Product Details

Brief Introduction

The YR-900-8 brushless asynchronous induction motors address critical end-winding vibration risks through reinforced structural integration. Its stator employs slot reinforcement rings and epoxy-molded nose joints to withstand startup electromagnetic forces (dF=IdLB) during locked-rotor conditions.

 

This brushless asynchronous induction motors feature multi-layer bracing:

Glass-fiber binding systems securing phase connectors

Non-magnetic end-rings eliminating eddy-induced heating

Pre-impregnated filling interstitial voids

Advanced insulation protocols include:
Slot Enhancement: Mica-based armor extending 50mm beyond core ends
Corona Suppression: Conductive tapes grading electrical stress at transition zones
Thermal Management: Open radial ventilation maintaining ≤80°C hotspot differential

The windings undergo vacuum pressure impregnation (VPI) followed by rotational curing to ensure unity between conductors and insulation. For 2-pole high-speed applications, dynamic balancing achieves G2.5 vibration levels despite inherent 100Hz magnetic pulsations. Validation testing confirms:

Withstands 5× rated current during 10-second stalled starts

No resonant frequencies below 120Hz in end-winding assemblies

Partial discharge <5pC at 2Uₙ+1kV

This brushless asynchronous induction motors delivers exceptional reliability for compressor and pump drives where winding fatigue historically caused failures. Maintenance protocols mandate biennial torque checks on bracing systems and annual thermographic inspections.

 

 

Main Technical Parameters

Product Name:	YR 380V Slip Ring HV Motor
Frame:	H900
Power Scope:	4000-5600KW
Voltage:	380V, 400V, 415V, 460V, 490V, 660V, 690V,1140V
Frequency:	50Hz, 60Hz
Number of Poles:	8P
Speed:	745rpm
Cooling Method	IC01/IC81W
Protection Grade	IP23/55
Insulation Class	F(155℃), H(180℃)
Duty:	S1, S4, S5, S6, S9
Mounting Type	B3/ B5/ B35/ V1
Standard:	IEC
Efficiency Grade:	IE1