| 摘要 |
<p>In a three-phase electronically commutated brushless DC-motor the beginnings of stator windings (k) for individual phases are spatially distributed along the periphery with respect to each other so, that the created magnetic field is shifted from phase to phase for 2/3 of the pole pitch T. The stator is provided with three rotor position sensors (6; OD1, OD2, OD3) situated above the rotor periphery, the angle spacing between them being equal to 2T/3. The rotor poles are permanent magnets (4) jutting out from the region of the stator plates (1), so that the rotor with its extended part directly influences the rotor position sensors (6; OD1, OD2, OD3) situated in the next vicinity of the rotor periphery. A control and regulation circuit (5) of the motor of the invention has a built-in pulse-width modulator (g), which by means of the rest of the circuit influences the chopping of the voltage for the excitation of the stator windings (k). Position sensors influence the excitation of the windings through the rest of electronic in such a way, that all three phases are continuously and simultaneously supplied. The chopping, being proportional to the input state, regulates the speed of the rotation as well as acceleration and deceleration of the motor.</p> |
