What is a charger?

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What is a charger?

发布时间:1/5/2019

Charger (charger) can be divided into power frequency machine and high frequency machine according to the working frequency of the designed circuit. Power frequency machine is designed based on the traditional analog circuit principle. The internal power components of the machine (such as transformer, inductance, capacitor, etc.) are large, generally there is less noise when the load is large, but the model has strong resistance performance, reliability and stability in harsh grid environment conditions It is better than high frequency machine

The high-frequency machine takes the microprocessor (CPU chip) as the processing and control center, which burns the complicated hardware analog circuit into the microprocessor, and controls the ups operation in the way of software program. Therefore, the volume is greatly reduced, the weight is greatly reduced, the manufacturing cost is low, and the price is relatively low. The inverter frequency of the high-frequency machine is generally above 20kHz. However, the high-frequency machine can withstand the severe power grid and environmental conditions It is suitable for the environment with stable power grid, less dust and suitable temperature / humidity

Compared with the power frequency machine, the high frequency machine is small in size, light in weight, high in operation efficiency (low in operation cost) and low in noise, which is suitable for the office, high in cost performance (low in price under the same power), and has little impact on space and environment. In contrast, the impact (spike) and transient response (transmission) caused by the high frequency charger on the copier, laser printer and motor are easy to be affected because of the voltage transformation of the power frequency machine The device isolates the mains power from the load, which provides more safe and reliable protection for the power frequency machine than the high frequency machine under the harsh environment of the mains power. In some occasions, such as medical treatment, the charger is required to have an isolation device. Therefore, the power frequency machine is a better choice for the application of industry, medical treatment, transportation, etc. the choice of the two should be considered according to the different conditions of customers, installation environment, load conditions, etc

The features of power frequency machine are simple, and the existing problems are as follows:

1) Large size of input and output transformer;

2) The size of the output filter used to eliminate high order harmonics is large;

3) Transformer and inductor produce audio noise;

4) The dynamic response performance to the load and power supply changes is poor

5) low efficiency;

6) Input without power factor correction, the grid pollution is more serious;

7) High cost, especially for small capacity model, can not be compared with high frequency machine

Product introduction

The charging characteristic curve of (charger) charger is optimized by microcomputer control technology, and the charging current follows the charging

Charger

With the increase of charging voltage, the battery will automatically decrease; with the pulse charging mode at the end of charging, the charging effect is more ideal. The principle of capacity balance is used to judge the adequacy of the battery intelligently, so as to ensure that the battery is sufficient, i.e. it is neither under charged nor overcharged.

·The principle of capacity balance is used to judge the adequacy of battery intelligently;

·Under the premise of sufficient battery power, it can reduce the internal temperature and gas evolution of the battery in the charging process to the maximum extent, and effectively extend the cycle service life of the battery;

·High brightness LED indicates the operation state of charger;

·Display battery voltage, power supply voltage, charging current, capacity, time and other parameter information, fault code displays fault content;

·It has open circuit, reverse connection fault protection and alarm functions;

·With overload, short circuit fault protection and alarm functions;

·It has the functions of transformer over temperature, module over temperature and other fault protection and alarm;

·It has automatic detection, delay start and soft start functions;

·It has the function of manual or automatic equalizing charging to ensure the consistency of the single capacity of the battery;

·Fully automatic initial charging function;

·With desulfurization charging function;

·Unplug the charging plug in the middle of charging and the charger will shut down automatically.

Normal working conditions

(1) Altitude not more than 2000 meters;

(2) The surrounding medium temperature shall not be higher than + 40 ℃ and not lower than - 10 ℃;

(3) The relative humidity of air shall not be greater than 85% (when the medium temperature is 20 ℃ ± 5 ℃);

(4) No conductive dust;

(5) Environment without explosion hazard;

(6) Environment free of gases and vapors that can corrode metals and insulation;

(7) Where there is no rain or snow;

(8) Where the vertical plane is not inclined more than 5 degrees and there is no violent vibration and impact

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