The refrigeration chip is very inefficient, and there are special thermoelectric power generation chips.
As long as there is a temperature difference between the two sides, current and voltage will be output. For example, one side is exposed to the air and the other side is against the skin. The 40x40 thermoelectric power generation chip (not a refrigeration chip) sold on Taobao can generate a voltage of 1V every 20 degrees Celsius (by maintaining a temperature difference of 60 degrees between the two sides, you can achieve a voltage of 3.5 V and a current of 3-5A). It is recommended to do this:
1. Use a flat piece of metal and silicone glue to glue it to one side of the power generating piece, then set it down and light a candle underneath to cook the metal piece. (note, not the power generating part). Now the current will come out of these two wires, it's that simple.In order not to damage the electricity generation film, the temperature cannot exceed 180 degrees.
2. Go to Taobao to buy a DC-DC module, which costs less than 10 yuan. It can stabilize the generated power at 5V, so that it can supply power. Charging your phone is no problem, as is the LED lighting.
What should be paid attention to when the generator is overloaded?
The insulation level of the generator stator winding and iron core is F , and the maximum temperature must not exceed the limit temperature of 105°C.
During the rated operation of the generator, the temperature range of the stator winding and iron core is between 60℃ and 80℃.
Detailed information:
Generator temperature and warm-up requirements:
1. The bearing outlet oil temperature does not exceed 65°C and the temperature of the pad does not exceed 80°C.
2. The air temperature at the inlet of the generator should not be lower than 20℃, the maximum should not exceed 55℃, and the temperature difference between the two sides should not be greater than 3℃.
3. When the generator inlet air temperature is between +40℃ and +45℃, for every 1℃ increase, the allowable value of stator current will be reduced by 1.5% from the rated value . ?
4. When the inlet air temperature is +45℃, the apparent power of the generator should be reduced by 7.5%.
5. When the inlet air temperature is between +45℃ and +50℃, for every 1℃ increase, the allowable value of the stator current is reduced by 2% from the rated value.
6. When the inlet air temperature is between +50℃ and +55℃, the allowable value of stator current is reduced by 3% byport to nominal value for each 1℃ increase.
7. The maximum air temperature at the generator inlet must not exceed 55°C. If it exceeds, measures must be taken to reduce the active and reactive loads of the generator. If that doesn't work, please. consult the chief engineer.
8. When the generator inlet air temperature is lower than the rated value, the allowed stator current increases by 0.5% from the rated value for every 1°C decrease. is also allowed to increase accordingly, but the generator is only allowed to increase until the inlet air temperature is +10% lower than the rated value. If the intake air temperature drops further, the current value should not increase any further.
9. The air temperature difference between the generator outlet and inlet should generally not be greater than 25°C. If it exceeds 25°C,the cause must be found.
10. Normal situationUnder normal circumstances, the inlet water temperature of the air cooler should not exceed 20°C and should not be lower than 5°C, otherwise the air cooler should not condense.
11. The maximum air temperature at the generator outlet should not exceed 70℃.
Baidu Encyclopedia - Insulation Level
1 In the event of an accident, the generator and exciter are allowed to operate with accidental overload for a short time of time, and the allowable current for accidental overload is When the generator is overloaded due to an accident, the input and output wind of the generator, the temperature of the stator coil and rotor, the temperature of the The output water of the stator coil and rotor and the operation of the brushes should be closely monitored, and the maximum values should not be exceeded. When the heartant of the generator stator exceeds the allowable value, the electrical personnel on duty should first check the power factor and voltage of the generator, and pay attention to the calculation of the multiple and duration of the current exceeding the rated value, reduce the rotor current. , and reduce the stator current to the maximum allowed value. However, the power factor should not be too high and the voltage should not be too low. If reducing the rotor current cannot reduce the stator current to the allowable value, the distributor should be contacted to reduce the active load of the generator.
2.
When the rotor of a running generator is grounded at one point, the excitation system must be cleaned and inspected. If it is a stable metal ground, the machine must be. stop immediately. If the cause is not found, monitoring must be reinforced and the machine must be stopped for work.itement. When the generator excitation system is single-point grounded, be careful to avoid artificially caused two-point ground faults.
3. When condensation drops (i.e. condensation) appear on the generator stator coil or air cooler, then the generator inlet air temperature should be increased to eliminate the condensation.
4. When the air cooler leaks, a group of leaking coolers should be turned off, and the ground water should be removed at that time. The temperature difference between the two ends of the inlet air does not exceed 3 degrees.
5. When strong circular sparks occur on the surface of the generator slip ring or exciter collector, the collector ring will change color and the collector surface will be burned. When it is black, the cause must be immediately eliminated and the causemust be identified to quickly eliminate sparking and overheating. If it is ineffective, immediately reduce the excitation current or even reduce the current. active load to reduce spark overheating to permitted standards. If it is still ineffective, stop the machine
6. When the generator sends a differential protection disconnect signal, the generator differential protection must be deactivated. disabled immediately, the stator current should be reduced as much as possible and the cause of the secondary circuit of the generator differential converter should be checked. If the cause cannot be found, stop the machine for inspection.
< p>7. When the automatic cabinet breaks down, it should be repaired in time and put into use. The generator is not allowed to operate for a long time under the manual cabinet setting when the manual cabinet is running, during radjustment. Generator active power, you should first adjust the reactive power appropriately to prevent the generator from losing static stability.8. When a short circuit occurs directly at the generator output, the stator coil should be carefully inspected. . If it is found that the stator coil is deformed, the connecting wires are loose, the pads fall off, water leaks and other abnormal phenomena should be stopped for inspection.
9. or fires, remove the Except for regulations on the treatment of generators against fire, the cooling water system must continue to operate and the water supply must not be stopped until the fire is completely extinguished.
10.When a prolonged short circuit occurs outside the generator-transformer group switch, let the pointer of the stator ammeter point to the maximumand the voltage drops suddenly, if the protection device refuses to operate, the generator-transformer group must be immediately disconnected manually.