Linear power supplies primarily include components such as power transformers, output rectifier filters, control circuits, and protection circuits. Linear power supplies first transform AC power through a transformer, then rectify and filter it through a rectifier circuit to obtain an unstable DC voltage. To achieve high-precision DC voltage, it is necessary to adjust the output voltage through a voltage feedback mechanism. This power supply technology is well-established, capable of achieving high stability with minimal ripple, and it does not have the interference and noise associated with switch-mode power supplies. However, its drawbacks include the need for large and bulky transformers, as well as a substantial volume and weight for the required filter capacitors. Additionally, the voltage feedback circuit operates in a linear state, resulting in a certain voltage drop across the adjustment tube, which leads to high power consumption and low conversion efficiency when delivering high output currents. As a result, large heat sinks are required. This type of power supply is not suitable for computers and other devices and will gradually be replaced by switch-mode power supplies. 400HZ power supply
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