초록 ▼

A phase lock loop commutation position control and method for a drive system for a DC field motor having a rotor and a plurality of stator windings is disclosed. Electric power is supplied to the stator windings in accordance with gating signals. The gating signals are generated in accordance with t

A phase lock loop commutation position control and method for a drive system for a DC field motor having a rotor and a plurality of stator windings is disclosed. Electric power is supplied to the stator windings in accordance with gating signals. The gating signals are generated in accordance with timing signals, which are provided in response to a clocking signal. A position signal is furnished as a function of the position of the rotor with respect to a preselected stator position. An error signal is generated proportionally to the phase difference between a preselected timing signal and the position signal. The clocking signal is produced as a function of the error signal. The invention also can include a shift signal produced as a function of the rotation of the rotor. The shift signal is added to the error signal effectively to cause the preselected timing signal to be advanced with respect to the position signal. In addition, a shift signal can be produced as a function of the current level of the electric power, and this shift signal can be added to the error signal effectively to cause the preselected timing signal to be advanced with respect to the position signal. The invention can also cause the timing signals to be provided for generating the gating signals in accordance with the position signal when the rotation of the rotor is below a preselected value.

대표청구항 ▼

A drive system for a multiphase DC field motor having a rotor and a stator windings for each machine phase, said drive system comprising: (a) means for sequentially supplying electric power to said stator windings in response to gating signals generated in accordance with the position of the rotor w

A drive system for a multiphase DC field motor having a rotor and a stator windings for each machine phase, said drive system comprising: (a) means for sequentially supplying electric power to said stator windings in response to gating signals generated in accordance with the position of the rotor with respect to such stator windings; (b) means for generating gating signals for sequentially supplying electric power to said stator windings in accordance with a plurality of timing signals equal to the number of machine phases; (c) means for generating said timing signals as a function of the position of said rotor comprising; (d) means for furnishing a plurality of position signals as a function of the position of said rotor with respect to a plurality of preselected stator positions, said position signals being lesser in number than the number of stator windings; (e) means for generating error signals proportional to phase difference between preselected ones of said timing signals and said positions signals; (f) means for producing clocking signals as a function of said error signals; (g) means for supplying said clocking signal to said means for generating timing signals; (h) means for deriving additional timing signals representative of intermediate rotor positions from said clocking signals.