Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Patent
1992-10-21
1993-06-29
Wysocki, Jonathan
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
388904, 3889075, H02P 700
Patent
active
052237745
ABSTRACT:
A method for controlling a speed of a motor includes the steps of setting an upper limit threshold level for the thresholding at an upper limit value of the set speed range and a lower limit threshold level for the thresholding at a lower limit value of the set range speed, providing a signal based on a parameter table having a plurality of different duty factors for stepwisely adjusting the speed of the motor so that, when the speed of the motor exceeds the upper limit value, an input of the motor is switched to a signal of a lower rank of duty factor within the parameter table, whereas when the speed of the motor lowers to a speed below the lower limit value, an input of the motor is switched to a signal having a higher rank of duty factor within the parameter table. A motor speed control device for implementing the method includes an ROM element in which signals representing a parameter table are stored and a speed sensor for determining whether the motor speed exceeds a predetermined value or is below a certain value and for applying an appropriate duty factor accordingly.
REFERENCES:
patent: 4243921 (1981-01-01), Tamura et al.
patent: 4463435 (1984-07-01), Cavill
patent: 4506321 (1985-03-01), Comstock et al.
patent: 4513381 (1985-04-01), Houser, Jr. et al.
patent: 4656572 (1987-04-01), Caputo et al.
patent: 4827148 (1989-05-01), Hirosawa et al.
patent: 4838037 (1989-06-01), Wood
patent: 4899234 (1990-02-01), Genheimer
patent: 4959602 (1990-09-01), Scott et al.
Ikeda Masahiro
Usuki Hideo
Sankyo Seiki Mfg. Co. Ltd.
Wysocki Jonathan
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