How to measure the quality of rectifier bridge stack?

How to measure the quality of rectifier bridge stack?

Judgment of Rectifier Bridge reactor.

The universal bridge stack is marked with polarity (two AC input terminals "?" And two DC output terminals).

So, how to judge the quality of bridge piles quickly and accurately? Use a multimeter (MF500.

If the multimeter is indicated twice, the two probes of the bridge stack are connected by two AC input rules, and then reversed.

If the resistance value is ∞ (infinity), the bridge pile is better; if there is a deviation in the resistance measured once or twice.

Small (tens of thousands or less) indicates that the bridge stack is damaged (one or more internal PN knots are damaged).

How to measure the quality of full-bridge rectifier bridge stack.

When a complete bridge rectifier bridge is obtained, place the negative pole upward, as shown in the following figure (middle two feet).

For alternating current, connect alternating current. When measuring, take the two feet of the AC as a whole), and then transfer the multimeter to the diode.

(that is, the buzzer), and then measure it according to its forward current. The forward current is from "-" to "AC" and "AC"

To "+" is just from top to bottom!

Step 1: "Connect to AC", red wire connected to "- pole", black pen connected to both feet of AC, both facing positive.

The resistance is about 500.

Step 2: from "AC" to "+", the red pen is connected to the two-foot AC and the black pen is extremely connected to the "+". They are all tour guides.

The resistance is about 500.

Step 3: measure the reverse resistance of steps 1 and 2, namely infinity 1.

(in the first step, the reverse resistance measurement method from "AC" to "-" is connected to the two pins of AC, and the black line is connected to "-".

Pole, both are reverse resistors, which is infinite.

(in step 2, the reverse resistance measurement method converts "+" to "AC", with a red wire connected to the "+" pole and a black wire connected to AC 2.

The pins with both reverse resistors are infinite.

Step 4: measure each other before alternating current, the resistance value is infinity 1, the measured resistance value indicates that the diode is normal.

If the measurement is wrong, there is a problem!