EMC FLEX BLOG A site dedicated to Automotive EMC Testing for Electronic Modules

WPT Fine Positioning Architecture

3. February 2016 07:46 by Christian in
This is an implementation architecture example for command & control approach including the alig

This is an implementation architecture example for command & control approach including the alignment and pairing procedure using low power excitation (LPE).




PDCC = Primary Device Communication Controller
SDCC = Secondary Device Communication Controller
SECC = Supply Equipment Communication Controller
EVCC = Electric Vehicle Communication Controller
WLN = Wireless Local Network
LPE = Low Power Excitation


(S-1) SECC periodically broadcasts beacons. EV is approaching to the SECC area and EVCC receives the beacon
(S-2) EVCC sends a request to the associated SECC. Receiving the request, SECC will find a vehicle entering the SECC area. At this point, the communication is established.
(S-3) EVCC and SECC exchange each status.
(S-4) EVCC and SECC exchange each compatibility information.



References: IEC 61980-2

EV Electronic Components Certification Standards

7. October 2015 06:39 by Christian in
CISPR 25 - Radio Disturbance Characteristics for the Protection of Receivers Used on Board Vehicles,

  • CISPR 25 - Radio Disturbance Characteristics for the Protection of Receivers Used on Board Vehicles, Boats, and on Devices
  • IEC 60068-2-11 - Environmental Testing - Salt Mist
  • IEC 60068-2-60 - Flowing Mixed Gas Corrosion Test
  • IEC 61000-4-4 - Electrical Fast Transient/Burst Immunity Test
  • IEC 61000-4-5 - Surge Test
  • IP 6K - Dust Tight
  • IP 9K - High Pressure/Steam Jet Cleaning
  • ISO 7637-2 - Road Vehicles - Electrical Disturbances from Conduction and Coupling - Electrical Transient Conduction Along Supply Lines Only
  • ISO 7637-3 - Road Vehicles - Electrical Disturbances from Conduction and Coupling - Electrical Transient Transmission by Capacitive and Inductive Coupling via Lines Other Than Supply Line
  • ISO 10605 - ESD Immunity
  • ISO 11452-2 - Radiated Immunity
  • ISO 11452-4 - Conducted Immunity
  • UL 2251 - Plugs, Receptacles and Couplers for Electric Vehicles

EV Charging Stations Certification Standards

7. October 2015 06:34 by Christian in
CSA 22.2 No. 107.1-01 - Power SuppliesFCC Part 15.107 - Conducted EmissionsFCC Part 15.109 - Radiate

  • CSA 22.2 No. 107.1-01 - Power Supplies
  • FCC Part 15.107 - Conducted Emissions
  • FCC Part 15.109 - Radiated Emissions
  • FCC Part 15.203 - Antenna Requirements
  • FCC Part 15.207 - Conducted Emissions
  • FCC Part 15.225 (a) - Field Strength of Fundamental Emission
  • FCC Part 15.225 (b,c,d) - Field Strength of Spurious Emissions
  • FCC Part 15.225 (e) - Frequency Stability
  • FCC Part 22 - Public Mobile Services
  • FCC Part 24 - Personal Communication Services
  • ICES-003 - Digital Apparatus
  • NEMA 250-2003 - Enclosures for Electrical Equipment (1000 Volts Maximum)
  • RSS-132 - Cellular Telephones Employing New Technologies Operating in the Bands 824-849 MHz and 869-894 MHz.
  • RSS-133 - 2 GHz Personal Communication Services
  • RSS-210 - License-Exempt Radio Apparatus (All Frequency Bands): Category I Equipment
  • UL2202 - Electric Vehicle (EV) Charging System Equipment
  • UL2231-1 - Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: General Requirements
  • UL2231-2 - Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: Particular Requirements for Protection Devices for Use in Charging System
  • UL Subject 2594 - Electric Vehicle Supply Equipment

Definitions for Acronym EMC

6. October 2015 05:50 by Christian in
EMC Electromagnetic Compatibility EMC Electric Membership Corporation EMC Easy Media Creator (Roxio)

EMC Electromagnetic Compatibility
EMC Electric Membership Corporation
EMC Easy Media Creator (Roxio)
EMC Enhanced Machine Controller (sourcefourge.net project)
EMC Environmental Modeling Center
EMC Educational Media Center
eMC Electronic Medicines Compendium (UK)
EMC Equilibrium Moisture Content (lumber)
EMC European Music Council (International Music Council)
EMC Encephalomyocarditis
EMC Export Management Company
EMC Emergency Management Coordinator
EMC Excellence in Manufacturing Consortium (Canada)
EMC Encyclopédie Medico-Chirurgicale
EMC Executive Management Committee
EMC Epoxy Molding Compound
EMC Emerging Market Countries
EMC Event Mean Concentration (mean concentration of pollutants in the runoff from a storm event)
EMC Education Management Corporation (New Jersey; est. 1989)
EMC Electromagnetic Capability
EMC Emergency Control
EMC Environmental Management Corporation (O'Fallon, MO)
EMC Energy Management Company
EMC Erasmus Medical Center (Rotterdam, The Netherlands)
EMC Electromagnetic Calorimeter (device to measure electromagnetic energy deposition in high energy/nuclear physics)
EMC Emerging and other Communicable Diseases Surveillance and Control
EMC Environmental Management Corporation
EMC Essential Mixed Cryoglobulinemia
EMC Éducation Médicale Continue
EMC European Muon Collaboration
EMC Electronic Media Claim(s)
EMC Equity Membership Candidate
EMC Electromagnetic Control
EMC Engineering Management Conference
EMC Equity Market Capitalization
EMC ExpandoMetaClass (programming language; Groovy)
EMC Electro Motive Corporation
EMC Extended Math Coprocessor
EMC Energy Market Consultants (UK) Ltd
EMC Enterprise Management Center
EMC Emirates Motor Company (United Arab Emirates)
EMC Episcopal Missionary Church
EMC Expanded Medical Capacity
EMC European Mining Course
EMC Electromagnetic Casting
EMC Ethyl Methyl Carbonate
EMC Emerging Markets Communications, Inc.
EMC Evangelical Mennonite Conference
EMC Energy Management Controller
EMC Erdenet Mining Corporation (Mongolia)
EMC Electromagnetic Conductivity
EMC Evolved Monkey Combat
EMC Equivalent Magnetic Current
EMC Edema Macular Cistoide
EMC Electromagnetic Channel
EMC Eagle Motor Company
EMC Electromagnetic Charge
EMC Editing Machines Corporation
EMC European Masters Championships
EMC Electrician's Mate Chief (USN Rating)
EMC Electrical Measurements Console
EMC Ensephalomyocarditis
EMC Execution Management Control (TBMCS)
EMC Endometrial Curettage (Ob/Gyn)
EMC Enhanced Super Multi-Coatings
EMC Enterprise Monitoring and Coordination
EMC Engineered Military Circuit
EMC Emergency Message Change
EMC Exercise Management and Control
EMC Exercise Maneuver Control
EMC Electronic Molding Corporation (former electronic component manufacturer in Woonsocket, RI)
EMC Egan Marino Corporation
EMC Econoway Motor Coach, Inc.
EMC Environmental Moisture Content (material property)
EMC Educational and Methodological Council
EMC Enlisted Management Category
EMC Electronic Maintenance Complex
EMC Electronic Material Change
EMC Enraged Mad Customer
EMC Elevator Motor Controller
EMC Educational Methodical Consortium
EMC Equipment Manufacturers Code
EMC Emerging Multi-National Carriers
EMC Electro-Mechanical Controller
EMC ElementoMadera.com
EMC Evolution of Math Communication in the Era of Digital Libraries
EMC Exxon Mobil Canada Ltd
EMC Eisenhower Medical Center (Rancho Mirage, CA, founded 1970)
EMC Every Minute Counts (various organizations)
EMC Executive Meeting Center (various locations)
EMC Eight Mile Creek (restaurant; New York, NY)
EMC Electric Mobility Canada (Mississauga, Ontario, Canada)
EMC Educational Media Collection (various schools)
EMC Essential Media Communications (Australia)
EMC Elan Microelectronics Corp.
EMC Event Management Center (various organizations)
EMC Everything Must Change
EMC Euro Mobilfunk Center (German mobile goods)
EMC Executive Management Consulting (various locations)

ISO 6469-3:2014 - EV Protection of persons against electric shock - Isolation Resistance Measurements

4. October 2015 12:31 by Christian in
ISO 6469-3 Voltage Classes Voltage Class Maximum Working Voltage


ISO 6469-3 Voltage Classes

Voltage Class

Maximum Working Voltage

V (d.c.)

V(a.c.) RMS

A

0<U<=60

0<U<=30

B

60<U<=1500

30<U<=1000

The values 60 V d.c./30 V a.c. (rms) are selected taking into account humid weather conditions




Isolation resistance measurements for voltage class B electric circuits

Prior to the measurement, the device under test (DUT) shall be subjected to a preconditioning period of at least 8 h at (5+/- 2) °C, followed by a conditioning period of 8 h at a temperature of (23+/- 5) °C, a humidity of 90 (+10%, -5%), and an atmospheric pressure of between 86 kPa and 106 kPa.

Alternative preconditioning and conditioning parameters may be selected provided transition across the dew point occurs shortly after the beginning of the conditioning period. The isolation resistance shall be measured during the conditioning period at a rate from which the lowest value can be determined.

 

Isolation resistance measurements of the balance of electric power systems

The test voltage shall be a d.c. voltage of at least the maximum working voltage of the voltage class B power system and be applied for a time long enough to obtain stable reading. If the system has several voltage ranges (e.g. because of boost converter) in conductively connected circuit and some of the components cannot withstand the maximum working voltage of the entire circuit, the isolation resistances of components can be measured separately by applying their own maximum working voltages after those components are disconnected.

 

The following test procedure combines the measurement of the isolation resistance of the live parts of the voltage class B balance of electric power systems against the vehicle electric chassis and against the live parts of the voltage class A balance of auxiliary electric systems.

  • Traction batteries shall be disconnected at their terminals from the power system.
  •  Electric power sources of the voltage class B power systems other than the traction batteries (fuel cell stacks, capacitors) may be disconnected at their terminals from the power system; if they remain connected, power generation shall be deactivated. 
  • Barriers and enclosures shall be included unless evaluations prove otherwise.
  • All live parts of the balance of electric power systems (voltage class B) shall be connected to each other.
  • All exposed conductive parts of the balance of electric power system shall be connected to the electric chassis.
  •  Batteries of the auxiliary electric systems (voltage class A) shall be disconnected at their terminals from the auxiliary circuits.
  •  All live parts of the balance of auxiliary electric systems (voltage class A) shall be connected to the electric chassis.

Then the test voltage shall be applied between the connected live parts of the voltage class B balance of electric power systems and the electric chassis. 

The measurements shall be performed using suitable instruments that can apply d.c. voltage (e.g. megohmmeter, provided they deliver the required test voltage). Alternatively the isolation resistance may be measured using the test procedure for the measurement of the RESS as given in ISO 6469-1 with the balance of electric power system connected to an external power source.

 Isolation resistance measurement of the voltage class B electric power sources

The measurement of the isolation resistance of an RESS, if any, shall be in accordance with ISO 6469-1. The measurement of the isolation resistance of a fuel cell stack, if any, shall be in accordance with ISO 6469-1 with the fuel cell stack in operation.

Alternatively for the measurement of the isolation resistance of a fuel cell stack, the entire mechanical structure of the fuel cell system (including the cooling system with its cooling medium) shall be considered.

Prior to the measurement, stop power generation after operation at maximum output according to the manufacturer's specification. The voltage across the fuel-cell stack power terminals shall be discharged. All cables shall be disconnected from the fuel-cell stack power terminals, and all other cables from other electric terminals of the fuel-cell stack. All cooling pipes, fuel pipes, and air pipes shall remain connected. The applied test voltage shall be at least the maximum open circuit voltage of the fuel cell stack. Apart from these specific conditions, the procedure shall be performed as given in Isolation resistance measurements of the balance of electric power systems.

 Isolation resistance measurement of entire voltage class B electric circuits

The isolation resistance of entire conductively connected voltage class B electric circuits may be measured using the test procedure for the measurement of the RESS given in ISO 6469-1 with the balance of electric power system connected to the voltage class B power sources.

Alternatively, the isolation resistance of entire conductively connected voltage class B electric circuits may be measured using an isolation resistance monitoring system, if installed on the vehicle, provided that its accuracy is sufficiently high.

In case electric or electronic switches exist in the circuit (e. g. transistors in power electronics), these switches shall be activated. If these switches cannot be activated, the relevant part of the circuit may be measured separately in accordance Isolation resistance measurements of the balance of electric power systems.

Instead of being measured, the isolation resistance of the entire conductively connected circuit may be calculated using the measured resistances of the power sources and the balance of electric power system.


Christian Rosu