likestrømforsyning

A likestrømforsyning, often translated as a constant current power supply, is a power supply that outputs a regulated constant current. Unlike a constant voltage power supply which aims to maintain a stable voltage regardless of the load, a constant current power supply adjusts its output voltage as needed to ensure the current flowing through the load remains at a predetermined level. This is particularly useful in applications where maintaining a specific current is critical for device performance or safety.

The primary function of a likestrømforsyning is to provide a stable and predictable current to a connected device or circuit. This is achieved through feedback mechanisms within the power supply. If the resistance of the load changes, the power supply will automatically increase or decrease its output voltage to keep the current flowing through the load constant. For instance, if the load resistance increases, the voltage will rise. Conversely, if the load resistance decreases, the voltage will fall.

Common applications for constant current power supplies include driving LEDs, which require a specific current to operate efficiently and to prevent damage from overcurrent. They are also used in battery charging systems, particularly for lithium-ion batteries, where precise current control is essential for safe and effective charging. Other uses can be found in electroplating, scientific experiments requiring controlled current, and in certain types of medical equipment. The design of a likestrømforsyning typically involves active electronic components that monitor and regulate the output current.