文档介绍：摘要
本设计是把无刷直流电动机作为电动自行车控制系统的驱动电机,以PIC16F877单片机为主控制器,该控制器是一种以开关电源、PWM调制芯片、硬件逻辑门电路等,用以控制大功率电动自行车电动机。系统采用过电流、过电压等保护电路来提高运行可靠性。采用带位置传感器的无刷直流电动机,根据它的特性实施脉宽PWM 控制,通过软硬件的配合,实现了整个系统的设计要求。对电动机进行调速控制;显示电路可以显示现行速度、里程和时间等;驱动电路采用互补型功率MOSFET组成三相六路状态的逆变器电路,它使用独立电源供电的光电耦合器实现了MOSFET的通用驱动方法,简化了电路的结构,使工作可靠。根据位置传感器的安装位置严格推导出了位置传感器输出信号与逆变器驱动信号之间的逻辑关系,并以简单、可靠、经济的方法实现这一电路。
关键词:无刷直流电动机;电动自行车;位置传感器;PIC16F877单片机
Abstract
The design of the brushless DC motor for electric bicycle control system to drive the motor, using PIC16F877MCU as the main controller, the controller is a kind of switch power supply, PWM modulation chip, hardware logic gate circuit, used to control large power electric machine. The system uses over-current, over-voltage protection circuit to improve the reliability of operation. The position sensor brushless DC motor, it under the control of the PWM pulse width, through hardware and software support, for the entire system design requirements. The motor speed control; display circuit can display the current speed, mileage and time; driving circuit plementary type power MOSFET three-phase six state inverter circuit, which uses a separate power supply photoelectric coupler MOSFET realized the universal driving method, simplifies the structure of the circuit, so that the reliable work. According to the location of installation position of sensor are strictly deduced position sensor output signal and the inverter drive signals between the logic relation, and with simple, reliable, economical method to achieve this circuit.
Key words: brushless DC motor; electric bicycle; position sensor; SCM PIC16F877
目录
摘要 I
Abstract II
1 绪论 1
课题设计的背景及意义 1
1
课题设计的意义 1
电动自行车的发展过程 3
3
2 设计的内容与要求 5
本次设计的主要内容 5
本次设计的要求 5
电动自行车系统的主要技术指标 5
设计实现的主要功能 6
3 电动自行车控制器系统方案设计 7
7
方案的选择 8
方案一 8
方案二 9
电动自行车系统的原理框图 10
4 电动自行车控制器的硬件设计 12
系统硬件组成 12
单片机的选型 12
13