Electricity: motive power systems – Positional servo systems – 'reset' systems
Reexamination Certificate
2006-05-09
2006-05-09
Ip, Paul (Department: 2837)
Electricity: motive power systems
Positional servo systems
'reset' systems
C318S610000, C318S630000, C318S631000
Reexamination Certificate
active
07042187
ABSTRACT:
A driver for an electric actuator comprises a direction-switching means which switches a direction of rotation of a rotary driving source based on a direction instruction input signal, a current amplifier/limiter which converts a voltage outputted from the direction-switching means into a corresponding current and which limits the current with reference to a preset reference current IMAXor a threshold value, a current sensor which detects the current supplied to the rotary driving source, and a current loop by which a detection signal from the current sensor is fed back to an upstream side of the current amplifier/limiter.
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Copending U.S. Appl. No. 11/273,343 filed on Nov. 15, 2005, by Shigekazu Nagai et al.
Hirose Takeshi
Nagai Shigekazu
Guss Paul A.
Ip Paul
SMC Kabushiki Kaisha
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