Can switching power supply transformers regenerate energy?
Switching power supply in the high-frequency ferrite transformer can only convert energy, can not regenerate energy, conversion and regeneration are fundamentally different.
Switching power supply transformer high-frequency ferrite material composition, its frequency work in the 80KHz ~ 120KHz high-frequency range, which is ordinary power transformer silicon steel sheet can not be competent. High-frequency transformer coil turns is relatively small, it's duty cycle D in 0.45. it and field effect tube together constitute asymmetric drive half-bridge transformer circuit, symmetric drive half-bridge transformer circuit, symmetric drive push-pull transformer circuit, symmetric drive full-bridge transformer circuit, flyback transformer circuit.
Thus the AC utility AC 220V, through the bridge rectifier diode circuit, and then through the filtering electrolytic capacitors, boost to DC voltage of 300V voltage composed of a variety of different drive transformer circuit combined with the gate of the field effect tube is controlled by the pulse width modulation (referred to as PWM module) chip control. At this time the switching power supply high-frequency transformer, play the role of energy transfer and conversion, no matter what the circuit, when the switching tube conduction, the transformer converts the electrical energy into magnetic field energy stored, when the switching tube cut-off is released. In the forward circuit, when the switch is on, the input voltage is supplied directly to the load and the energy is stored in the energy storage inductor, when the switch is off, and then by the energy storage inductor for the continuation of the current to the load.
High-frequency transformer in the switching power supply to play a role in the transfer, plus it can be the primary side of the AC power through which it is isolated, not directly to the secondary side of the load up.
The law of conservation of energy tells us: said energy neither out of thin air nor out of thin air, it will only be converted from one form to another form. In other words, energy energy is always circulating, but it is not regenerated. In the conversion process, its efficiency can not be 100%, like this switching power supply transformer circuit, although its efficiency is as high as 90%, then there is still 10%. In the case of this switching power transformer circuit, although it has an efficiency of 90 per cent, there is still a 10 per cent loss rate. Even so, it is a master of conversion.
