The invention discloses an isolated fan PWM (Pulse Width Modulation) control circuit based on a small direct current charging pile, which belongs to the field of new energy and comprises a DSP (Digital Signal Processor) chip U1, a high-speed optocoupler U2 and a fan F1, the output end of the DSP chip U1 is connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with the input cathode of the high-speed optical coupler U2, and the input anode of the high-speed optical coupler U2 is connected with a power supply PVCC; an output collector electrode of the high-speed optocoupler U2 is connected with one end of a resistor R1 and one end of a resistor R2 at the same time, and the other end of the resistor R2 is connected with a base electrode of a triode Q2; the collector electrode of the triode Q2 is connected with one end of the resistor R3, and the PWM speed regulation pin of the fan F1 is connected with the collector electrode of the triode Q2; and a PWM speed regulation pin of the fan F1 is in communication connection with the DSP chip U1. The fan is simple in structure, low in cost, high in performance and high in cost performance, loss caused by the fan is greatly reduced, and noise to the surrounding environment is reduced.
本发明公开一种基于小型直流充电桩的隔离型风扇PWM控制电路,属于新能源领域,包括DSP芯片U1、高速光耦U2和风扇F1;所述的DSP芯片U1的输出端与三极管Q1基极连接,三极管Q1的集电极与高速光耦U2的输入阴极连接,高速光耦U2的输入阳极与电源PVCC连接;高速光耦U2的输出集电极同时与电阻R1的一端、电阻R2的一端连接,电阻R2的另一端与三极管Q2的基极连接;三极管Q2的集电极与电阻R3的一端连接,风扇F1的PWM调速脚与三极管Q2的集电极连接;风扇F1的PWM调速脚与DSP芯片U1通信连接。本发明结构简单,成本低廉,性能高,性价比高,大幅度的降低风扇带来的损耗,减小了对周围环境的噪声。
Isolation type fan PWM control circuit based on small direct current charging pile
一种基于小型直流充电桩的隔离型风扇PWM控制电路
2025-05-13
Patent
Electronic Resource
Chinese
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