Does the forward transformer use magnetic reset when the secondary winding has an output when the switch is turned on and off?
A forward transformer is a common DC-DC converter that can convert high voltage, low current DC power into low voltage , high current DC power supply. In the operation of the forward transformer, the turn-on and turn-off of the switch tube are necessary processes, and the secondary winding will also have an output. However, in order to ensure the reliability and stability of the forward transformer, a magnetic reset operation is also required.
Magnetic reset refers to the operation of resetting the magnetic field to its initial state at the end of each cycle. The forward transformer will continuously turn on and off the switch tube during operation. When the switch tube is turned on, energy is transferred from the input power supply to the secondary winding, and the inductor stores energy; when the switch tube is turned off, the inductance of the secondary winding stores energy. energy is released to the load. This periodic energy conversion process requires magnetic reset to ensure the stable operation of the forward transformer.
The principle of magnetic reset is to reduce the magnetic field current to zero before turning off the switch tube, and at the same time control the conduction time of the switch tube to the shortest time to prevent leakage current and energy loss. In the operation of the forward transformer, it is also necessary to control the on-time and off-time of the switching tube to control the size and quality of the output voltage.
Therefore, it can be seen that the secondary winding of the forward transformer has output when the switch is turned on and off, but a magnetic reset operation is still required to ensure the working stability and reliability of the forward transformer. .
In practical applications, the magnetic reset of the forward transformer can be achieved through the control circuit in the circuit. The control circuit can calculate the on and off time of the switch tube by measuring the voltage and current signals to achieve the magnetic reset operation. In addition, appropriate core and winding structures need to be designed to minimize leakage current and energy loss and improve the efficiency and performance of the forward transformer.
In short, the forward transformer has an output from the secondary winding when the switch is turned on and off, but it still needs a magnetic reset operation to ensure its stability and reliability. Control circuit and design of appropriate magnetic core and winding structures are the keys to achieving magnetic reset. These factors will directly affect the performance and efficiency of the forward transformer.