2014年12月29日星期一

12 volt inverter Sine wave inverters

1) Power Selection 
Must be powered by batteries or car cigarette lighter. Depending on the product's optional 12V, 24V, 48V. 
UPS is providing power to the critical load from power disturbances, voltage, frequency stabilization of power supply power supply after a mains failure, UPS can continue 220 volt power inverters to provide some time to load power, to ensure the normal operation of the load used in this series UPS using high-frequency isolation transformer with an output double conversion architecture and advanced digital control technology, output stable, clean, uninterrupted with complete network management functions, generally UPS power supply has 1000w-20000w specifications. 

2014年12月27日星期六

12 volt power inverters Sine wave inverter Introduction

Sine wave inverter schematic, of the difference between output and well-wave sine wave output high efficiency inverter square wave output, but for all the electrical sine wave 1500 watt power inverter power supply design, the use is not always assured, Although you can apply to many appliances, but some appliances do not apply, or it will change indicators appliances. sine wave output of the inverter is no drawback in this regard, but there is the disadvantage of low efficiency. for this design a high efficiency sine wave inverter,

2014年12月25日星期四

12 volt inverter Modified sine wave inverter applications

Modified sine wave inverter can be used in mobile phones, laptops, televisions, camcorders, CD players, various chargers, car refrigerator, game consoles, DVD players, 220 volt power inverters power tools. Also widely used for field work such as travel or backup power, but also solve the problem of electricity shortage in remote areas. Become a supporting wind power inverters, solar photovoltaic projects, but also as the hospital's backup power, industrial and mining enterprises.

2014年12月22日星期一

12v power inverter Modified sine wave inverter Precautions

Modified sine wave inverter should avoid "inductive load." In layman's terms, that the application of electromagnetic induction principle of making high-power electrical products, AC power inverters such as motors, compressors, relays, fluorescent lights, and so on. These products need when starting a ratio to maintain normal operation (about 5-7 times) required a much larger current starting current. For example, a refrigerator power consumption during normal operation of about 150 watts, its starting power up to 1000 watts or more. In addition, due to the inductive load in an instant power or disconnect the power supply, will produce back-EMF voltage, peak voltage is much larger than this car inverter can withstand voltage, can easily cause car inverter instantaneous overload, the life impact of the inverter. 
When you use an ordinary multimeter to measure quasi-sine wave (modified sine wave) car inverter AC output voltage 20V display playful than 220 or so. 
Cause problems when running 220 volt power inverters sophisticated equipment, can also cause high-frequency interference to communications equipment.

2014年12月20日星期六

12 volt inverter Modified sine wave inverter Overview

Modified sine wave is relative to the sine wave is concerned, and now the mainstream of the inverter output waveform, is modified sine wave. The waveform of the inverter Solar power inverters main two categories, one is a sine wave inverter (ie, pure sine wave inverter), and the other is a square wave inverter. Sine wave inverter output power is the same as we use every day or even better sine wave AC power because it does not exist in the electromagnetic pollution. 
The square wave output of the inverter is the poor quality of the square wave alternating current, the positive maximum to the negative maximum value to almost simultaneously generated, so resulting in a dramatic effect on the instability of the inverter and the load itself. At the same time, its load capacity is poor, only 40-60% of the rated load, not with inductive loads. If the load carried by large, square-wave current third harmonic components contained enable capacitive currents flowing into the load increases, and in severe damage to the load of the power supply filter capacitor. 
For the above disadvantages, in recent years a modified sine wave (or modified sine wave, quasi sine wave, sine-wave, etc.) of the inverter, the output waveform from the positive maximum to a negative maximum time between intervals, using the results improved, but is still a sine wave correction by the broken line composed, still belongs to the scope of the square wave, the continuity is not good, and there is a dead 220 volt power inverters zone (waveform diagram below). Modified sine wave inverters generally use non-isolated coupling circuit, and pure sine wave inverter with isolated coupling circuit design. Its price is also a lot of difference. Modified sine wave inverter switching power supply, not only eliminates the need for bulky power frequency transformer, but also greatly improve the efficiency of the inverter efficiency of 90%. 
Modified sine wave inverter switching PWM pulse width modulation to generate modified sine wave output, the inverter process, due to the use of a dedicated intelligent circuit and power FET, greatly reducing the power consumption of the system. And an increase in soft-start function, effectively ensuring the reliability of the inverter. If electricity is not very high quality, and it is able to meet the needs of most electrical equipment, AC power inverters but it still exists 20% harmonic distortion, a problem occurs when you run precision equipment, can also cause high frequency of communications equipment interference.

2014年12月17日星期三

12v power inverter 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: AC power inverters 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 Car power inverters the active inverter DC reversible speed control system, but also for the exchange of spare lines rotor induction motor cascade control and other aspects of HVDC.

2014年12月15日星期一

12 volt power inverters Car Inverter Introduction

Car inverter is designed for the production of small electrical appliances inverter, which is currently the most advanced DC - AC conversion of the product. The 12V DC vehicle into AC power inverters a 220V AC provides commonly used, widely used in various electrical equipment, such as: mobile phones, laptops, cameras, camera, razor, air cleaners, current chargers and other electrical appliances. Is a car race, white, field work, travel, mobile office, special vehicles of essential goods, electric vehicle successfully solve problems.

2014年12月12日星期五

12 volt inverter Car inverter Precautions

* Some chargers may be due to the converter outlet; 
* This product is DC24V car special, do not use in other voltages; 
* This product is a negative ground vehicle specific, positive ground vehicles can not be used; 
* This product is not applicable core transformer for 5W traveling charger. 
* May appear to "recharge" the former Pure sine wave power inverter charging status indicator flashes red full off, the charging process becomes lit when charging. Red full off. This is a normal phenomenon. Does not affect the quality of any charge. 
* Some of the charger plug is inserted because of the direction that they can not work, this situation is to ask the conversion plug direction, then use.

2014年12月10日星期三

12v power inverter Car power converter Cautions

Properly connected in the following order: 
1, start the car engine 
2, plug in the AC powered car (the case of switching off) 
3, open the car AC power switch 
4, plug in electrical AC power inverters equipment 
5, after use, turn off the car AC power switch 
6, turn off your vehicle engine 
Avoid using vehicle power supply failed, inferior products may cause the principal burned car.

2014年12月7日星期日

12 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 efficiency of the inverter .
2 . Requires a high reliability. Currently photo power sinverter voltaic 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 vary between 10V ~ 16V, which requires a larger inverter must be within the range of the DC input voltage vehicle power inverters guaranteed to work , and to ensure that the AC output voltage stability .

2014年12月4日星期四

12 volt power inverters Touch inverter terminals, especially with wet hands, otherwise it will cause electrical shock.

(4) For the normal operation of the inverter changes in their work environment, can not change its own connection should be a professional 
Or dealer to confirm the operation. 
(5) Do not put the battery Pure sine wave power inverter into the fire, otherwise the battery will explode. And do not open or destroy batteries because batteries contain toxic to humans and harmful substances. 
(6) Minors must not use this product. 
(7) inverter operating environment should be well ventilated, temperature range -15 to 50 degrees Celsius environment, away from the fire source and the location out of direct sunlight. Not in the condensation, dust, high temperature operation in harsh environments. 
(8) Do not plug the inverter side of the blinds and do not use in the next heat source inverter (such as: electric heating, radiator, etc.) should be used in the shade. 
(9) When the machine is connected to the indoor power network, ensuring reliable inverter ground connection; diameter should meet the safety conditions of use, solar power inverter if the diameter is too small, the line will become hot, it will lead to fires; cable do may be shortened.