Product Details

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

Product Name:	YR 380V Slip Ring LV Motor
Frame:	H400
Power Scope:	220-355KW
Voltage:	380V, 400V, 415V, 460V, 490V, 660V, 690V,1140V
Frequency:	50Hz, 60Hz
Number of Poles:	6P
Speed:	1000rpm
Cooling Method	IC411
Protection Grade	IP23
Insulation Class	F(155℃), H(180℃)
Duty:	S1, S4, S5, S6, S9
Mounting Type	B3/ B5/ B35/ V1
Standard:	IEC
Efficiency Grade:	IE1