Why can not you use resistors and chokes to lower the voltage?
Why is it unacceptable to use resistors, chokes, etc. in order to lower the voltage at the power receiver?
Who said what is unacceptable? Can. But:
- In this case, galvanic isolation of the device that is powered by a low voltage from the network is not provided. This means that if a choke, resistor, or quenching capacitor breaks, then the full mains voltage will go to the device.
- Also, when the power receiver is disconnected from the resistor, inductor or capacitor, that is, when they are without load, the output of such a “step-down power source” will also be the total network voltage.
- The listed methods do not lower the voltage, but limit the current, as a result, the voltage at the load decreases. But this is not at all like a reduced voltage on the secondary winding of a transformer.
That is, it is unsafe for both the user and the power receiver itself. When powered by a step-down transformer, there is no danger of electric shock.
Please clarify in what context (for what purpose) and what are you going to nourish in this way? If you carry 12-36 volts, then the whole point of using extra-low voltage is lost.
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