Assembly comprising a generator and electric motors, for a vehicle air-conditioning or refrigeration system

An assembly for a vehicle air-conditioning or cooling system, comprising:

• a compressor intended to be driven by a heat engine,
• an auxiliary electric motor for driving the compressor when the compressor is not or cannot be driven by the heat engine,
• a generator with permanent magnets having a shaft which can be driven in rotation by the heat engine, the generator and the auxiliary electric motor being disposed on this shaft,
• one or more electric motors of condensers and/or of evaporators of the vehicle air-conditioning or cooling system, said electric motors being direct current variable-speed motors configured to be powered by a direct current, the generator powering the one or more electric motors of condensers and/or of evaporators through a converter configured to supply the direct current, wherein the generator is configured to supply an output voltage of between 12 V alternating current and 36 V alternating current or between 330 V alternating current and 660 V alternating current such that the converter is configured to transform the output voltage into a direct current output voltage.