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Charger Can Be Divided Into Power Frequency Machine And High-frequency Machine

Shenzhen GEO Technology Co.,Ltd | Updated: Oct 30, 2017

The charger according to the design circuit frequency to divide, may divide into the power frequency machine and the high-frequency machine. The power frequency machine is the traditional analog circuit principle to design, machine internal power devices (such as Transformers, inductors, capacitors, etc.) are large, generally in the larger operating with a small noise, but the model in the harsh environment of the power grid resistance to strong performance, reliability and stability than high-frequency machine.

And the high-frequency machine is the microprocessor (CPU core chip) as the processing control center, is a complex hardware analog circuit in the microprocessor, the software program to control the operation of UPS. Therefore, the volume is greatly reduced, the weight is much lower, the manufacturing cost is low, the price is relatively low. The inverter rate of high-frequency machine is generally above 20KHZ. However, the high frequency machine can withstand poor power grids and environmental conditions, and is more suitable for the stability of the grid and less dust, temperature/humidity suitable environment.

High frequency machine and power frequency machine comparison: small size, light weight, high operating efficiency (low operating costs), low noise, suitable for office space, cost-effective (equal power, low price), small impact on the environment, the relatively high frequency charger on copiers, laser printers and motor-induced impact (SPIKE) and transient response (TRANSIENT) are susceptible, because the power frequency machine transformer separates the mains and the load, the power frequency machine provides more safe and reliable protection than the high-frequency function, and in some occasions, such as medical treatment, requires the charging machine to have the isolation device, therefore, to the industry, the medical, the transportation and so on application, The Power frequency machine is a good choice. The choice of the two should be based on the customer's different, installation environment, load conditions, etc.

All mobile phone chargers are actually composed of a stable power supply (mainly regulated power supply, supply of stable operating voltage and sufficient current) plus the necessary constant current, limit voltage, limited control circuit.

Original charger (line charge) on the output parameters: such as output 4. 4V/1A, output 5.9v/400ma ... refers to the internal voltage regulator of the relevant parameters. Understand this truth, you will know A (good) mobile phone charger is very easy to change to a good quality of the stable power supply! For example, Output 4.4V can be used for 4.5V equipment, 5.9V can be used for 6V.

Charging common Sense

Charging is an important step in using rechargeable batteries. Proper charging is good for prolonging battery life, and savage charging can have a big impact on battery life. Lithium batteries are based on the basic products are individually packaged, not universal, so each product also provides their own charging equipment, not universal, as long as the use of the instructions to follow their own use can be. So the introduction of battery charging mainly refers to Ni-CD battery and Ni-MH battery. There are two ways to charge nickel-cell batteries and NiMH batteries, which are known as "fast Charge" and "slow charge". Fast charge and slow charge is an important concept of charging, only understand the fast charge and slow charge to properly grasp the charge.

Charging method

First, fast charging and slow charging is a relative concept. Someone once asked, charger current 200mA, is not fast charge? This answer is not absolute, it should be answered for some batteries, it is fast charging, and for some batteries, it is only slow. So how do we judge the fast charge or the slow charge?

For example, the 5th Ni-MH Battery has a capacity of 1200mAH, while the other section is 1600mAH. The electricity capacity of a battery is called 1C, visible 1C is just a logical concept, the same 1C, not equal. When charging, the charging current is less than 0.1C, called trickle charging. As the name implies, it means the current is very small. In general, trickle charging can charge the battery very well without damaging battery life, but the time spent in trickle charging is too long, so it is rarely used alone, but combined with other charging methods.

The charging current is called a slow charge when between 0.1c-0.2C. Charging current is greater than 0.2C, less than 0.8C is fast charging. When the charging current is greater than 0.8C, it is called super high speed charge.

Because 1C is a logical concept and not an absolute value, it is also a relative to the fast charge of 1C translation. The 200mA charging current mentioned in the previous example is slow for 1200mAH batteries and is fast charging for 700mAH batteries.