Transformer Power Supply Design

Power supply without transformer.

Transformer power supply design.

Most times these transformers are not available off the shelf in the exact same parameter that suits our design. For small loads it is possible to lower the voltage from 230 vac to a few volts 5 12 or 24 for example using only a current limiting resistor as you can see in the wiring diagram in figure 1 its efficiency is extremely low 1 because the energy is lost in heat on resistor r1. We will analyze several hardware and simulation aspects. The transformer secondary rated current should be 1 8 times the dc current of the power supply.

Designing an efficient power supply circuit is not less of a challenge. Power supply design notes. Transformer less power supply july 25 2020 editorial staff. It is not magic or a dream.

Example design choosing components specification. It must power a 12v dc motor which runs for long periods of time and in normal use draws a maximum of 2a from the supply. The transformer secondary voltage should be approximately 8 times the dc voltage of the unregulated power supply. This is another article of series about the design of power supply.

Design and build a psu to run from 240v ac mains. A dual complementary rectifier is used to supply a positive and negative dc output of the same voltage. Those who have already worked with smps circuits would easily agree that the flyback transformer design plays a vital role in designing an efficient power supply circuit.