• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 39 subscribers
  • Views 660 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM62-EVSE-DEV-PLATFORM: Inquiry Regarding AM62-EVSE-DEV-PLATFORM for EV Charging Research

EUIJIN KIM
Prodigy 10 points
Part Number: AM62-EVSE-DEV-PLATFORM
Other Parts Discussed in Thread: TLV1805, TIDA-010239, TINA-TI

Tool/software:

Hello,
I am currently conducting research on electric vehicle (EV) charging, with a particular focus on AC charging communication (J1772, IEC 61851-1) between EVs and charging stations.

I am very interested in your "AM62-EVSE-DEV-PLATFORM" product, and I would also like to ask for your recommendation on the most suitable product for my research purposes.

My goal is to build a testbed that simulates the AC charging process between an EV and an EVSE, based on the IEC 61851-1 protocol. For this, I require both an EV-side and an EVSE-side board, and the system must be capable of handling the entire charging scenario, including PWM signal communication and charging state transitions.

I believe your products are well-suited for this purpose and am considering a purchase. However, before making a final decision, I would like to confirm a few details as outlined below:

Having reviewed your offerings, I believe your development platforms may be well-suited for this purpose. However, I would like to clarify a few points before proceeding with a purchase:

1. Suitability for Research Testbed
The primary objective of my testbed is to observe how PWM signal voltage and duty cycle affect maximum charging current and state transitions during AC charging (J1772, IEC 61851-1).
Could you kindly confirm whether the above-mentioned boards are capable of supporting such functionality?

In case these boards are not suitable for this specific use case, could you recommend alternative boards or development kits from your portfolio that would meet these requirements?

2. Real-Time Observation of PWM Signals
I plan to measure the PWM signal's voltage level and duty cycle in real time using an oscilloscope.
Could you confirm whether the PWM signal generated by your boards is accessible via external signal lines for such observation?

Thank you very much for taking the time to review my inquiry.
Your response will be highly valuable in helping our research team make an informed decision regarding our development platform.

  • 0
    TI__Prodigy 120 points

    Hello, thanks for reaching out and your interest in our AM62-EVSE-DEV-PLATFORM.

    To build an AC charging communication Testbed you will need two parts:

    1. The EV-charger (EVSE) side, which generates the Control Pilot (CP), a 1KHz, +/-12V PWM signal. Depending on the duty cycle of the PWM signal, the electric vehicle can read out the current capability of the EVSE.
    2. The EV side, which will load the Control Pilot signal with different resistor values, causing a voltage drop on the CP line. Based on the voltage level different states like ready to charge, digital communication required, or not ready to accept energy are communicated and can be read out by the EVSE.

    In the AM62-EVSE-DEV-Plattform the Control Pilot is generated on the TIDA-010239. You can find the circuit in the Schematics on page 6.

    Control Pilot Circuit

    For measuring, there are test points on the PCB where you can easily connect your oscilloscope probes to. TP24 is connected to the CP signal, TP25 the input signal of the amplifier / comparator and TP26 which is connected to the feedback signal of the CP.

    The Input signal for the TLV1805 is provided by the AM62-EVM in our demo. If you are only interested in the CP, you could also use an MSP-Launchpad or lab equipment to generate the PWM signal and read out the voltage at TP26.

    TIDA-010239 demonstrates only the EVSE side, not the EV side. That means for the complete J1772 / IEC 61851-1 Testbed you’ll need an extra EV simulation circuit. We do not have a finished reference design showing this functionality yet. If only the voltage drop needs to be generated, following circuit can be used:

    EV Simulation Circuit

    Setting GPIO_EV_PlugIN to logic high connects the "EV", loading the CP signal with the 2.74k resistor R1 to enter State B - EV connected. To enter State C, signaling charging, GPIO_EV_Charge must be set to logic high, connecting R2 1.3k to the CP signal. The Diode D1 forwards only the positive half of the Control Pilot PWM, as this is a requirement according to J1772 / IEC 61851-1.

    STATE

    PILOT HIGH VOLTAGE

    PILOT LOW VOLTAGE

    FREQUENCY

    RESISTANCE

    DESCRIPTION

    State A

    12 V

    N/A

    DC

    N/A

    EV not connected

    State B1

    9 V

    N/A

    DC

    2.74 kΩ

    EV connected, EVSE not ready to supply energy

    State B2

    9 V

    -12V

    1 kHz

    2.74 kΩ

    EV connected, EVSE ready to supply energy

    State C

    6 V

    -12 V

    1 kHz

    882 Ω

    EV charging

    State D

    3 V

    -12 V

    1 kHz

    246 Ω

    EV charging, ventilation required

    State E

    0 V

    0 V

    N/A

    -

    Error

    State F

    N/A

    -12 V

    N/A

    -

    Unknown error

    The transistors Q1/Q2 and Q3 can be replaced with a switch or jumper, if they don’t have to be controlled by an MCU. If state D needs to be simulated as well, an additional 270Ω resistor and switch must be added to the circuit.

    You can find a TINA-TI simulation of the circuit here: https://tidrive.ext.ti.com/u/yg1MZXkNTE7YDUxF/f1485c16-a2e1-405c-922b-be3b9016c83c?l 

    PW: Pr6{wZg4

    The simulation program TINA-TI can be downloaded here: https://www.ti.com/tool/TINA-TI

    Let me know if any further support is required.

    Best Regards,

    Simon

  • 0 in reply to Simon Bozowicki
    Prodigy 45 points

    Hi Simon,

    I’ve reviewed the Bill of Materials for TIDA-010239 that you provided, and I noticed that several components are missing part numbers. Could you please send me the updated BOM with the correct part numbers for these items? For example, parts R135, R139, R141, R145, and R148.

    Additionally, could you provide a link to the schematics in Altium format?

    Thank you for your help!

    Best regards,
    Sean

  • 0 in reply to Sean Dashti
    TI__Prodigy 120 points

    Hello Sean,

    I updated the BOM and included the Altium files. You can find everything here:

    https://tidrive.ext.ti.com/u/9QYqMUYGKh3nBioR/a94bad65-4507-402a-92e1-a7f45a69cf5b?l

    Passwort: t13F;srD

    Please be aware that we have an updated version of the isolated weld detection and the RCD. The examples on the reference design are not reccomended for new designs. I can provide you the schematics for the new version as well, if you are interessted in.

    Best Regards,

    Simon