Convert the output voltage waveform (PWM) of the general-purpose inverter into a pure sine wave!
The "SWF type" is a sine wave filter that utilizes low-pass filter technology to convert the pulse width modulation (PWM) output voltage of an inverter into a pure sine wave. This product eliminates the threat of excessive peak voltage and protects motor windings across all cable lengths, thereby ensuring a longer lifespan for the motor. Since it produces a nearly pure sine wave, it allows for virtually unlimited motor cable lengths. Additionally, if voltage drop becomes an issue due to long motor cables, boosting via a transformer is also possible. You can view the technical documentation for this product by downloading the PDF. 【Features】 ■ Solves voltage reflection and dv/dt issues ■ Flexible adaptability ■ Provides smooth operation and long lifespan for inverter-driven motors ■ Boosting via a transformer is also possible ■ Eliminates the threat of excessive peak voltage *For more details, please refer to the PDF documentation or feel free to contact us.
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【Product Specifications】 ■ Ratings - Voltage: 400, 440, 480VAC (200-240, 600VAC are non-standard) - Phase: Three-phase - Frequency: 50/60Hz - Switching Frequency: 2kHz or more and less than 4kHz, 4kHz or more, other frequencies also supported - Inductance Error (%/phase): ±3% - Voltage Variation: 5.5% voltage drop (at full load) ■ Performance - Output Waveform: Sine wave - Voltage Distortion: Below 5% THDv (4kHz specification) ■ Environmental Characteristics - Ambient Temperature: 40℃ - Altitude: Below 1000m - Motor Distance: Optional - Ventilation: Optional ■ Certification Standards - Reactor: IEC76, IEC289 *UL approval is also available - Capacitor: UL-810 *For more details, please refer to the PDF document or feel free to contact us.
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【Purpose】 ■ When suppressing surge voltage applied to the motor terminal (input winding) ■ When the cable between the inverter and the motor is long ■ When retrofitting an existing motor with low surge withstand capability to an inverter ■ When installing a step-up/step-down transformer between the inverter and the motor *For more details, please refer to the PDF document or feel free to contact us.
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Nishitei Co., Ltd. began developing metal resistors in 1953 and has been dedicated to this field ever since. Since obtaining a patent for the V series resistor elements in 1965, we have received high praise from major heavy electrical and machinery manufacturers, and we have been adopted for many years.