Basic Principles and Working Principles of Inverter Transformer Construction

The inverter transformer is a voltage-fed power transformer. Because of their application in small-scale power conversion, they are often referred to as electronic transformers. These inverter transformers are used when DC power is available but AC input is required for electric drive equipment. Inverters perform DC to AC conversion. In addition, transformers can be used as power transformers for step-up or step-down applications, which is why they are considered special types of actuators. Due to the possibility of power conversion and step-up and step-up, these voltage-fed transformers have become popular in a variety of industrial applications. However, to use it, one must understand the construction parameters and working principles of applying them to a suitable application.

1. Introduction to inverter transformer:

The inverter combines the concepts of an inverter transformer and a power transformer. The inverter uses a semiconductor-based switch to switch the primary voltage, thereby switching the current from direct current (DC) to alternating current (AC). According to the turns ratio, the transformer can increase or decrease the voltage from the primary winding to the secondary winding. Generally, these inverter transformers are suitable for 110 V or 220 V voltage input. Although they can be used to convert the supply voltage from DC to AC, their use in applications can also be found in medium load operation.

Since these inverter transformers are usually customized, the specific design structure is not always obvious. However, the general structure, basic components and overall working principle of the inverter transformer remain the same in all designs.

2. The structure of the inverter transformer:

The inverter assembly includes an integrated circuit, which acts as an oscillator. In some circuits, the integrated circuit is powered by energy stored in capacitors.

The metal oxide semiconductor field effect transistor (MOSFET) is integrated with the oscillator to switch the current from DC to AC without changing the frequency of the current. MOSFET is an ON/OFF type electronic transistor switch that can trigger a DC to AC switch.

In addition, MOSFETS can be connected in parallel to the center tapped transformer. The AC current is transferred from the MOSFET to the primary winding of the transformer, and the primary winding of the transformer can be further stepped up or stepped down according to the requirements of the power drive device.

Although this is a general structure, some additional components such as diodes, circuit breakers, and rectifiers can also be integrated into the inverter. If required for custom design, circuit breakers can be added to achieve instant termination. Diodes are commonly used for process indication, monitoring and control. 

3.  the working principle of the inverter transformer:

The working principle of an inverter transformer is very simple, because it combines the functions of an inverter and a transformer. The following activities occur during the working process of the inverter transformer.

The inverter gets its input from a DC power source or battery (if it is stored energy). A series of MOSFETs in the inverter assembly act as switches that convert current from DC to AC.

Since the MOSFET is usually connected in parallel with the center band, the alternating current reaches the primary winding of the transformer. The transformer has a magnetic core on which the primary and secondary windings are wound. Due to electromagnetic effects, power is transferred from the primary winding to the secondary winding. The voltage can be increased or decreased.

4.  common applications of inverter transformers:

Windmill power transmission center, electronic control panel, elevator operating system, photovoltaic grid, solar panel

Summary: The life of the inverter transformer is very long; however, the quality of the inverter transformer is also very important. Therefore, you must purchase the inverter transformer from a reliable manufacturer (such as Shenzhen KHz Technology Co., Ltd.). The company is one of the leading manufacturers of custom-designed transformers.