Double 24V toroidal transformer in series to get 48V voltage wiring method:
A, the two transformers of the 24V secondary series connection to get the three bus header, is the double 24V. The connected is the 0V line that is the ground line. The other two headers are dual 24V voltage lines.
Second, the two primary parallel connection to the two bus head, which is the total 220V.
Third, turn on the 220V, measure the double 24V these two wire, should get the voltage of 48V. if the voltage 0V, as long as the secondary of any one transformer to switch the two wires on the line, or to change the primary of any one transformer will also work.
The working principle of toroidal transformer:
First of all, the principle of transformer and the principle of toroidal transformer is essentially the same.
Secondly, the core of the toroidal transformer is made of high-quality cold-rolled silicon steel sheet (sheet thickness is generally 0.35mm or less), seamlessly rolled, which makes its core performance superior to that of the traditional stacked-sheet core.
The toroidal transformer's coils are evenly wound around the core, and the direction of the magnetic lines of force generated by the coils coincides almost exactly with the magnetic circuit of the core, so that the excitation energy and core loss will be reduced by 25% compared with that of the laminated type.
The following series of advantages:
1) high electric efficiency, no air gap core, stacking coefficient can be as high as 95% or more, the core permeability can be taken 1.5 ~ 1.8T (laminated core can only be
taken 1.2 ~ 1.4T), the electric efficiency of 95% or more, the no-load current is only 10% of the laminated type.
2) small external dimensions, light weight toroidal transformer than stacked transformer weight can be reduced by half, as long as the cross-sectional area of the core is maintained
Equivalent, toroidal transformer is easy to change the length of the core, width, height ratio, can be designed to meet the requirements of the external dimensions.
3) less magnetic interference toroidal transformer core has no air gap, the windings are uniformly wound in the ring on the core, this structure leads to magnetic leakage
small, electromagnetic radiation is also small, without the need for additional shielding can be used in high sensitivity electronic equipment, such as in low-level amplifiers and
medical equipment.
4) vibration noise is smaller core without air gap can reduce the core.