Capacitor bank, power cell and variable frequency drive

摘要

A capacitor bank (1) comprises: a plurality of capacitors (10), a plurality of resistors (20), each of the capacitors (10) being in series with at least one of the resistors (20), a plurality of diodes (30), each of the diodes being in parallel with one of the resistors. A power cell comprising a diode rectifier, a plurality of Insulated Gate Bipolar Transistors and a capacitor bank. An electrical variable frequency drive comprising a plurality of such power cells.