● Active filter itself is a harmonic source. It relies on the power electronic device to detect the harmonics of the system and generate a set of harmonic vectors with equal amplitude and opposite phase of the system, so that the system harmonics can be offset and become a sinusoidal waveform. Active filter can not only filter out harmonics, but also dynamically compensate reactive power. Its advantage is that it reflects the action quickly, filters the harmonics up to 95%, and compensates the reactive power carefully. The disadvantage is high price and small capacity.

General passive filtering refers to the matching of inductance and capacitance to a harmonic parallel low resistance (tuned filter) state, to a harmonic current to form a low resistance state path. So that harmonic current doesn't flow into the system. The advantages of passive filtering are stable operation, relatively mature technology and large capacity. The disadvantage is that the harmonic filtering rate is generally only 80%, and the reactive power compensation for the fundamental wave is also certain.

At present, active and passive hybrid type is generally used in places where the capacity is large and the compensation is required to be detailed, that is, passive for large-capacity filter compensation and active for fine tuning. Compared with passive filter, active power filter has high controllability and fast response, not only can compensate each harmonic, but also can suppress flash, compensate reactive power, has the characteristics of one machine multi-energy.

The chip using UAF42AU has precise frequency and Q value.

Strong versatility, the module integrates low-pass, high-pass, band-pass and other functions. Internal integrated amplifier for better amplification effect.

Beautiful design, a variety of interfaces at a glance.

Easy to use, just adjust the slide to adjust the center frequency (0~50KHz)

[Name]: UAF42 filter

[Size]: 50mm X 50mm

[With chip]:UAF42AU

[Supply voltage range]:≤18V

Versatility: low pass, high pass, band pass, band resistance

The design process is simple and easy

Precise frequency and Q

Includes a 1000pF on-chip ±0.5% capacitor

Test equipment/Communication equipment/Medical device/Data acquisition system/monolithic replacement method UAF41