Homemade wind turbine. Charging batteries. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Homemade wind turbine. Charging batteries. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Alternative energy sources

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When a 6-volt generator is installed on the wind turbine, it is easy to charge the batteries for the cocoa lamps of the receiver, but it is difficult to charge anode batteries from this wind turbine. To do this, you need to divide the battery of anode batteries into groups of three cells and connect these groups for charging in parallel with each other. If, for example, there is a battery of 80 cells (for 160 V), then 26 such groups are obtained. The two remaining elements in this case are not used. After the battery is charged, it is necessary to connect all groups of elements in series again.

With a 12-volt generator and two 12-volt batteries, charging anode batteries is simplified. In this case, the 12-volt batteries are charged first. Then they are connected in series, and the anode batteries are charged from the battery thus obtained, connecting them into groups of 10 elements, as shown in Fig. 14. Charging is carried out through rheostat 3, making sure that the charging current does not exceed 0,8 A for each group of batteries. This charging method was used by the radio amateur A.P. Domaretsky, and this allowed him to have 3,5 times fewer battery connections and cuts than when charging.

Homemade wind turbine. Charging batteries
Fig.14. Charging scheme for anode batteries: 1 - glow batteries; 2 - anode batteries; 3 - rheostat; 4 - relay

The batteries are charged as follows. Batteries (6-volt) are connected to the appropriate terminals on the shield (the positive pole, "plus" of the battery, must be connected to the positive pole of the generator, and the negative pole, "minus" of the battery, to the negative pole of the generator). As soon as the voltage from the generator reaches 7,2-7,4 V, relay 4 will connect the batteries. If the batteries are charged to less than 7,3 V, then the current passing from the generator to the batteries will charge them. If the batteries have a higher voltage than the generator, then the reverse current relay will disconnect the batteries.

For normal operation of the installation, it is desirable to have a double set of 6- or 12-volt batteries with a capacity of at least 100 Ah. Such batteries can be made up of two parallel-connected batteries with a capacity of 60 Ah. With a smaller battery capacity, the full power of the wind turbine is not used. In addition, with a strong wind, the generator voltage rises noticeably, and the fuse in the field winding circuit can overheat.

Glow batteries should be kept permanently connected to the charger so that they are always charged when there is wind. Only with fully charged batteries can the wind turbine be stopped.

Once every 1,5-2 months, when the weather report indicates that a period of strong winds is approaching, the batteries should be discharged and then recharged. Such a charge-discharge makes it possible to significantly increase the service life of batteries, which generally last many times longer in a wind power plant than in cars, and need only timely pouring of distilled water into the electrolyte.

It should be noted that the batteries can also be charged while the radio is in operation. It is only necessary that the generator housing be well connected to the ground wire and that the ground around the ground does not dry out.

Author: Perli S.B.

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