With the increasing number of electronic products in daily life, "energy conservation" will become the 21st century, everyone must face the urgent problem. The California Energy Commission (CEC) will impose a new mandatory standard on energy efficiency for AC-DC and AC-AC external power supplies on July 1, 2006, when almost all electronic products will be Suffer an impact.

The standard will cover all products that use external power supplies (such as chargers and adapters), including mobile phones, home wireless phones, portable music players, handheld game consoles, toys, etc., and require these products in standby and use state More efficient use of energy.

This means that after mid-2006, all transformers, external power supplies, adapters, and chargers used in the United States and sold to the United States must change design.

In addition to saving energy, the new CEC regulations will also have a significant environmental impact. According to the company, if all California external power supplies are able to comply with new standards, each year California will be able to reduce more than 360,000 tons of carbon dioxide emissions, the number is equivalent to 60,000 vehicles per year of radiation.

The regulation states that the sale of electrical products in the United States must first meet the equipment energy efficiency regulations, the regulations for 58 categories of electrical products provides energy efficiency requirements, measurement methods and phased implementation plan. In accordance with the regulatory requirements, electrical products must be qualified laboratories in accordance with the corresponding US regulations or standards for testing to prove compliance with the requirements before they can be sold in California.

CEC certified test methods

introduction

CEC is the abbreviation of the California Energy Commission, its duty is to make the energy market towards the direction of healthy competition.

As of July 1, 2006, California, which exports AC / DC adapters to the United States, must comply with the California Energy Commission's California Energy Efficiency Regulations, Energy Star on the basis of the development of a new energy efficiency regulations.

Below, we analyze the specific scope of CEC certification, definitions, testing, signs and precautions.

range

The scope of the CEC external power supply is defined as: AC / DC for single-phase voltage input or external AC adapter for AC / AC.

definition

Here, we introduce some of the CEC test criteria, such as

⑴ Active Mode: Run mode. Refers to the mode in which the power supply is operating.

⑵ Active Mode Efficiency: working mode energy efficiency. Operating mode Energy efficiency is equal to the ratio of the true output power to the true input power in the operating mode. Usually expressed as a percentage.

⑶ No Load: No load mode. Refers to the product in the connected input voltage, but no load under the circumstances of the model.

⑷ No Load Power: No-load power. Refers to the product in the no-load mode input power.

⑸ UUT: UNIT UNDER TEST is the abbreviation.

⑹ Ambient Temperature: Ambient temperature. Refers to the ambient temperature at which the test was conducted.

⑺ Power Factor (True): Power factor. Its value is equal to the real loss power / apparent power ratio.

⑻ Total Harmonic Distortion (THD): total harmonic distortion.

⑼ Apparent Power (S): Apparent Power. The input voltage and the input current.

(10) Nameplate Input Voltage: Nameplate input voltage, refers to the customer claims on the label of the product input voltage.

11 Nameplate Input Frequency: The frequency of the input voltage declared on the nameplate.

(12) Nameplate Output Voltage: The nominal output voltage of the product on the nameplate. (13) Nameplate Output Current: Nominal output current of the product on the nameplate.

test

(1) Summary: Test regulation, unless otherwise stated, are tested according to the following test conditions. ⑵ test

Instrumentation: Power measurements must be made with a calibrated voltmeter or a power analyzer. The instrument must be calibrated according to IEC 62301 standard. The error must be less than or equal to 2% when the test power is 0.5W. When the test power is less than 0.5W, the error must be less than 0.01W. The accuracy of the power test instrument must be 0.01 W or better. The measured voltage and current errors must be less than or equal to 2%. (3) Test room According to the standard of IEC 62301, the air flow of the test room must be 0.5m / s or less, the surrounding ambient temperature must be controlled within 23 ℃ ± 5 ℃, the sample must be placed on the test bed without heat conduction On the test. Products that are used outdoors, if additional test requirements are required, must be stated in the report.

(4) Test voltage According to the standard of IEC 62301, the fluctuation range of the test voltage can not exceed ± 1% of the specified test voltage and ± 1% of the specified test frequency. If the input voltage of the nameplate is a wide voltage, the test voltages are 115V / 60Hz and 230V / 50Hz. If the nameplate indicates a single voltage input, the test voltage is one of the two test voltages close to each other.

(5) the results of the California energy efficiency law to determine from July 1, 2006, where the external power supply exports to the United States California must meet the following table in the average energy efficiency requirements and no-load power requirements (see Table 1)

From January 1, 2008, where the external power supply to the United States California must meet the following table TABLE2 the new average energy efficiency requirements and no-load power requirements (see Table 2)

All tests must take into account 100%, 75%, 50%, 25% of the load current indicated on the nameplate (note that the load tolerance here can not exceed ± 2%) and record its input power, Input current, power factor, output voltage, and THD (total harmonic distortion), and then according to

Energy efficiency = (output voltage × output current) / input power

To calculate the current energy efficiency value, and then 100%, 75%, 50%, 25% under the four load conditions measured average energy value, the average energy efficiency, in addition, must test the output current of 0% Of the input power value, the above test of the average energy efficiency and no-load power value in accordance with the TABLE1 and TABLE2 limit requirements to determine whether the energy efficiency of which signs.