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AC DC Converters

AC/DC converters are devices which convert an alternating current (AC) into a direct current (DC). They are used in many applications, from powering small consumer electronics like cell phones, laptops, and LED lights to industrial applications like electric vehicles and electric power plants. AC DC converters have been around since the early 20th century when humans first developed efficient methods for transforming AC to DC.

The primary purpose of AC DC converters is to convert alternating current into a fixed, continuous direct current. This is done by passing an incoming AC signal through a phase-shifting or rectification circuit that produces a fixed frequency, direct current output. The most common types of AC DC converters are linear regulated, switching regulated, and multiple output converters. Each type serves a distinct purpose and offers different advantages.

PS-25-48 Application Field and Working Principle

PS-25-48 is a widely used AC DC converter, which can be used in various kinds of applications. It is especially suitable for electric vehicles due to its high efficiency, strong stability, and safety standards. The PS-25-48 input voltage range is wide, from 6Vdc to 90Vdc, making it suitable for a variety of applications. The output voltage of this AC DC converter is fixed at 48Vdc with a maximum rated output power of 250W.

The working principle of the PS-25-48 AC DC converter is based on a buck-boost converter. The input AC voltage is first rectified by a diode bridge rectifier circuit and smoothed by an LC filter. After rectification, the input AC voltage is converted into a fixed, continuous direct current of 48Vdc by a buck-boost switching converter circuit. To precisely control the output voltage, a feedback loop is used which contains an error amplifier, voltage reference, a PWM comparator, and an output power MOSFET. The PWM comparator compares the output voltage level and the voltage from the reference and then sends a PWM signal to the output power MOSFET. Thus it controls the voltage level of the output, producing a stable, continuous output with high efficiency.

Conclusion

The PS-25-48 AC DC converter is a popular and widely used converter, especially in applications pertaining to electric vehicles. Its wide input voltage range makes it suitable for a variety of applications, and its high efficiency and stability make it an ideal choice for powering electric vehicles. The working principle of the PS-25-48 AC DC converter is based on a buck-boost converter circuit, which converts the input AC voltage into a fixed, continuous direct current of 48Vdc by using an error amplifier, voltage reference, PWM comparator, and output power MOSFET.

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