![power electronics - 2 / 4 quadrant switches - how can current have opposite direction to voltage? - Electrical Engineering Stack Exchange power electronics - 2 / 4 quadrant switches - how can current have opposite direction to voltage? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/3bc47.jpg)
power electronics - 2 / 4 quadrant switches - how can current have opposite direction to voltage? - Electrical Engineering Stack Exchange
![KEPCO, INC.: DC POWER SUPPLIES/DC POWER SUPPLY: BIPOLAR, OPERATIONAL AMPLIFIER, RACK MOUNT OR BENCH, GPIB SCPI ANALOG PROGRAMMABLE, DIGITAL, LINEAR - SERIES BOP KEPCO, INC.: DC POWER SUPPLIES/DC POWER SUPPLY: BIPOLAR, OPERATIONAL AMPLIFIER, RACK MOUNT OR BENCH, GPIB SCPI ANALOG PROGRAMMABLE, DIGITAL, LINEAR - SERIES BOP](https://www.kepcopower.com/bop-out.gif)
KEPCO, INC.: DC POWER SUPPLIES/DC POWER SUPPLY: BIPOLAR, OPERATIONAL AMPLIFIER, RACK MOUNT OR BENCH, GPIB SCPI ANALOG PROGRAMMABLE, DIGITAL, LINEAR - SERIES BOP
![PDF] FOUR-QUADRANT POWER SUPPLIES FOR STEERING ELECTROMAGNETS FOR ELECTRON-POSITRON COLLIDERS | Semantic Scholar PDF] FOUR-QUADRANT POWER SUPPLIES FOR STEERING ELECTROMAGNETS FOR ELECTRON-POSITRON COLLIDERS | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/c4b4b0e70518c192f3382d37e025c82fd5e8d491/1-Figure1-1.png)