220 volt power inverters Principle Power Inverter

Using a thyristor circuit to convert the direct current alternating current, this corresponds to a reverse process of the rectifier, the inverter defined. For example: Pure sine wave power inverter‍ Application thyristor electric locomotives, so that when the downhill braking DC motor as a generator to run the locomotive's potential energy into electrical energy, trans go to the AC grid. Another example is the operation of a DC motor, to make it quick braking, the electric motor as a generator also allows operation of the motor kinetic energy into electrical energy, anti-delivered to the grid. 

The inverse DC into AC inverter circuit circuit called. In certain cases, the same set of thyristor rectifier circuit not only for, but also as an inverter. 

Converter in the inverter state, if the inverter AC side connected to AC power, the inverter converts DC to AC power with a frequency counter to go, called active inverter. If the change is not the AC side current grid connection, but directly to the load, which is a frequency inverter converts DC or AC adjustable frequency supplied to the load, then called passive inverter. AC frequency converter uses this principle to work. Except for the active solar inverters‍ inverter DC reversible speed control system, but also for the exchange of spare lines rotor induction motor cascade control and other aspects of HVDC.

220 volt inverter There are several reasons

1, car line aging, 

2, the lighter the line is bad battery 

3, cigarette lighter cable connected to the battery wire is too thin 

4, the contacts on the lighter oxide layer exposed, 

5, the cigarette lighter to the battery wires are relatively small, with not a lot of load 

6, is not recommended to take power Pure sine wave power inverter‍ from the cigarette lighter with a 120W or more appliances 

Q: 500W inverter I used 20A / H is more than 200W battery with fixed appliances 

A: Yes, 20A / H is at best only battery charger 200W or less, if you want to bring Electric 500W or less, please select more than 60A battery,‍

220v inverters Car inverter FAQ

Q: take power, 300W inverter from the cigarette lighter with a desktop computer can not afford 

A: I suggest you do not take vehicle power inverters‍ power from the cigarette lighter with more than 120W or more appliances, cigarette lighter can withstand direct current 10A probably about 100W, because the battery into the cigarette lighter has about 2 meters wire connected to the battery and the negative pole Case Ground vehicles, loss of too much voltage and current. The inverter can not maintain it detects the voltage and current starts working rejected start voltage of the inverter is preferably at 11-13V. 

Solution: 1 

1, Bold battery positive wire to the cigarette lighter, 

2, use the wire to the negative battery cigarette lighter, 

3, considering that the battery is connected to the cigarette lighter has a 2M long wire, select 2.5 square or larger wire connection 

Solution: 2 

Clip on the line connecting the positive and negative first wife battery inverter is connected directly to the car battery, you can start Electric 300W or less 

Q: The inverter plugged into the car Off grid inverters‍ cigarette lighter, buzzer alarm, or take a load alarm, 

220 volt power inverters Car Inverter brief

Car inverter (power converters, Power Inverter) is a way to convert the DC power DC12V and AC220V AC mains the same, for general electrical use, is a convenient Pure sine wave power inverter‍ vehicle power converters. Car power inverter in foreign markets was generally welcomed. Abroad due to the higher prevalence of motor vehicles, work or travel to a battery driven electrical connector and a variety of tools to work with inverters. After China entered the WTO, the domestic market, more and more private transport, therefore, as a DC car power inverter for use on the move to AC converter, will bring a lot of convenience to your life, is a standing Automotive vehicle loaded with supplies. By car cigarette lighter output inverter can be 20W, 40W, 80W, 120W 150W power until the specification. Then a large number of power inverter to be received via cable on the battery. The appliances connected to the output of the power 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, vehicle power inverters‍ car refrigerator and a variety of travel, camping, emergency medical treatment.

220 volt inverter Automotive power inverter

Car power inverter is to convert DC car engine or car battery on alternating current, electrical products for general use, is a more convenient vehicle power conversion equipment. AC power inverters‍ It is commonly used in automotive automotive supplies. It can be used by the usual appliances we use electricity in order to work on the car, such as televisions, laptop computers, electric drill, emergency medical equipment, military vehicles and equipment, can be used in various industries. The output waveform according to points, car power inverter sine wave output and can be divided into two kinds of square wave output. The former can provide uninterrupted, high-quality alternating current, can be adapted to any load, but the high technical requirements and costs, the circuit structure is more complex. The latter provides poor quality alternating current, and the load capacity is poor, can not pick "inductive load." Despite many shortcomings, but its low technical requirements, small size, simple circuit, low prices. Taking these two advantages, at present, I sold the car power inverter is to take the output analog sine wave program, compared with the effect of improving the use of a square wave, not only can Pure sine wave power inverter‍ drive inductive loads, and has a small size, light weight High conversion efficiency, output voltage stability, reliability, protection function characteristics. Is to become mainstream products on the market.

220 volt power inverters Car power difference

UPS is an uninterruptible power supply (uninterruptible power system) the title, is the ability to provide continuous, stable and uninterrupted power supply important Pure sine wave power inverter‍ external devices. UPS back-divided according to the principle, on-line and on-line interactive three categories. UPS name suggests, it is a such a machine, it stops the supply of electricity in the city, I can keep a power supply, so that people have time to save, and then calmly turned off the machine. UPS, on-line and back-up into several, it has power at work in the machine, it will be mains AC inverter, and stored in its own power, once the power supply is stopped, it will be able to provide power to the computers maintaining a period of work, holding time may be 10 minutes, half an hour and the like. 

Mobile power can be used as mobile phones, digital cameras, digital cameras, laptops, PDA, PSP, MP3/MP4 and other digital electronic charging power supply or external power supply, you can charge multiple digital products, digital products can also be long Time continuous power supply, solve product digital product can not be charged in the absence of mains power conditions and problems can not work for a long time. Mobile Solar power inverters‍ power products due to a large-capacity, wide-compatible, lightweight fashion, intelligent safety features and has been widely welcomed.

220 volt inverter Car Power Fundamentals

According to the basic principles of power inverter , using analysis of existing data is derived , presents a square wave inverter production methods and to AC power inverters‍ debug .

The basic principle of a system

The inverter power input for the battery (+12 V, capacity 90A · h), frequency output is a square wave voltage (50Hz, 310V). The block diagram shown in Figure 1 . Currently , new technologies constitute DC / AC inverter lot, but taking into account the specific conditions of use and cost, and reliability of the power supply still uses typical secondary transformation, ie DC / DC converter and a DC / AC inverter . First, the DC / DC converter to the inverter DC12V high frequency square wave voltage by boosting the high-frequency step-up transformer , and then rectified and filtered to obtain a stable DC voltage of about 320V ; then the DC / AC inverter for converting a square wave mode , will become a stable DC voltage rms slightly larger than the inverse square-wave voltage of 220V ; then obtained by LC filter 24 volt power inverters‍ frequency of 50Hz is 220V AC voltage to drive the load.

220v inverters DC / DC conversion

Because of relatively low voltage side of the transformer primary , the transformer in order to improve the utilization of lower cost , DC / DC conversion shown in Figure 2 , push-pull circuit , the primary center tap connected to the battery , with the ends of the switch control , alternate work can improve Solar power inverters‍ the conversion efficiency. The push-pull circuit with fewer switching devices , double-ended working volume of the transformer is relatively small , the duty cycle can be increased , increasing the output power ....

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220 volt power inverters Kind of vehicle power

( Power converters , Power Inverter) is a way to convert the DC power DC12V and AC220V AC mains the same , for general electrical use , is a convenient vehicle power 24 volt power inverters‍ converters. Car power inverter in foreign markets was generally welcomed. Abroad due to the higher prevalence of motor vehicles , work or travel to a battery driven electrical connector and a variety of tools to work with inverters . After China entered the WTO, the domestic market, more and more private transport , therefore , as a DC car power inverter for use on the move to AC converter , will bring a lot of convenience to your life, is a standing automotive vehicle loaded with supplies. By car cigarette lighter output inverter can be 20W, 40W, 80W, 120W 150W power until the specification. Then a large number of power inverter to be received via cable on the battery. The appliances connected to the output of the power converter can be used in a variety of appliances like the car as easy to use at home . Can be used in appliances include: cell phones, laptop computers, digital cameras, cameras, lighting, electric shavers , CD players , game consoles , PDAs , printers , power tools, car refrigerator and a variety of travel , camping , medical aid appliances. Power is the power part of the electronic device , is a highly versatile electronic products. It has been widely used in various industries and daily life, its quality greatly affects the reliability of electronic devices , with a load capacity level and the strength of its conversion efficiency is directly related to its scope of application . Square wave inverter is a low-cost , Solar power inverters‍ extremely simple conversion method , which applies to all kinds of rectifier load , but for the adaptation of the transformer load is not very good , there is a large noise.

220v inverters Power inverter can be used in automotive systems it?

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 Solar power inverters‍ convenience to your life .

5. High and low voltage power inverter alarm and how the role is reflected off ?

High and low voltage power inverter when the alarm on and off the red LED lights , and an alarm sounds .

6. What power inverter for battery protection function is ?

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 , the battery will not be damaged.

7 . How to achieve power inverter battery protection ?

Power inverter is an electronic circuit by internal settings, battery protection function automatically .

8. What power inverter failure is most likely to occur ? 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 24 volt power inverters‍ electrical connections are good .

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

220 volt inverter In order to synchronize with the grid , need special control output of the inverter .

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 Car power inverters‍ 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 of Pure sine wave power inverter‍ the case . This requires accurate measurement of current is much higher than at 50 or 60 Hz mains frequency.

220 volt inverter Phase inverter product features

(1) The inverter uses the CPU control, high-quality, intelligent sine wave output, is a unique characteristic of this product. 

(2) The product of the inverter output can load various types of equipment, such as fans, refrigerators, air conditioners, electric drills, motors, fluorescent lamps, Solar power inverters‍ gas lamps and other home appliances, communications equipment, industrial equipment. It makes up for square wave inverter inverter output load harmful shortcomings. 

Note: Before using the device, the device must be confirmed three-phase four-wire (one of which is ground) or three-phase five-wire (one of which is ground) 

(3) intelligent switch design for easy operation. 

(4) excellent output short circuit protection design, when the inverter is in battery mode, in case of a short circuit, the inverter will automatically turn off the machine. Can resist the impact of high current startup loads. 

(5) complete overload protection is designed to effectively protect the safe operation of the inverter when the load is 100% -120% range, the inverter will automatically Pure sine wave power inverter‍ shut down about 30 seconds, when the load is greater than 120% of the inverter immediately shut down automatically. 

(6) Battery protection: a single battery voltage is 10 volts (limited to maintenance-free battery) 

(7) interference protection: Surge Protection 

(8) the maximum protection of the mains voltage is 260VAC-270VAC, 170VAC minimum 

(9) When the R-phase mains is normal, the battery will be charged automatically. 

(10) When the electricity less one or more phases, as well as three-phase socket problem, the inverter will operate in battery mode. 

(11) When the inverter operates in batterypower sinverter‍  mode, if there is more than one phase or not, there will be no output of the inverter can not load.

220 volt inverter sine wave inverter Green Features

1, overload protection function:
  When the AC output power over a given power, the Off grid inverters will automatically cut off the AC output, while the buzzer sounding. Human off switch until after the revocation of the load, turn on the inverter, the inverter returns to normal.
2, overheating protection function:
  If internal chassis temperature control section is too high, the device will automatically cut off the Solar power inverters output, buzzer alarm. After the temperature returns to normal, it will automatically restore the AC output.
3, short-circuit protection function:
 When the AC output terminals are short-circuited directly or indirectly from the outside, the inverter will automatically cut off the AC output. Until a clear short-circuit fault, the inverter output auto-reply. This feature is extremely powerful protection against damage to the inverter.

Power inverter safe

1 . What are the current power inverter models ?
Currently on the market for power Off grid inverter inverters have 140W, 450W, 800W, 1200W, 2000W, 3000W, 225W portable , 400W portable .
2 . How to choose the right 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  solar inverters   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, 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 5000 watt inverter 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 . The input voltage is 10.5V ± 0.5V
4 ) Low voltage protection. The input voltage is 10V ± 0.5V

Power devices Category

① GTR power transistor (Giant Transistor):
GTR i.e. bipolar transistor of the power transistor (bipolar transistor), which is the so-called bipolar current from the two kinds of electrons and holes formed in the carrier. Generally use a Darlington 24 volt inverters configuration. Its advantages are: high current density and low saturation voltage. Its disadvantage in that the advantages of the MOSFET (see below).
② MOSFET (Metal Oxide Semiconductor Field Effect Tyansistor)

Inverter varieties and their classification

1, according to AC power inverter output frequency can be divided into frequency inverters, frequency counter and a high-frequency inverter . The inverter frequency is 50 ~ 60Hz frequency inverter ; common IF frequency inverter is 400Hz to ten KHz; ordinary high-frequency inverter frequency is more than ten KHz to MHz.
2, according to the number of phases of the inverter output can be divided into single-phase inverter , three-phase  car power inverter  and multiphase inverter.
3 , according to the whereabouts of the inverter output power can be divided into active and passive inverter inverter . Where will the power inverter output power to industrial inverters walks , called active inverter ; Where the inverter output power to the inverter output of a power load is called passive inverter devices .
4, according to the way the inverter main circuit can be divided into single-ended inverter, inverter push-pull , half-bridge and full-bridge inverter inverter .
5, according to the type of the main inverter switching devices can be divided into thyristor inverter transistor of the inverter , the  pure sine wave inverters  and the field effect insulated gate bipolar transistor (IGBT) inverter and the like. It can be attributed to \ semi -controlled \ inverters and \ full control \ inverter two categories. The former does not have a self- shutdown order , after the fall conduction components in moderation effect , so called \ semi-controlled type \ common thyristor that fall into this category ; latter, a self- shutdown order , ie no device the turn-on and turn-off can be restrained by a very modest, so called \ full-controlled \ , power insulated gate field effect transistor and right dual transistor (IGBT) etc. fall into this category .
6 , according to the DC power supply can be divided into a voltage source  DC power inverters  (VSI) and current source inverter (CSI). The former , nearly constant DC voltage , the output voltage of the alternating square wave ; latter , nearly constant DC current , the output is a square wave alternating current .
7 , according to the inverter output voltage or current waveforms can be divided into non- sine wave output inverter and sine wave output inverter.
8, according to the inverter control methods can be divided into Frequency Modulation (PFM) type inverter and pulse width modulation (PWM) inverter.
9 , according to the inverter switching circuit task methods can be divided into resonant inverter, fixed-frequency hard switching inverter and fixed- frequency soft switching inverter.
10 , according to the inverter commutation methods can be divided into load commutation inverters and self- commutation inverters.

Photovoltaic Test System

Test PV inverter system can be converted into electrical energy far an energy system. When the sun light is irradiated to the solar cell (array) to produce direct current collected by the photovoltaic inverter to convert AC power.
PV  220v inverters  to convert DC to AC only, but also the key components of photovoltaic systems, there are mainly two types of photovoltaic systems, and electricity and grid-independent. Electricity grid system provides power directly into the grid, independent power inverter directly, usually without grid conditions.

Conditions solar inverter technology

When the PV / wind hybrid system uses an 220 volt inverter  the first is to determine the inverters are several main technical parameters: input DC voltage range, such as DC24V, 48V, 110V, 220V, etc.;
Rated output voltage, such as three-phase 380V, single-phase or 220V;
The output voltage waveform, such as sine, trapezoidal or square wave.

The working principle of the inverter

A, generating a square wave
CD4069 used here constitute a square-wave signal generator. R1 is the compensation resistor circuit, the oscillation frequency to improve due to the supply voltage changes caused by instability.solar controllersoscillator circuit is completed by the charge and discharge of the capacitor C1. The oscillation frequency f = 1/2.2RC. Maximum frequency circuit is shown: fmax = 1/2.2x103x2.2x10-6 = 62.6Hz, the minimum frequency fmin = 1/2.2x4.3x103x2.2x10-6 = 48.0Hz. Because of the error components, the actual value will be slightly different. Phase other unwanted hair, the other input terminal of the circuit to avoid the impact.
Square wave generating circuit
Second, the FET drive circuit.
Since the oscillation signal voltage output square wave signal generator is the maximum amplitude of 0 ~ 5V, the full drive power switching circuit used here TR1, TR2 of the oscillation signal voltage 220 volt power inverters amplified to 0 ~ 12V. As shown in Figure
FET drive circuit
Third, the power FET switching circuit
FET is the core of the device, the introduction of the basic principles of FET Refer dz3w Station Related Articles: How it works MOS FET introduction.

220 -volt inverter brief

DC voltage two routes , one to the front stage IC power supply generates a control signal KHZ level , all the way to the pre- power tube . By a control signal to promote the high-frequency switching power tube continuously produce low-voltage transformer primary frequency alternating current ( AC although this time the voltage is low, but the 12 volt inverter is very high, the purpose is to allow the class to generate a high voltage transformer , the front stage voltage output proportional to the frequency and the level , of course, but also in power tube can withstand the frequency range ) , high-frequency alternating current through the high-frequency transformer output then after fast recovery diode full bridge rectifier outputs a high frequency of several hundred V DC to after class power management, control signal and then generates about 50HZ to control the level of work and output AC power tubeOff grid inverter by stage IC.
Of course, a complete inverter also needs some protection circuitry, such as low input voltage overload protection temperature protection and filter circuit, a high frequency filter circuit in quite important and should be easy to produce some high frequency interference and parasitic coupling , it is necessary a filter circuit to filter out the effects of these factors to increase the stability of the circuit.

3000 watt inverters

Sine wave inverter is divided into several kinds, rounded trapezoidal wave is close to sine wave is not much difference between the square and square wave to. Here we only discuss the square wave, which is currently the most commercially available high frequency 220 volt power inverters to provide the waveform.
This kind of sine wave inverter power supply can be applied to notebook computer, TV, combined sound, camera, digital camera, printer, all kinds of chargers, palm electrical brain, game machines, video machines, mobile DVD, home treatment instrument and so on, the 220v inverters output power larger also can be applied to small electric appliances such as electric hair dryer, electrothermal cup, kitchen appliances and so on.

Inverter brand market layout

Although InterSolar Chinese exhibition involving photovoltaic cells and modules, photovoltaic systems, photovoltaic element balance, 2000 watt power invertertracking and install the system whole PV industry chain, but the reporter saw in the InterSolar China exhibition site, compared with other photovoltaic equipment exhibitors exhibitors deserted, 24v inverter array containing the most growth, sun power China leader attended.

The utility of the design of vehicle inverter

We use the integrated pulse width modulation chip SG3525A as the main control chip, the CD4020B counter and a NAND gate circuit frequency phase circuit with protection circuit, the pulse width modulation inverter. The continuous output power on the 4000 watt power inverter power supply work for the 100W, and has an output over-current protection and input undervoltage protection function, can realize the power 5000 watt inverter, voltage stability, under voltage protection and over current protection function.

Innovation in the inverter

There are four types of power conversion: ① DC-DC converter, it is converted into a DC power to another DC converter energy; ② DC-AC converter, it is converted to DC power to AC power inverter This converter device called inverter, ③ AC-DC converter, it is converted to AC power to DC power converter; ④ AC-AC converter, which is a form of communication to another AC power conversion The power converter.
Does not appear before the inverter, DC-AC conversion by the DC motor is an AC generator to achieve this combination is called rotary converters. With the rapid development of power electronics technology, successfully developed a high-power switching devices and integrated control circuit, the use of semiconductor technology can complete the DC-AC conversion. Such conversion device called a static inverter, commonly referred to as an inverter refer to static inverter. stationary inverter and rotary converters compared to its excellent electrical properties, high efficiency, high reliability, light weight and small size. Recently, the development of battery materials emblem ascendant, ultra high-power DC-AC converter will replace the rotary converters.