For what purpose are permanent magnets primarily used?

Permanent magnets are primarily used in small portable alternators due to their ability to create a stable magnetic field without the need for an external power source. This characteristic makes them ideal for applications where size, weight, and reliability are critical factors, such as in portable power generation.

In small portable alternators, permanent magnets provide the necessary magnetic field to induce an electrical current when the alternator is mechanically driven. This results in efficient operation and ensures that the alternators can produce electricity without relying on external energy, making them suitable for various applications where mobility and compactness are required.

While permanent magnets can also find applications in heavy machinery, home appliances, and industrial motors, their primary strength lies in portable and compact power generation solutions, as demonstrated in small alternators.