Audio transformer is a transformer that works in the audio range, also known as a low-frequency transformer. The operating frequency range is generally from 10 to 20000 Hz. It is often used to change the voltage or change the impedance of the load.
Used as components of voltage amplification, power output and other circuits in radio communications, broadcasting and television, and automatic control. The audio transformer has a uniform frequency response in the working frequency band, and its core is made of high-permeability materials. The primary and secondary windings are tightly coupled, so that almost all the magnetic flux passing through the primary winding is linked with the secondary winding, and the coupling coefficient is close to
1. The lowest frequency of the passband is determined by the inductance of the original winding, and the highest frequency is determined by the leakage inductance of the transformer. To ensure that the transformer has enough pass band, the original winding inductance should be large, and the leakage inductance should be small. The core's hysteresis loss and magnetic circuit saturation will cause signal distortion. Appropriate configuration of the load and increase the load current can reduce the effect of hysteresis loss; increase the core section and leave an air gap to prevent the magnetic circuit from being saturated, which can reduce signal distortion.
The wiring method of the audio transformer is actually not difficult. Generally, there will be a label on the front of the audio transformer. Just follow the wiring marked on the label. If it is difficult to distinguish the lead color when the audio transformer is connected, you can also directly contact the manufacturer. Communicate well before wiring.
In audio equipment, audio transformers play a very important role in regulation. Audio transformers can convert voltage and current like power transformers, and can also couple audio signals. Unstable audio transformers have a great impact on sound quality. of.
The main reasons that the audio transformer affects the sound quality are as follows:
(1) The influence of the quality of the iron core.
To wind a better performance audio transformer, you must try to reduce the leakage inductance of the transformer, so you should try to choose a high-silicon steel core with a larger magnetic flux density.
(2) The influence of the winding process of the primary winding and the secondary winding.
Audio transformers often encounter current noises or "humming" noises during operation, and the high-performance audio transformer windings evenly and tightly wrap the toroidal core, effectively reducing the "humming" sound caused by magnetostriction. And can be overloaded instantaneously, and can accept the impact of large current caused by bass.
(3) The influence of winding material.
High-quality audio transformers have excellent dynamics, while low-quality audio transformers have the opposite effect. At present, many low-quality audio transformers on the market are made of aluminum wire or copper-clad aluminum wire. The sound quality of pure copper wire and aluminum wire is very different.
Shengyuan audio transformer adopts toroidal transformer manufacturing technology, adopts high-flux iron core, and is wound with pure copper wire. It has high efficiency, low temperature rise, no magnetic leakage, no interference, and high requirements for sound quality and vibration. It can be used for electrostatic shielding and epoxy resin filling. From the selection of high-quality materials and superior and innovative technology, it reduces the magnetic leakage interference and mechanical noise of the audio transformer.