The introduction of OSC and PWM oscillator of DC charging...
The introduction of tap-changer of DC charging pile transformer
The tap changer in the transformer of a DC charging pile is an essential component used to adjust the output voltage of the transformer. It allows the output voltage to be regulated within a certain range by changing the turns ratio of the transformer. Here are some key features and working principles of the tap changer:
Main component
Regulating Output Voltage
The primary function of the tap changer is to regulate the output voltage of the transformer. By altering the connections of the transformer's high-voltage winding taps, the turns ratio of the transformer can be adjusted, thereby regulating the output voltage.
Types of Tap Changers
Tap changers are categorized into Off-Load Tap Changers and On-Load Tap Changers. Off-Load Tap Changers adjust the tap position when the transformer is disconnected from the power grid, while On-Load Tap Changers can adjust the tap position while the transformer is in operation, to meet varying voltage requirements.
Operation of Tap Changers
The tap changer changes the output voltage by switching between different winding taps of the transformer. This process involves several steps, including opening and closing selector switches and transfer switches, as well as transferring current between different taps.
Working Principle
The working principle of the tap changer is based on the making and breaking of contacts. During operation, the contacts connect with connectors at different positions on the windings. When the contacts engage with a connector, the current of the transformer flows through it, thus determining the output voltage or current.
Resistor and Reactor Tap Changers
Tap changers can be designed as either resistor tap changers or reactor tap changers. Resistor tap changers limit circulating current during switching by using resistors, while reactor tap changers use reactors. These designs help to reduce arcing and heat generation during the switching process.
In summary, the tap changer in the transformer of a DC charging pile adjusts the output voltage by changing the connection of the transformer windings, adapting to changes in the power grid and load, ensuring the stable operation of the power system.
DC CHARGING PIlE SERIES
DC charging pile is an efficient charging facility for electric vehicles, which uses direct current (DC) to directly charge the vehicle battery, significantly reducing the charging time. Compared with traditional AC charging piles, DC charging piles are able to provide higher power output and can usually charge an EV to 80% of its capacity in 30 minutes, providing users with a convenient charging experience.
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