If it can be used correctly, it will have fewer failures and a long life. If used improperly, it will be damaged quickly.
Therefore, the following points should be paid attention to in daily use.
(1) The power supply circuits using silicon rectifiers are all negative ground. The ground polarity of the battery must be the same, otherwise, the battery will discharge through the diode, causing the diode to burn out immediately.
(2) When the generator is working, do not use the fire test method to check the silicon rectifier, otherwise it is easy to damage the silicon diode.
(3) If the generator is not charging or the charging current is very small, the fault should be eliminated in time, otherwise it will cause damage to other diodes or generator windings due to damage to one diode.
(4) When checking the rectifier failure, it is not allowed to use a megger or 220V alternating current, otherwise the silicon diode will be burnt out.
(5) It is not allowed to let the rectifier work when the battery is removed for a long time or the battery is in poor contact. After the battery is removed, when the breaker contacts are disconnected, the low-voltage coil will generate a self-induced electromotive force of about 300V, which can easily break down the rectifier.
(6) The rectifier must be used under well-ventilated conditions, and the heat sink must be installed as required; always keep the surface of the rectifier clean, and no oil, dirt, etc. are allowed.
(7) When replacing a damaged silicon diode, the power of the soldering iron should not be greater than 45W, and the soldering time should not be too long. If necessary, clamp the diode (lead) with tweezers for heat dissipation, otherwise the diode will be damaged.
(8) When replacing damaged silicon diodes with other types of silicon diodes, the rated rectifier current and reverse working voltage cannot be lower than the original diode parameters.
(9) When replacing the high-power silicon diode of the three-phase full-wave bridge rectifier, the polarity of the replaced silicon diode must be the same as the original silicon diode. After the silicon diode is installed in the seat hole, it must be a tight fit and should not be loosened, so as to avoid bad contact with the seat hole and affect heat dissipation and burn out the silicon diode. If the seat hole is too loose, a suitable thickness of copper can be used to pad around the silicon diode base. If it is too tight, use a reamer to ream the seat hole appropriately.
(10) Pay attention to the polarity when replacing other low-power silicon diodes. The anode of the diode should be connected to alternating current, and the negative electrode will output direct current.
