1. Product Overview:

SP series pure sine wave inverter power supply is specially designed for power and communication systems. It is a conversion device that converts the power of the mains and batteries into uninterrupted and purified AC power. It is used to provide computers and other electrical equipment with usable continuous AC power to prepare for the instability and power failure of the mains. It can also prevent various distortions of public power, such as power supply voltage drop, surge voltage, peak voltage and broadcast frequency interference.

(II) Product Features

  ●Completely isolated inverter technology, outputting noise-free sinusoidal AC voltage

  ● The inverter unit adopts advanced SPWM technology, with pure waveform

  ● Unique dynamic current loop control technology ensures reliable operation of the inverter

  ● Strong overload capacity, able to withstand full load startup of the computer

  ● High-power bypass switch, power supply can be bypassed when overloaded

  ● With input over-voltage, under-voltage, output over-voltage, under-voltage, over-temperature, short circuit and other protection functions

  ● The inverter front panel has LCD/LED display mode, the status is clear at a glance

Working block diagram of power-specific inverter system: as shown in Figure 1

Figure 1 Block diagram of power dedicated inverter system architecture

When the inverter system works in bypass mode, the working principle of each circuit is as follows: the AC power enters and is filtered by the EMI filter to remove the noise interference sent from the AC power end, and then sent out by the static switch and filtered by the output EMI filter to remove the interference and then sent to the user load end to provide power for the user load. The output of the machine at this time is ordinary AC power.

Figure 2 Operation of each circuit when the inverter system is in bypass mode

The working principle of each circuit of the inverter system when it is working in the normal DC power supply state. When the mains fails, the DC voltage is sent to the inverter input. Driven by the main control circuit, the inverter converts the DC power into a pure sine wave with stable voltage and frequency and no interference and outputs it to the static switch. The static switch sends this high-quality power to the output EMI filter, and the EMI filter filters out interference before sending it to the user's load end, providing users with high-quality power.

Figure 3 The operation method of each circuit when the inverter system is working in the normal battery power supply state

Figure 5: Technical Parameters

Structure: Rack type 500VA-10KVA / Vertical type 1KVA-30KVA

Model definition: SP-**VA-H/220C--- Single-phase industrial frequency backup inverter

           SP－＊＊VA－H/380C－－－ Three-phase industrial frequency backup inverter

           SP－＊＊VA－Z/220C－－－ Single-phase industrial frequency online inverter

           SP－＊＊VA－Z/380C－－－ Three-phase industrial frequency online inverter