Clock rate control of electronically commutated motor rotational

Details Clock rate control of electronically commutated motor rotational Clock rate control of electronically commutated motor rotational

1980-01-04

1981-02-10

Truhe, J. V.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318254, 318439, 318696, H02P 602

Patent

active

042504350

ABSTRACT:
A speed control system for an electrically commutated motor which is readily adaptable to digital velocity control input and which provides highly efficient and accurate control in a relatively inexpensive manner. Desired motor rotational velocity is commanded by an input clock rate, which may be variable, rather than by a voltage or current signal. A sensor is provided for determining actual rotor position, and actual rotor position is periodically compared with instantaneous desired motor position as indicated by the time of occurance of one of the input clock signals or pulses. Depending upon the results of this periodic comparison, a dynamically established active current limit is modified. Specifically, if motor rotor actual position leads desired position, the current limit is reduced. If, on the other hand, actual motor position is lagging, the current limit is increased. If the rotor is at the correct position, or within a predetermined deadband, the current limit is unchanged. This control action occurs simultaneously with conventional winding commutation taking place under the control of a, commutation sequencer periodically advanced in conventional fashion as the rotor reaches each of a plurality of predetermined positions.

REFERENCES:
patent: 3152462 (1964-10-01), Elliott et al.
patent: 3152463 (1964-10-01), Sones et al.
patent: 3279223 (1966-10-01), Severance et al.
patent: 3369381 (1968-02-01), Crane et al.
patent: 3503228 (1970-03-01), Lake
patent: 3754175 (1973-08-01), Grault
patent: 3783357 (1974-01-01), Ichiyanage
patent: 3783359 (1974-01-01), Malkiel
patent: 3840790 (1974-10-01), Stich et al.
patent: 3911339 (1975-10-01), Rettig
patent: 3931556 (1976-01-01), Ban et al.
patent: 3932793 (1976-01-01), Muller
patent: 3949283 (1976-04-01), Okuyama et al.
patent: 3979651 (1976-09-01), Bringol
patent: 4088932 (1978-05-01), Okuyama et al.
patent: 4107594 (1978-08-01), Jacobs
patent: 4107595 (1978-08-01), Campe
patent: 4119895 (1978-10-01), Muller

Affiliated with

Also associated with

Rating

Clock rate control of electronically commutated motor rotational does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock rate control of electronically commutated motor rotational, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock rate control of electronically commutated motor rotational will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1667296