为延长太阳能路灯的使用寿命,利用无线通信在线检测的形式对其电池的管理至关重要。文章研究了一种基于Nano LOC AVR模块的太阳能路灯无线通信管理系统。该系统能够实时检测到太阳能路灯电池的电压、电流、温度、内阻以及剩余容量等信...为延长太阳能路灯的使用寿命,利用无线通信在线检测的形式对其电池的管理至关重要。文章研究了一种基于Nano LOC AVR模块的太阳能路灯无线通信管理系统。该系统能够实时检测到太阳能路灯电池的电压、电流、温度、内阻以及剩余容量等信息。采集到的数据经无线通信的方式传输至上位机管理系统后,进行记录、存储、分析以及各种参数的处理。展开更多
In order to output sine wave with small degree of distortion and improve stability,a type of inverter power supply is designed based on harmonic elimination pulse-width modulation(PWM)control.The rectifier and filter ...In order to output sine wave with small degree of distortion and improve stability,a type of inverter power supply is designed based on harmonic elimination pulse-width modulation(PWM)control.The rectifier and filter are added to input circuit of the inverter.Single-phrase full-bridge inverter performs the function of converting direct current into alternating current(DC/AC).In the control circuit,single chip micyoco(SCM)AT89C2051 is used for main control chip to accomplish the hardware design of the control system.A given value of output frequency of the inverter is input in the way of coding.According to the output frequency code which is read,SCM AT89C2051 defined harmonic elimination PWM control data which will be selected.Through internal timing control,the switches are switched under this provision of PWM control data.Then the driving signals of the switches in the inverter are output from I/O of SCM AT89C2051 to realize harmonic elimination PWM control.The results show that adding Newton homotopic algorithm of harmonic elimination PWM control to corresponding software of the control system can make the quality of output voltage of the inverter higher and it will have broad application prospects.展开更多
文摘为延长太阳能路灯的使用寿命,利用无线通信在线检测的形式对其电池的管理至关重要。文章研究了一种基于Nano LOC AVR模块的太阳能路灯无线通信管理系统。该系统能够实时检测到太阳能路灯电池的电压、电流、温度、内阻以及剩余容量等信息。采集到的数据经无线通信的方式传输至上位机管理系统后,进行记录、存储、分析以及各种参数的处理。
文摘In order to output sine wave with small degree of distortion and improve stability,a type of inverter power supply is designed based on harmonic elimination pulse-width modulation(PWM)control.The rectifier and filter are added to input circuit of the inverter.Single-phrase full-bridge inverter performs the function of converting direct current into alternating current(DC/AC).In the control circuit,single chip micyoco(SCM)AT89C2051 is used for main control chip to accomplish the hardware design of the control system.A given value of output frequency of the inverter is input in the way of coding.According to the output frequency code which is read,SCM AT89C2051 defined harmonic elimination PWM control data which will be selected.Through internal timing control,the switches are switched under this provision of PWM control data.Then the driving signals of the switches in the inverter are output from I/O of SCM AT89C2051 to realize harmonic elimination PWM control.The results show that adding Newton homotopic algorithm of harmonic elimination PWM control to corresponding software of the control system can make the quality of output voltage of the inverter higher and it will have broad application prospects.
