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2009•Journal of Changchun Institute of TechnologyRequires access

The PWM speed regulating system of DC motor based on MC51

Lin Jin

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Abstract

A PWM speed regulating system of DC motor based on MC51 microcontroller is introduced.The system uses MC51's timer to generate pluse and uses TLP250 optical coupler to realize the strong and weak optoelectronic isolation between the control units and driving units.The implement of the speed regulation by the H-bridge circuits which are constructed by specific IR2110 and FGA25N120 driving chips.The voltage acquisition collection of PC817 linear opticcoupler and AD0832 is desgined to do the closed-loop control in the system.The system contains multi-purpose including the speed adjusting for DC motor,the protection,the testing for speed and the value to display.The experiment shows it has better functions.

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What this paper is about

A PWM speed regulating system of DC motor based on MC51 microcontroller is introduced.The system uses MC51's timer to generate pluse and uses TLP250 optical coupler to realize the strong and weak optoelectronic isolation between the control units and driving units.The implement of the speed regulation by the H-bridge circuits which are constructed by specific IR2110 and FGA25N120 driving chips.The voltage acquisition collection of PC817 linear opticcoupler and AD0832 is desgined to do the closed-loop control in the system.The system contains multi-purpose including the speed adjusting for DC motor,the protection,the testing for speed and the value to display.The experiment shows it has better functions.

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Available abstract

A PWM speed regulating system of DC motor based on MC51 microcontroller is introduced.The system uses MC51's timer to generate pluse and uses TLP250 optical coupler to realize the strong and weak optoelectronic isolation between the control units and driving units.The implement of the speed regulation by the H-bridge circuits which are constructed by specific IR2110 and FGA25N120 driving chips.The voltage acquisition collection of PC817 linear opticcoupler and AD0832 is desgined to do the closed-loop control in the system.The system contains multi-purpose including the speed adjusting for DC motor,the protection,the testing for speed and the value to display.The experiment shows it has better functions.

Key concepts: Timer, Pulse-width modulation, DC motor, Microcontroller, Electronic speed control, Voltage, Computer science, Control system

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