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Electromagnetic rotation experiment of Faraday, ca. 1821 [2] Working principle of a homopolar motor: due to movement of negative charges from center towards rim of the disk, a Lorentz force F L is created which brings the entire disk into rotation. The homopolar motor was the first electrical motor to be built.
The plant was designed by Albert Kahn as a Model T assembly plant, and built in 1916. Its design represents an important step in the development of Ford's assembly process. Previously, each step in the assembly of an automobile had taken place in a different building, which entailed a cost in time and labor to move the product from one building to anothe
The actuation process of the inchworm motor is a multistep cyclical process: [2] First, one group of 'locking' crystals is activated to lock one side and unlock other side of the 'sandwich' of piezo crystals. Next, the 'motive' crystal group is triggered and held. The expansion of this group moves the unlocked 'locking' group along the motor path.
A stepper motor, also known as step motor or stepping motor, [1] is a brushless DC electric motor that rotates in a series of small and discrete angular steps. [2] Stepper motors can be set to any given step position without needing a position sensor for feedback .
Another way of changing speed of a direct current motor is to change the voltage applied to the armature. An adjustable-speed motor drive might consist of an electric motor and controller that is used to adjust the motor's operating speed. The combination of a constant-speed motor and a continuously adjustable mechanical speed-changing device ...
The motor from a 3.5 in floppy disk drive. The coils, arranged radially, are made from copper wire coated with blue insulation. The rotor (upper right) has been removed and turned upside-down. The gray ring inside its cup is a permanent magnet. This particular motor is an outrunner, with the stator inside the rotor. DC brushless ducted fan. The ...
The main components of the motor are the stator and rotor. [112] The motor construction begins when a robot unspools and winds over 1 ⁄ 2 mile (0.80 km) of copper wire per motor. It then pulls the copper wire into a stack. The motor has three phases and so requires three coils of copper. [112]
During operation, it was necessary to adjust the position of the brush ring to adjust the commutation to minimise the sparking at the brushes. This process was known as 'rocking the brushes'. Various developments took place to automate the process of adjusting the commutation and minimizing the sparking at the brushes.