An inverter is a device composed of inverter device and component, which is directly different from a transformer. In other words, the inverter can realize DC input and then output AC. The working principle is similar to that of a switching power supply, but the oscillation frequency is within a certain range. For example, if the frequency is 50Hz, the output will be AC 50Hz. An inverter is a device that its frequency can be changed. UPS (Uninterruptible Power System/Uninterruptible Power Supply) is system equipment that connects batteries (mostly lead-acid maintenance-free batteries) with the host, and converts DC power into mains power through module circuits such as the host inverter. It provides uninterrupted power, and is mainly used to some equipment that requires high power supply stability.
Difference between Sine Wave Inverter and UPS Power Supply
- The sine wave inverter can convert DC (direct current) to AC (alternating current), and UPS power has 3 modes: bypass mode, mains mode, and battery mode.
- Generally speaking, sine wave inverter is just a pure invert device, without any filtering impurities functions.
- In bypass mode of the UPS power supply, it will directly pass the mains power without passing UPS power supply host. In the mains mode, the mains power the impurities of the mains power will be filtered via the machine's rectifier, and then outputs to the equipment to supply power via the inverter. In battery mode, it will output to the device through the direct current (battery power) via the inverter.
- The sine wave inverter and the UPS power supply system are roughly have the same function and principle, and both of them can achieve the following 2 functions:
(1) Provide a way to adjust voltage changes, eliminate various electrical interferences, and provide high-quality power supply.
(2) In case of AC mains failure, sine wave inverter and UPS can provide necessary backup power supply. The biggest difference between the two is that the UPS needs to be equipped with a battery pack with a short backup time. While the sine wave inverter does not need to be equipped with a battery. It can directly use the various voltage DC screens in the communication room. With large capacity, it can guarantee network is running uninterrupted for a long time.
Difference between Sine Wave Inverter and Normal Inverter
- Pure sine wave inverter is suitable for any inductive load and resistive load. Inductive loads include various equipment with AC motors (refrigerators, washing machines, etc.). Square wave and modified wave inverters are suitable for resistive loads such as lights, televisions, and electric heaters.
- Pure sine wave inverters have strict requirements on functions and specifications, and are relatively expensive. Generally, inverter is a hybrid waveform of sine wave, square wave, clutter, which can be used for general electrical appliances and with lower price.
- The main difference between a pure sine wave inverter and a normal inverter is that the output voltage waveform is different. The pure sine wave inverter is suitable for all appliances, while the normal inverter is suitable for pure resistance appliances such as electric furnaces.