About this page — a recovered blog post from the Su-Kam era, originally published on blog.su-kam.com during Kunwer Sachdev's tenure as Founder & MD. The original blog was lost after Su-Kam's insolvency; this page is reconstructed from the Internet Archive and preserved as a historical record.
How a Sine Wave is Better Than Square Wave and Modified Sine Wave
Every inverter outputs one of three waveforms — square, modified sine, or pure sine — and the difference decides how safely your appliances run. Su-Kam broke it down.
A square wave is the crudest and cheapest: it runs basic loads but makes motors and electronics hum, heat up and wear out. A modified sine wave is a stepped approximation — better, but still rough on sensitive gear. A pure sine wave matches the smooth output of the grid itself, so TVs, fridges, computers and medical devices run cool, quiet and safe.
Su-Kam built India's first pure sine wave inverter, bringing MOSFET and DSP technology to everyday units — so this comparison wasn't theory, it was the company's founding engineering advantage.
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