24v inverter Car Power Profile

Power Inverter Car Power called , is a way to convert the DC power DC12V and AC220V AC mains the same , for general electrical use , is a convenient power converters , pure sine wave inverters‍ as commonly used in the automotive named.

The inverter is a way to convert the DC power DC12V and AC220V AC mains the same , for general electrical use , is a convenient power converters , as commonly used in the automotive named. 2.DC/DC DC converter power supply , which is usually the car battery 12VDC or 24VDC to 48VDC converted to direct current electrical equipment such as a car.

Car power general use car battery or cigarette lighter power supply , the first such low-voltage direct current is converted to DC 265V or so ; then is the real transformation stage , it will transform high voltage DC to AC 220V, 50Hz for . With the vehicle power supply , you can put all the family moved to the car using small appliances such as mobile phones , laptop computers, digital cameras , car refrigerators, cameras , DVD , etc., thus making the car there is a feeling of home away from home . Since its launch , many limitations of using those appliances in the car will no longer exist , people can really enjoy , " and family -friendly, connected with the world " feeling .

Car power not only apply to vehicle systems , as long as there are occasions DC12V DC power supply , power inverter can be used , will convert DC12V AC220V AC, bring with bypass inverter‍ convenience to people's lives . Car power fully take into account the external environment , when an overload or short circuit protection will be automatically shut down. The output voltage of the power supply feedback to confirm vehicle itself can make the voltage stability, voltage variation is less than the rated load and 10V. It should be noted that the purpose of the vehicle power supply output and the same mains voltage to meet the needs of appliances , but actually the vehicle power supply output is an analog sine wave and the sine wave of the mains is true , the two slightly different , generally do not affect the use, which is the principle vehicle power supply decisions .

Select the vehicle power supply in addition to the price factor to consider is the main vehicle power requirements for the size of the input voltage and output power , in addition to a variety of use due to the large difference in electrical power , so to select the vehicle power supply according to Solar power inverters‍ needs, the principle is enough used mainly.

24 volt power inverters

Power inverter safe

1 . What are the current power inverter models ?

Currently on the market for power inverters have 140W, 450W, 800W, 1200W, 2000W, 3000W, 225W portable , 400W portable .

2 . How to choose the right electric inverters‍ model ?

Optional power inverter can live and work according to your purpose to choose. Eg : 140W power inverter can use a 29- inch color TV and a VCD player .

450W power inverter can be used in general power tools.

800W power inverter can be used to drive a small microwave.

3 . Power inverter using the input power can only come from the vehicle is stationary or running ? Input supply may be derived from the car running state may be a stationary state.

4 . If the car is at rest , can use the power inverter work ? Where to provide input power ?

Car in the stationary state , you can use the power inverter to work , driven by the electrical outlet can get below 150W output power directly from the cigarette lighter , use a dedicated higher than 150W car battery cable clamps to get the power.

5. How to determine the power inverter can be used to obtain the power of the time ?

And supporting power inverter batteries, 5000w power inverter‍ generally amperes (AH) as power units of measurement, such as 80AH battery in addition to electrical power is multiplied by 10 , is carried by electrical power inverter can be used time .

For example , the television 100 watts

÷ 100 W × 10 = 8 hours 80 safe

6. When power inverter work surface temperatures much ? Whether there is a certain security risk ?

Power inverter at maximum power output, not higher than 70 ℃, there will not be a security risk.

7 . Protection device power inverter have?

A ) temperature protection. Surface temperature is higher than 70 ℃, automatic shut-off .

2 ) High voltage protection. The input voltage is 16V ± 0.5V

3 ) low voltage alarm . 220v power inverter‍ The input voltage is 10.5V ± 0.5V

4 ) Low voltage protection. The input voltage is 10V ± 0.5V‍

24 volt power inverters Power inverter

Power inverter when the battery using the battery , the battery voltage drops to 9.5V, the power inverter will automatically shut down to ensure that the car can be started normally , industrial inverters‍ the battery will not be damaged.

How to Protect

Power inverter is an electronic circuit by internal settings, battery protection function automatically . 8 What is the most prone to failure ? How do I exclude ? When using a power inverter , shutdown and alarm if the phenomenon , check the following:

1 ) driven by electrical power exceeds the value of the rated power of the inverter .

2 ) power inverter and battery and electrical connections are good .

3 ) Use the process down , whether the temperature alarm , electric inverters‍ then a period of inactivity can continue to use .

Note that the use of battery power inverter power system voltage value, and read the instructions before using the fine .

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24 volt inverters Knowledge of the power inverter Definitions

Power inverter ( car power ) is a way to convert the DC power DC12V and AC220V AC mains the same , for general electrical use , is a convenient power converters.

?Market solar inverter‍ conditions

Power Inverter in foreign markets was generally welcomed. Abroad due to the higher prevalence of motor vehicles , there is no occasion when they go out in the mains work or travel to connect car battery with an inverter , electrical appliances and power tools driven by what works to promote

After China's entry into WTO, more and more private buyers in the domestic market , therefore , as a DC power inverter for use in the car on the move to AC power converter will bring convenience to your life , but also the essential car owners supplies.

Wide range of uses

Power inverter applies not only to vehicle systems , as long as there is DC12V power of the occasion, can use the power inverter will convert DC12V AC220V AC, bring convenience industrial inverters‍ to your life . 5 high and low voltage alarm and shutdown role is reflected in how ? High and low voltage power inverter when the alarm on and off the red LED lights , and an alarm sounds .

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24v inverter

the load power factor : the ability to characterize the capacitive load inverter with inductive load or . In the sine condition, the load power factor of 0.7 to 0.9 ( hysteresis ) , the rating is 0.9 .

6, rated output current : Indicates the inverter solar inverter‍ within the specified range of the rated output power factor of the load current . Some inverter products given is rated output capacity , the unit in VA or KVA said . The rated capacity of the inverter when the output power factor of 1 ( ie, purely resistive load ) , the rated output voltage of the rated output current of the product.

7 , rated output efficiency: The efficiency of the inverter under specified operating conditions , the output power to input power ratio , in%. Inverter efficiency at rated output capacity for full load efficiency of 10% at rated output capacity efficiency at low load efficiency.

8 , Protection: over-voltage protection : No voltage stabilization measures for the inverter output over-voltage protection measures due to the negative output cut from overvoltage damage.

Overcurrent protection : inverter over-current protection , should be able to ensure that a short circuit in the load current exceeds the allowable value or action from time to time , so from inrush current damage.

9 , starting characteristics : characterizing the performance of the inverter starting with a load capacity and dynamic work. The inverter should ensure reliable starting at rated load .

10 , the noise : the transformer power electronic device , 1500w charge inverter‍ the filter inductor , electromagnetic switches and other components are the fan noise is generated . Normal operation of the inverter , the noise should not exceed 80dB, small inverter noise should not exceed 65dB.

24 volt power inverters Power Inverter buy points

How to choose the correct ups power inverter mainly pay attention to the following points .

1 , the rated output voltage: within a predetermined Off grid inverter‍ fluctuation range of the input DC voltage is allowed , it means that the rated voltage of the inverter should be output . The stability of rated output voltage accuracy is generally defined as follows : In steady-state operation , the voltage fluctuation range should be a limit , such as the deviation does not exceed the rating of ± 3% or ± 5%. Under load mutations or other interfering factors affecting the dynamics of the output voltage deviation should not exceed the rating of ± 8% or ± 10%.

2 , the output voltage imbalance : Under normal operating conditions, the inverter output phase voltage unbalance ( reverse component of the ratio of positive sequence component ) should not exceed a specified value , usually expressed in% as 5 % or 8 %.

3 , the output voltage waveform distortion : When the inverter output voltage is sinusoidal , shall specify the maximum allowable waveform distortion ( or harmonic content ) . Usually to a total distortion of the output voltage waveform that its value should not exceed 5% ( 10% single phase output enable ) .   

4 , rated output frequency of the inverter output solar inverter‍ AC voltage frequency should be a relatively stable value , usually frequency 50Hz. Under normal operating conditions the deviation should be within ± 1 %.

24 volt inverters Circuit diagram and working principle of the common car inverter products

Currently on the market, sales of the largest, the most common car inverter output power is 70W-150W, inverter circuit mainly uses TL494 or KA7500 chip-based power inverter‍ pulse width modulation circuit. 

The entire circuit-board inverter can be divided into two parts, each part of the adoption of a TL494 or KA7500 chips control circuit, including the role of the first part of the circuit is 12V DC car battery, etc. will be provided by high-frequency PWM (pulse width modulation) switching power supply technology to convert into a 30kHz-50kHz, AC 220V or so; the role of the second part of the circuit is the use of the bridge rectifier, filter, pulse-width modulation and switching power output and other technologies, the 30kHz ~ 50kHz, 220V alternating Off grid inverter‍ current into alternating current of about 50Hz, 220V in.

24v inverter inverter power

In the medium and large -capacity photovoltaic system , inverter power output should be less distortion sine wave . This is due in large capacity systems, the use of a square split phase inverter‍ wave power supply , the output will contain more harmonics , high harmonics will generate additional losses , load a lot of photovoltaic systems for communications or instrumentation, these equipment on the grid have higher quality requirements, among the large-capacity photovoltaic power generation system and network operation , in order to avoid contamination of public electricity grid, also called a sine wave inverter output current. DC inverter into alternating current, if the DC voltage is low, the AC transformer step through that get the standard AC voltage and frequency. Large -capacity inverter, due to a higher DC bus voltage, the AC output is generally not required that can achieve step-up transformer 220V, in the small -capacity inverter, due to low DC voltage, such as 12V, 24V, it must be designed to boost circuit. Medium and small -capacity inverters generally have a push-pull inverter circuit, full-bridge inverter circuit and high frequency boost inverter circuit are three push-pull circuit , the step-up transformer neutral plug connected to the positive supply , two power tubes alternatively , the output AC power is obtained , since the ground side of the power transistor connected to the drive control circuit is simple and , in addition to the transformer has a leakage inductance to limit the short circuit current, thereby increasing the reliability of the circuit . The disadvantage is that the use of low transformers, inductive load driving ability is poor . Full-bridge inverter circuit to overcome the shortcomings of the push-pull circuit , the pulse width of the power transistor to regulate the output , i.e., the output AC voltage RMS change. Since the circuit has continued flow loop , power inverter‍ even for inductive load , the output voltage waveform is not distorted . The disadvantage of this circuit is that the upper and lower arm of the power transistor is not common ground , and therefore must be used exclusively drive circuit or the use of isolated power .

24 volt power inverters Principles and Applications of inverters in photovoltaic systems

1 . Requires a high efficiency. Due to the current high prices of solar cells , in order to maximize the use of solar cells, improve system efficiency, we must seek to improve the vehicle power inverters‍ efficiency of the inverter .

2 . Requires a high reliability. Currently photovoltaic systems are mainly used in remote areas, many power plants unattended and maintenance , which requires an inverter circuit with a reasonable structure, strict screening of components and require an inverter with a variety of protection features such as input DC reverse polarity protection , AC output short circuit protection , thermal overload protection and so on.

3 . DC input voltage is required to adapt to a wide range, the terminal voltage of the solar cell and the intensity of sunlight varies with load changes , although the battery voltage of the solar cell has an important role, but because the battery voltage with the remaining battery capacity and internal resistance change fluctuate , particularly when the aging of the battery terminal voltage range is large, such as 12V battery , the terminal voltage may with charge inverter‍ vary between 10V ~ 16V, which requires a larger inverter must be within the range of the DC input voltage guaranteed to work , and to ensure that the AC output voltage stability .

Solar PV inverters connected to the grid layout and safety issues

Today's solar inverter layout needs based on current sensor compact , low-cost and reliable ground current detection scheme . LEM whereby specially designed CT series sensors. 24v power inverter‍ They are rated in the range of 100mA, 200mA and 400mA different current devices provide linear output 5 volts at rated current . At 80 % and 90 % of the rated current conditions , the response time of less than 20 milliseconds and 60 milliseconds. Using high-tech design ( " flux gate " ) is the key to accurately measure small dc or ac current especially under conditions of low offset or drift ; measure DC and AC currents up to 18 kHz . CT can be mounted on a PCB, the small size, light weight, there is a through hole for passing through the phase line . Mounted on the PCB CAS / CASR / CKSR closed-loop current sensor with the same flux gate technology ; can be isolated AC and DC current measurement , they cover the range of 6 to 50Arms rated , the highest rating of three times the value of the measurement , same frequency up to 300 kHz (+ /-3dB). According to the latest requirements of the inverter design trends they were specifically designed to improve the performance of the following areas: common mode interference , temperature drift ( offset and gain ; Depending on the model , the maximum zero temperature drift of 7 to 30ppm / K), the response time ( less than 0.3 sec ) , the insulation level of the +5 volt supply and 3000w solar inverter‍ compact size .

In order to synchronize with the grid , need special control output of the inverter . AC output sine inverter must , so to minimize harmonics , while the current changes to respond quickly to the side of the grid . There must be a sensor using the fast response time and low zero drift. Reduced zero drift caused by temperature changes will also help reduce the need for complex compensation algorithms . In contrast, the sensor monitor MPPT inverter DC input current becomes less appropriate , thus low-cost open- loop sensors .

No access to the grid inverters, such as a rechargeable battery backup system , free from the national grid , but must comply with many of the same safety and efficiency requirements.

PV inverter design must comply with the specifications are likely to become more stringent. For example , the DC input power and limitations as may be allowed to reach some consensus on the level of total harmonic inverter output current ; currently exists with a variety of local restrictions based on the layout solar inverters‍ of the case . This requires accurate measurement of current is much higher than at 50 or 60 Hz mains frequency.

24v inverter Car power converters Introduction

Car power adapter (replaced by another power inverter, Power Inverter) is a way to be a convenient DC12V or DC24V or DC36V or DC48V convert DC electricity and Pure sine wave power inverter‍ the same AC220V or AC110V AC, for general electrical use, is car power converter. Car power converter in foreign markets was generally welcomed. Abroad due to the higher prevalence of motor vehicles, work or travel to a battery driven appliances and a variety of tools to work with a car power adapter connection. After China entered the WTO, the domestic market, more and more private transport, therefore, as a DC car power adapter for use on the move to AC converter, will bring a lot of convenience to your life, is a standing Car loaded with supplies automotive electronics. Through the car cigarette lighter power converter output can be 75W, 100W, 150W, 300W, etc. until the 3000W power specifications. 300W car power converter over power by connecting the cable to be connected to the battery. The appliances connected to the vehicle power output of the converter can be used in a variety of appliances like the car as easy to use at home. Appliances that can be used are: cell phones, laptop computers, digital cameras, cameras, lighting, electric shavers, CD players, game consoles, handheld computers, power tools, car refrigerator and a variety Solar power inverters‍ of travel, camping, emergency medical appliances.

24 volt power inverters Electromagnetic compatibility and immunity to electromagnetic interference

Select the type of equipment to medical or build a good power supply system, care must be taken to improve the supply of electromagnetic compatibility and immunity to electromagnetic interference. Mainly from the following aspects to consider: design. PCB design and layout, in general will contain some high-frequency power signal to any of the tracks on the PCB can serve as an antenna, the length and width of the printed lines will affect the Pure sine wave power inverter‍ resistance and inductance, thus affecting the frequency respond in a timely manner is also coupled to the radio frequency signal circuit and cause problems by printing wire DC signals from adjacent tracks. Therefore, the power supply must be selected medical class brands, with strong R & D strength of the company's products, which in the design and production processes can ensure good quality.