Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1988-04-01
1989-10-17
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
3185682, 31856822, 318567, 318565, 318599, 364513, 901 23, 901 19, G05B 500
Patent
active
048749974
ABSTRACT:
Circuitry is provided for applying a pulse width modulation (PWM) scheme to a brushless DC motor that operates as a robot axis drive. A pulse width modulation (PWM) scheme provides for digital implementation of robot control commands. For this purpose, it provides time stabilized current sampling synchronized to the sampling frequency of the position and velocity loops in the robot control. The brushless drive application circuitry provides for application of the PWM control outputs to commutate the motor energization from winding pair to winding pair.
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Casler, Jr. Richard J.
Daggett Kenneth E.
Johnson Richard A.
Onaga Eimei M.
Brzuszek J. L.
Ip Paul
Shoop Jr. William M.
Unimation Inc.
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