Energy consumption problem study and research of the power industry at home and abroad

Energy consumption problem study and research of the power industry at home and abroad

Since entering the 21st century, the problems of shortage of energy has been around the number of the person’s mood.The world’s population explosion, a large number of energy consumption made the world
Energy tense situation, a large number of various energy there is a reply to rise in price, because of a shortage of time finally don’t let a person feel energy
Enough, a lot of people still lamenting the price rose again, the price of energy but also affects every family user’s heart.And the power consumption of switch power supply
Rarely get attention, because the focus of people mainly lies in the full load or overloading the efficiency of switch power supply problems, but didn’t
Note in light load and no load switch power supply and standby energy consumption problems, in this paper, the energy consumption problem of switch power supply is introduced in the standby time
Energy consumption reducing technology.
The development of environmental protection of energy at home and abroad
In 1992, the United States environmental protection agency (epa) and department of energy (doe) jointly launched the “energy star” project, since November 2008, “energy star”
Started the second edition, set the power adapter on standby energy consumption must be less than 0.3 0.5 W, W or depends on the output power of the adapter.
Standby power consumption is less than in 2010, South Korea announced the implementation of product of lW compulsory measures digital TV on standby energy consumption in l ~ 5 w, set-top box can standby
About 20 ~ 40 w, personal computers and monitors standby energy consumption about 5 ~ 10 w, mobile phone charger standby energy consumption is 0.5
~ 1 w.According to the international economic cooperation organization, a survey said countries due to the standby energy consumption accounts for about 3% ~ 13% of the total energy consumption.system
Meter data is: the Australian l2 %, South Korea 1 l %, 10% in Germany, the UK is about 8%, 7% in Japan
About 5% or so, the United States, Finland is about 5%.At present, China’s average urban household standby energy consumption has accounted for about 10% of the total household energy consumption,
Equivalent to each family to use with a single 15 ~ 30 w “hers”.
At present, most of the electronic equipment under 100 w, such as the power adapter, charger, cordless phone, ADSL, router, LCD display and a DVD
, etc., are adopting off-line flyback switch circuit, will provide 85 v ~ 275 v ac power grid into electronic devices
Need to dc voltage.Normal working state, the loss of the flyback switch power supply mainly includes conduction loss and switch loss, and loss of control circuit
Consumption.Standby mode, because the system output current is close to zero, conduction loss can be ignored, loss and switch
The wastage of the control circuit becomes the primary system standby power consumption.Reducing standby power consumption, should aim at switching loss and reduce the wastage of the control circuit.
With the popularity of home appliances, audio-visual products, the wide application of office automation and the continuous development of network, more and more products have the standby power
Can, such as batteries, remote control, digital display, timing, touch and heat preservation function, etc., to meet to at any time
The user’s requirements.These new products, new technologies, while greatly facilitate our life, also causes a large amount of energy wasted.For example, figure
TV on standby energy consumption in l ~ 5 w, set-top box standby energy consumption of about 20 ~ 40 w, personal computers and monitors
Standby energy consumption is about 5 ~ 10 w, around 0.5 ~ 1 w standby power consumption of mobile phone chargers.According to the international economic cooperation organization, according to a survey by various countries
Standby and the energy consumption accounts for about 3% ~ 13% of the total energy consumption.Statistics is: the Australian l2 %, Korea 1 l %
Left and right sides, Germany 10%, Britain is about 8%, Japan 7%, 5% in the United States, Finland is about 5%.At present, China’s urban households on average
Standby energy consumption has accounted for about 10% of the total household energy consumption, equivalent to each family to use with a single 15 ~ 30 w”
Pilot burner. “standby energy consumption as a stealth blood-sucking worm, wasting energy and formed a huge pressure to environmental protection.
In November 2011, in line with the eu ERP has launched new energy consumption standard of 5 a, 12 v switching power supply “RLS565”
Improve the efficiency of switch power on standby
Cut off the starting resistance Lower clock frequency clock frequency can be smooth decline or sudden drop.Smooth fall is when feedback quantity exceeds a certain threshold,
Through specific module, the realization of clock frequency of the linear decrease.
Switch work mode
1. The QR – PWM for working in high frequency switch power supply of work patterns, when in standby switch to low frequency working mode can reduce standby loss.
2. The PWM and PFM
For rated power when working in PWM mode switching power supply, can also be to switch to the PFM mode to improve standby efficiency, namely fixed when opened
, adjust between the turn off time, the lower the load, turn off the longer working frequency is lower.
Controllable pulse mode (BurstMode)
Serious problems of shortage of energy in the whole world all sorts of non-renewable energy prices rise again rise, with only just take temporary price controls energy consumption problem
Not completely stupid method, the real to do sufficient energy waste not standard, on the one hand, need to find energy alternatives, on the other hand, for the new
Energy generation product not found before, also need the new product technology on energy consumption problems of overhaul, to reduce the energy consumption of the power supply.

How can a switch power supply isolation and the isolation is it?

How can a switch power supply isolation and the isolation is it?

Multimeter is the amount of input and output resistance, if small or direct conduction is isolated, if the value is very big, is isolated
Generally low voltage dc are not isolated, high pressure for isolation of the communication
ask
Is there any logo can be seen that it is isolated or non segregated
answer
Isolation of the high voltage ac, transformer, transformer most as the core, also useful magnetic ring
The isolation is generally low voltage dc, without transformer, there is a inductance, high power of multi-purpose magnetic ring, small power with the inductance of style is more
ask
So watch apart from the transformer is not good…
answer
For high voltage ac more isolation, such as civil lighting power supply of 220 v, transformer, much as magnetic, very few of the circular
The isolation is generally low pressure, without transformer, there is a inductance
And that of the input and output by the multimeter is to pass, if is not isolated, even the transformer, if different is isolation,even if it is made of copper

ask
Can you give an example I cut a figure to see if input fields and output
answer
How does this screenshot
End of the cathode is negative at the input and output, is together, this is called the common ground, can you use a 7805, 7805 of the positive input is high voltage,
After 7805 output is 5 v, but the input and output ground, namely the cathode is together, this is the common ground, is isolated
ask
Well, I see, thank you

Some problems about switching power supply in detail

Some problems about switching power supply in detail

Switch power source into the domestic market, the trend of the fast fierce development still unabated, and increasing situation appear every year, which naturally related to the switch power demand at home and abroad.Demand growth,

Increased, the production will be as increase, however many manufacturer of switch power supply to join but did not make the switch power supply market appear the situation of oversupply, simply add a and lower profits.

But this is only because of the influence of supply and demand relationship.Thus it can be seen that the domestic have registered manufacturer though much more than one thousand, but the whole market of switching power supply or a piece of prosperity.About the switch electricity

The composition of the source, components, advantages and disadvantages have been introduced in front, today is a simple introduce about the protection of switching power supply and function.

First is about the main functions of the switch power supply:

For BBU, RRU, rectifier module, storage battery, the alarm system power supply under-voltage protection

Second, the switching power supply protection for communication equipment

Under an electric and a second electric output overvoltage protection of overheating protection output short circuit current limiting function input under-voltage protection

Time of the switch power supply parts machine corresponding protection

: 1. The input grid filter the noise of the switch power source is mainly from the grid interference filter is used to eliminate the noise of the switch power supply problems and prevent switching power supply noise affect the power grid,

2. Input rectifier filter: its main function is to provide dc voltage converter.Method is to rectifying filtering the input voltage from the network

3. The converter: is an important part of switch power supply.It to dc voltage transform into high frequency ac voltage, and have the effect of isolation part will output to the input power grid.

4. The output rectifier filter, is of high frequency ac voltage rectifier converter output filter to dc voltage, but also to prevent the high frequency noise disturbance to the load.

5. Control circuit: to test the output dc voltage, and its comparison with the reference voltage, amplification.The pulse width modulation generator, so as to control converter to maintain the stability of output voltage.

6. Protection circuit: when switching over-voltage or over-current occurred in power source when short circuit, protect circuit the stop work to protect the load and power supply of switch power supply itself.

The domestic relay market in recent years has been steadily growing state, and does not appear to have stopped.The future will also continue, of course, with the increase of industry competition, enterprises have to transition back and reform.From manufacturing to create, from dedicated to intelligence.Enterprise can only keep continuous development to create energy, in the fierce market competition to locates in the first group of attitude in the face of the challenge.

Switch power market in China in 2012 – enterprise competition pressure user attention

Switch power market in China in 2012 – enterprise competition pressure user attention

Domestic switch power supply enterprises in China has maintained steady growth in recent years, this is undeniable.During the period of

Also a little small fluctuations, but since entering the 2012 years since the width of fluctuation in just a little too normal.

On the user attention: once in January dropped to lows in recent years, index analysis data of more than 200 only.February began to recover to normal level, here we are

March unexpectedly suddenly soared to more than 1300 countries

The highest peak in the history of the switch power supply market.It had to be thought-provoking.Manufacturer of switching power supply, in particular, should be obvious at this time

To the pressure increase, the domestic although part of switch power supply began to market abroad, but domestic client attention is still surging.This makes the

The increase of switch power supply pressure of competition between the enterprises intangible

Switch power market in our country in January this year trough may be associated with national rainfall weather earlier this year as a result causes no scene of switch power supply market

Gas, but in 2 months since the beginning of this march the sudden explosion of user interest are going to have to thought-provoking.

Look from the detail place of switch power supply

Look from the detail place of switch power supply

Many application areas of switch power supply, but it is not easy to get the attention of users in details.Digression: the lift now, like mobile phone,

Are visible, but when the elevator came to a sudden power outage is a very terrible thing, you know why many people will because of sudden power outages and trapped elevator

, that’s why – switch has a fault caused by the switch power supply, this is the details.Here is a switching power supply is applied in the elevator

Example: hangzhou new east garden village, residents at around 5000 households.One morning in 2011, the east sudden blackouts in the new garden housing estate.In this service

29 elevators, a total of more than 20 people are trapped, there was the old man, there are pregnant women.Fortunately, caused no casualties.

And design in accordance with the provisions of relevant standards, residential elevators should be all set the dual power supply, and installation of automatic switching device at the end.When the power of the electric power company

Check the supply, the elevator can automatically switch to standby power load, in order to ensure the normal operation of the elevator will not result in personnel trapped elevator transformation

Process time is short, it only takes a few seconds, the elevator will not be affected.But if the elevator at the end of the automatic switching device failure,

It is possible to cause of elevators.

Why the new east garden district 29 elevators are not automatic switch?All of a sudden power outage caused automatic switching device crash frequency converter, because is electronic products, there are many

Is unpredictable.”Relevant researchers explained,” after the blackout, a normal principle, the circuit will automatically switch to the standby power supply, but because it is

Electronic products, sometimes does not ensure that all circuit can accomplish automatic switch “. Inside the village 89 elevators are affected by different degree, including 60

The elevator quickly returned to normal after automatic switching power supply, but there’s another 29 elevators are shut down.Such a big impact, the reason lies in the switch power supply since

Move the switch was not completed the power switch.

Thus of switch power supply switch is the details of small problems, but it affects many people’s life.

We strive to reach the highest product quality, increases the technical content of science and technology of switch power supply, to provide users with good product quality.

Switch power loss analysis

Switch power loss analysis

Started after the products in the factory process of constant loss, most of the consumption are negligible, it is not to say that the loss is very small Is relative
For it.For the entire product.Take the switch power supply, as an example, general switch power supply in the process of use is invisible to the naked eye loss, cause
As this is a very slow process.Unless it is caused by the impact of serious damage of components.Damage to normal components are unknowingly damage
Consume, but loss to a certain degree, the component loss to not in use, this paragraph of time is the life of the switch power supply, general big losses in the switching power supply
Can be in these places.
A: the input and output rectifier losses, “the output rectifying the loss of the power supply filter loss of the filter capacitor loss of the input surge current suppression circuit
The loss of the input of the rectifier losses
2: the wastage of the main converter
The buffer circuit loss of the filter capacitor loss the wastage of the unreasonable control mode Multilevel power conversion loss drive and protective circuit loss conduction loss control,
Detection, the wastage of the transformer and inductor.

Switching power supply factory test some of the test items and procedures

Switching power supply factory test some of the test items and procedures

Generally when switching power supply manufacturers in the production of quality control is very strict, Francis.Every program should pass strict examination and
The supervision of the quality inspection personnel, and finally at the time of switch power supply, the factory also go through layer upon layer of the test, the following will probably introduce Francis for switching power supply
Field testing program and procedures.
First, some of the most basic tests
Temperature rise test noise testing output voltage noise source loading effect
Safety aspects of the test can reference IEC60950-1
Electromagnetic compatibility aspect can refer to: EN 55022, EN 55024, etc
And other aspects of testing need to pay attention to, also very important
1) boot time run test

(2) the load test of half a full load test no-load test load

(3) the efficiency test of the input and output
The ratio between

4. Testing over-voltage under-voltage protection circuit tested current tested temperature test

5. Off time test
6. If the PC power supply and PG signal test

7. Remote control aging test and half load aged 8 to 10 hours
8. The insulation of the power supply of high pressure test and leakage current

9. ICT test is also called online test which means there is no electricity
Condition test components are in good condition. And the test PCB copper foil whether open etc.

10. There is also a test power supply output ripple voltage
Ac voltage is more than a specified value.

Power classification of thin solution

Power classification of thin solution

A: the normal power supply

Kinds of common power supply is more, here are some more common: switching power supply, rectifier power supply, power supply, PC power supply voltage regulator, transformer
Power supply, regulated power supply, clean/electric arc welding power source power supply, power supply, ac regulated power supply, power supply, custom power supply, inverter power supply for the operation of electric power,
Power controller/driver, dc regulated power supply, communication power supply, modular power supply, inverter power supply, UPS power supply, EPS emergency power supply,
DC/DC power supply, heating, power supply, plating power supply, network, power supply, power adapter, power supply, linear power supply, power supply, inverter power supply, parameters
Power supply and other common power supply.

2: special power supply:

There are several kinds of a special class of power supply, can be subdivided into: aerospace power supply, medical power supply, security power supply, laser power supply, high voltage
The source, military power, and other special power.

Questions about the switch power standby energy consumption standards at home and abroad

Questions about the switch power standby energy consumption standards at home and abroad

Since entering the 21st century, the problems of shortage of energy has been around the number of the person’s mood.The world’s population explosion, a large number of energy consumption made the world
Energy tense situation, a large number of various energy there is a reply to rise in price, because of a shortage of time finally let a person feel not enough energy
Use, many people still lamenting the price rose again, the price of energy but also affects every family user’s heart.And the power consumption problem of the switch power supply
Little attention, because the focus of people mainly lies in the full load or overloading the efficiency of switch power supply problem, did not focus on the switch
Power in light load and no-load and standby energy consumption problems, in this paper, the energy consumption problem of switch power supply is introduced in the standby time of reducing energy consumption
Technology.
In 1992, the United States environmental protection agency (epa) and department of energy (doe) jointly launched the “energy star” project, since November 2008, the first “energy star”
Second edition starts, regulation of the power adapter standby power must be less than 0.3 0.5 W, W or depends on the output power of the adapter.
Standby power consumption is less than in 2010, South Korea announced the implementation of product of lW compulsory measures digital TV on standby energy consumption in l ~ 5 w, set-top box standby energy consumption
About 20 ~ 40 w, personal computers and monitors standby energy consumption about 5 ~ 10 w, around 0.5 ~ 1 w standby power consumption of mobile phone chargers.According to the international
Economic cooperation organization, according to a survey of countries due to the standby energy consumption accounts for about 3% ~ 13% of the total energy consumption.Statistical data is: the Australian l2 %
Germany, South Korea 1 l %, 10%, the UK around 8%, Japan 7%, about 5% in the United States, Finland is about 5%.At present our country
The average urban household standby energy consumption has accounted for about 10% of the total household energy consumption, equivalent to each family to use with a single 15 ~ 30 w “eternal
The lamp “.
At present, most of the electronic equipment under 100 w, such as the power adapter, charger, cordless phone, ADSL, router, LCD display and a DVD
, etc., are adopting off-line flyback switch circuit, the power grid to provide 85 v ~ 275 v alternating current into dc voltage electronic equipment needed.is
Often working state, the loss of the flyback switch power supply mainly includes conduction loss and switch loss, and loss of control circuit.Standby mode, because
Of the system
Output current is close to zero, the conduction loss can be ignored, the switching loss and loss of control circuit of standby power consumption becomes the primary system.To reduce the standby power consumption,
Should aim at switching loss and reduce the wastage of the control circuit.
With the popularity of home appliances, audio-visual products, the wide application of office automation and the continuous development of network, more and more products have the standby function
, such as batteries, remote control, digital display, timing, touch and heat preservation function, etc., to meet the requirements of the user at any time.These new products and new technology
While greatly facilitate our life, also causes a large amount of energy wasted.For example, digital TV on standby energy consumption in l ~ 5 w, machine
Top box of about 20 ~ 40 w standby power, personal computers and monitors standby energy consumption about 5 ~ 10 w, around 0.5 ~ 1 w standby power consumption of mobile phone chargers
.According to the international economic cooperation organization, a survey said countries due to the standby energy consumption accounts for about 3% ~ 13% of the total energy consumption.Statistical data: Australia
L2 % in Italy, South Korea 1 l %, 10% in Germany, the UK around 8%, Japan 7%, about 5% in the United States, Finland is about 5%.Orders,
The average standby energy consumption of Chinese urban households have been accounted for about 10% of the total household energy consumption, equivalent to each family to use with a single 15 ~ 30 w”
Pilot burner. “standby energy consumption as a stealth blood-sucking worm, wasting energy and formed a huge pressure to environmental protection.
In November 2011, in line with the eu ERP has launched new energy consumption standard of 5 a, 12 v switching power supply “RLS565”
Improve the efficiency of switch power on standby
Cut off the starting resistance Lower clock frequency clock frequency can be smooth decline or sudden drop.Smooth fall is when feedback quantity exceeds a certain threshold, through
Specific module, realizes the clock frequency of the linear decrease.
Switch work mode
1. The QR – PWM for working in high frequency switch power supply of work patterns, when in standby switch to low frequency working mode can reduce standby loss.
2. The PWM and PFM
For rated power when working in PWM mode switching power supply, can also be to switch to the PFM mode to improve standby efficiency, namely fixed when opened
, adjust between the turn off time, the lower the load, turn off the longer working frequency is lower.
Controllable pulse mode (BurstMode)
Serious problems of shortage of energy in the whole world all sorts of non-renewable energy prices rise again rise, with only a price control energy consumption problem only treats the symptoms
Cure stupid method, the real to do sufficient energy waste not standard, need to find alternative energy on the one hand, on the other hand, in the new alternative
Product energy not found before, also need to present new products technology on energy consumption problems of comprehensive innovation, in order to reduce energy consumption.

About the characteristics of the switching power supply and input/output characteristic is introduced

About the characteristics of the switching power supply and input/output characteristic is introduced

About the origin of switch power supply problems and the development of its future prospects has been introduced in front and in the future will have update some electric switch
Source products detailed information, please continue to pay attention.Today to introduce the switch power supply under its characteristics and the input and output characteristics of the comprehensive
The introduction of some features about switching power supply:
1. Small volume, light weight, since there is no power frequency transformer, so the volume and weight only 20 to 30% of the linear power supply.
2. Low power consumption, high efficiency, power transistor in the switch state, so the transistor on the low consumption, high conversion efficiency, generally is 60 ~ 70%,
Compared with 30 to 40% linear power supply.
The input features
Short-circuit power input 1. 2. The input current and input voltage is 4. The no-load standby power 5. 6. Surge current voltage frequency
Output characteristic 1. Output current 2. Output over-current, short circuit protection 3. 4. The output voltage efficiency 5. Ripple, noise 6. Linear regulation 7. Load regulation
Protection feature 1. Input under-voltage protection.2. Input overvoltage protection.3. The output over voltage protection.4. The output short circuit protection.5. The output over-current protection.
6. The output power protection.
Environmental features
Operating conditions: the storage environment temperature, relative humidity, vibration and impact.
The operating conditions: 1. Operating temperature, storage environment temperature.2. The relative humidity.3. Air convection.4. The vibration.
EMC characteristics 1. EMI standard.2. The ESD standards.3. The EFT standards.4. A lightning strike.
Safety features 1. Hi – pot.2. The leakage current.3. Safety standards.4. The insulation resistance.
Mechanical properties (1) mechanical plug.2. The pins tension.3. The decline.4. DC line pull to sway test.
Reliability features 1. Aging.2. The device temperature rise.3. The high temperature and high humidity test.4. Low temperature testing.5. Hot and cold shock.
The description of some basic concepts:
EMC: electromagnetic compatibility
Refers to the equipment or system meets the requirements in the electromagnetic environment is not running on the environment of any equipment intolerable electromagnetic interference ability.Due to the
This, the requirements of the EMC include two aspects: on the one hand, refers to the equipment in normal operation for the electromagnetic interference cannot exceed a certain environment
Limit;On the other hand refers to the appliance in environments where electromagnetic interference immunity, to a certain extent the electromagnetic sensitivity.Safety is the security
Specification: about this country and enacted many expressly provided otherwise, this did not elaborate
Mechanical properties, physical properties, well-known communications hardware connection the mechanical properties of the interface between entities, such as interface shape and size of the connector used, lead
Line number and arrangement, fixed and locking devices, etc.this
Like common rules of the plug at ordinary times, all sizes have strict rules.
Load: at the ends of the load is connected to the circuit of the power electronic components.Should not be no load in a circuit, and the power supply directly to the poles are linked together, this connection is called
Short circuit.
Load: the definition of a strain gauge the output external load (matching).Load another definition about genetics, don’t do is introduced here.