Description

ATO 1 phase 70VA toroidal transformer, a single primary winding tapped at 220VAC 50/60Hz and 30-0-35 volt dual secondary windings, 12V output is available, it has been widely used in household appliances and other electronic equipment with high technical requirements.

Advantages of ATO Toroidal Transformer

High Efficiency: Winding matches the core perfectly, which makes the transformer more efficient.
Long Service Life: With high-quality materials and manufacturing technology, the transformer can be used for 30 years.
Less Noise: The core is seamlessly rolled and the winding is set evenly over it, which makes the transformer quiet when it is working.
Less Radiation: Toroidal structure and winding technology reduce electromagnetic radiation.
Low Temperature Rise: Even if it is overloaded at 120%, the temperature rise will be less than 70℃.

70VA Toroidal Transformer Specifications

Model	ATO-T-C70VA
Phase	Single phase
Power	70VA (70W)
Primary Voltage	110V AC (Optional: 110V, 120V, 220V, 230V, 240V)
Secondary Voltage	12V AC (Optional: 12V, 24V, 48V, 110V, 220V, 2x6V, 2x12V, 2x15V, 2x24V, 2x30V, 2x35V, 2x40V, 2x50V, can be customized)
Secondary Current	5.83A
No. of Inputs	1 input
No. of Outputs	1 output (4-wire 2 outputs are available) *Note:* For the transformer with 2 outputs 4-wire, each output provides the same voltage and current level, the sum of 2 output power capacities is equal to the total capacity.
Frequency	50Hz/60Hz
Winding Material	Copper Wire
Coil Structure	Toroidal
Efficiency	90%-96%
No-load Loss	<1.26W
Input Wire	UL1015-18#Red
Output Wire	UL1015-16#Blue
Voltage Strength	DC2500V
Insulation Impedance	≥500MΩ
Cooling Method	Natural air cooling
Temperature	+40℃
Certification	CE, RoHS, ISO
Warranty	12 months
External Diameter	100mm
Height	45mm
Pedestal	100*100mm
Mounting Hole Distance	90*90mm
Weight	1.2kg
Package Included	1Toroidal transformer + 1Accesorries sets (Nut, Shim, Metal disk, Rubber gasket, Pedestal, Screw)

Toroidal Transformer Accessories

Toroidal Transformer Mounting Methods

Toroidal Transformer Internal Structure

Tips: Working Principle of toroidal transformer

When U1, a sinusoidal alternating voltage, is added to both ends of the primary coil, there is alternating current I1 in the conductor, and alternating flux ф1 is generated, which passes through the primary coil and the secondary coil along the core to form a closed magnetic circuit. In the secondary coil, mutual inductance potential U2 is induced, and a self-inductance potential E1 is also induced by ф1 in the primary coil, which has the opposite direction and similar amplitude to that of the applied voltage U1, thereby limiting the size of I1. In order to maintain the existence of flux ф1, a certain amount of power consumption is necessary, and the transformer itself also has a certain loss. At this time, although the secondary coil is not connected to load, there is still a certain current in the primary coil, which is called “no-load current”.

If the secondary coil is connected with load, the current I2 is generated in the secondary coil, and the flux ф2 is generated consequently, which is opposite to flux ф1 in the direction, playing a counteracting role, so that the total magnetic flux in the core is reduced, thus reducing the primary self-inductance voltage E1. As a result, the current I1 increases, which shows that the primary current is closely related to the secondary load. When the secondary load current increases, I1 and ф1 increase, and the increase of ф1 supplements the flux counteracted by flux ф2 to maintain the total flux in the core unchanged. If the loss of the transformer is not taken into account, it can be considered that the power consumed by the secondary load of an ideal transformer is the power obtained from the power supply initially.