Stephen Wolf Kirk Iler Brian Bentz Fuhe Xu. Current Schematics Micro, Motor, Keypad 2/2/2011Team 6: Defender2.

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Presentation transcript:

Stephen Wolf Kirk Iler Brian Bentz Fuhe Xu

Current Schematics Micro, Motor, Keypad 2/2/2011Team 6: Defender2

Current Schematics 3.3V Supply 2/2/2011Team 6: Defender3

High Voltage Charging 2/2/2011Team 6: Defender4

Discharging 2/2/2011Team 6: Defender5

Current PCB 2/2/2011Team 6: Defender6

Overall Considerations  Two boards (one for HV, one for LV)  Optical Isolation  Some high power traces on comm board (motors)  High voltage trace spacing on power board  Connector issues to motors, coil  Low inductance to coilgun  Thermal management and thermal pad soldering  Availability of headers and extra traces for ICD  Backup solder points for hard to solder parts 2/2/2011Team 6: Defender7

Microcontroller Considerations  Very few, microcontroller connections are very simple.  Standard bypass capacitors from data sheet.  Follow design guidelines for USB bus and I2C bus. 2/2/2011Team 6: Defender8

Low Voltage Power Supply  3.3V regulator thermal management  Switching 12V power rail  Connector to high power board  Separate 12V grounds 2/2/2011Team 6: Defender9

High Voltage Power Supply  Separate AC transformer with connector.  Low amperage but high rms voltage  Low inductance  Protection mechanisms for capacitor bank  Very wide traces 2/2/2011Team 6: Defender10

Discharge Circuit  IGBT offboard, screw mount  Low inductance, ESR is critical  Pulse rating for power only  Avoiding reflection and EMI 2/2/2011Team 6: Defender11