355kW HV Brushless AC Induction Motor

AIMIN ELECTRICS CO., LTD. is one of the leading manufacturers and suppliers of 355kw hv brushless ac induction motor in China. With abundant experience, we are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk premium products made in China here and get quotation from our factory.

Brief Introduction

Engineered for heavy industrial applications, the YR-400-6 brushless AC induction motor integrates advanced shaft repair resilience to address critical failures. Its robust design employs oxyacetylene thermal spraying (Ni222 alloy, 150–250 mesh) for precision shaft restoration without disassembly, ensuring dimensional stability under 0.01mm tolerance. The motor features in-situ grinding capability (4 rpm rotational control, 0.05–0.1mm depth) for on-site journal refurbishment, eliminating rotor extraction. Anti-deflection protocols include percussion straightening verification and dynamic balancing to mitigate vibration-induced wear. Contamination-resistant seals and Class F corona-suppression insulation enhance longevity in harsh environments. Maintenance protocols leverage non-destructive testing for early crack detection, solidifying the motor as a high-reliability solution for power-intensive operations.

The YR-400-6 brushless AC induction motor integrates advanced shaft integrity protocols to eliminate field repair scenarios. Its rotor shaft undergoes precision forging and thermal stress relief, maintaining concentricity ≤0.02mm and ellipticity ≤0.01mm per OEM tolerances. This motor employs hardened journals (surface hardness HRC 50+) via proprietary quenching, preventing wear-induced ovality common in high-inertia applications. Critical design features include:
- Optimized bearing spans reducing deflection under load
- Stress-relieved core slots mitigating post-weld distortion
- Non-removable rotor compatibility for in-situ journal refinishing

For severe damage scenarios, the shaft accommodates oxy-acetylene spray restoration (N1222 alloy, ≤0.2mm bonding layer) without disassembly. Maintenance protocols leverage peening alignment for minor bends (≤0.5mm/1000mm) using radial force distribution across 120° arcs. Post-repair validation includes 120°C/12h thermal cycling to confirm dimensional stability. The brushless AC induction motor further supports on-site grinding (4 rpm rotational feed, 40m/min grit velocity) via integrated mounting points for portable lathes-bypassing traditional rotor extraction. Rigorous dynamic balancing (G2.5) ensures vibration compliance post-intervention, extending service life in mining and heavy compressor drives where shaft failures historically caused extended downtime.

Main Technical Parameters

Production Details

Frame

• Compact and robust iron casting frame

• Universal IEC and NEMA installation dimensions available

• Customizable outlook and dimensions

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Stator

• 99.9% pure copper winding for stator to ensure the output power and efficiency

• Excellent insulation system with 5 more processing flows

• All the windings are fitted in by handwork to ensure all slots are full and avoid any winding flaw.

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Rotor

• Aluminum casting rotor with high quality silicon steel rotor core to assure induction efficiency

• Well and precisely machined shafts with good capacity of strength and toughness

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Testing

• All motors must pass the piece testing before painting and packaging

• Type tests will be regularly performed for each series, more often for new developed series and variants.

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Applications

Cement

Power station

Steel

Sugar

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