Motor control apparatus and speed setting apparatus

Details Motor control apparatus and speed setting apparatus Motor control apparatus and speed setting apparatus

1989-08-09

1991-07-02

Shoop, Jr., William M.

Electricity: motor control systems

Open loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388827, 388904, H02P 500

Patent

active

050292307

ABSTRACT:
A motor control apparatus for a sewing machine includes an adjustable speed setter for generating a speed set signal. A first memory stores a plurality of reference values each defining a reference region into which the speed set signal can fall. A second memory stores speed setpoint values corresponding to the reference regions. A central processing unit selects one of the reference regions by comparing the speed set signal with the reference values and selects the corresponding speed setpoint value from the second memory. A motor is controlled to run at the selected speed setpoint value.

REFERENCES:
patent: 3800198 (1974-03-01), Graf et al.
patent: 4084406 (1976-01-01), Brenneman
patent: 4346307 (1982-08-01), Zulaski
patent: 4368499 (1983-01-01), Stifter
patent: 4514665 (1985-04-01), Melocik et al.
patent: 4541029 (1985-09-01), Ohyama
patent: 4571690 (1986-02-01), Munetsugu
patent: 4734628 (1988-03-01), Bench
patent: 4780656 (1988-10-01), Mitchell
patent: 4918395 (1983-11-01), Inagaki

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