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Servo motors and stepper motors are specialist types of fractional-horsepower electric motors usually intended for high-precision or robotics applications. Usually running from a DC supply, when combined with a planetary gearbox can offer accuracies less than 8 arc-minutes (2 ⁄ 15 ths of a degree, or approx. 2.3 milliradians). Due to their ...
A compound DC motor connects the armature and fields windings in a shunt and a series combination to give it characteristics of both a shunt and a series DC motor. [5] This motor is used when both a high starting torque and good speed regulation is needed. The motor can be connected in two arrangements: cumulatively or differentially.
A brushed DC electric motor is an internally commutated electric motor designed to be run from a ... [30] or intelligent estimators such as cascade-forward neural ...
Some of the problems of the brushed DC motor are eliminated in the BLDC design. In this motor, the mechanical "rotating switch" or commutator is replaced by an external electronic switch synchronised to the rotor's position. BLDC motors are typically 85%+ efficient, reaching up to 96.5%, [76] while brushed DC motors are typically 75–80% ...
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10 ft 10 in (3.30 m) Floor height: 40 in (1,016 mm) Doors: Sliding, 6 per car: Maximum speed: 75 mph (121 km/h) Traction system: Pre-rehab: Chopper control Post rehab: Alstom ONIX 2000 IGBT–VVVF [21] [22] Traction motors: Pre-rehab: DC motor Post rehab: 4 × Alstom 4EXA 2122 165 kW (221 hp) 3-phase AC induction motor: Power output: 660 kW ...