YASKAWA UGTMED-60LMU11 Minertia T Series Large Frame Coreless DC Servo Motor Product Specification

UGTMED-60LMU11 is a high-power large-frame coreless permanent magnet DC servo motor under Yaskawa classic Minertia T product lineup, engineered for heavy-load precision automation, CNC precision machining axes, large-format optical inspection equipment, wire-cut EDM main drive and heavy-duty semiconductor processing machinery. It adopts exclusive disc-type cup coreless rotor structure without silicon steel laminated stator core, completely eliminating cogging torque inherent to conventional iron-core servo motors to deliver ultra-smooth low-speed running with negligible torque ripple and ultra-low rotor inertia for superior instantaneous acceleration and deceleration responsiveness. This model is non-brake standard configuration without built-in power-off electromagnetic holding brake, relying on enlarged cast aluminum housing for full passive natural convection heat dissipation without auxiliary cooling fan design. The digit 60 defines oversized frame specification corresponding to 6.0kW rated continuous power tier of T-series high-power product range; LMU11 stands for factory fixed differential incremental UVW phase encoder with exclusive internal wiring, dedicated connector pin assignment and fixed outgoing cable layout without extra OEM mechanical customization on shaft or casing dimension.

UGTMED serves as unified base serial code for non-brake T-series large-size coreless DC servo motor; numeric code 60 indicates oversized flange frame dimension and fixed 6000W rated continuous output power standard; LMU represents dedicated high-resolution incremental encoder grouping independent from AW, SB and other standard encoder types of Minertia series; trailing double-digit 11 defines factory-locked encoder resolution parameter, internal terminal wiring layout and standard finished cable length specification, with no customized shaft machining, housing modification or special wiring change compared against original standard catalog product.

This high-power servo motor is specified for rated 90VDC armature input voltage and must be matched with dedicated vintage Yaskawa Minertia T-series high-power DC servo amplifier to construct complete closed-loop motion control system. Continuous rated output power reaches 6000W, rated full-load armature operating current is approximately 32.5A under nominal working condition with fixed rated continuous rotation speed at 3000rpm, permissible short-time intermittent peak no-load speed can reach 3600rpm for high-speed transient positioning requirement. Instantaneous peak overload torque can achieve up to 4.2 times rated torque to sustain frequent heavy-load rapid start-stop, emergency deceleration and instantaneous impact load in high-cycle heavy-duty production scenarios. The embedded LMU11 differential line-drive incremental encoder with UVW phase signal output follows proprietary factory wiring specification, which cannot be directly replaced with other model encoders unless full connector rewiring and comprehensive servo drive parameter recalibration are fully completed. Internal stator winding conforms to Class F insulation standard with built-in embedded thermal sensing probe transmitting overheat fault feedback signal to matched servo driver to trigger automatic power cutoff and avoid winding burnout caused by abnormal temperature rise; internal terminal compartment is pre-installed with multi-stage surge suppression components to restrain industrial on-site voltage spike and electromagnetic interference generated by surrounding inverters, high-power switching power supplies and heavy-duty industrial equipment.

Motor integral cast aluminum outer casing complies with IP54 ingress protection rating and adopts full passive natural heat dissipation via enlarged finned housing surface without external cooling fan structure. Front drive end is solid thickened output shaft with integrated standard flat keyway for rigid coupling with large-size precision planetary reducer, heavy-load ball screw and high-torque timing belt pulley; unified oversized standard flange mounting dimension enables direct bolt fixation on heavy equipment base without additional transition fixture, overall net weight of standard factory configuration is roughly 18.8kg.

Valid continuous operating ambient temperature range is 0°C ~ +40°C; allowable long-term component storage temperature spans -20°C ~ +70°C; applicable working relative humidity maintains 5%RH~80%RH under fully non-condensing environment to prevent dew accumulation leading to internal winding short-circuit and encoder circuit damage. When installation altitude exceeds 1000 meters above sea level, rated continuous output load needs proper deration to compensate degraded heat dissipation efficiency under thin atmospheric condition. The motor can endure standard industrial vibration within 10Hz~55Hz frequency scope; installation location with persistent corrosive chemical gas, continuous liquid splashing and dense conductive dust deposition is strictly forbidden to extend service life of heavy-duty bearing, coreless rotor winding and internal LMU11 encoder assembly.

UGTMED-60LMU11 is originally designed to pair with exclusive high-power Minertia T-series DC servo driver from Yaskawa, supporting two mainstream external command input modes including ±10VDC analog speed instruction and differential pulse position command transmitted from upper industrial PLC or large-scale CNC motion controller. The matched servo control system supports free mode switching among position closed-loop control, speed closed-loop control and torque closed-loop control to satisfy diversified heavy-load technological requirements of precision automation and machining equipment. Due to non-brake original design configuration, vertical suspended load installation applications need independent external mechanical locking fixture to prevent free falling of heavy load under unexpected system power failure. Since LMU11 belongs to pure incremental feedback encoder without absolute position storage function, complete mechanical origin homing operation is mandatory after full system power cut before formal equipment startup to recover accurate mechanical zero reference position.

Multi-level comprehensive safety protection mechanism is realized through coordinated operation between internal embedded sensing components and matched high-power servo amplifier unit. Winding over-temperature feedback signal triggers automatic servo shutdown to avoid irreversible thermal damage on large-capacity coreless winding; open-circuit, loose wiring or short-circuit fault of customized LMU11 encoder cable activates exclusive encoder malfunction alarm displayed on servo operation panel; winding short-circuit and abnormal overcurrent state triggers hardware overcurrent protection with instant main power cutoff; abnormal encoder power supply circuit outputs auxiliary warning signal via driver external terminal port. All LMU11 encoder feedback signal circuits are equipped with multi-stage EMI filtering components to filter complex industrial high-intensity electromagnetic interference and guarantee stable real-time high-precision position signal transmission.

Direct on-site equipment replacement requires original UGTMED-60LMU11 spare motor unit only; brake-equipped variant or same-power motor fitted with different specification encoder cannot be directly substituted unless full connector rewiring and overall servo parameter reset work are finished post replacement installation. Before disassembling motor for heavy-duty bearing inspection or internal encoder maintenance, maintenance personnel must fully disconnect 90VDC main armature power supply and wait no less than 20 minutes for complete discharge of internal high-capacity servo DC bus capacitor to eliminate residual high voltage and avoid accidental severe electric shock risk. Routine periodic maintenance includes tightening rear encoder connector fixing screws every three months, replenishing high-temperature resistant heavy-load bearing grease after accumulating over 6000 continuous working hours and cleaning casing fin surface accumulated dust every half year to retain original passive heat dissipation performance. Random modification on exclusive LMU11 encoder pin definition and internal wiring layout will result in unexpected motor runaway and irreversible servo drive hardware locking fault.

This large-frame high-power non-brake coreless DC servo motor is widely applied for main feed drive axis of heavy-duty precision CNC equipment, primary driving unit of large-format wire-cut EDM machine, heavy-load indexing rotary table of large electronic component automated assembly line, main motion drive of oversized optical microscopic inspection machinery and heavy-duty precision forming packaging automation equipment, especially suitable for horizontal fixed installation working condition with heavy load bearing, frequent high-load start-stop action and ultra-high dynamic positioning response requirement.