| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric power supply device for a motor-driven injection molding machine, capable of reducing the maximum electric power in an injection molding process to reduce an electric power capacity of an electric power receiving facility. Ž<P>SOLUTION: The electric power supply device (1) for supplying electric power to servo amplifiers (SA1, SA2, etc) is provided with an electric power storage device (3) having an electric power storage circuit (4). The electric power storage circuit (4) is constituted of: a basic circuit (7) comprising a coil (L) connected between a positive terminal (P) and a negative terminal (N) of a D.C. current voltage, with both ends thereof via diodes (D1, D2); and a circuit comprising a D.C. current electric power source (P'), switches (SW1, SW2), and the coil (L). A current is made to flow from the D.C. current electric power source (P') to the coil (L) to store the electric power as electromagnetic energy, and the power stored is supplied from the positive terminal (P) and the negative terminal (N) in the injection molding process. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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