What is a thyristor semiconductor primarily used for?

A thyristor semiconductor is primarily used for controlling rectifying electrical devices due to its unique ability to switch on and off based on the input signals. This semiconductor device can handle high voltages and currents, making it suitable for applications in power control systems. When a triggering signal is applied, the thyristor allows current to flow, and it continues to conduct until the current drops below a certain level. This characteristic makes it particularly effective in controlling power in circuits, allowing for efficient regulation of electrical energy.

In contrast, while some options imply functions that could be related to thyristors, they do not reflect the primary application of these devices. For instance, increasing voltage and converting alternating current may involve different types of devices such as transformers and inverters. Storing electrical energy pertains more to capacitors and batteries, which serve a different purpose in a circuit. Thus, the most accurate representation of a thyristor's primary function is its role in controlling rectifying electrical devices.