Low-Cost Solar Inverter Using IRFZ44N and KA3525

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Low-Cost Solar Inverter Using IRFZ44N and KA3525

This is a simple and cost-effective low-power solar inverter circuit that converts DC voltage from a solar panel or battery into AC voltage. It is based on the KA3525 PWM controller IC and IRFZ44N MOSFETs to drive a transformer efficiently.

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Components and Description:

IC KA3525:

A PWM controller IC that regulates the switching signals for MOSFETs.

Provides stable and efficient operation for DC-AC conversion.

IRFZ44N MOSFETs (4 units):

N-channel MOSFETs used as power switches to drive the transformer.

Handles high current and improves efficiency.

Resistors:

2× 1kΩ: Used for biasing and signal conditioning.

2× 82Ω: Gate resistors for MOSFETs to control switching speed.

1× 10kΩ, 1× 100kΩ, 1× 47kΩ, 1× 5.6kΩ: Used for voltage divider, feedback, and signal control.

1× 4.7Ω: Current limiting and protection.

Diodes (1N4148):

High-speed switching diodes for signal rectification and protection.

Capacitors:

50V 47µF: Filtering capacitor for voltage stabilization.

50V 4.7µF: Used for circuit stabilization.

PF102: A small capacitor for fine-tuning frequency response.

#invertercircuit
#inverter12vto220v
#inverterconnnection
#inverterkaisebanaye
#solarinverter
#solarrepair
#mpptchargecontroller
#12vto220v

Working Principle:

The KA3525 generates PWM signals that drive the IRFZ44N MOSFETs in a push-pull configuration.

These MOSFETs switch power to a step-up transformer, converting 12V DC from a solar panel or battery into a higher AC voltage.

The resistors and capacitors fine-tune the operation, while the 1N4148 diodes protect against voltage spikes.

The output AC voltage can be used for powering small AC appliances.

Applications:

Small solar power systems.

Emergency backup power.

Low-power AC loads from a solar source.

This design is affordable, uses easily available components, and is efficient for low-power applications.

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