. Motor soft starter - Wikipedia

   en.wikipedia.org/wiki/Motor_soft_starter

   Typically, the voltage is controlled by reverse-parallel-connected silicon-controlled rectifiers , but in some circumstances with three-phase control, the control elements can be a reverse-parallel-connected SCR and diode. [2] [3] Another way to limit motor starting current is a series reactor. If an air core is used for the series reactor then ...

4. Motor control center - Wikipedia

   en.wikipedia.org/wiki/Motor_control_center

   Motor control centers are usually used for low voltage three-phase alternating current motors from 208 V to 600 V. Medium-voltage motor control centers are made for large motors running at 2300 V to around 15000 V, using vacuum contactors for switching and with separate compartments for power switching and control. [3]

5. Dahlander pole changing motor - Wikipedia

   en.wikipedia.org/wiki/Dahlander_pole_changing_motor

   Robert Dahlander. A Dahlander motor (also known as a pole changing motor, dual- or two speed-motor) is a type of multispeed three-phase induction motor, in which the speed of the motor is varied by altering the number of poles; this is achieved by altering the wiring connections inside the motor.

6. Brushless DC electric motor - Wikipedia

   en.wikipedia.org/wiki/Brushless_DC_electric_motor

   A typical controller contains three polarity-reversible outputs controlled by a logic circuit. Simple controllers employ comparators working from the orientation sensors to determine when the output phase should be advanced. More advanced controllers employ a microcontroller to manage acceleration, control motor speed and fine-tune efficiency.

7. Direct torque control - Wikipedia

   en.wikipedia.org/wiki/Direct_torque_control

   Direct torque control (DTC) is one method used in variable-frequency drives to control the torque (and thus finally the speed) of three-phase AC electric motors.This involves calculating an estimate of the motor's magnetic flux and torque based on the measured voltage and current of the motor.

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   mail.aol.com

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9. Three-phase electric power - Wikipedia

   en.wikipedia.org/wiki/Three-phase_electric_power

   Three-phase transformer with four-wire output for 208Y/120 volt service: one wire for neutral, others for A, B and C phases. Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2]