Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1999-01-05
2000-09-19
Ro, Bentsu
Electricity: motive power systems
Open-loop stepping motor control systems
H02P 822
Patent
active
06121745&
ABSTRACT:
A system for controlling a stepper motor is disclosed that includes a microprocessor for directly generating current command signals. The microprocessor has a memory wherein the memory includes a function table, a first function table address, and a second function table address. A velocity signal (indicating a rotational position change per unit time) is calculated by the microprocessor during each update interval. Each update interval comprises a plurality of interrupt intervals. The microprocessor, in accordance with software-selectable current magnitude parameter values and microstepping parameter values, determines a first and second current value by accessing the function table at the first and second function table addresses, during each interrupt interval. The first and second current values generated by the microprocessor correspond to a pair of digital words representing a pair of phase current commands. The microprocessor outputs the pair of digital words to a drive circuit during each interrupt interval to energize a two-phase stepper motor.
REFERENCES:
patent: 4250544 (1981-02-01), Alley
patent: 4353019 (1982-10-01), Sweeney, Jr.
patent: 4518907 (1985-05-01), Giguere
patent: 4529919 (1985-07-01), Melocik et al.
patent: 4630210 (1986-12-01), Salazar et al.
patent: 4642536 (1987-02-01), Boyd, Jr. et al.
patent: 4651073 (1987-03-01), Shimizu et al.
patent: 4683408 (1987-07-01), Inoue et al.
patent: 4845608 (1989-07-01), Gdula
patent: 4868477 (1989-09-01), Anderson et al.
patent: 5099185 (1992-03-01), Kono et al.
patent: 5187417 (1993-02-01), Minnich et al.
patent: 5198741 (1993-03-01), Shinada et al.
patent: 5249118 (1993-09-01), Smith
patent: 5252903 (1993-10-01), Maruyama
patent: 5272424 (1993-12-01), Lee
patent: 5290205 (1994-03-01), Densmore et al.
patent: 5359271 (1994-10-01), Husher
patent: 5420492 (1995-05-01), Sood et al.
patent: 5475289 (1995-12-01), McLaughlin et al.
patent: 5489250 (1996-02-01), Densmore et al.
patent: 5508594 (1996-04-01), Underwood et al.
patent: 5545112 (1996-08-01), Densmore et al.
patent: 5552691 (1996-09-01), Pierce et al.
patent: 5583410 (1996-12-01), Jacobson et al.
patent: 5640075 (1997-06-01), Brasseur et al.
patent: 5648759 (1997-07-01), Miller et al.
Ro Bentsu
Warner Electric Technology, Inc.
LandOfFree
Direct current command generation for a stepper motor drive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direct current command generation for a stepper motor drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct current command generation for a stepper motor drive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1076615