IGBT power interfaces have electro-optic conversion for high isolation

IGBT power interfaces have electro-optic conversion for high isolation

Edith 2018-06-14

IGBT power

The new interfaces, which provide electrical connectivity and optical transmission in the same module, are designed for use with powerful electric drives controlled by IGBT (insulated gate bipolar transistor) semiconductor elements. 

In order to achieve the necessary galvanic isolation between the controller and driver board, data is transferred via fibre-optic cable. 

Electric motors with more than 500kW output, such as those used in ships, trains or pumping stations, use IGBT semiconductors for speed regulation. These can switch large loads using very low control power.

Since insulation and voltage requirements can be very high, plastic optical fibres transmit the signals required for IGBT control. This can provide interference-free and galvanically isolated signal transmission.

For traction control on trains, a solution for up to 16 optical channels is available in a DIN D20 metal housing. In harsh industrial environments, a Han 10A housing variant with IP 65/67 protection offers up to eight channels. 

The range is completed by a pluggable 8-channel module for direct connection to the circuit board in the switch cabinet.

In all variants, the fibres are connected by means of a metal clip which attaches them without any additional optical contact.

Source from:electronicsweekly