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测控技术与仪器专业资料 大功率 电动机 调速 控制 软件设计 测控 技术 仪器 专业 资料

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大功率电动机调速控制的软件设计【测控技术与仪器专业资料】,测控技术与仪器专业资料,大功率,电动机,调速,控制,软件设计,测控,技术,仪器,专业,资料

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大功率电机转速控制软件设计摘要半固态镁合金连续铸轧是一种全新的近终型金属成形技术，可用来提高镁合金的性能。但目前镁合金铸轧自动化程度相对低、速度控制特性差因此，通过对可控硅调速系统的改进，以实现铸轧速度的无级调速。在本系统中，主控微机选择的是 80C552，通过给定电位器给定一定电压，在微机内部进行 A/D 转换后作为电机速度的给定值，使用光电码盘配合改进型 M/T 法对电机进行测速，将检测到的电机转速实际值与给定值进行比较，分析电机转速偏差的大小与变化的情况，在在内部进行 PID 运算，通过改变 PWM0 脉冲宽度寄存器的值，改变单片机输出的 PWM 脉冲的占空比，输出的 PWM 脉冲经隔离、驱动、放大后对电机的速度进行有效调节，使得电机的实际转速与给定转速相等。通过此次调速系统的改进，实现了镁合金半固态加工技术的自动化水平；实现螺旋杆运转速度大范围连续自动可调，可把现在用于铸轧辊的可控硅调速系统改成PWM 驱动控制系统,并把电压控制改为电流控制,适当提高PWM 放大器的输出驱动能力和系统的抗干扰能力；实现铸轧速度的无极调速，而且运转平稳，低速特性好，其调速控制设计成由微机来实现的软、硬件 PWM 驱动控制系统，并在PWM 系统之前加上一个 PID 调节器，以克服外部各种干扰因素的影响，提高系统的综合性能指标；用 PWM 和光电码盘实现了镁合金铸轧速度的无级调速，而且运转平稳，稳态误差0.3 。关键词 80C552 直流电机 PWM 调速 PID 控制The software design of the high power motor speed controlAbstract Semi-solid magnesium alloy continuous casting is a new near-net-shapemetal forming technology can be used to improve the properties of magnesium alloys. But the current level of magnesium alloy casting automation relatively low speed control characteristic difference Therefore, the governor of the SCR system improvements in order to achieve casting speed of variable speed.In this system, the master computer chose the 80C552, by a given potentiometer setting a certain voltage, the microcomputer inside the given value as the motor speed of the A / D conversion, using optical encoder with improved M / T method of motor speed, the motor speed to the actual value of a given value, the motor speed deviation analysis of the size and change in internal PID operation by changing the value of the PWM0 pulse width register, change MCU output PWM pulse duty cycle, the output PWM pulse by the isolation, drive, amplified to effectively regulate the speed of the motor so that the actual speed of the motor and given equal speed.By improving the speed control system to achieve the level of automation of magnesium alloy semi-solid processing technology; to achieve a wide range of operating speed auger automatically and continuously adjustable speed control system is now available for the SCR casting roll into a PWM The drive control system, and to change the current control voltage control, an appropriate increase in anti-jamming capability PWM amplifier output drive capability and systems; to achieve casting speed stepless and smooth operation, good low-speed characteristics, its speed control design a software and hardware PWM drive control system implemented by the computer, plus a PID controller before the PWM system to overcome the effects of various interference of external factors, to improve the overall performance of the system; with PWM and photoelectric encoder achie