UAASWD-30LWU11 AC Spindle Motor Product Specification
UAASWD-30LWU11 is a heavy-duty external forced-air cooled permanent magnet AC spindle motor developed and manufactured by Yaskawa Electric within the mature UAASWD product series, specially engineered for large-scale heavy-cut vertical machining centers, oversized CNC lathes, heavy mold processing equipment and fixed high-load cutting stations on automated metal fabrication production lines. This high-power spindle motor is built with high-density stacked silicon steel stator core and high-performance rare-earth permanent magnet rotor assembly, featuring an ultra-wide constant-power speed regulation range, stable ultra-high low-speed continuous torque output and low-vibration high-speed sustained running capability to cope with frequent forward and reverse rotation switching, long-duration heavy rough cutting of thick metal blanks and uninterrupted precision finish machining of ferrous metals, high-hardness alloy steel and large-size non-ferrous workpieces. Equipped with an independent external blower forced cooling structure, the motor maintains stable thermal dissipation efficiency under full-load continuous operation and effectively avoids unexpected thermal protection shutdown under prolonged intensive heavy cutting working conditions. The suffix LWU11 stands for exclusive OEM customized configuration including regional special winding layout, built-in multi-turn absolute precision feedback encoder and tailor-made dimensional parameters for output shaft, keyway structure and mounting flange specification. This customized variant cannot be directly replaced by standard 30-frame universal spindle motors unless complete mechanical modification and servo drive parameter reset are fully implemented. Original brand-new mass production of this specification has been phased out, and current market available products mainly include surplus original unused inventory and professionally overhauled refurbished units which pass full factory-standard aging test, dynamic balance calibration and high-pot withstand voltage inspection before being used for equipment maintenance replacement.
Description
UAASWD-30LWU11 AC Spindle Motor Product Specification
1. Product Overview
UAASWD-30LWU11 is a heavy-duty external forced-air cooled permanent magnet AC spindle motor developed and manufactured by Yaskawa Electric within the mature UAASWD product series, specially engineered for large-scale heavy-cut vertical machining centers, oversized CNC lathes, heavy mold processing equipment and fixed high-load cutting stations on automated metal fabrication production lines. This high-power spindle motor is built with high-density stacked silicon steel stator core and high-performance rare-earth permanent magnet rotor assembly, featuring an ultra-wide constant-power speed regulation range, stable ultra-high low-speed continuous torque output and low-vibration high-speed sustained running capability to cope with frequent forward and reverse rotation switching, long-duration heavy rough cutting of thick metal blanks and uninterrupted precision finish machining of ferrous metals, high-hardness alloy steel and large-size non-ferrous workpieces. Equipped with an independent external blower forced cooling structure, the motor maintains stable thermal dissipation efficiency under full-load continuous operation and effectively avoids unexpected thermal protection shutdown under prolonged intensive heavy cutting working conditions. The suffix LWU11 stands for exclusive OEM customized configuration including regional special winding layout, built-in multi-turn absolute precision feedback encoder and tailor-made dimensional parameters for output shaft, keyway structure and mounting flange specification. This customized variant cannot be directly replaced by standard 30-frame universal spindle motors unless complete mechanical modification and servo drive parameter reset are fully implemented. Original brand-new mass production of this specification has been phased out, and current market available products mainly include surplus original unused inventory and professionally overhauled refurbished units which pass full factory-standard aging test, dynamic balance calibration and high-pot withstand voltage inspection before being used for equipment maintenance replacement.
2. Model Code Definition
UAASWD is the unified base series identifier of Yaskawa external air-cooled AC spindle motor, among which UA represents AC spindle product classification, S refers to optimized high-efficiency laminated stator core design, W denotes fixed standard industrial three-phase winding base specification, and D stands for enhanced heavy-load mechanical framework to bear strong radial and axial cutting impact load. The numeric code 30 corresponds to large frame size with S3 intermittent rated output power of 30kW as the core rated power parameter of this model. Letter L indicates customized wide-range input winding tailored for variable industrial power grid voltage fluctuation; W keeps the standardized main winding structure matching factory defined voltage grade; U represents upgraded reinforced heavy-duty rolling bearing group designed against severe impact generated during deep rough cutting of thick steel blanks. The final two digits 11 define exclusive customized mechanical specifications including dedicated output shaft dimension and flat keyway size, unique flange mounting hole distribution layout and fixed pin assignment of aviation connectors for power cable and encoder signal wiring, forming an independent customized specification different from other regular 30kW spindle motor variants in the same series.
3. Electrical Performance Specification
This spindle motor adopts fixed three-phase industrial AC input design and must be paired with original dedicated Yaskawa spindle servo driver to build complete full-digital vector closed-loop speed and position control system. Its S3 intermittent rated output power reaches 30kW with matched rated operating current optimized for continuous heavy-load cutting scenarios, and the motor can output up to three times instantaneous peak overload torque to absorb transient impact load caused by deep rough cutting of cast iron, high-carbon steel and oversized aluminum alloy forgings. The built-in multi-turn absolute encoder defined by LWU coding continuously transmits real-time rotational speed and absolute angular position digital serial signals to the matched servo drive unit, fully supporting core CNC precision machining functions including high-precision rigid tapping, automatic fixed spindle orientation positioning and constant peripheral speed turning required for heavy mold and large mechanical component production. Internal stator winding complies with international Class F insulation standard and is pre-installed with embedded temperature sensing elements; once continuous abnormal overload leads to winding overtemperature, the matched drive receives real-time temperature alarm signals and automatically implements output derating or safety power cutoff to prevent permanent winding burnout failure. Internal circuit is integrated with surge suppression components to restrain instantaneous voltage spike and complex electromagnetic interference induced by surrounding frequency converters and switching power supply equipment, securing stable long-term running performance under unstable factory power grid environment.
4. Mechanical Structure and Environmental Application Requirements
The motor main housing is made of high-strength integral cast aluminum alloy with IP54 standard dustproof and splash-proof protection grade, cooperating with separated independent external cooling fan module to realize efficient forced convection heat dissipation, possessing prominent continuous heavy-load heat resistance far superior to natural cooling spindle motors. The front end is fitted with solid integral customized output shaft with exclusive LWU11-spec flat keyway for rigid connection with large-size synchronous belt pulley, heavy-duty reduction gearbox or direct-coupled machine tool spindle assembly; the rear casing reserves fixed installation space for LWU11 exclusive customized aviation plugs following factory fixed pin definition rules for main power wiring and encoder signal connection. Standard flange mounting design enables direct bolt fastening onto machine spindle box without additional transition fixture machining.
Valid continuous operating ambient temperature ranges from 0°C to +40°C, permissible long-term storage temperature spans -20°C to +70°C; applicable working environment relative humidity is limited between 5%RH and 80%RH under non-condensing condition to avoid internal metal corrosion and internal circuit short-circuit faults. When installation altitude exceeds 1000 meters above sea level, users must appropriately reduce continuous working load to compensate heat dissipation degradation caused by decreased air density at high altitude. The motor can withstand regular industrial vibration within 10Hz to 55Hz frequency range; installation and operation in sites filled with corrosive chemical gas, dense accumulated oil mist and scattered conductive metal dust are strictly prohibited to extend service life of internal bearings, stator winding and precision multi-turn encoder core components.
5. Application Scope and Routine Maintenance Guidance
UAASWD-30LWU11 is widely adopted as core spindle driving unit for large heavy-duty vertical machining centers, oversized CNC turning centers, large mold engraving and milling equipment and fixed high-load cutting stations on automated continuous production lines, applicable for rough removal processing and high-precision finish machining of thick ferrous metal blanks, large-size high-strength alloy workpieces and oversized high-hardness engineering plastic structural parts. During daily regular maintenance, equipment operators need periodic cleaning of external cooling fan filter screen to eliminate dust blockage that triggers poor heat dissipation and unexpected over-temperature protection shutdown; regular inspection of output shaft bearing lubrication condition and aviation connector wiring tightness is required to avoid bearing oil leakage and loose wiring-induced irregular spindle speed fluctuation. For breakdown replacement maintenance on production equipment, original matching multi-turn absolute encoder and exclusive LWU11-spec dedicated power cables must be selected; mismatched non-original replacement accessories will cause invalid feedback signal and even out-of-control spindle runaway fault. All aftermarket refurbished spare motors will complete winding high-pot withstand voltage testing, rotating part dynamic balance calibration and full-load continuous aging testing per original factory technical specifications before delivery to guarantee consistent performance parameters matching brand-new original specification products.
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