What types of parallel connection are there for power supplies?
In general, you can classify power supplies, that can be connected in parallel into two groups: power supplies with and without load sharing.
In the case of power supplies without load sharing, it is not possible to ensure a balanced current distribution. This can lead to overload and overheating of a power supply, which can develop into a failure of the device.
Power supply units with load sharing, on the other hand, ensure a balanced current distribution. This prevents one or more devices from being overloaded. A distinction can be made here between active and passive load sharing.
In active load sharing, connected control circuits ensure exact synchronization of the output voltages among the power supplies. However, this is very complex and susceptible to interference.
https://www.pulspower.com/blog/parallel-connection-and-redundancy-of-power-supplies-what-is-the-difference/#:~:text=By%20connecting%20two%20or%20more,of%20the%20system%20or%20machine.