Voltage conversion unit for fans

Abstract

A voltage conversion unit for a fan includes an input section, a circuit board, and an output section. The input section and the output section are electrically connected to an input terminal and an output terminal of the circuit board, respectively. The circuit board is provided with a boost converter module and a unidirectional conducting element. The input section receives a raw DC voltage. The boost converter module generates an induced electromotive force by driving its internal electronic switch to switch between closed and open states. The induced electromotive force is then superimposed on the raw DC voltage and output as a boosted output voltage to the output section via the unidirectional conducting element, making it suitable for use with fans with different drive voltages.

Claims

1. A voltage conversion unit for a fan, comprising: an input section for receiving a raw DC voltage; a circuit board having an input terminal and an output terminal, the input terminal being electrically connected to the input section, the circuit board having a boost converter module and a unidirectional conducting element disposed thereon; and an output section electrically connected to the output terminal of the circuit board; wherein, The boost converter module has an internal electronic switch. The boost converter module drives the internal electronic switch to switch between a closed state and an open state at high frequency to generate an induced electromotive force. The induced electromotive force is then superimposed on the original DC voltage and output to the output section via the unidirectional conducting element, resulting in a boost output voltage higher than the original DC voltage.

2. The voltage conversion unit for a fan as described in claim 1, wherein, The boost converter module includes an energy storage inductor and a control chip.

3. The voltage conversion unit for a fan as described in claim 2, wherein, The inductance value of the energy storage inductor is between 10μH and 50μH, and the energy storage inductor has a magnetic shielding structure to suppress electromagnetic interference generated during high-frequency switching.

4. The voltage conversion unit for a fan as described in claim 2, wherein, The circuit board further includes a voltage feedback circuit, which samples the voltage of the output section and sends a voltage feedback signal back to the control chip, so that the control chip adjusts the switching frequency of the internal electronic switch according to the voltage feedback signal to maintain a constant output voltage.

5. The voltage conversion unit for a fan as described in claim 4, wherein, The circuit board is further provided with a display module and a button module. The display module is electrically connected to the control chip to display the voltage value of the output unit in real time. The button module is electrically connected to the control chip to allow the user to switch the display mode of the display module or adjust the target value of the output voltage.

6. The voltage conversion unit for a fan as described in claim 1, wherein, The circuit board is also provided with a first filter capacitor and a second filter capacitor. The first filter capacitor is used to filter electronic noise of the original DC voltage received by the input section and input to the circuit board. The second filter capacitor is used to stabilize and smoothly release the boosted output voltage after being boosted by the boost converter module.

7. The voltage conversion unit for a fan as described in claim 1, wherein, The input section receives a raw DC voltage ranging from 5V to 12V, and the output section outputs a boosted output voltage ranging from 9V to 36V, with the boosted output voltage being greater than the raw DC voltage.

Images