If the toroidal transformer does not work after being powered on, there may be several possible reasons:
1. Power supply problem: First check whether there is a problem with the power supply. Make sure that the power cord is connected properly and the voltage meets the rated voltage requirements of the transformer. At the same time, check whether there are circuit problems such as open circuit, short circuit, such as fuse melting or tripping.
2. Input side problem: Check whether there is a fault on the input side. It may be that the input voltage changes abnormally, is too high or too low, or the input power line fails and cannot provide enough current.
3. Output side problem: It is also necessary to check whether there is a fault on the output side. This may involve load problems, such as overload or short circuit causing abnormal output current. It may also be a connection problem of the output circuit, causing the output voltage to be unable to be transmitted to the load.
4. Insulation problem: If there is an insulation problem, it may cause electrical energy to escape or interference with the interference signal. Insulation breakdown may cause the transformer to stop working. Check whether the transformer insulation is damaged, such as cracks in the insulator, aging of the insulation material, etc.
5. Temperature problem: The working environment temperature of the transformer exceeds the design range, which may cause the transformer to overheat or fail to work properly. Check the ambient temperature and heat dissipation of the transformer.
6. Other faults: There may be other factors that cause the toroidal transformer to not work, such as damaged components, poor contact, welding problems, design defects, etc. After eliminating other common problems, more detailed circuit analysis and fault diagnosis may be required.