What to do if the rectifier bridge is damaged? What is the cause of the burnout of the rectifier bri

Rectifier module is damaged, usually due to grid voltage or internal short circuits. In the case of excluding internal short circuits, the rectifier bridge is replaced.

2. The inverter module is damaged, usually caused by motor or cable damage and drive circuit failure.

3. There is no display when powering on, which is usually caused by the damage of the switching power supply or the damage of the soft charging circuit, so that the DC circuit has no DC current.

4. Display overvoltage or undervoltage, usually caused by input phase loss, circuit aging and circuit board moisture.

5. The display of overcurrent or short circuit to ground is usually due to damage to the current detection circuit. Such as Hall elements, op amp circuits, etc.

6. The power supply and the driver board start to display overcurrent. It is usually caused by damage to the drive circuit or inverter module.

7. The no-load output voltage is normal, and the overload or overcurrent is displayed after the load. Usually due to improper parameter setting or aging of the driving circuit, the overcurrent protection function is caused by module damage.

Rectifier bridge. It is to put four diodes.

If it is done together, if it is damaged, even if it only penetrates a diode, the entire rectifier bridge must be replaced, and the parameters of the replaced bridge are not lower than the original parameters.

with a multimeter. Any AC input to positive output is unidirectional.

The output is negative to any AC input and is one-way conducted.

There is no conduction between the other feet.

If you want to measure the reverse withstand voltage, you need a semiconductor tester to complete it.

A rectifier bridge is an electronic component that converts alternating current into direct current. If the rectifier bridge burns out, there may be several reasons:

Overload: If the load on the rectifier bridge exceeds its rated power, it may cause it to overheat and burn out. This is usually because the rectifier bridge is connected to a circuit or device that is ultra-quiet past its design capacity.

Short circuit: If there is a short circuit between the positive and negative poles of the rectifier bridge, it may cause a large amount of current to pass through the rectifier bridge, resulting in overheating and burnout. This can be caused by damage to components, poor line contact, excessive vibration, or aging equipment, among other reasons.

Overvoltage: If a rectifier bridge is subjected to a voltage shock that exceeds its rated voltage, for example due to a lightning strike or power failure, it can cause damage.

Too high temperature: If the rectifier bridge is in a high temperature environment and does not have sufficient heat dissipation capacity, it can also cause damage.

Quality issues: During the manufacturing process, there may be issues such as poor component quality, poor welding, or design defects that can lead to damage to the rectifier bridge.

If the rectifier bridge burns out, you need to find the cause and solve it, and replace the rectifier bridge after Chunchun. If you are unsure of how to diagnose or resolve the issue, it is recommended that you seek professional help.

There may be several reasons for the burnout of the rectifier bridge:

1.Overload or overvoltage: If the rectifier bridge is subjected to more current or voltage than it can withstand, it will cause the rectifier bridge to burn out.

2.Short circuit: A short circuit between the positive and negative poles of the rectifier bridge will cause excessive current and burn out the rectifier bridge.

3.Excessive temperature: If the leakage bridge is operated at high temperatures for a long time, it will cause the device to age, fail, and burn out.

4.Quality problems: If there is a problem with the quality of the rectifier bridge itself, such as defects or damage in the manufacturing process, it may also cause the rectifier bridge to burn out.

5.Other problems, such as noise interference in the use environment, poor circuit board connection, electrolytic capacitor failure, etc., may also cause the rectifier bridge to burn out.

Burned out at high temperatures.

Most rectifier bridges are burned out due to overload and high temperature, so high temperature and high load should be avoided.

Short circuit. At the moment of breaking the circuit, it is also possible to burn down the rectifier bench and leak bridge.

The voltage is too high. Exceeding the rated voltage of the rectifier bridge will also burn the mountain and destroy the rectifier bridge.

Rectifier bridges are a key component in electronic devices that are primarily used to convert alternating current into direct current. When the rectifier bridge is broken, the following manifestations may occur: lap mold belt 1

No output: After the rectifier bridge is damaged, it cannot convert AC power to DC power normally, resulting in the device being unable to output current or voltage. 2.

Abnormal current: The rectifier bridge fault may cause the output current to fluctuate or be unstable, and it can be seen that the current will be too large or too small. 3.

Voltage abnormality: After the rectifier bridge is damaged, the output voltage may exceed the set range, too high or too low. 4.

Overheating: When the rectifier bridge is damaged, the current may be blocked or overloaded, resulting in abnormal heating of the rectifier bridge. 5.

Noise or interference: Faulty rectifier bridges may cause electromagnetic interference, generate noise or affect the normal operation of other electronic equipment. 6.

Abnormal odors or scorch marks: In some cases, a damaged rectifier bridge may release an unusual odor or even scorch code marks.

What is the behavior of the rectifier bridge after damage? After the rectifier bridge is damaged, the whole circuit will not work, cannot be rectified, and there is no DC input in the circuit. If the diode is punctured, it may cause a short circuit.

The function of the rectifier bridge is to convert alternating current into direct current. Rectifier Bridge Module Damage and Its Causes: Rectifier damage is usually caused by a short circuit in the grid voltage or an internal short circuit.

If the internal short forest road is eliminated, replace the rectifier bridge. Inverter module damage is usually caused by damage to the motor or cable, as well as a faulty drive circuit. If the power-on is not displayed, the DC circuit does not have DC.

Shows overvoltage or undervoltage, typically caused by input phase loss, circuit aging, and board moisture. Showing an overcurrent or short circuit to ground is usually due to a damaged current sense circuit. Examples include Hall elements and operational amplifier circuits.

Power on and the driver board shows overcurrent. It is usually caused by damage to the drive circuit or inverter module. The no-load output voltage is normal, but it shows overload or overcurrent after loading.

Usually, the overcurrent protection function is caused by improper parameter setting, aging of the driving circuit, and damage to the module. @2019

How to judge the good or bad of the rectifier bridge is as follows:

Before measuring the rectifier bridge, it is necessary to identify the polarity of the rectifier bridge interfaces. <>

Most of the rectifier bridges are marked with the symbol "+" and "one" (where "+" is the positive pole of the output voltage after rectification, "one" is the negative pole of the output voltage, and two "" are the AC voltage inputs), and it is easy to determine each electrode.

Individual rectifier bridge labels cannot be identified for some reasons, but they can be identified by the following two methods:

1. Appearance discrimination method. The full bridge consists of four diodes with four pins. The connection point of the negative pole of the two diodes is the "positive pole" of the DC output of the full bridge, and the connection point of the positive pole of the two diodes is the "negative pole" of the DC output of the full bridge.

Most of the rectifier bridges are marked with the "+" symbol. (where "+" is the positive pole of the output voltage after rectification, "-" is the negative pole of the output voltage, and " is the input terminal of the AC voltage), it is easy to determine each electrode. <>

2. Multimeter detection method. If the positive and negative polarity marks of the component have been blurred, it can also be detected with a multimeter.

When detecting, set the multimeter to the "R 1K" block, connect the black watch pen to a pin of the full-bridge assembly, and use the red watch pen to measure the remaining three pins respectively, if the measured resistance value is infinity, then the pin connected by the black watch pen is the DC output positive pole of the full-bridge assembly; If the measured resistance values are within the range of 4 l0k, then the pins connected to the black table are the DC output negative poles of the full-bridge module, and the other two pins are the AC input pins of the full-bridge assembly.

Measurement method of rectifier bridge:

During the detection, the forward and reverse resistance values of each rectifier diode between the "+" pole and the two "poles" and the "pole" and the "two poles" (the same measurement method as the ordinary diode) can be measured by the multimeter respectively, and the whole bridge can be judged whether the whole bridge is damaged. If the forward and reverse resistance values of a diode in the bridge are both 0 or infinity, it can be judged that the diode has broken down or is damaged by open circuit.

Some netizens summed up the seven-character formula of "one or four single passes, two or three breaks". The general idea is to remove the rectifier bridge, with the pointer meter RX1K file detection, one or four feet and any foot are one-way conduction, that is, the so-called "one or four single pass", two feet and three feet are always broken when the measurement is not passable, that is: "two or three broken", if you meet this condition, it is good, and vice versa.

Generally, the heat sink is not large enough, the overload impulse current is too large, and the heat cannot be dissipated.

1. The load is short-circuited and the insulation is not good. Caused by excessive load current;

2. Frequent start-stop power supply, if the inductive load belongs to the energy storage element! Then a back EMF will be generated. Reverse breakdown of the rectifier element. At the time of bridge rectification, only one is broken. then the stool and the bridge arm will be burned out;

3. The use time of individual components is long, and the quality decreases;

4. The input voltage is too high.

The rectifier bridge is to seal the rectifier tube in a shell. It is divided into full bridge and half bridge. A full bridge is to seal the four diodes of the connected bridge rectifier circuit together.

The half-bridge is to seal the half of the four diode bridge rectifiers together, and the two half-bridges can form a bridge rectifier circuit, and a half-bridge can also form a full-wave rectifier circuit with a center tap of the transformer.

Summary. Hello, glad to answer for you, there may be parallel branch circuits. When the rectifier bridge is damaged, some electronic components in the circuit can bypass the current through the rectifier bridge, in which case, even if the rectifier bridge is damaged, there will still be voltage in the lines behind it.

Hello, glad to answer for you, there may be parallel branch circuits. When the rectifier bridge is damaged, some electronic components in the circuit can bypass the rectifier and start the bridge, in this case, even if the whole finger hail bridge is damaged, there will still be voltage in the back line.

Excuse me, but please go into more detail?

There is also the possibility of capacitance. Capacitors can store charge, i.e., they can supply voltage even after the power supply is de-energized. When the rectifier bridge fails, the capacitor can continue to supply voltage to the lines behind.

There is also the possibility of inductance. An inductor can store and release current to provide a voltage verge bond even after a power supply is de-energized. When the rectifier bridge fails, the inductor can continue to supply voltage to the subsequent lines.

Summary. A rectifier bridge is an electronic component commonly used in half-wave, full-wave and three-phase rectification, which is converted into a DC voltage output after the AC voltage is input. If the rectifier bridge is damaged, some fault phenomena may occur, such as the output voltage drops or disappears, high current or heat, etc., but the damage to the rectifier bridge does not mean that the output voltage is completely lost.

The voltage of the later lines may be due to the fact that some of the circuits before the rectifier bridge are still working normally, and the DC voltage can still flow to the later circuits through them. However, it should be noted that if the rectifier bridge does fail, the cause should be found as soon as possible and replaced or repaired, otherwise it may have a negative impact on the line and the connected equipment.

A rectifier bridge is an electronic component commonly used in half-wave, full-wave and three-phase rectification, which is converted into a DC voltage output after the AC voltage is input. If the rectifier bridge is damaged, some fault phenomena may occur, such as the output voltage drops or disappears, high current or heat, etc., but the damage to the rectifier bridge does not mean that the output voltage is completely lost. The voltage of the line behind the gear stove is still feasible because some of the circuits before the rectifier bridge are still working normally, and the DC voltage can still flow to the back circuit through them.

However, it should be noted that if the rectifier bridge does fail, the cause should be found as soon as possible and replaced or repaired, otherwise it may have a negative impact on the line and the connected equipment.

Why does it continue to flow to the back.

After the rectifier bridge is broken, the circuit entering the rectifier bridge will be interrupted, and the current of the power supply cannot pass through the rectifier bridge, but the ruler line behind the rectifier bridge has not been cut off, and the connection between them still exists, so the current can continue to flow to the back of the line Bichen. When the current flows through the rectifier bridge, although it cannot be rectified (turned into a DC signal) as before, it is still a sinusoidal wave form of AC signal, this signal can continue to be transmitted along the circuit, and finally consumed by the load, so there will still be a power supply voltage in the future.

Good. How to look at it is half-wave rectification and full-wave rectification.

Half-wave rectification and full-wave rectification are both methods used to convert alternating current into direct current. The half-wave rectifier can only be turned on in the positive half-cycle, and the output current is only positive half-cycle, and the negative half-cycle current is 0, so the efficiency is relatively low. The full-wave bright rectifier uses four diodes to conduct both positive and negative half cycles of the AC signal, thereby achieving rectification.

The output current shows the full waveform of the positive and negative half-cycles of the electrical signal, so the load current is larger and wider than the half-wave rectifier, and the efficiency is higher. In general, it is possible to distinguish between half-wave and full-wave rectifier circuits by observing the circuit connections and the number and type of component masks.