Intelligent Power-Quality Filter

PQ Tech is a power-quality specialization company founded in 2000 that supplies a wide range of technologies and control facilities in bulk for all industries that require power and energy solutions – including construction, iron and steel, broadcasting, IT, airports, hospitals, government offices, residential facilities, and others.

PQ Tech’s key product is the intelligent power-quality filter, or IPF. With today’s power transformation technologies providing maximum power efficiency for all industries, most loads used by uninterruptible power supplies, elevators, lighting, home appliances, computers and other devices are non-linear. These non-linear loads prevent a stable supply of sine-wave voltage. Harmonic frequency current significantly cuts the lifespan of transformers, cables and other electric components, and is one of the main causes of energy loss and malfunctions.

To prevent these losses, IEEE standard 519 and IEC 61000 series have created standards for electric quality. PQ Tech’s IPF was developed to control harmonic currents within these standard parameters. PQ Tech’s IPF uses a SVPWM control method with IGBT that provides optimal response characteristics for maintaining power quality. In addition, PQ Tech’s filter does not exhibit the resonance characteristics that plague manual filters, thus cutting maintenance costs and ensuring a long, stable operational lifespan. Parallel connectivity allows easy retrofitting for large systems.

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