The charger (charger) is divided according to the working frequency of the designed circuit, which can be divided into power frequency machine and high frequency machine. The industrial frequency machine is designed based on the traditional analog circuit principle. The internal electrical components (such as transformers, inductors, capacitors, etc.) of the machine are relatively large. Generally, there will be less noise when the load is large. The resistance performance is stronger in the environmental conditions of the power grid, and the reliability and stability are stronger than that of the high-frequency machine.
The high-frequency machine uses a microprocessor (CPU chip) as the processing control center, which burns complicated hardware analog circuits into the microprocessor, and controls the operation of the UPS in the form of software programs. 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 high frequency machine is generally above 20KHZ. However, the high frequency machine has poor tolerance under harsh power grid and environmental conditions, and is more suitable for environments where the power grid is relatively stable, with less dust, and suitable temperature/humidity.
Comparison of high-frequency machine and industrial frequency machine: small size, light weight, high operating efficiency (low operating cost), low noise, suitable for office places, high cost performance (at the same power, low price), and impact on space and environment Relatively speaking, the impact (SPIKE) and transient response (TRANSIENT) caused by high-frequency chargers on copiers, laser printers and motors are easily affected. Because the transformer of the industrial frequency machine isolates the mains from the load, it is In harsh environments, power frequency machines can provide safer and more reliable protection than high frequency machines. In some occasions, such as medical treatment, the charger is required to have isolation devices. Therefore, for industrial, medical, and transportation applications, power frequency machines are A better choice. The choice of the two should be considered according to the different conditions of the customer, the installation environment, and the load situation.
