Sine Wave Filters
2. Reduction of Bearing Currents and Failures
3. Smoother Motor Operation and Reduced Audible Noise
4. Enables the Use of Long Motor Cables
5. Reduction of Electromagnetic Interference (EMI)
6. Compatibility with Standard Motors
Sine Wave Filters
Functions
1. Reduces Overvoltage Peaks: Lowers voltage spikes from PWM, protecting motor insulation and bearings.
2. Minimizes Motor Noise: Decreases motor noise and boosts efficiency.
3. Improves PWM Output Quality: Enhances PWM output, reducing discharge currents, especially in long cable systems (up to 500m).
4. Reduces EMC Interference: Cuts radiated emissions, improving equipment EMC performance.
The products are specially designed for VFD to protect the motors. It is used at the output side of frequency converters and converted the PWM output signal of motor into a smooth sine wave form. Besides it reduces the resonance phenomenon caused by distributed capacitance and inductance of the long cable (longer than 50 meters).
Key Benefits
Advanced Magnetic Design:
Utilizing a dry-type iron core design with multiple air gaps, these sine wave filters effectively prevent magnetic saturation, achieving high linearity across the entire switching frequency range.
Total Motor Insulation Protection:
Raytech sine wave filters smooth the inverter output into a pure sine wave, providing comprehensive motor insulation protection for your motor.
Noise Reduction:
By removing high-frequency carrier components, our filters can almost completely eliminate motor "magnetic noise," making them ideal for applications in noisy working environments.
Flexible Switching Compatibility:
Optimized specifically for carrier frequencies from 3kHz to 10kHz, these filters are compatible with most modern inverter models.
Applications of Sine Wave Filters
1. Motor-Driven Systems
2. HVAC & Building Automation
3. Industrial Automation & Machinery
4. Renewable Energy Systems
5. Marine & Offshore Applications
6. Medical & Laboratory Equipment
Sine Wave Filters Technical Specifications
|
Parameter |
Specification |
|
Nominal System Voltage (Ph-Ph) |
200V ~ 480V ±10% |
|
Operating Frequency |
5 Hz to 120 Hz |
|
Switching Frequency |
3 kHz to 10 kHz |
|
Rated Load Power (P) |
1.5 kW to 315 kW |
|
Nominal Current (I) |
3.3 A to 600 A |
|
Residual Ripple Voltage THD (Full Load) |
< 5% |
|
Maximum Transient Overload |
2.0 × rated current |
|
Maximum Permanent Overload |
1.2 × rated current |
|
Design Features |
|
|
Cabinet |
On request |
|
Degree of Protection |
IP00 (others on request) |
|
Construction & Connection |
Terminals or Copper bar |
|
Ventilation |
Natural |
|
Mounting |
On the floor |
|
Installation |
Indoor standards |
|
Operating Temperature |
Ambient: -25°C to +40°C |
|
Relative Humidity |
≤ 85% (non-condensing) |
Why Choose LTEC's Sine Wave Filters?
LTEC – Powering Your Systems with Innovation!
Superior Motor Protection
Minimizes damaging PWM-induced voltage spikes (dV/dt) and high-frequency harmonics, extending motor lifespan by reducing insulation stress and bearing currents.
Enhanced System Reliability
Filters out electromagnetic interference (EMI) and radio-frequency noise (RFI), ensuring compliance with stringent EMC standards like IEC 61800-3.
Optimized Performance for Long Cable Runs
Prevents voltage reflections and overvoltage in applications with extended motor cables (>50–100 ft), a common issue in industrial setups.
Energy Efficiency & Reduced Losses
Smooths PWM waveforms to near-perfect sine waves, lowering motor heating and energy losses, which improves overall system efficiency.
Versatile Applications
Suitable for diverse sectors, including HVAC, pumps, conveyors, and renewable energy systems, due to robust design and compatibility with standard AC motors.
Compliance & Certification
Likely adheres to global certifications (e.g., CCC for China, akin to energy storage standards ), ensuring market access and safety compliance.
Customizable Solutions
May offer tailored configurations (e.g., single/dual-stage filters) to meet specific load or environmental requirements, similar to modular industrial designs.
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