摘要:
An injection molding machine according to the invention includes a motor, a driver circuit that drives the motor; and a rectifying part that supplies electric power to the driver circuit. A regenerative line for regenerative electric power of the motor is connected to the rectifying part in parallel. A converting part and a harmonics component reducing part are provided in the regenerative line. The converting part converts direct electric power between the driver circuit and the rectifying part into alternating electric power which is input to the harmonics component reducing part.
摘要:
An injection molding machine includes a motor; a driver circuit; a rectifying part; a capacitor provided between the driver circuit and the rectifying part; a bridge circuit that converts direct electric power between the driver circuit and the rectifying part into alternating electric power; a harmonics component reducing part connected to an alternating side of the bridge circuit; and a regenerative line connected to the rectifying part in parallel, wherein the bridge circuit and the harmonics component reducing part are provided in the regenerative line, and plural switching elements of the bridge circuit are turned on or off such that electric power of the motor is regenerated when a voltage of the capacitor is greater than or equal to a predetermined value, and all the switching elements are turned off when the voltage of the capacitor is less than the predetermined value.
摘要:
An object is to enable accurate calculation of the energy supplied to a cylinder member and enable properly changing the supply energy in accordance with the type of molding material. A molding-machine supply-energy calculation apparatus includes a high-frequency-current generation circuit including a coil (16) disposed on a cylinder member, a DC voltage generation circuit (31), switching elements, and capacitors (C1 to C4), and adapted to generate high frequency current through switching of the switching elements and supply the current to the coil (16); an electrical variable detection section that detects an electrical variable representing a state of a resonance circuit (SR2); drive-signal generation processing section that generates drive signals (g1, g2) driving the switching elements on the basis of the electrical variable; and supply-energy calculation processing section that calculates the energy supplied to the cylinder member on the basis of a voltage generated by the DC voltage generation circuit (31), the capacitance of the capacitors (C3, C4), and the electrical variable. It becomes unnecessary to take the loss associated with switching of the switching elements into consideration.