高速变频器-用于PCB电路板钻孔机中的多主轴操作 

针对PCB电路板钻孔设备制造商客户的需求，西伯麦亚开发了一款结构紧凑且性价比极高的变频器，它适用于现有的机器设计，并允许多达8个高速主轴的无传感器运行。

Client requirements:

The client is a manufacturer of PCB drilling machines and wished for a frequency converter that can be optimally integrated into his existing machine construction.

The existing servo amplifiers should supply the frequency converter with power from the DC link.

For the purpose of saving costs one central frequency converter should operate up to eight high-speed spindles in the speed range up to 480,000 rpm without sensor.

Customized Solution by SIEB & MEYER:

The customized solution is based on the serial device FC2 that features a device topology with controlled DC link. This permits the operation of low-inductive asynchronous motors without additional motor chokes via pulse amplitude modulation (PAM) up to an output frequency of 8,000 Hz (480,000 rpm). The functional spectrum of the standard device already includes the parallel operation of up to eight asynchronous motors as well as the separate evaluation of the temperature sensors.

SIEB & MEYER adapted the electronics of the power supply unit and the device construction to the machine conditions. During this process the engineers were able to reduce not only the installation space but also the wiring work.

The most important details in short:

• supply voltage 350 VDC
• PAM modulation, controlled DC link
• output: 3 x 0..230 VAC, 0..8,000 Hz, S1: 13.2 kVA
• integrated evaluation of up to eight temperature sensors
• sensorless operation of up to eight asynchronous motors