US Patent No. 9,280,152

POWER SUPPLYING METHOD FOR INJECTION MOLDING MACHINE HAVING TRANSFORMER


Patent No. 9,280,152
Issue Date March 08, 2016
Title Power Supplying Method For Injection Molding Machine Having Transformer
Inventorship Hideki Koyama, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,280,152

1. A power supplying method for an injection molding machine,
wherein the injection molding machine includes a first servo amplifier configured to operate with a first allowable voltage,
a second servo amplifier configured to operate with a second allowable voltage different from the first allowable voltage,
and a transformer having a primary side terminal and a secondary side terminal and configured to transform voltages mutually
in a voltage ratio between the first allowable voltage and the second allowable voltage,

the power supplying method comprising:
supplying a voltage by, when the voltage of a main power supply supplied to the injection molding machine is equal to the
first allowable voltage, connecting the primary side terminal of the transformer to the main power supply, and connecting
the first servo amplifier directly to the main power supply, while connecting the second servo amplifier to the secondary
side terminal of the transformer to cause the transformer to transform the voltage of the main power supply in the predetermined
voltage ratio; and

supplying a voltage by, when the voltage of a main power supply supplied to the injection molding machine is equal to the
second allowable voltage, connecting the secondary side terminal of the transformer to the main power supply, and connecting
the first servo amplifier to the primary side terminal of the transformer to cause the transformer to transform the voltage
of the main power supply in the reciprocal of the predetermined voltage ratio, while connecting the second servo amplifier
directly to the main power supply.