Team 13 Michael Stuckenschneider Loren Garby Arin Chakraverty Janell Niekamp

LT 1529 Linear Voltage Regulator λ p = (C 1 π T + C 2 π E )π Q π L ParameterDescriptionValueComments C1C1 Die Complexity.02Linear, MOS transistors πTπT Temperature Factor58Linear MOS, Max Temp of 125° C C2C2 Package Failure Rate pins, Nonhermetic DIP πEπE Environmental Factor4Ground Mobile πQπQ Quality Factor10Commercial πLπL Learning Factor1In Production for over 2 years λPλP Failures/10 6 hours MTTF 85, hours = years

PIC18F4331 λ p = (C 1 π T + C 2 π E )π Q π L ParameterDescriptionValueComments C1C1 Die Complexity.2816 bit, CMOS πTπT Temperature Factor3.1CMOS, Max Temp of 125° C C2C2 Package Failure Rate pins, Nonhermetic DIP πEπE Environmental Factor4Ground Mobile πQπQ Quality Factor10Commercial πLπL Learning Factor1In Production for over 2 years λPλP Failures/10 6 hours9.44 MTTF hours = years

CM300DY-24H IGBT λ B = λ D π T π A π M π Q π E ParameterDescriptionValueComments λBλB Base Failure Rate99Power output of 1440W πTπT Temperature Factor2.4V S =V CE /BV CES ; V CE =48V BV CES =1200V πAπA Application Factor2.2Duty Cycle > 30% πMπM Matching Network Factor4None πQπQ Quality Factor1JANTX πEπE Environmental Factor10Ground Mobile λPλP Failures/10 6 hours MTTF4.78 hours =.199 Days

 Military Handbook calls for maximum values

Power = WFrequency =.02GHZλ B = ∞

CM300DY-24H IGBT λ B = λ D π T π A π M π Q π E ParameterDescriptionValueComments λBλB Base Failure Rate99Power output of 1440W πTπT Temperature Factor2.4V S =V CE /BV CES ; V CE =48V BV CES =1200V πAπA Application Factor2.2Duty Cycle > 30% πMπM Matching Network Factor4None πQπQ Quality Factor1JANTX πEπE Environmental Factor10Ground Mobile λPλP Failures/10 6 hours MTTF4.78 hours =.199 Days

LM2733 Boost λ p = (C 1 π T + C 2 π E )π Q π L ParameterDescriptionValueComments C1C1 Die Complexity.02Linear MOS transistors πTπT Temperature Factor58Linear MOS, Max Temp of 125° C C2C2 Package Failure Rate pin Nonhermetic SMT πEπE Environmental Factor4Ground Mobile πQπQ Quality Factor10Commercial πLπL Learning Factor1In Production for over 2 years λPλP Failures/10 6 hours11.64 MTTF hours = years

 A. Microcontroller  B. Sensors  C. Power  D. Motor Control  E. User Interface

 HIGH  Failure that causes system instability  Possible damage to user and/or system  MEDIUM  Requires replacement of minor component  Causes undesirable behavior  LOW  LCD malfunction, incorrect battery level  No damage to device

Failure No. Failure Mode Possible Causes Failure EffectsMethod of Detection CriticalityRemark A1VCC shorted to ground Bypass Capacitor Shorts No Power to Microprocessor DMMMediumCauses entire system to shutdown A2Micro remains in reset Reset switch shorts closed Microprocessor fails to execute program DMMMediumUser input will be non-existent

Failure No. Failure Mode Possible Causes Failure EffectsMethod of Detection CriticalityRemark B1No power to inclinometer Bypass Capacitor Shorts No lean angle displayed on LCD DMMMedium B2No power to Battery Diff- Amps Bypass Capacitor shorts No battery level displayed on LCD DMMMediumUser will not know how much charge is left B3No Power to shunt Diff- Amp Bypass Capacitor shorts Micro reads current as zero and applies full power to motor DMMHigh Can cause serious damage to critical components and the rider

Failure No. Failure Mode Possible Causes Failure EffectsMethod of Detection CriticalityRemark C1System Performance seems erratic Bypass Capacitor fails Introduces noise into the system which causes output voltage to vary Observation while riding MediumCan cause unpredictable ride performance C2Battery level seems erratic Boost feedback resistor fails causing unreliable output voltage LCD displays false battery levels ObservationLowBoost reads unpredictable feedback voltage, tries to correct output voltage C3Battery level seems erratic Output capacitor fails Micro reads current as zero and applies full power to motor ObservationLow20V output switches over too large a range that diff-amps fail to function properly

Failure No. Failure Mode Possible Causes Failure EffectsMethod of Detection CriticalityRemark D1Cannot control motor Gate driver may have burned up Motor stops operatingObservationMediumWould cause motor to coast to a stop D2High side gate not switching Bootstrap capacitor/diode failure Motor stops operatingOscilloscopeMediumCauses motor windings to be shorted D3No power to gate driver Bypass capacitor shorts Motor stops operatingDMMMedium D4*High side IGBT switch stuck closed Excessive current draw Motor speeds up out of control DMMHighCan cause serious injury to rider * Indicates off board component

Failure No. Failure Mode Possible Causes Failure EffectsMethod of Detection CriticalityRemark E1Motor seams unresponsive Throttle ATD not functioning No motor response from user input ObservationHighCan occur while at speed with unpredictable results E2No output/ Junk to LCD Buffer overrun, dead TX pin Pertinent data cannot be sent to the user ObservationMediumCan cause user to over discharge batteries E3Break light I/O pin Dead I/O pinCauses break lights no to function ObservationHighCauses bike to not be street legal and increases risk of accident * Indicates off board component

Questions?