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In modern power electronics, the extensive deployment of Variable Frequency Drives (VFDs) and frequency inverters has revolutionized industrial control systems. However, this progress introduces a significant operational hazard: high dV/dt (rate of voltage rise) transients and common-mode noise. As a leading China Osh Series Output Filter manufacturer, we recognize that VFD fast-switching IGBT transients generate high-frequency pulses. When transmitted along long cables, these pulses create reflective wave phenomena, boosting the voltage at the motor terminals to double the DC bus voltage.
The Osh Series Output Filter is an advanced, engineered electromagnetic containment unit. Positioned between the VFD and the electric motor, it transforms steep pulse-width modulated (PWM) outputs into a smooth sinusoidal or near-sinusoidal profile. This prevents premature motor insulation failure, mitigates micro-arcing in motor bearings, and limits overall electromagnetic interference (EMI/RFI) in accordance with IEEE 519.
Reduces dV/dt rate of rise to less than 500V/µs, preventing voltage spikes from reaching motor terminals over long cable lengths (up to 1,000 meters).
Limits high-frequency currents and reduces total harmonic distortion (THD-i), lowering heat build-up within both the motor and cables.
By absorbing high-frequency common-mode noise, the Osh Series prevents EDM (Electrical Discharge Machining) and extends bearing life.
The global industrial power electronics market is transitioning toward wide-bandgap (WBG) semiconductors, such as Silicon Carbide (SiC) and Gallium Nitride (GaN) devices. These technologies enable higher switching frequencies but also generate steeper dV/dt values. To protect legacy motor installations, output filters must evolved. The Osh Series is designed to meet these challenges by using specialized magnetic materials (such as nanocrystalline or amorphous alloys) that retain high permeability across extended frequency bands.
Engineered to withstand the thermal loads of ultra-high switching frequencies (up to 20kHz and beyond), protecting motor insulation from severe dielectric stress.
As global regulations demand higher efficiency (IE3, IE4, and IE5 motor designs), the low insertion loss of Osh filters ensures minimal operational energy waste.
Global procurement teams in Europe and North America look for filters with multi-standard certifications (UL, CE, RoHS, and REACH) to streamline integration.
| Parameter | Value Range | Significance |
|---|---|---|
| Nominal Voltage | 380V - 1140V AC (Standard and customized ranges) | Supports standard low-voltage and medium-voltage industrial grids. |
| dV/dt Reduction Rate | < 500V/μs (Tested under full load) | Prevents motor insulation aging and partial discharge failure. |
| Carrier Frequency (fc) | 2 kHz to 16 kHz | Maintains thermal safety across varied inverter switching speeds. |
| Max Cable Length | Up to 1000m (unshielded) | Ensures waveform stability in remote industrial environments. |
Zhejiang Igoye Energy Technology Co., Ltd. represents the future of Chinese electrical component manufacturing. Based in Yueqing City, Zhejiang Province—the electrical engineering capital of China—our facility utilizes advanced automation and quality control protocols.
Square Meters Factory
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Advanced Equipment Units
We implement SPC (Statistical Process Control) tools in key manufacturing steps to ensure consistent quality. Our testing equipment measures magnetic saturation, thermal dynamics, and insulation reliability under high-load conditions.
With a comprehensive traceability system, we trace every component from the input materials to the final production run, guaranteeing high reliability for utility-scale deployments.
Take a virtual tour of our factory environments, where precision assembly lines and quality control zones ensure optimal performance for all electrical products.
Our solutions adapt to the harsh operating conditions of specialized industries, providing reliable electrical protection in key global sectors.
Protects pump motors from frequent tripping during startup. Features intelligent motor protection, fast-acting dual power source switches for backup energy, and automatic capacitors to improve power factor.
Designed for oilfields and refining enterprises with complex electrical loads and challenging operating environments. Delivers safe, reliable power distribution to secure high-reliability operations.
Integrates universal circuit breakers and electronic MCCBs to maintain continuous operations. Enables real-time monitoring of electrical data on mobile devices for modern production lines.
Provides RoHS-compliant distribution panels that eliminate toxic compounds (such as benzene, cadmium, and lead). Features smart universal circuit breakers and automatic transfer switches for guest safety.
Addresses strict system safety requirements. Utilizes microcomputer protection relays and advanced parameter calculations to protect operations from unexpected power quality anomalies.
Supports utility standardization with highly reliable switchgear designs. Streamlines field retrofits and upgrades while ensuring consistent equipment quality across distribution networks.
Supports utility-scale solar generation and commercial solar networks. Features high-voltage DC molded case circuit breakers (MCCBs) designed to reduce system losses and optimize solar power performance.
Mitigates severe power quality issues, such as minor voltage sags and electrostatic discharge. Keeps critical cleanroom systems and manufacturing machinery running smoothly through proactive power monitoring.
Every Osh Series Output Filter and power component from Zhejiang Igoye is designed to meet strict international standards.
Find answers to common technical and configuration questions regarding the Osh Series Output Filter.
Explore our circuit breakers, disconnectors, and automatic transfer switches designed for industrial energy distribution systems.
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