Brushless direct current motor

A brushless direct current motor having a stator provided with at least one stator winding producing an alternating field, the stator winding comprising at least one independently energizable winding path, a permanent magnet rotor, and means for sensing rotor position and generating rotor position signals, the motor furthermore comprising

• first and second power transistor means connected to the stator winding and so connected to the rotor-position-signal-generating means as to be rendered alternately conductive by the latter in order to cause the field from the stator winding to alternate between its two different field orientations,
• the first and second power transistor means having like output electrodes each connected to a common line, and furthermore having like control electrodes;
• and
• capacitor means connecting the control electrode of the first power transistor means to the control electrode of the second power transistor means in such a fashion that when either one of the power transistor means is in conductive state with the other in non-conductive state, the capacitor means develops across itself a voltage of magnitude and polarity such that when said one and said other power transistor means are thereafter to become, respectively, non-conductive and conductive, said capacitor means voltage acts to initially reverse bias said other power transistor means, thereby delaying assumption by the latter of its conductive state until after said one power transistor means has been non-conductive for a predetermined period of time, whereby to prevent the alternately conductive first and second power transistor means from becoming briefly conductive simultaneously with each other during their interchange of conduction states.