Application Case Industrial Automation BU, Delta Electronics, Inc. Case Application of Delta's AC Motor Drive in Injection Machine Issued by Solution Center Applicable to Date December, 2009 Pages 2 VFD-VJ series AC Motor Drive The drive device of the injection machine is made up of power device, mechanical device, control device, auxiliary device and transmission medium. The power device, which mainly consists of hydraulic pump, motor and oil tank, is also called hydraulic energy. It utilizes the motor to drive the hydraulic pump and convert mechanical energy to the pressure source of hydraulic pressure. This is the device that offers the system pressure of entire injection machine. In the hybrid control of the traditional injection machine, the hydraulic pump motor is operated under a long time to control the tanks of mold close and injection and hydraulic motor of melt polymer according to the timing of proportional valve and directional valve. Because of the long time operation, it causes the electricity consumption and high cost. Therefore, a new generation energy-saving solution, hybrid servo injection machine, is produced. Delta develops the hybrid energy system to meet the industrial needs (mainly comprises Delta VFD-VJ series AC motor drive and Delta ECMA series motor). VFD-VJ Series AC Motor Drive Example of old machine transformation Original injection machine: 180 tons, max. pressure is 140Bar and max. flow is 100L/min. Recommended hybrid energy system: Delta VFD-185VL-J AC motor drive with 11kW motor and 50cc/rev hydraulic pump (max. speed 1800rpm). In the actual application, the customer only needs pressure within 100Bar so it uses 15kW drive, CML hydraulic pump and Gefran pressure sensor (0~10V corresponds to 0~250Bar). See table below for the energy-saving test result. Production Start Time End Time Start Watt End Watt Production Times Total Time(hr) Total Watt Average Watt Large round pipe 09:10 19:00 579 592 1,128 10 13 1.30 Large round pipe 09:10 19:00 592 604 1,193 10 12 1.20 品質至上 信賴第一 追求卓越 QUALITY RELIABLITY EXCELLENT Application Case Industrial Automation BU, Delta Electronics, Inc. Production Start Time End Time Start Watt End Watt Production Times Total Time(hr) Total Watt Average Watt Large round pipe 09:45 19:15 604 615 1,189 9.5 11 1.16 Large round pipe 09:05 19:00 615 627 1,243 10 12 1.20 In traditional injection machine, it takes 6 degrees electricity per hour in the large round pipe. When changing it to Delta hybrid energy system, it only needs 1.2 degrees electricity per hour. Besides the energy-saving result is higher than expectation (up to 75%), it also keeps the levels of productivity and accuracy. 品質至上 信賴第一 追求卓越 QUALITY RELIABLITY EXCELLENT