Energy supply for a multiphase drive

A multiphase drive system, comprising:

• a multiphase drive having an input DC voltage of less than 100 V and a rated power of more than 300 KW, said multiphase drive including converter modules, each of the converter modules designed to supply power to bars of a stator of the multiphase drive such that voltage and/or current of each of the bars of the stator are controlled or regulated separately by one of the converter modules;
• an energy supply device electrically connected to connections of the multiphase drive and designed to generate a DC voltage to be supplied to the multiphase drive from an AC voltage, present at a grid connection point, of an energy supply grid, said energy supply device including a voltage converter designed as a DC-DC converter, a line section between the voltage converter and the connections of the multiphase drive for transmitting electrical energy, by way of DC voltage, to the multiphase drive with a rated voltage of less than 100 V, and a rectifier, said voltage converter designed to step down a voltage generated by the rectifier to a voltage of less than 100 V with which the multiphase drive is operated at the connections thereof;
• and
• a common cooling system designed for the rectifier and a converter formed by the converter modules so that the rectifier and parts of the multiphase drive are configured to be cooled using a same cooling principle.