Circuit of superior power discharge source

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The circuit of the superior power discharge source is shown in the figure. It has the characteristics of small size, large power and high efficiency.

How it works: AC power input is filtered by T1 and divided into two outputs, one goes to step-down transformer T3, and two-way thyristor KS is connected in the primary circuit of T3 to change the primary AC power of transformer T3. The other circuit rectifies after the voltage is lowered by the capacitor C1, and supplies the DC working voltage to the trigger control circuit after the VD1 voltage is stabilized. R3, C3, VQ3 and transformer T2 form a relaxation oscillator circuit. R2, R4 and VQ1, VQ2 constitute a current source to charge the capacitor C3 at a constant current. When the voltage at both ends of C3 is charged to the VQ3 breakdown voltage, C3 discharges through the emitter of VQ3, the base and the primary coil of transformer T2. The trigger pulse of thyristor KS is obtained at the secondary level of transformer T2, which controls the thyristor KS conduction and makes transformer T3 work. In the secondary level of transformer T3, the positive and negative symmetrical DC voltage required by the power amplifier is obtained after rectification and filtering. When the voltage at both ends of capacitor C3 is discharged to the valley voltage of VQ3, the emitter and base of VQ3 are closed, and the next cycle of capacitor C3 is prepared for charging and discharging. R6-R9, VQ4, VD2, W1 and other components of the voltage comparison amplifier circuit, adjusting W1 can change the output voltage, and through IC1 to control the current of VQ1, VQ2 current sources to change the charging and discharging time of C3, control the conduction angle of thyristor VKS, thus changing the primary AC power of transformer T3, obtaining a constant output voltage at the secondary level, and ensuring the instantaneous power of power amplifier.

Component selection: 5mm for transformer T2 × 5 mm E-core self-made, sound for beginners Φ The 0.15mm lacquered wire coils 200 turns and the secondary coils 135. Transformer T3 is 40mm usable × 60mm core winding, primary use Φ 0.9mm enameled wire wrapped 352 times, secondary sound Φ 1.26mm lacquered wire wraps around 176 rings and taps at 88 rings. Other components are shown in the diagram.