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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.
The Emrax 228 is a brushless 130 volt design producing a peak of 100 kW (134 hp), 55 kW (74 hp) continuous, with an outrunner coil. It has a 98% efficiency. It has a 98% efficiency. The low working rpm of the engine means that it can turn a propeller at efficient speeds without the need for a reduction drive .
The electric motor marketed as the Dyson Digital Motor (DDM) is a direct current motor, operating on the switched reluctance principle. [1] These brushless motors rotate at up to 110,000 rpm. [2] The motor used a two-pole brushless rotor with a digital controller.
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The stationary (stator) windings of an outrunner motor are excited by conventional DC brushless motor controllers. A direct current (switched on and off at high frequency for voltage modulation) is typically passed through three or more non-adjacent windings together, and the group so energized is alternated electronically based upon rotor position feedback.
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The rating of a brushless motor is the ratio of the motor's unloaded rotational speed (measured in RPM) to the peak (not RMS) voltage on the wires connected to the coils (the back EMF). For example, an unloaded motor of K v {\displaystyle K_{\text{v}}} = 5,700 rpm/V supplied with 11.1 V will run at a nominal speed of 63,270 rpm (= 5,700 rpm/V ...
The REB 90 is a brushless 350 volt design producing 80 kW (107 hp). Its rotational speed of 1800-2400 rpm allows it to turn a propeller at efficient speeds without the need for a reduction drive . [ 1 ] [ 2 ]