Minor changes were made to the rules (technical reference guide) for clarification and validation testing. Includes update to LED indicator.
- Section 14 – Indicator lights are not required when the E-Stop is ON (open).
June 12th – The following changes were made to the Technical reference guide.
- Section 9.a – Switched throttle connector gender to avoid accidental damage due to misconnection (poka-yoke)
- Section 14 – Clarified E-Stop Off (closed) vs On (open) description. Eliminated mode c
- Section 15 – Fuse model specified
- Section 17 – Temperature protection will not be evaluated
- Section 23.d – Free Acceleration test is now pass/fail and must achieve 2400rpm in 2 seconds
- Section 23.e – A 2 min rest period is permitted between each throttle command set (1.5V, 2V, 3V, 4V)
THIS DOCUMENT HAS BEEN WITHDRAWN.
The technical reference document has been updated, see the change log below.
We are working on the progress report grading. Results will be released soon. Thank you for your patience.
- Motor phase current increased to 30Arms
- All cables can be unshielded
- Throttle Command table updated (Voltage vs RMS Phase Current) and includes error limits. Added Wide Open Throttle (WOT) command for 4.5V.
- Motor external fuse increased to 50A
- Maximum continuous battery current of 12A and 15A peak current (definitions include filter settings)
- Added brake disable input
- Dynamometer speed controlled with Constant Voltage (CV) load
- Basic Operation Test added for the Brake State
- Drive Cycle Test updated
- Full Load Test Updated
- Field Test on actual bicycle is defined
This file documents a sample design of a motor drive for an application similar to the IFEC competition for teams to use as a resource. Competition administrators do not in anyway endorse this design, but this is merely provided as a reference.
This document provides the small signal impedance frequency response measurement results from one of the 12V batteries used in the battery pack at different state of charge levels. Four such batteries are connected in series to make the battery pack. Please use these test results accordingly.
This document provides the specs for one of the 12V batteries used in the battery pack. Four such batteries are connected in series to make the battery pack. Please use this specifications sheet accordingly.
Are the voltage requirements (0-36V line to neutral) specified as peak value or rms? And are we on the right path, that the given voltage is the sinusoidal fundamental oscillation of the trapezoidal back EMF of one motor coil?
The 0-36V specification is rms value of the fundamental component. These specifications are ‘nominal’. Depending on the team’s particular control strategy (speed, torque, current, power, MTPA, etc), the voltage fundamental component may be higher or lower. The actual test conditions that will be evaluated will include measurements of voltage and current simultaneously to evaluate the power delivered to the motor.