The main insurance is terminated. In the off state, check if the B+, which is the main positive live wire, at the back of the generator is energized. Then check for arousal. If there is no power in the main live wire, it means the main fuse is broken or the regulator is broken and should be checked clearly. A generator is a device that generates electricity when operated by mechanical power.
Why aren't the cards divided into positive and negative? If it's because the AC is going to change, does it go from fire to zero during the positive half cycle, and from zero to fire during the negative half cycle? If not, is the electricity still flowing? From the live wire, the electricity is much greater during the positive half cycle and the electricity is much lower during the negative half cycle. In that case, why not do it. the fishould they be divided into positive and negative?
First, the voltage and direction of alternating current are constantly changing. You said: "Why aren't the plugs divided into positive and negative? If it changes because of alternating current, does it change from fire to positive? during the positive half cycle? Zero , from zero to hot in the negative half-cycle." Therefore, alternating current has no positive or negative distinction. It is simply divided into active and neutral lines. What you say next is incorrect.
Second, only direct current can be divided into positive and negative, because the direction of voltage and current is always the same. Therefore, do not confuse the live wire, the neutral wire and the positive and negative poles.
The advantages of alternating current are mainly reflected in the production and distribution of energy: use of an alternator based onr the principle of electromagnetic induction, mechanical energy (water flow energy, wind energy...), chemical energy (oil, natural gas...) and other forms of energy can be converted in electrical energy; AC power supplies and AC substations are much cheaper than DC power supplies, and DC converter stations with the same power can be easily scaled up and down; thanks to transformers, which brings great convenience to the distribution of electrical energy. This is a unique advantage of alternating current over direct current.
When transmitting the same power, the wires used in DC transmission are only 2/3~1/2 of the AC transmission.
DC transmission adopts a two-wire system, with earth or seawater as the return line. Compared with three-phase three-wire AC transmission, under the conditions of the same line transmission area de transmission and the same current density, even without taking into account the skin effect, the same electrical power can be transmitted. , and the transmission line and insulation materials can be saved by 1/3．
If the skin effect and various losses (dielectric loss of insulating materials, eddy current losses of magnetic induction, corona losses of overhead lines, etc.) are taken into account, the section cross section of the wire used to transmit the same AC power is greater than or equal to DC 1.33 times the cross section of the wire used for transmitting power. Therefore, the wires used in DC transmission are almost half of those used in AC transmission. At the same time, the structure of DC transmission towers is simpler than that of three-phase AC transmission with the same capacity, and the line corridor occupies less area.