Wednesday, September 24, 2014
How to Make a Simple Inverter Circuit at Home
The 60 Hz inverter shown below is about as simple to make and as inexpensive as one could desire. Yes, it is capable of providing some very useful services. Operating from an automobile battery, it can supply 50 W for the operation of such devices as an ac-dc radio, electric shaver, fluorescent lamp, small soldering iron, 40 W incandescent lamp, recorder, or portable phonograph. Its essential ingredients are a filament transformer and two general-purpose germanium power transistors.
Although this is a saturable-core oscillator, no separate feedback windings are employed. Rather, feedback is produced by cross-coupled connections in the manner of a multivibrator. At a full load, the efficiency is in the vicinity of 75 percent, and the output voltage is about 106 V.
The "mild" pi-section filter despikes the output waveform and causes a trapezoid wave, rather than the usual square wave, to be available at the output. This makes the device more suitable for the operation of radios, recorders, and other electronic equipment.
In this type of circuit, the efficiency, frequency, output voltage, and starting ability are interdependent to a marked degree. Accordingly, some experimentation with the biasing resistances may prove profitable.
It is likely, however, that only one of them, such as R1, might have to be modified. Insofar as possible, the biasing networks for the two transistors should be approximately balanced.
Otherwise, an unsymmetrical waveform, unequal transistor dissipation, and other malfunctions.can result.
Simple Inverter Circuit Diagram:
The wiring details for the above circuit may be understood with the help of the following diagram:
Although this is a saturable-core oscillator, no separate feedback windings are employed. Rather, feedback is produced by cross-coupled connections in the manner of a multivibrator. At a full load, the efficiency is in the vicinity of 75 percent, and the output voltage is about 106 V.
The "mild" pi-section filter despikes the output waveform and causes a trapezoid wave, rather than the usual square wave, to be available at the output. This makes the device more suitable for the operation of radios, recorders, and other electronic equipment.
In this type of circuit, the efficiency, frequency, output voltage, and starting ability are interdependent to a marked degree. Accordingly, some experimentation with the biasing resistances may prove profitable.
It is likely, however, that only one of them, such as R1, might have to be modified. Insofar as possible, the biasing networks for the two transistors should be approximately balanced.
Otherwise, an unsymmetrical waveform, unequal transistor dissipation, and other malfunctions.can result.
Simple Inverter Circuit Diagram:
The wiring details for the above circuit may be understood with the help of the following diagram:
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.