Click on the image to enlarge
Instruments For Testing Your Innovations
A four quadrant power supply is a lab power supply that can output both positive or negative voltage. It can sink or source current regardless the voltage is positive or negative. In contrast, most laboratory power supply can only source current and cannot sink current. Conventional power supply is operating in the first quadrant as shown in Figure 1. In the first quadrant, a common power supply output voltage is positive and source current only. A 4-
Figure 1. IV Diagram of a power supply showing all four quadrants.
Figure 2. Battery simulator connection using while operating in quadrant 1 and 2.
Figure 3. Photovoltaic cell (solar panel) test and characterization using a four-
Figure 4. Photovoltaic cell current-