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Model Aviation

PDF: AN847 RC Model Aircraft Motor Control

Download 35 times Source: www.e-sonic.com // Topic: Model Aviation File Size: 248.15 kb // Total of Page: 18 Page(s) Last download by dimkins Last download on: 3 days ago Share this info: Sample of page (click to enlarge) Short Desciption: 32, 8, 2. RC Model Aircraft Motor Control ..... The second plane was a foam flying wing pow- ... plane is more sensitive to voltage so it is critical ... Content Inside: AN847 RC Model Aircraft Motor Control 5. Author: Joseph Julicher Microchip Technology Inc. 6. 7. INTRODUCTION As modern MOSFET transistors are developed with lower ON resistance and smaller packages, Electronic Speed Controls (ESC) follow. By using a microcontroller and a few small MOSFETs, high performance speed controls can be built with advanced features in small packages. This application note will describe the design and construction of two small speed controls appropriate for flying model airplanes up to 6 lbs. Many of the control techniques in this application note can easily be used with larger DC motors in different applications. 8. Safety Shutoff (if the controlling signal is lost, the motor should stop) Battery Eliminator Circuit (BEC) (This allows the flight battery to power the radio equipment) Low Voltage Shutdown (Disables the motor when the battery voltage drops to a low value which allows the radio to continue to function) PWM (Pulse Width Modulation) frequency as high as possible. Be careful