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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 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 ...
There were no gears and the motor could draw up to 100 amperes from a 10-volt battery. [8] Two years later, in 1897, Hosea W. Libbey of Boston invented an electric bicycle (U.S. patent 596,272) that was propelled by a "double electric motor". The motor was designed within the hub of the crankset axle. [9]
This page was last edited on 5 May 2009, at 00:57 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...
Brushless motors can be extremely efficient this way, especially when regenerative braking is implemented. A large proportion of newer so-called "e-scooters" are designed this way. When electric direct drive is not the rule, the simplest is the spindle drive, which puts an extension of the engine's output shaft, the spindle, in direct contact ...
This page was last edited on 19 September 2017, at 21:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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