Step up transformer! How? How is a transformer boosted?

The easiest way is to buy a ready-made control transformer, dismantle the secondary stage, and remember how many turns are used for how much voltage when dismantling, so that you can calculate how many turns the 5000V voltage should be around. If there are no special requirements, it can be made in the form of an autotransformer, so that the problems of interlayer insulation and lead wires can be simplified when designing the transformer. If there is an isolation requirement, between the primary and secondary pads around 3 layers of barley paper, and then around the secondary, pay attention to the enameled wire must be densely wound neatly, do not cross, do not go around to the very edge of the transformer skeleton, so as to prevent the coil from discharging the core, wrap a layer of pad around a layer of insulating paper, and wrap the outermost layer of 3 layers of insulating paper after winding, and then pre-dry, when the transformer wire package is not cool, soak in the prepared insulating paint, the insulating paint can not be too viscous, thin and easy to soak, Dry and then assemble the core.

Pay attention to the spacing between the lead wire and the secondary and the core to prevent discharge. Finally, when it is used with electricity, it is best to put it in the transformer oil. I have successfully increased the voltage of the transformer to 15000V.

Advice: Always stay safe and don't take risks in your hobby.

It is to connect the general transformer in reverse, and you have to use low-voltage alternating current, which can only be used as an experiment, and the current generated by the transformer with higher power is larger! There are boosters on the market, but the name is inverter!

The working principle of the step-up transformer is that when there is an alternating current in the primary coil, an alternating current will be generated in the iron core (or core), so that the voltage (or current) will be induced in the secondary coil.

The transformer is composed of an iron core (or magnetic core) and a coil, the coil has more than or equal to two windings, of which the winding connected to the power supply is called the primary coil, and the other windings are called secondary coils.

Classification of transformers:

1.Classification by use: power transformer. It is mainly used in power systems, such as step-up transformers, step-down transformers, distribution transformers, contact transformers and plant transformers. Special transformers.

2.Classification according to the number of windings: divided into autotransformers, double-winding transformers, three-winding transformers and multi-winding transformers. Autotransformer: used to connect power systems with different voltages, and can also be used as ordinary step-up or step-down transformers.

The working principle of the transformer is to work with the principle of electromagnetic induction.

The transformer has two sets of coils, the primary coil and the secondary coil, the secondary coil is outside the primary coil, when the primary coil is connected to the alternating current, the transformer core produces an alternating magnetic field, the secondary coil produces an induced electromotive force, and the turn ratio of the transformer's coil is equal to the voltage ratio.

For example, the primary coil is 500 turns, the secondary coil is 250 turns, the primary is connected to 220V AC, and the secondary voltage is 110V. The transformer can step down or step up.

If the number of primary coils is less than that of the secondary coil, it is a step-up transformer, which can be used to increase the low voltage to a high voltage.

Formula: 10000

Turns per volt = --f b0 sc

Wherein: f is the working frequency, and the mains is 50 Hz;

b0 is the magnetic flux density of the core, depending on the different cores, high-quality silicon steel sheets, ordinary ones take the left and right;

sc is the cross-sectional area of the core.

1. Usually the empirical formula can be used to easily calculate the number of turns per volt per volt of a small transformer = 55 core cross-section.

For example, the core section = square centimeters, therefore, the number of turns per volt = 55 turns v2, find the number of turns of the coil.

Primary coil n1=6 turns, here take 40 turns.

The secondary coil n2=550 turns, and the number of turns of the secondary coil is calculated taking into account the voltage drop compensation factor when there is a load.

If the power is not large, it is recommended to use 555 to do pulse drive, the transformer uses ferrite, the specification EE16 can be, hehe, the experiment, you can use high-voltage enameled wire to wrap it, the rear stage uses diode and capacitance voltage doubling circuit, you can refer to the "555 Practical Encyclopedia" or electronic mosquito fly swatter circuit, there is a search on the Internet, good luck!

This magnetic rod is the step-up transformer, and the core of its circuit is also the main device for step-up.

As for whether the magnetic rod is enough or not, it depends on your output power. However, depending on your wire diameter and number of turns, it should be fine.

Then there is the winding process, which is best to be thinned in one layer, and the space for winding is about 80% of the length of the magnetic rod. Then wrap the insulating layer, in the secondary winding, the secondary in the primary winding, it is best to wrap an insulating layer at the same time after winding a layer of wire without interruption, to prevent interlayer breakdown, until the winding 1200.

Formulas and Instructions:

The number of coils in the two sets of transformers is N1 and N2 respectively, N1 is the primary and N2 is the secondary. When an AC voltage is added to the primary coil, an induced electromotive force is generated at both ends of the secondary coil. When N2N1, its induced electromotive force is higher than the voltage applied in the primary, this kind of transformer is called a step-up transformer, and the relationship between the primary and secondary voltage and the number of coils has the following relationship:

u1/u2=n1/n2

where n is called the voltage ratio (number of turns ratio).When n1, then n1 has a ratio of current i1 i2=n2 n1

Electrical power p1 = p2

Note that the above equation is only true when the ideal transformer has only one secondary coil, when there are two secondary coils: p1 = p2 + p3, u1 n1 = u2 n2 = u3 n3, the current must be found by the relation of electric power, and when there are multiple times, the analogy is derived.

Principle: The step-up transformer is a device that converts low AC voltage, high current and small impedance into high AC voltage, small current and large impedance, when there is AC current in the primary coil, AC magnetic flux is generated in the iron core (or core), so that the voltage (or current) is induced in the secondary coil.

The input of the transformer must be an alternating power supply, and its output voltage is proportional to the ratio of turns of the output input coil. If you use a battery, because it is DC, you have to add a switching circuit to the input circuit to change the voltage. In this way, alternating high voltage can be obtained at the output.

Why is it easier to step up and down the voltage of alternating current than direct current: only a changing electric field can get a changed magnetic field, and a changing magnetic field can get a changed electric field in the secondary stage of a transformer, and only a changing electric field can have an electromotive force. If you want to boost the voltage of direct current, you must first convert it into alternating current.

The composition of the step-up transformer is: the number of turns of the primary (primary) coil is small, and the number of turns of the secondary (secondary) coil is large. When transformer losses are not considered, the ratio of primary voltage to secondary voltage = the ratio of the number of turns of the primary coil to the number of turns of the secondary coil, that is:

u1/u2=n1/n2。

AC only needs a step-up transformer.

Direct current, on the other hand, requires complex circuits.

The step-up transformer consists of two sets of coils and iron cores, the side with more coils has a higher voltage, and the side with fewer coils has a low voltage.

Wrong, the most advanced technology now is to convert alternating current into direct current through voltage boosting to transmit, because DC involves rectification, and control is not as good as AC control!

The step-up transformer has the same structure as the ordinary transformer, except that the number of windings on the primary side is less than that on the secondary side!

Definition: A transformer is a common electrical device that can be used to convert an alternating voltage of one value into an alternating voltage of another value of the same frequency. A step-up transformer is a transformer used to convert a lower value alternating voltage into another higher value alternating voltage of the same frequency.

It is widely used in high-frequency fields, such as inverter power supply.

According to the formula of power and core:

S root number P root number 2000 54 (c).

The selected core cross-section of 40C is too small to accommodate the winding. Calculation steps according to the core section 54c:

The permeability of the iron core is 10,000 gauss, let the tung be changed, and the number of turns per volt is tan

n 45 s 45 54 turns).

Turns of primary 12v:

12 turns) the number of turns at the secondary 800V (the influence of transformer iron loss and copper loss, the margin must be increased by 5%)

800 turns).

Primary and secondary currents:

i1＝p/u＝2000/12≈167(a)i1＝2000/800＝

Primary and secondary wire diameters:

d root number i δ

The current density is per square and is calculated).

d1 root number 167

d2 root number.