振动试验仪器

The output circuit of each independent power amplifier box is equipped with a 50A fast fuse. There is a striker on the fuse, which is a micro-switch normally open switch. When the fuse burns out due to overcurrent, the striker action switch closes and an alarm is prompted on the circuit.

chunyang

For power supply parallel connection, a small resistance can be connected in series for temporary use, and the specific calculation needs to be based on measurement. The current sharing of the power supply output stage in parallel will be considered during circuit design. For example, a large number of tubes are connected in parallel in electric vehicles. The specific current sharing circuit needs to consider the device characteristics. If you are interested, find relevant circuits to study.

As for the energy storage battery pack, it cannot be used temporarily, so it is necessary to work hard on the circuit design. However, the parallel connection of battery packs does not need to and cannot truly achieve current sharing, but only limits the maximum current.

lkh747566933

I am studying how to evenly distribute the current when multiple MOS output 100A high current?

beyond_笑谈

MOSFETs are connected in parallel in high-power motor drive products without considering current sharing.

lkh747566933

beyond_笑谈Published on 2024-5-9 13:08 MOSFETs are connected in parallel in high-power motor drive products without considering the current sharing issue

Yes, I currently have this kind of design, and I would like to pay attention to everyone’s solutions.

beyond_笑谈

lkh747566933 posted on 2024-5-10 19:21 Yes, I currently have this design, and I'm just paying attention to everyone's solutions.

If there are other optimizations for this solution, please share the design. It is likely that the drive output needs to be adjusted by phase current.

se7ens

That’s a good question indeed.

Two LDOs with feedback control can achieve current sharing output

Of course, additional control circuits need to be added to adjust the size of the feedback resistor

TI has introduced a similar solution

As for the current sharing output of the battery pack, there should be a mature solution at present. For example, the battery pack of an electric vehicle

Active balancing technology can achieve uniform charging and discharging of the battery

Of course, there are also simpler passive balancing solutions, which are relatively less efficient.

旷淬淬

The output of the power chip may be far from what the load requires