How to control the reverse current

qepdcri

How to control the reverse current [Copy link]

 

UPS uses thyristor rectification and IGBT inversion. When the motor is connected, the motor reverses to generate reverse power. Some people suggest replacing the thyristor rectification with IGBT rectification to achieve power feedback to the grid, but this is a big change. Is there any way to prevent the DC voltage from rising to the protection point when it is reversed?

dukedz

In parallel with power resistor or heating wire, it will automatically turn on when the voltage exceeds a certain threshold

maychang

Is there any way to prevent the DC voltage from rising to the protection point when reverse charging occurs?

What you said before [replacing the thyristor rectifier with IGBT rectifier to realize power feedback to the grid] is the solution.

qepdcri

maychang posted on 2024-8-13 09:43 [Is there any way to prevent the DC voltage from rising to the protection point when it is reversed?] You said earlier [Replace the thyristor rectifier with IGBT rectifier to achieve...

The changes are large and the cost is high, so it cannot be adopted