Introduction of the Microwave Transformer - Ningbo Wanji Electronics Science & Technology Co., Ltd.

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Introduction of the Microwave Transformer

Microwave Transformer has a core with magnetic shunt, a primary winding, two secondary windings. The primary winding of the microwave transformer need add extra 220v, 50hz voltage. The secondary low voltage winding is provided for near tube filament heating. And the secondary high voltage provides current for magnetic controlling tube. That can make the tube vibrate and produce high-frequency micro energy.

Weigh your microwave transformer, and assume a power rating of approximately 100 watts per pound. Above that you need active cooling. The microwave transformer can be warm but not hot to the touch.

If your microwave transformer is the same size and you want 45 volts, you can draw 22 amps max. The voltage drops under a load, so aim for a higher open-circuit voltage.

The microwave transformer will absolutely not be short-circuit-safe after i rewound, so you should fuse the output as well as the input. A couple of auto fuses should do the trick. The core of the microwave transformer itself should be tied to mains ground (green wire).
Watch out for the killer voltage spike when you turn it off. A microwave transformer choke between the line and the primary (both hot and neutral wound on it together) and a big MOV across the primary of the microwave transformer (rated 50-100 joules) should suppress sending most of that back into the line. The spike appears on both the primary and secondary, and is very energetic given the size of the microwave transformer.

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