초록 ▼

A contactless electronic control system particularly adapted to drive a motorized wheel hub includes a tubular bracket and a tubular grip member encircling the bracket and connected thereto by a rotary connection so that the grip member can rotate about the bracket. A ring magnet having diametricall

A contactless electronic control system particularly adapted to drive a motorized wheel hub includes a tubular bracket and a tubular grip member encircling the bracket and connected thereto by a rotary connection so that the grip member can rotate about the bracket. A ring magnet having diametrically opposite poles is mounted in the grip member for rotation therewith and a Hall Effect device is mounted to the bracket. When the grip member is rotated in one direction so as to move one of the poles toward the device, the device produces a proportional positive electrical signal and when the grip members rotated relatively in the opposite direction so as to move the other of the poles toward the device, the device produces a proportional negative signal. Preferably, the magnet is positioned between concentric inner and outer pole pieces and the grip member is biased to a home position which locates the magnets poles on opposite sides of the sensor. Preferably also, the control system includes a current source and a control circuit which responds to the proportional voltages produced by the Hall Effect device to develop drive signals suitable for causing a brushless DC motor to operate at various speeds in both the forward and reverse directions.

대표청구항 ▼

[ What is claimed is:] [1.] A contactless electronic control system comprisingan inner pole piece and an outer pole piece, said inner and outer pole pieces being concentric and rotatable relatively about a common axis through a range of relative angular positions in either direction from a home posi

[ What is claimed is:] [1.] A contactless electronic control system comprisingan inner pole piece and an outer pole piece, said inner and outer pole pieces being concentric and rotatable relatively about a common axis through a range of relative angular positions in either direction from a home position;a generally circular magnet having north and south poles on opposite sides of the magnet being fixed to one of said inner and outer pole pieces;a Hall Effect sensor position radially at a selected location between said magnet and the other of said inner and outer pole pieces so that when said inner and outer pole pieces are rotated relatively in one direction so as to move one of said north and south poles away from the home position and towards said sensor, said sensor produces continuously variable proportional positive electrical signals and when the inner and outer pole pieces are rotated relatively in the opposite direction so as to move the other of said north and south poles away from the home position and towards the sensor, said sensor produces continuously variable proportional negative electrical signals, and means for establishing said home position.