Constant voltage power supply is a power supply device that can keep the output voltage constant. Here are some key information about constant voltage power supplies:

Constant voltage power supply is a power supply device that can keep the output voltage constant. Here are some key information about constant voltage power supplies:

Definition and Working Principle:

Constant voltage power supply strives to keep the output voltage stable when the load changes. The ideal constant voltage power supply does not change its output voltage due to changes in load (output current), input voltage or ambient temperature, and its internal resistance is zero.

In fact, all constant voltage power supplies have a certain internal resistance. The output current of a constant voltage power supply will change with the change of load resistance, while the voltage remains constant.

Application areas:

Constant voltage power supply is widely used in laboratory, industrial production, communication equipment, medical equipment and household appliances and other fields to provide stable power supply for various equipment and ensure the normal operation and life of the equipment.

In the field of LED lighting, constant voltage power supply can be used in mains LED street lamps, and the power supply is supplied by AC/DC switching power supply to ensure that the output voltage is constant.

Characteristics:The terminal voltage of the constant voltage power supply does not change with the load current under the allowable load condition of the power supply, and its external characteristic is a straight line parallel to the abscissa.

The magnitude of the constant voltage power supply current is determined by the load resistance of the external circuit, that is, I=RLUS。。 The constant voltage source is not allowed to short circuit, otherwise the output current may tend to be infinite, thus damaging the power supply。Differences from traditional power supplies:

Compared with traditional power supplies, constant voltage power supplies can provide more stable voltage output, especially when the load changes greatly.

Constant voltage power supply is more suitable for occasions where stable voltage output is required, such as most electronic equipment, laboratory equipment and communication systems.Control Method:

The control of constant voltage power supply can achieve constant current regulation by changing the output voltage, or by adjusting the output current to maintain a constant output voltage, that is, constant voltage regulation.

The above information combines multiple sources to provide a comprehensive overview of constant voltage power supplies, including their definitions, working principles, application areas, characteristics, and differences from traditional power supplies.