24V Dc to 220 V Ac Inverter @ 65 Khz Using IC TL494 30Watt
24V Dc to 220 V Ac Inverter @ 65 Khz Using IC TL494 30Watt: In this design Im designing and testing an inverter 24V dc to 220 V ac inverter @ 65 khz. The control circuit is based on IC
The working principle involves switching MOSFETs to create an alternating magnetic flux in a transformer, producing AC voltage. The TL494 IC, with its internal 5V reference regulator, controls the PWM for switching. The article advises against building such inverters for commercial use due to safety and performance concerns.
Now before building the circuit based upon the TL494 PWM controller, let's learn how the PWM controller TL494 works. The TL494 IC has 8 functional blocks, which are shown and described below. The 5V internal reference regulator output is the REF pin, which is pin-14 of the IC.
The resistors, capacitors, and diodes around the TL494 set the operating frequency and duty cycle. Resistors R6 and R7 (1K each) help limit current to the base of the transistors, while diodes D8 and D9 (1N4148) protect against back EMF.
The TL494 IC has 8 functional blocks, which are shown and described below. The 5V internal reference regulator output is the REF pin, which is pin-14 of the IC. The reference regulator is there to provide a stable supply for internal circuitry like the pulse-steering flip-flop, oscillator, dead-time control comparator, and PWM comparator.
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