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The 28BYJ-48, accompanied by a ULN2003 driver, is one of the most popular stepper motors among hobbyists. A microcontroller or stepper motor controller can be used to activate the drive transistors in the right order, and this ease of operation makes unipolar motors popular with hobbyists; they are probably the cheapest way to get precise ...
A unipolar motor (also called homopolar motor) is a direct current (DC) motor typically with slip-rings on each end of a cylindrical rotor and field magnets or a DC field winding generating a magnetic field on the stator. The rotor has typically not a winding but just straight connections in axial direction between the slip-rings (e.g. a copper ...
Brushed motors were the first commercially important application of electric power to driving mechanical energy, and DC distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings. Brushed DC motors can be varied in speed by changing the operating voltage or the strength of the magnetic field.
The planar motor is a driver/guideless drive system. The planar motor consists of a flat base element ("stator") made of tiles and carriages ("movers") arranged on it. The latter are equipped with mostly cuboid magnets whose magnetization is perpendicular to the plane and which are controlled in the X and Y directions with alternating polarity .
Modern cheap universal motor, from a vacuum cleaner. The bipolar motor is still in widespread use today, in medium-power, low-cost applications such as the universal motors used in home appliances such as food mixers, vacuum cleaners and electric drills. These motors are broadly the design of the brushed DC motor with series-connected field ...
The Star 37FM rocket motor was developed and qualified for use as an apogee kick motor on FLTSATCOM. The motor is a replacement for the Star 37E Delta, which has been discontinued. The Nozzle assembly uses a 3D carbon-carbon throat and a carbon-phenolic exit cone. Maximum propellant weight is 2,350 pounds (1,070 kg), while the motor has been ...
The Star 48 is the largest of a family of solid rocket motors used by many space propulsion and launch vehicle stages, almost exclusively as an upper stage. It was developed primarily by Thiokol Propulsion and after several mergers, is manufactured by Northrop Grumman ’s Space Systems division.