Voltage inverter has to be reconfigured tolerence of failures

摘要

Voltage inverter provided with four switching cells (q1 to q4) to be connected to the terminals of a dc voltage source (v dc), each comprising two switches (i11, i12, i21, i22, i31, i32, i41, i42) in a semi - conductor mounted in series, these switches having a common point (a0) to be connected to a source of alternating current (mac) with three phases (p1, p2, p3) and a neutral (n), the connection being made on a phase (p1, p2, p3) for three cells (q1, q2, q3) and on the neutral (n) for the fourth (q4). Each cell (q1 to q4) cooperates with a device for electrical insulation (s1, (s2.1 and s2.2)) in a semi - conductor to be in an off state in the event of failure of the cell, this device of the insulation (s1, (s2.1 and s2.2)) being placed either on the connection to the source of alternating current (mac), or on the connections to the terminals of the dc voltage source (v dc).