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Originally posted by XL5
Well then, magnets could be the battery of the future! No, toxic chemicals, long shelf life and very modular!
he prototype motor presented is a permanent magnet design, with the magnets suspended in an inner frame forming the rotor and multiple coils embedded in an outer frame forming the stator. The unit is designed with helical rows of matching magnets and coils, whose numbers can be varied depending on the size requirements. The stator is pulsed with direct current (DC) forming an opposing electric field, i.e. repulsive orientation, thus collapsing the existing permanent magnetic field and causing the motor to rotate. A series of electronic switches are triggered by an optical sensor to provide proper pulse width and timing. A standard DC-DC motor controller system is used to control the magnitude of the pulses and therefore the speed.
A stepper motor is a type of electric motor which is used when something has to be positioned very precisely or rotated by an exact angle.
In a stepper motor, an internal rotor containing permanent magnets is controlled by a set of stationary electromagnets that are switched electronically. Hence, it is a cross between a DC electric motor and a solenoid. Stepper motors do not use brushes and commutators.