| 摘要 |
<p>An integrated circuit switch including a Hall element, a Hall-voltage amplifier having an output to which the inputs of two Schmitt trigger circuits are connected may be mounted between stator windings in a brushless D.C. motor as a rotor position detector and motor commutator circuit. The outputs of the respective Schmitt trigger circuit may be connected to excite a pair of the stator windings. The two binary exciting signals are mutually complimentary except for having non-simultaneous changes from one binary state to the other. Integrated circuits of this invention eliminate acoustic noise that is caused by such overlapping stator currents that were unwittingly present in commutation circuits of the prior art.</p> |
