Why can't the positive and negative poles of a direct current capacity be connected in reverse?

Aiya, if the positive and negative poles of the generator slip ring were connected in reverse, he couldn't just leave it alone. First of all, he had to quickly cut off the power supply. He couldn't let it continue to work in the case of a wrong connection. Otherwise, it might cause a lot of trouble, such as damaging the equipment. After that, he had to carefully re-connect the positive and negative poles. If he wasn't sure what to do, it would be best to find an experienced technician to deal with it. After all, they were professional and could guarantee that the matter would be resolved safely and correctly. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

For an ordinary direct current motor (such as a toy motor), as long as the voltage connected was within the rated voltage range, the positive and negative poles would not burn the motor because the winding was made of copper wire. After the direct current was connected, the winding was equivalent to a resistance. The resistance had no direction, and the reverse connection of the power supply would only cause the motor to reverse. For a large direct current motor, if the two ends of the shunt-excited direct current motor are reversed, the two ends of the series-excited direct current motor will not be burned when the two ends of the series excited direct current motor are reversed, but the direction of rotation will not change. If you want to change the direction of rotation, you need to change the direction of the exciting current or the direction of the current of the armatures. For a Brushless Direct Current motor, the positive and negative poles would not rotate. If it heated up for a long time, it might burn out the components. Because it relied on Hall signals to transmit to the controller to control the rotation of the motor, it could not work normally after the power supply was connected in the opposite direction. If it heated up for a long time, it might burn out the electronic circuit components in the motor. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

If the positive and negative poles of the motorcycle battery were connected in reverse, there could be many serious consequences. It was not as simple as the battery running out of power. First of all, it might blow the fuse and cause the entire car to lose power. Secondly, it could even burn the wires and other parts of the motorcycle. It could even cause the motorcycle to catch fire and the battery to be scrapped. In addition, when the positive and negative poles of the battery were reversed, there would be a continuous discharge, which was also a kind of damage to the battery itself. Therefore, when the positive and negative poles of the motorcycle battery were reversed, the battery was out of power. It was likely that the battery had been damaged and needed to be checked and repaired. If necessary, the battery should be replaced. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

If the positive and negative poles of the charger were reversed, the resistance of the charger and the electronic components of the power supply might be burned. When the charging connection was reversed, there would be a large current flowing through the battery and the charger. Because the current was too high, the battery would heat up violently, causing the plate to swell and be damaged. The active material would fall off, reducing the power storage and service life. The charger might have a situation such as burning the high-power resistance surface at the output end. For a battery charger with anti-reverse connection function, if the positive and negative poles were connected in reverse, there would be no voltage output. In this case, the charger itself might not burn the components, but it would not work normally. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

When the positive and negative poles of the electric car charger were reversed, it would not explode, but it would burn the charger's rectify component and high-frequency transformer. Because the voltage of the battery and the charger were added during charging, the current would flow into the charger in the opposite direction and would not be controlled by the circuit, which might burn the charger. If the charger fuse is not broken, if the output part of the copper foil is blown after opening the charger (this situation is usually caused by the positive and negative poles), it may return to normal after connecting the broken copper foil and replacing the damaged components. There were also cases where the E-shaped circuit was burned, and it could be repaired by reconnecting it (this method was shared by non-professionals). In addition, a short period of negative and positive reverse connection may not have much effect on the battery, but it will burn the battery over time. The degree of battery damage is directly proportional to the length of reverse connection. If the battery is charged in reverse, it is equivalent to a short circuit, and the battery may burn or explode. When using, try to use the original charger or the same model to avoid the occurrence of the positive and negative pole connection. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Different brands of camera batteries had different positive and negative labels. For example, Lingye camera batteries had positive and negative labels; Canon original batteries did not have positive and negative labels; Green Giant Rechargeable camera batteries had positive and negative contacts in the slot and positive and negative labels beside them. In the case of a camera charger connected to a camera, the positive and negative poles were not on the side of the camera or charger alone. Nowadays, it was mostly a wire or plug type, usually with the positive pole inside and the negative pole outside. In addition, in the charging flashlight, the red power cord was connected to the positive battery, which could be used as a reference, but the connection of the camera battery needed to be determined according to the specific product. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

For a 48V shunt-excited direct current motor (the motor junction box has four terminal blocks, two excitations, and two armatures), as long as the switch is used to change the voltage of the armatures, the direction of the motor can be changed. The following methods could also be used: 1. If it was manually controlled, a mechanical switch could be used to realize the forward and reverse rotation of the motor. A double-pole double-throw switch could be used. The connection method was as follows: When the switch was turned up, the A pole of the direct current motor was connected to the true voltage of 48V, the B pole was connected to the ground voltage of 48V, and the motor was rotated forward (reverse). When the switch was turned down, the B pole of the direct current motor was connected to the true voltage of 48V, the A pole was connected to the ground voltage of 48V, and the motor was rotated backward (forward). 2. A two-way relay was used to realize the positive and negative rotation of the direct current motor. When the relay is not working, the A pole of the direct current motor is connected to Vac (48V), the B pole is connected to Ground, and the motor is rotating forward (reverse); when the relay is connected, the B pole of the direct current motor is connected to Vac (48V), the A pole is connected to Ground, and the motor is rotating backward (forward). 3. The positive and negative rotation circuit was formed by two relay (each relay had three contacts, normally open, normally closed and public, respectively. The action of each group of contacts was controlled by two groups of coil). The positive and negative rotation of the motor was realized by controlling the power supply and power failure of the two groups of coil: - When the two sets of coil are cut off, the motor is in a stopped state; - When the first group of coil is energized and the second group of coil is de-energized, the current loop is formed to make the motor rotate forward; - When the second group of coil is energized and the first group of coil is de-energized, the current loop is formed to cause the motor to rotate in reverse; - When both sets of coil were energized, the motor stopped. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Generally, the zero line of an ammeter or a voltage meter was on the left side, and the pointer was tilted to the right when it was energized. If the positive and negative terminal of the voltage meter or ammeter were connected in the opposite direction, the pointer would deflect in the opposite direction. This situation was more obvious in the direct current meter, but the alternating current meter did not have a positive and negative pole, so there was no such problem. In severe cases, it was easy to burn the meter if the positive and negative poles were connected in reverse. If the meter was damaged, it might affect the circuit. For example, in some circuits, if the voltage meter or ammeter was damaged, it would affect the measurement results or the normal operation of the circuit. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>