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marine battery voltage gauge need a fuse
The marine generator is an alternating current. It is converted into a direct current through six rectifier diodes and then sent to the battery through a fuse. The voltage regulator controls the rotor voltage to stabilize the output voltage of the generator at 14v. The nominal voltage of the battery at 12v can reach 13.8v at most.
The rotor of the DC excited synchronous generator is driven by the prime mover (i.e. the engine) to rotate at the speed n (rpm), and the winding resistance of the three-phase stator induces the AC potential. If the stator winding resistance is connected to the electrical load, the motor will have AC power output. The AC power will be converted into DC power through the rectifier bridge inside the generator and output from the output terminal.
The alternator is divided into two parts: stator winding and rotor winding. The three-phase stator winding is distributed on the housing according to the electrical angle of 120 degrees different from each other. The rotor winding is composed of two pole claws. In the low speed range, due to the low speed of the generator, the series output of the three-phase windings increases the output voltage of the generator, which greatly improves the low-speed charging performance of the generator. In the high speed range, with the increase of the generator speed, the inductance of the three-phase windings connected in series increases, the internal voltage drop increases, and the armature reaction is strengthened, so that the output voltage decreases. At this time, the induced current generated by the original three-phase windings A, B and C is relatively large due to the small internal voltage drop, ensuring the power output at high speed.
If there is no fuse, the engine may not start, or the starter may not work or barely work. Connect the voltmeter to the positive and negative poles of the battery, and then turn the key for ignition. At the moment of power on, if the voltage indication suddenly drops below 8 volts, there must be something wrong with your battery. There is no harm without a voltmeter, which can be replaced by a small 12V bulb and a small section of power cord. The method is the same. If the bulb suddenly darkens significantly, it also indicates that the battery is aging. In many cases, the battery has failed, but the headlights can still be lit. This is not surprising. Need to check the grounding circuit and fuse. So marine battery voltage gauge need a fuse.
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