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Daniel Bressan David Tran Robbie Banks Amit Kapoor MACH 1/7.

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Presentation on theme: "Daniel Bressan David Tran Robbie Banks Amit Kapoor MACH 1/7."— Presentation transcript:

1 Daniel Bressan David Tran Robbie Banks Amit Kapoor MACH 1/7

2  Produce an awesome workable RC car from scratch  Top speeds of over 100 mph  Program GUI interface to control the car from laptop  Design mechanical chassis and shell for car David Tran

3  Low: Function Car  Using ECS pre- programmed chip  Driving, with GUI and 900MHz RF  Low end (cutting board) Chassis  Mid: MPH  Gate drivers working  High: 100+ MPH  Build own Chassis and Shell David Tran

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5  We will build a GUI interface to control the car.  Mouse  Keyboard  Input:  Power from wall  RS-232 Signal for speed  Output:  RS-232 Signal to CPU to control speed and steering  Will start coding as soon as PCB is ordered Amit Kapoor

6  Not much changed since PDR  Xtend PKG MHz  Tested and working Amit Kapoor

7 David Tran

8  MSP430-F2616  Inputs Tx/Rx and digital optical encoder information  Outputs PWM for servo and PWMs for gate driver  MAX232  Interprets RS-232 signal David Tran

9  User timers and DAC to generate sinusoid  Pulse widths from sin table  Servo Control David Tran

10 Daniel Bressan

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12  LiPo 3 cell 11.1 V  Powers motors and everything isolated on that side  LiPo 4 cell 14.8 V  Regulated for:  3.3 V TLV  5 V TLV  9 V LM Daniel Bressan

13  14.8 V, 1Ah LiPo regulated for:  3.3 V MSP430  5 V  Optical Encoder  Max 232  9 V RF  11.1V, 5Ah LiPo Motor side  5 V  Optoisolater VO0630T (right)  DC motor for Gyroscope  Servo  Transistors Daniel Bressan

14  Speed Encoders  US Digtial E5  32 CPR (cycles per revolution)  Max RPM 60,000  Sensors  NONE!  Threw out inclinometer and force sensor ideas  Steering  Pre-Built Servo  PWM  Gyroscope Daniel Bressan

15  Takes three PWM inputs  Max RPM of 60 kHz  Four pole motor  Max input frequency 2kHz  RPMs can be calculated as follows RPM = 120 * f/p p = poles  With our wheels and rotational speed we could achieve a velocity of 700 MPH Robbie Banks

16  Constant torque up to the rated frequency  Can go past rated frequency but lose torque Robbie Banks

17  Dual Channel Opto-Isolators  Gate Driver  Triple Half-Bridge Driver Robbie Banks

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19  Using Opto-Isolator for separation  Powered by a regulator connected to the motor power supply  Takes PWM inputs from microcontroller  Digital Opto-Isolator high- low threshold of.8V  Rise time of 23ns and Fall time of 7ns  Max frequency of 33.3MHz Robbie Banks

20  Three PWM inputs  Amplifies PWM inputs  Dead time setting to prevent shoot through  Disable input signal  Six output signals, three high and three low  Powered directly by the three cell 11.1V LiPo battery Robbie Banks

21  Uses six AUIRL1404ZS MOSFETS  High Power NMOS transistors  Continuous drain current of 160A  VGS of 10V  Each source on the MOSFET is connected to the gate driver to ensure a VGS of at least 10V  Powered directly from the three cell 11.1V LiPo battery Robbie Banks

22  For testing and low level design:  Kitchen cutting board chassis  High level design (after machine shop training):  Chassis and Shell possibly out of acrylic.  ITLL has an acrylic cutter  Will start full designs after PCB is ordered this week Robbie Banks

23 TaskAmitDanielDavidRobbie Electrical Control Systems xx Power Systems xxx Populate PCB xxxx Mechanical Chassis xx Mounts xxxx Controls xx Software GUI xxxx Micro Controller xx Systems Integration xxxx Testing xxxx Documentation xxxx  Main Changes:  David: mostly software, getting PWMs to work properly  Amit: Learning and teaching us Altium, and software with David  Robbie: Gate Driver and Power  Daniel: Power, and other simple components, helping Robbie Amit Kapoor

24  Changes to Schedule:  Behind on ordering PCB (should finish this week)  Behind on programming GUI, will start as soon as PCB is ordered  Ahead of schedule for gate driver Amit Kapoor

25 ItemPriceQuantityTotal Price for PartComments Component Batt $ $ V 1Ah AA Batt $ $ 8.00EE store Batteries $ $ V 5Ah Optoisolators $ -10 $ -Sampled Vishay Gate Driver $ -2 Sampled Intersil Voltage Reulators $ -30 $ -Sampled TI/National Semiconductor MSP430 $ -4 Sampled 64 and 80 pin Power MOSFET $ $ 48.00IR Optical Encoder $ US Digital E5 Charger $ Passport LiPo charger 3-phase Motor $ Mamba Monster Various RC Car Parts $ Servo, Wheels, Axels Total $ Tax and shipping Amit Kapoor

26  Milestone I  PCB testing (hopefully we’ll have it back)  Working Gate Driver  MSP430 communicating with gate driver  Milestone II  Driving Car  EXPO!  Car going 100+ MPH Amit Kapoor

27 Daniel Bressan


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