基于开关电源的智能电瓶车充电系统研究

为解决现今市面上使用的电瓶车充电系统的充电电压与电瓶车型号不匹配而对电瓶车电容产生损害的问题,提出一种新型电瓶车充电系统。该充电系统使用NCP1654作为核心控制芯片,采用开关直流升压电路(Boost:Boost Converter or Step-up Converter)拓扑作为主电路,利用新型碳化硅半导体器件作为主开关器件,完成了电瓶车充电系统中交流转直流部分的设计制作。供电侧的交流电压从180~260 V变化时,设备均可正常运行。此智能电瓶车充电系统输出两路直流电压42 V和27 V,最大输出电流均为2 A,负载调整率为0. 1,输出噪声纹波电压峰-峰值小于1. 5 V。充电设备中有可靠的保护电路,可以防止启动时尖峰电压和浪涌电流对电路的冲击。考虑到电瓶车充电系统的用户体验感,选择触摸屏作为操作界面。此外,利用STM32开发板检测输出电压电流,控制充电系统输出电压幅值。经测试,该电瓶车充电系统各项指标都达到了设计要求,可投入使用。

In order to solve the problem that the battery car capacitance is damaged because charging voltage of the battery charging systems used in the market is not matched with the model of the battery car capacitance,a new battery charger is proposed. The battery charging system uses NCP1654 as the core control chip,and the Boost Chopper is used as the main circuit. The new silicon carbide semiconductor device is used as the main switching device to convert alternating current into direct current. When the AC voltage on the power supply changes from 180 V to 260 V,the device can operate normally. The intelligent battery car charging system outputs two DC voltages,42 V and 27 V respectively,and the maximum output current are both 2 A. The load regulation is 0. 1,and the peak-to-peak value of output noise ripple voltage is less than 1. 5 V. The protection circuit in the charging device prevents spike voltage and surge current during start-up,and prevents over charge problem. Considering the user experience of the intelligent battery charging system,the touch screen is selected as the operation interface. The STM32 demoboard is used to detect the output voltage and output current,control the output voltage amplitude of the charging system. The STM32 can also detect the output voltage and current and control the amplitude of the output voltage. After testing,the battery charging system reached the design requirements.