They maintain a constant voltage by varying their resistance to counterbalance input voltage change.
Constant voltage constant frequency power supply.
The constant voltage source provides a constant voltage to the load regardless of variations or changes in the load resistance.
An example of a constant voltage power supply is below in the mean well lpv 60 12.
This initiated the development of the linear regulator series shunt circuits.
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Most often constant voltage drivers are implemented in under cabinet lights and other led flex strip applications but it is not limited to those categories.
The lpv 60 12 will maintain a constant 12vdc if the current stays below the 5 amp maximum shown in the table.
Mean well designed their pwm series dimmable ac dc class 2 power supply to be ideal for led strip lighting applications.
Simple dc power supplies can be made with rectifiers.
Should the constant voltage power supply exceed 5a the rated current then the power supply will go into an overload protection mode operating from 105 150 of the rated output power.
Still the efficiency of this system is poor.
But they suffer from changes in the input or at load.
Provides single phase and three phase 400 hz output frequency converters to aerospace industries to simulate the power on aircrafts.
Provides a wide variety of constant current sources constant voltage sources solutions for military organizations such as nasa navy and the boeing company.
Many of b amp k precision s dc power supplies are categorized as this type of power supply and depending on the application it is important and useful to know how to switch between the two modes.
This article primarily applies to dc power supplies that can switch between constant voltage cv and constant current cc mode automatically.
Products with these current regulating devices might require a constant voltage power supply if they need a different operating voltage than what s supplied by the power source home vehicle etc.