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Where are permanent magnet alternators used?
In PMG (Permanent Magnet Generator) or permanent magnet alternators, the poles are made of permanent magnets. The energy obtained from the output of permanent magnet alternators cannot be used directly. The poles of the synchronous alternators used in generators are made of coiled electromagnets and a magnetic field is created by applying current to the poles. In this way, while the alternator is loaded, more current can be given to the poles while keeping the output voltage of the alternator constant, and less current can be given to the poles when the load is taken from the alternator. Since the pole magnetic field cannot be controlled in permanent magnet alternators, it is not used directly. It is generally used to charge the battery where it is not possible to keep the speed constant. If the speed cannot be kept constant in the system, the frequency is also variable. This is another reason why the energy obtained from permanent magnet alternators cannot be used directly.
With systems using permanent magnet alternators, the battery is charged. Therefore, a battery bank is needed. It also uses an inverter to increase the battery charging voltage to 220 volts or 400 volts if three-phase.
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#generator
#Magnetic field
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