The working principle of the DC-DC used in steel mill waterwheels-DCDC, bidirectional DCDC,Energy router, high-power DCDC, DCDC converter, High power bidirectional DCDC

Basic Concepts
- In steel mill waterwheels, DCDC (DC - DC converter) is mainly used for voltage conversion. The power supply system of a steel mill waterwheel may involve different DC voltage levels. The function of the DCDC is to convert one DC voltage to another to meet the power requirements of various devices on the waterwheel.
Core of the Working Principle - Switching Power Supply Technology
- Most of the DCDC converters in steel mill waterwheels adopt switching power supply technology. Its basic principle is to achieve voltage conversion by controlling the on - and - off states of switching tubes (usually power semiconductor devices such as MOSFETs).
- When the switching tube is turned on, the input voltage is applied to the inductor, and the inductor starts to store energy. At this time, the current rises linearly. Meanwhile, the capacitor provides energy to the load to maintain the stability of the output voltage.
- When the switching tube is turned off, the magnetic field in the inductor changes, generating an induced electromotive force. This induced electromotive force, superimposed with the input voltage, supplies power to the load and the capacitor through a diode (free - wheeling diode). The energy in the inductor is gradually released, and the current decreases linearly. By continuously repeating this on - and - off process, a stable DC voltage can be obtained at the output.
Voltage Regulation Principle
- The DCDC converter adjusts the output voltage by changing the on - time (duty cycle) of the switching tube. The duty cycle refers to the ratio of the on - time of the switching tube to the switching cycle.
- If it is necessary to increase the output voltage, the duty cycle will be increased, enabling the inductor to store more energy, and thus a higher voltage can be obtained at the output. Conversely, if it is necessary to reduce the output voltage, the duty cycle will be decreased.
- In the actual application of steel mill waterwheels, the control system on the waterwheel will monitor the output voltage through a feedback circuit according to the voltage requirements of the devices, and feed the signal back to the controller. The controller adjusts the duty cycle of the switching tube based on the feedback signal, thereby precisely controlling the output voltage.
Function of the Filter Circuit
- In order to obtain a pure DC output voltage, the DCDC converter is also equipped with a filter circuit. The filter circuit is mainly composed of capacitors and inductors.
- The input filter circuit can filter out high - frequency clutter and interference signals in the input power supply, ensuring that the voltage input to the switching power supply part is relatively stable and pure.
- The output filter circuit is used to smooth the output voltage. During the on - and - off process of the switching tube, there will be a certain amount of ripple in the output voltage. The output filter capacitor can store charge and release it when the voltage drops to reduce the ripple. The inductor can prevent sudden changes in current, further reducing the ripple coefficient, making the output voltage closer to the ideal DC voltage and meeting the power quality requirements of steel mill waterwheel devices.

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The working principle of the DC-DC used in steel mill waterwheels

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