HIGHLY FAIL-SAFE POWER GENERATOR, PARTICULARLY FOR RAIL SYSTEMS, OR THE LIKE

摘要

A highly fail-safe power generator, particularly for rail systems, comprising a bridge inverter which has two pairs of controllable switching elements (102, 202, 302, 402), arranged in two superimposed rows, a voltage supply connected to the input terminals (3) of the inverter (2), and a power consuming unit connected to the output terminals of the inverter, controller means (4, 4') which generate sinusoidal PWM modulated signals for controlling the switching elements (102, 202, 302, 402), so that the control signals 504, 504', as well as the control signals 604, 604' , are in anti­ phase respectively, a protective fuse (5) on the input terminals for interrupting power when the switching elements are short-circuited, characterized in that one of the two controllers (4) controls the two switching elements (102, 202), arranged on one of the two rows and the other (4') of the two controllers controls the two switching elements (302, 402) of the other row, the two controllers (4, 4') being wholly functionally and electrically independent of each other, whereas an optoelectronic synchronizing connection (7) is provided between the two controllers (4, 4').