EMC electromagnetic compatibility testing

Home appliance EMC testing service

The electromagnetic interference sources of household appliances are mainly generated by sparks generated during the operation of the commutator motor inside the appliance, as well as the action of mechanical switches, various controllers, and protectors. For example, vacuum cleaners, hair dryers, mixers, razors, and other electric motors with commutators generate electromagnetic interference during operation when the electric brushes come into contact with the commutators to form sparks; Electric pots, irons, ovens, washing machines, etc. generate electromagnetic interference due to frequent on-off movements; The high current required for starting the air conditioner will temporarily decrease the voltage of the power grid, and the starting of inductive loads such as motors will cause a decrease in the power factor of the power supply. The power electronic devices in the variable frequency air conditioner will also generate power harmonics, etc; The multifunctional controller of the electric fan is equipped with controllable silicon devices, which generate high-order harmonic disturbances; Home appliances with remote control, fully automatic washing machines, electric water heaters, microwave ovens and other household appliances with microprocessors use two-level digital signals that can cause electromagnetic interference, and as the clock frequency continues to increase, the interference frequency can reach several hundred megahertz; The leakage of electromagnetic energy generated by microwave ovens and induction cookers not only causes electromagnetic interference, but also poses a threat to human health.
CISPR14-1 and CISPR14-2 are the main electromagnetic compatibility standards for household appliances, while microwave ovens and induction cookers (household electromagnetic induction appliances) belong to Group B of industrial, scientific, and medical (ISM) equipment, so their electromagnetic interference characteristics should comply with the provisions of CISPR11. The corresponding electromagnetic compatibility standards for household appliances in the EU region are EN 55014-1 and EN55014-2, while microwave ovens and induction cookers are EN55011.

In the US market, ordinary household appliances are classified as Unintentional RF Equipment under FCC Part 15 and require "validation" for consumer ISM devices. They must meet the requirements of FCC Part 18 and the certification mode must select a Declaration of Conformity (DOC) or Certification.

CISPR 14-1/EN 55014-1

Launch of household appliances and electric tools

CISPR 14-2/EN 55014-2

Resistance to collapse of household appliances and electric tools

CISPR 11/EN 55011

Radio interference of engineering medical (ISM) equipment

EN61000-3-2

harmonic current

EN61000-3-3

Voltage fluctuation and flicker limits

IEC/EN61000-4-2

Electrostatic Discharge

IEC/EN61000-4-3

Radio frequency radiation electromagnetic field

IEC/EN61000-4-4

Electric fast transient pulse train

IEC/EN61000-4-5

surge

IEC/EN61000-4-6

Conducted disturbances caused by radio frequency field induction

IEC/EN61000-4-11

Voltage temporary interruption, short-term interruption

FCC Part 15

Products containing unintentional and intentional radiation sources

FCC Part 18


 
Lighting EMC testing service


Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in its electromagnetic environment in compliance with requirements without causing intolerable electromagnetic interference to any device in its environment. EMC includes two requirements: on the one hand, it refers to the requirement that the electromagnetic interference generated by the equipment to the environment during normal operation cannot exceed a certain limit (EMI); On the other hand, it refers to the device having a certain degree of immunity to electromagnetic interference present in the environment, namely electromagnetic sensitivity (EMS).

Except for incandescent lamps (including halogen lamps) that are not equipped with dimming devices or electronic switches and do not require EMC testing, all other lamps need to undergo EMC testing, and other lamps without electronic devices are exempt from EMS testing.

Luminaires and lighting fixtures in the United States need to comply with the requirements of FCC Part 18 and complete the Declaration of Conformity (DoC) certification.

Test items/test standards

Electromagnetic interference detection for lighting products/CISPR15, EN55015

Lightning anti-interference detection/IEC/EN 61000-4-5

Electromagnetic anti-interference testing of lighting products/IEC/EN61547

Conducted anti-interference testing/IEC/EN 61000-4-6

Current harmonic detection/IEC/EN 60555-2, IEC/EN 61000-3-2

Power frequency magnetic field anti-interference detection/IEC/EN 61000-4-8

Voltage flicker detection/IEC/EN 60555-3, IEC/EN 61000-3-3

Voltage transient drop anti-interference detection/IEC/EN 61000-4-11

Static discharge reactance interference detection/IEC/EN 61000-4-2

Oscillatory wave immunity test/IEC/EN 61000-4-12

Radiation anti-interference detection/IEC/EN 61000-4-3

Harmonic anti-interference/IEC/EN 61000-4-13

Fast pulse group anti-interference detection/IEC/EN 61000-4-4

Industrial, Scientific, Medical Equipment/FCC Part 18



EMF electromagnetic field testing certification

Due to the fact that electromagnetic fields (EMF) can cause dizziness, vomiting, childhood leukemia, adult malignant brain tumors, amyotrophic lateral sclerosis, loss of fertility, cancer, etc., they seriously endanger human health. Therefore, in the field of lighting, in order to protect the central nervous system tissues of the exposed human head and trunk, and reduce their impact on the human body, it is necessary to establish a reasonable method for evaluating the electromagnetic field in the surrounding space of lighting equipment, namely the IEC/EN62493 standard.



Application scope of IEC/EN62493

This standard applies to the assessment of human exposure to electromagnetic fields in lighting equipment. This assessment consists of an induced current density of 20 kHz to 10 MHz around the lighting device and a special absorption ratio (SAR) of 100 kHz to 300 MHz



Applicable product scope

All indoor and outdoor lighting equipment intended for lighting purposes, with the basic function of generating and distributing light, and intended to be connected to a low-voltage power supply network or operated on batteries; General lighting equipment refers to all industrial, residential, public places, and street lighting equipment; One of the main functions is the lighting part of the multifunctional device for illumination.