Phase lock loop commutation position control and method

Details Phase lock loop commutation position control and method Phase lock loop commutation position control and method

1979-05-25

1981-10-13

Truhe, J. V.

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318722, 318723, 318724, 318138, 318254, H02P 528, H02P 736

Patent

active

042950856

ABSTRACT:
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.

REFERENCES:
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patent: 3584276 (1971-06-01), Ringland et al.
patent: 3601678 (1971-08-01), Abraham et al.
patent: 3908130 (1975-09-01), La Fuze
patent: 3937974 (1976-02-01), La Fuze
patent: 3940669 (1976-02-01), Tsuboi et al.
patent: 4060753 (1977-11-01), Okuyama et al.
patent: 4125796 (1978-11-01), Nagase et al.

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