Inverter Motor YVF250M-4 55 KW

Inverter Motor YVF250M-4 55 kW is a high-performance three-phase asynchronous motor specially designed for variable frequency drive (VFD) applications. It provides flexible speed control, stable torque output, and reliable continuous operation for industrial equipment such as pumps, fans, compressors, conveyors, machine tools, and automation systems.

Cast Iron Frame & End Shields: High-tensile grey cast iron provides high structural rigidity, minimizing operational resonance and protecting internal components from external mechanical impacts.

Precision Rotor Assembly: Dynamically balanced rotor utilizing high-grade silicon steel laminations to ensure low vibration levels, minimal eddy current losses, and smooth transition across variable speeds.

Heavy-Duty Bearing System: Fitted with high-precision, heat-resistant bearings designed to absorb radial and axial loads, equipped with re-greasing channels for simplified routine service.

Unlike standard induction motors that suffer from thermal degradation when slowed down by a VFD, the YVF250M-4 is purpose-built for inverter-driven environments:

Low-Frequency Constant Torque: Supports reliable 100% rated torque output at low operating frequencies (down to 5 Hz or lower) thanks to independent forced ventilation.

High-Frequency Constant Power: Operates efficiently beyond rated frequency (up to 100 Hz), maintaining smooth control and operational stability.

Harmonic Mitigation: Specially designed stator-rotor slot geometry and electromagnetic symmetry reduce stray load losses, noise, and vibration caused by high-order VFD harmonics.

High-Grade Copper Windings: 100% pure oxygen-free copper wire ensures maximum electrical conductivity and minimum thermal losses.

Vacuum Pressure Impregnation (VPI): Windings undergo advanced VPI treatment using high-grade, solvent-free resin to eliminate internal voids, improve dielectric strength, and prevent moisture penetration.

Reinforced Winding Corona Resistance: Incorporates corona-resistant magnet wire to protect against peak voltage impulses and sharp pulse-width modulation (PWM) wave fronts.

The YVF250M-4 55kW motor is widely deployed across heavy industries requiring precise speed and torque management:

Pumps & Fluid Handling: Municipal water supply, industrial process pumps, slurry pumps, and circulation systems (enables smooth flow regulation and energy savings).

Fans & Air Handling: Mine ventilation fans, boiler forced-draft fans, and industrial exhaust systems.

Material Handling & Conveyors: Overland belt conveyors, bucket elevators, overhead cranes, and automated logistics systems.

Industrial Machinery: Extruders, mixers, ball mills, machine tool spindles, and plastic processing equipment.

Heavy Process Industries: Auxiliary drives in metallurgy, mining, chemical processing, and cement manufacturing.

Simo Motor combines state-of-the-art manufacturing infrastructure with strict quality assurance systems:

70+ Years of Manufacturing Heritage: Decades of specialized research, design, and production in electric motor technology.

Scale & Talent: Supported by over 2,000 skilled staff members and a dedicated team of senior electrical engineers.

Full Spectrum In-House Testing: Every YVF250M-4 motor undergoes rigorous testing before dispatch, including:
• Raw material composition verification
• Stator winding resistance and high-voltage surge tests
• Dynamic balance verification at full speed range
• No-load and full-load thermal rise tests
• Noise and vibration spectrum analysis

Simo Motor operates under recognized international quality and safety frameworks, facilitating smooth customs clearance and compliance for global projects:

Understanding that diverse industrial environments present unique challenges, Simo Motor provides full tailored engineering solutions:

Electrical Adaptations: Custom voltages (400V, 415V, 440V, 660V), non-standard frequencies (60Hz), and higher insulation grades (Class H).

Mechanical & Mounting Modifications: Custom shaft dimensions (keyed, splined, or double-ended), non-standard flange specifications, and custom terminal box positions (top, left, or right side).

Environmental & Protection Upgrades: Upgraded ingress protection (IP56, IP65), anti-condensation heaters, embedded PTC thermistors or PT100 temperature sensors, and anti-corrosion marine-grade painting.

With products exported to over 60 countries across Russia, CIS, Southeast Asia, the Middle East, Europe, and the Americas, Simo Motor offers complete international lifecycle support:

Pre-Sales Engineering: Technical evaluation, motor selection verification, and drawing approvals prior to production.

Documentation Support: Complete technical dossiers, test reports, schematic diagrams, and compliance certificates provided with every shipment.

Global After-Sales Network: Spare parts consultation, remote troubleshooting, and technical guidance for installation and commissioning.

Flexible Installation: Supports horizontal (B3) and vertical (V1) mounting configurations. Ensure alignment within strict tolerance limits using laser alignment tools to prevent bearing strain.

Power & Control Wiring: Verify that the main power lines and the independent cooling fan power supply are connected separately according to the wiring diagram inside the terminal box.

Routine Inspection:
Periodically inspect and clean air intake grilles on the forced cooling fan to maintain unhindered airflow.
Monitor bearing grease intervals based on operating hours and ambient temperatures; replenish with recommended lithium-base grease.
Periodically check insulation resistance using a megohmmeter prior to restart after extended downtime.