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  2. DC motor - Wikipedia

    en.wikipedia.org/wiki/DC_motor

    A series motor has very high starting torque and is commonly used for starting high inertia loads, such as trains, elevators or hoists. [2] This speed/torque characteristic is useful in applications such as dragline excavators , where the digging tool moves rapidly when unloaded but slowly when carrying a heavy load.

  3. Torque motor - Wikipedia

    en.wikipedia.org/wiki/Torque_motor

    A torque motor is a specialized form of DC electric motor which can operate indefinitely while stalled, without incurring damage. In this mode of operation, the motor will apply a steady torque to the load (hence the name). A torque motor that cannot perform a complete rotation is known as a limited angle torque motor.

  4. Motor constants - Wikipedia

    en.wikipedia.org/wiki/Motor_constants

    If two motors with the same and torque work in tandem, with rigidly connected shafts, the of the system is still the same assuming a parallel electrical connection. The K M {\displaystyle K_{\text{M}}} of the combined system increased by 2 {\displaystyle {\sqrt {2}}} , because both the torque and the losses double.

  5. Direct torque control - Wikipedia

    en.wikipedia.org/wiki/Direct_torque_control

    The intermediate DC circuit's voltage variation is automatically taken into account in the algorithm (in voltage integration). Thus no problems exist due to dc voltage ripple or dc voltage transients; Synchronization to rotating machine is straightforward due to the fast control; Just make the torque reference zero and start the inverter. The ...

  6. Brushless DC electric motor - Wikipedia

    en.wikipedia.org/wiki/Brushless_DC_electric_motor

    A brushless DC electric motor (BLDC), also known as an electronically commutated motor, is a synchronous motor using a direct current (DC) electric power supply. It uses an electronic controller to switch DC currents to the motor windings producing magnetic fields that effectively rotate in space and which the permanent magnet rotor follows.

  7. Brushed DC electric motor - Wikipedia

    en.wikipedia.org/wiki/Brushed_DC_electric_motor

    A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source and utilizing an electric brush for contact. ...

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