Digital motor controller

Details Digital motor controller Digital motor controller

1991-07-02

1994-09-27

Ip, Paul

Electricity: motive power systems

Positional servo systems

With stabilizing features

318811, 318254, 318603, H02P 540, H02P 800

Patent

active

053509889

ABSTRACT:
A digital motor controller employs a digital signal processor to generate commutation commands that drive and brake a motor. The commutation commands are pulse width modulated. To avoid shoot-through, the digital signal processor automatically adjusts the widths of the pulses according to the amount of current being drawn by the motor. Motor speed is measured by taking the difference between consecutive samples from a position sensor and dividing the difference by the sampling time. The digital signal processor also closes position, speed and current loops. The commands provided by each loop are limited between upper and lower limits. Further, the digital signal processor automatically adjusts the upper and lower limits to compensate for changes in design characteristics due to variations in temperature. The digital motor controller can be used to control different motors having different design characteristics simply by reprogramming the upper and lower limits. A plurality of digital motor controllers can be used to control motors operating in tandem.

REFERENCES:
patent: 3660744 (1972-05-01), Plummer
patent: 3728607 (1973-04-01), Isak
patent: 3795851 (1974-03-01), Gage et al.
patent: 3917930 (1975-11-01), Davey et al.
patent: 4131835 (1978-12-01), Lange
patent: 4157538 (1979-01-01), Simon et al.
patent: 4249116 (1981-02-01), Hieda
patent: 4283664 (1981-08-01), Ebert
patent: 4369400 (1983-01-01), Turner et al.
patent: 4374351 (1983-02-01), Fishman et al.
patent: 4390865 (1983-06-01), Lauro
patent: 4412163 (1983-10-01), Angerbach et al.
patent: 4454458 (1984-06-01), Holland
patent: 4459529 (1984-07-01), Johnson
patent: 4477762 (1984-10-01), Kurakake et al.
patent: 4511827 (1985-04-01), Morinaga et al.
patent: 4528486 (1985-07-01), Flaig et al.
patent: 4563619 (1986-01-01), Davis et al.
patent: 4573002 (1986-02-01), Kurakake et al.
patent: 4581569 (1986-04-01), Fujioka et al.
patent: 4603283 (1986-07-01), Oltendorf
patent: 4611155 (1986-09-01), Kurakake
patent: 4631459 (1986-12-01), Fujioka et al.
patent: 4694229 (1987-09-01), Cormack
patent: 4717864 (1988-01-01), Fultz
patent: 4761703 (1988-08-01), Kliman et al.
patent: 4763057 (1988-08-01), Danz et al.
patent: 4772996 (1988-09-01), Hanei et al.
patent: 4779031 (1988-10-01), Arends et al.
patent: 4795958 (1989-01-01), Nakamura et al.
patent: 4843297 (1989-06-01), Landino et al.
patent: 4857814 (1989-08-01), Duncan
patent: 4882120 (1989-11-01), Roe et al.
patent: 4961038 (1990-10-01), MacMinn
patent: 4983895 (1991-01-01), Koharagi et al.

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