BK 220V Single Phase Transformer

The BK 220V single phase transformer is a classic and widely-used isolation-type control transformer. It is specially designed for various industrial, commercial and laboratory scenarios, suitable for low-voltage control circuits, power supply for precision equipment, and safety lighting systems, etc. The core function is to provide safe, stable and pure single-phase AC power for these scenarios.

This product is made with high-quality cold-rolled silicon steel sheets and pure copper windings, which are solidified and formed through a vacuum impregnation process. This structural design enables it to perform exceptionally well in actual operation:

Low loss, low temperature rise, strong insulation performance, and the ability to completely achieve electrical isolation between the input and output terminals. It can effectively filter out various interferences in the power grid, providing pure and stable 220V single phase power for PLC control systems, precision instruments, lighting equipment, and other small electrical devices.

Introduction to the Principle

The BK220V single phase transformer can change both the magnitude of the alternating voltage and the magnitude of the alternating current.

(1) The "transforming" function of the transformer can either increase or decrease the alternating voltage. Ignoring the loss of electrical energy, the relationship between the primary voltage U1, secondary voltage U2, the number of turns in the primary winding N1, and the number of turns in the secondary winding N2 is as follows: 

U1/U2=N1/N2=n

It is called the turns ratio or voltage ratio. From the above equation, we can see:

① When the number of turns of the secondary winding N2 is greater than that of the primary winding N1, the secondary voltage U2 will be higher than the primary voltage U1. That is, when n = N1/N2 < 1, the transformer can increase the alternating voltage, so a transformer with a voltage ratio of n < 1 is called a step-up transformer.

② When the number of turns of the secondary winding N2 is less than that of the primary winding N1, the transformer can reduce the alternating voltage. Therefore, when n > 1, the transformer is called a step-down transformer.

③ When the number of turns of the secondary winding N2 is equal to that of the primary winding N1, the transformer does not change the magnitude of the alternating voltage, that is, the primary voltage U1 is equal to the secondary voltage U2. Although this type of transformer cannot change the voltage magnitude, it can electrically isolate the primary and secondary circuits, so a transformer with n = 1 is commonly used as an isolation transformer.

(2) "Current Transformation" Function

A transformer not only can change the magnitude of the alternating voltage, but also can change the magnitude of the alternating current. Since the transformer has very little energy loss and can be ignored, the input power P1 and the output power P2 of the transformer are equal, that is: P1=P2

U1-11=U2-12

U1/U2=12/11

From the above equation, it can be seen that the primary and secondary voltages of the transformer are inversely proportional to the primary and secondary currents. If the secondary voltage is increased, the secondary current will decrease, and if the secondary voltage is reduced, the secondary current will increase. In summary, for a transformer, the more turns in the coil, the higher the voltage at both ends, and the smaller the current flowing through it. For example, on a certain power transformer, it is marked that "input voltage 220V, output voltage 6V". Then the ratio of the number of turns of the primary and secondary windings of this transformer is n = 220/6 = 110/3 = 37. When this transformer is connected to the circuit, the current flowing out of the secondary winding is 37 times that flowing into the primary winding.

Detailed Parameters

Price Advantage

The advantage of the BK220V single-phase transformer is, in simple terms, that it has found the most practical "middle ground" between standard products and customized ones.

Our Yibaling factory started by manufacturing standard transformer models. Therefore, we purchase large quantities of silicon steel sheets and copper wires in batches, and purchase these materials in bulk.

As a result, the cost can be controlled. At the same time, we are familiar with the production line of the standard model, and our workers are highly efficient, which gives our standard model a natural price advantage.

However, the standard model BK220V single-phase transformer is not suitable for all environments. Many factory sites have special conditions - perhaps the space in the cabinet is just a little bit limited, or an uncommon output voltage is required. Our Yibaling factory will not ask you to pay a high development fee for a completely new design from scratch.

Our engineers work on the mature platform of the existing, verified the transformer to make adjustments: such as fine-tuning the power within the existing specifications, changing the direction of the connection terminal, or adjusting the shell according to the size of your cabinet.

The core materials like silicon steel sheets and vacuum impregnation are not changed, so it can solve your actual problems without being outrageously expensive, and the delivery is also fast.

Meanwhile, compared to the market: compared to those cheap and unverified brand-name products, we use industrial-grade genuine materials, undergo full inspection upon leaving the factory, aiming for long-term stability and durability; compared to those international brands, we have no brand premium and complex import procedures, the price is reasonable, and the response is fast; compared to completely new custom designs that require mold-making, our Yibaling "fine-tuning" solution can help you save a significant one-time engineering fee and long waiting time.

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