Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Reexamination Certificate
2007-10-09
2007-10-09
Ip, Paul (Department: 2837)
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
C318S568160, C318S473000, C318S800000, C361S042000, C361S118000
Reexamination Certificate
active
11338787
ABSTRACT:
In a servo control apparatus constituted by a converter unit3for rectifying an AC power supply voltage to produce a DC power supply voltage, and a plurality of inverter units5for producing drive power supply voltages of motors from the DC power supply voltage, the servo control apparatus is provided with a power supply breaker2which is connected to the side of the AC power supply of the converter unit3; and a ground fault detecting circuit16built in the converter unit3. When a ground fault happens to occur, the servo control apparatus stops the operations of all of the inverter units5so as to cut off the breaker2.
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Sonoda Sumitoshi
Takahashi Shoetsu
Ip Paul
Kabushiki Kaisha Yasakawa Denki
Sughrue Mion Pllc.
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