Switching Power Supply Transformer Classification
Switching power supply transformers are power transformers that incorporate switching tubes. In addition to the voltage conversion function of an ordinary transformer in a circuit, switching power supply transformers also have the functions of insulation isolation and power transmission. Switching power transformers are generally used in switching power supplies and other occasions involving high-frequency circuits.
The role of switching power transformer
Switching power supply transformer and switching tube together constitute a self-excited (or other excitation) type of intermittent oscillator, so that the input DC voltage modulation into a high-frequency pulse voltage.
Play the role of energy transfer and conversion. In the flyback circuit, when the switch is on, the transformer converts the electrical energy into magnetic field energy stored, when the switch is off when it is released. In a flyback 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 turned off, the energy is transferred to the load by the storage inductor.
The input DC voltage is converted into the required low voltage.
Classification of switching power supply transformer
Switching power supply transformer is divided into single excitation switching power supply transformer and double excitation switching power supply transformer, two kinds of switching power supply transformer working principle and structure is not the same. The input voltage of single excitation switching power supply transformer is unipolar pulse, and it is also divided into forward and reverse excitation voltage output; while the input voltage of double excitation switching power supply transformer is bipolar pulse, generally bipolar pulse voltage output.
Characteristic parameters of switching power supply transformer
Voltage ratio: the ratio of the primary voltage to the secondary voltage of the transformer.
DC resistance: i.e. copper resistance.
Efficiency: that is, the output power / input power * 100 [%].
Insulation resistance: the transformer between the windings and the core of the insulation between the ability.
Resistance: the transformer in 1 second or 1 minute can withstand the degree of the specified voltage.
