Download - Brushless DC Motor Controller
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Brushless DC Motor Controller
JR Alvarez, Matt MyersChris Sommer, Scott O’Connor
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Table of Contents
• Introduction/Background• Objectives• Microcontroller• Gate Drivers• MOSFET• Heat Sink• Interface• Budget• Future Additions
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Introduction
• Design, Build, Test, and Race a Solar Car• American Solar Challenge• 1600 Mile Race
• 30 College Teams from several different Countries
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Background
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Objectives
Spin Motor Reliability Modularity 90% Efficiency
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Block Diagram
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Microcontroller and DSP The Freescale S12ZVM included gate drivers on
chip. The MPC5748G provided powerful options and
control but offered little in the way of support. The TI c2000 is not as powerful but comes with
software and support.
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Gate DriversFunction- Supply current and voltage to turn on MOSFET’s
• Vgs 10 to 15 voltage• Low Source Resistance• Floating Output• Opto-Isolation • Low Internal Power Usage• Protection Logic and Circuitry
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MOSFETs Stmicroelectronics High Drain to Source Break-down Voltage
VDSS = 650V High Drain Current
IDSS @ 25°C = 84A IDSS @ 100°C = 50.5A
Low on Resistance Rds(on) = 0.024Ω (VGS = 10V, ID = 42A)
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Heat Sink
Extruded Aluminum0.3°C/W thermal resistance
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Interface
• Dual Potentiometer Input– Brake– Throttle
• Logic level converter– Hall effect sensors
User MotorController Motor
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Budget
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Future Additions
• Power Monitoring• CAN Network• Sensorless Control Capabilities
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Thank You