Single Output H-Bridge Drive

[0011]FIG. 1 illustrates a generalized block diagram of components of a drive circuit according to the present invention for producing and delivering the drive current to the winding of a bipolar brushless DC motor M.

[0012]FIG. 1A shows the stator winding 162 (4 tooth, 4 slot) for a bipolar motor. The particular bipolar configuration shown in the figure uses a four slot stator 162 with stator windings on each of the four teeth 166a-166d. It will be appreciated that the present invention can be used with other slot configurations.

[0013]In the stator winding 162 shown in FIG. 1A, commutation involves driving current through pairs of the stator windings in synchrony with the rotor. There is a single winding that wraps around all four stator teeth 166a-166d, but they are wound in alternating clockwise and counter-clockwise orientations. Thus, in a bipolar motor, the windings 164a, 164b shown in FIG. 1A represent two segments of a single winding. Thus, if segment 164a is wound around both t