A Hall effect motor differs in that the pulses of current to the phase coils of the motor are sent to it by a controller.
In a brushed motor, the brushes correspond to rotating connections on the armature as it turns, distributing the current to each phase coil correctly in turn.
In a Hall effect motor, there are Hall sensors (a magnetically sensitive form of transistor) in the motor, and they "read" the position of the motor's magnets and feed back to the controller the position that the rotor of the motor is in. From that the controller knows which phase coil to send the current to for the motor to start turning in the correct direction.
As the motor turns, the Hall sensors feed back a continuous stream of positional information, enabling the controller to maintain the stream of current pulses to the coils in correct sequence.
The Hall effect motor's advantage is that the period of sending current can be maximised by the controller, not tied to the momentary inefficient contact of a carbon brush on a rotating commutator, so the Hall motor potentially has a higher performance and in particular, wider power/torque bands.
Hall was the man who found how to utilise this magnetic effect, hence the capitalised name.
You can see the operating sequence of a controller and motor, and step through it in slow motion on my Torq Talk website
here.
The Panasonic unit has a Hall effect motor, but the rest of it's control system is additional to that.
.
) could explain to me in fairly simple terms just what a 'Hall Effect' motor is and how it differs from a brushed electric motor? I've seen the term a lot, obviously, but have no idea what it means..........
