How to distinguish constant voltage power source and constant current power source?

2019-10-17 22:50:50

 What does constant voltage constant current power supply mean? Constant voltage constant current switching power supply is constant voltage or constant current?
What does constant voltage constant current power supply mean? What are the main USES of constant voltage and current power sources? With the development of social science and technology and the popularization of electrical equipment, the constant voltage and constant current power supply has been applied more and more widely in various fields, and has gradually become an indispensable power supply. But is it constant voltage or constant current?

Constant-voltage constant-current power supply is actually a kind of switching power supply, but it has two control units, constant-voltage constant-current and two working states. When it is in constant voltage state, it works according to the characteristics of constant voltage power supply. When in constant current state, according to the characteristics of constant current power supply.

 

To sum up, it can be seen that the constant-voltage constant-current power source is both a constant-voltage power source and a constant-current power source. When the load resistance constant voltage constant current power supply is at a certain value, the constant voltage constant current power supply is the critical point (that is, when the voltage and current maximum), and the load resistance increases, the force in the constant voltage control unit starts to work, the output voltage is the same, the current change and the load resistance change. When the load resistance decreases and is less than the critical value, the constant-current control unit in the power supply starts to work. At this point, the output current can remain unchanged and the voltage varies with the load resistance.

Constant voltage constant current power supply characteristics

Constant voltage constant current circuit will not overload, short circuit and other phenomena, low power consumption, high efficiency, small size, light weight, easy to control, more widely used.

Constant current: the output current is a constant value, plus approximately ±5% deviation; If the voltage is written, it is usually in a range such as (30~45V).
Constant voltage: the output voltage is a constant value, the current may be the maximum
Constant voltage is often referred to as the stable voltage power supply, to ensure that the load (output current) changes, keep the voltage unchanged.
Constant current is in the case of load change, can adjust their output voltage, so that the output current remains unchanged

The internal components are constant voltage and current power supply

Constant-voltage constant-current power supply can be widely used in power, industrial control, communication, scientific research, battery charging, surface treatment, electrochemical, new energy, capacitors, motors, sewage treatment, electronic product production and testing, LED lighting, medical equipment, semiconductor equipment and other industries.