YASKAWA UGTMEM-01MMGB3X Minertia T Series Coreless DC Servo Motor Specification

UGTMEM-01MMGB3X belongs to Yaskawa Minertia T miniature coreless DC servo motor lineup, engineered specifically for high-precision micro-positioning equipment, semiconductor micro-assembly stations, optical inspection devices and compact automated precision machinery. Equipped with proprietary cup-type coreless rotor design without laminated silicon steel, this unit eliminates inherent cogging torque existing in conventional iron-core servo motors and realizes ultra-smooth low-speed rotation with negligible torque fluctuation. Benefiting from ultra-low rotor inertia, the motor delivers outstanding dynamic responsiveness for frequent high-speed start-stop and rapid direction switching operations. This variant comes without integrated power-off electromagnetic holding brake to retain compact overall dimension and lightweight structure, adopting fully enclosed natural air cooling layout with no auxiliary cooling fan installed. MMGB3X denotes factory-customized differential incremental encoder configuration integrated with UVW pole phase signals, featuring exclusive internal wiring layout, fixed cable specification and dedicated pin definition different from AW, SB, LMU and regular MMG coded motor versions.

UGTMEM serves as the base series code for non-brake coreless DC servo motors under Minertia T family; the numeric segment 01 stands for the smallest frame size corresponding to 100W rated continuous output power. MMGB identifies a customized incremental encoder group with unique terminal assignment and internal cabling design, while suffix B3X specifies factory preset encoder pulse specification, finished outgoing cable length, internal terminal arrangement and non-standard production revision without custom machining on output shaft or motor housing. Direct cross replacement with motors carrying other encoder coding is not feasible without complete recabling and servo parameter recalibration.

The motor is designed for 90VDC rated armature operating voltage and must be paired with original Yaskawa Minertia T-series dedicated DC servo drive to construct a complete closed-loop control system. Its nominal continuous rated power reaches 100W with rated full-load armature current around 1.1A under standard working conditions; rated continuous operating speed is fixed at 3000rpm and short-duration peak no-load rotational speed can hit 3800rpm. Instantaneous peak overload torque is capable of reaching five times the rated torque to satisfy high-cycle frequent start-stop and transient impact load requirements. The built-in MMGB3X differential line driver incremental encoder is bundled with UVW magnetic pole origin signals following original manufacturer exclusive wiring standard, which cannot be substituted by other specification encoders unless all connector pins are redefined and full servo parameter tuning is completed afterwards. Internal stator winding conforms to Class F insulation grade, with embedded thermal sensing component that feeds overheat alarm signal to matched servo driver for automatic shutdown protection against winding over-temperature burnout. Surge suppression circuit components are pre-mounted inside internal wiring compartment to suppress industrial instantaneous voltage spike and electromagnetic interference from surrounding switching power and inverter devices.

The fully sealed motor housing achieves IP54 ingress protection rating and relies entirely on casing natural convection for heat dissipation without extra cooling fan assembly. Standard solid output shaft with flat keyway is equipped for rigid connection with miniature precision ball screw, small timing belt pulley and compact planetary reducer. Thanks to brake-free compact construction, the axial overall size is optimized, and the net weight of the complete motor assembly is approximately 0.42kg with unified miniature flange mounting dimension for direct installation on narrow-space equipment frames without transitional fixture modification.

Valid continuous operating ambient temperature ranges from 0°C to +40°C; permitted spare part storage temperature covers -20°C to +70°C; applicable working environment relative humidity is controlled between 5%RH and 80%RH under non-condensing working condition to prevent dew-induced internal circuit short circuit damage. If installation elevation exceeds 1000 meters above sea level, continuous operational load shall be properly derated to compensate reduced heat dissipation efficiency under thin atmospheric environment. The motor can endure standard industrial vibration within 10Hz~55Hz frequency band; installation sites with corrosive gas, continuous liquid splash and dense conductive dust accumulation are forbidden to prolong service life of front-end bearing, internal winding and encoder components.

UGTMEM-01MMGB3X is originally compatible with classic Yaskawa Minertia T-series dedicated DC servo amplifiers, supporting two mainstream external command input forms including ±10VDC analog speed instruction and differential pulse position command transmitted from upper-layer PLC or miniature CNC controllers. The matched servo control system supports free switching among position closed-loop, speed closed-loop and torque closed-loop control modes according to different production process requirements. Since no built-in power-off brake is configured, equipment installed vertically with this motor needs to be equipped with independent external mechanical locking mechanism to avoid free fall of load after unexpected power cutoff. As the onboard MMGB3X incremental encoder has no absolute position memory function, full mechanical origin homing operation is mandatory after complete system power outage before formal equipment startup to restore accurate mechanical zero point for subsequent precision positioning movements.

Multi-level comprehensive safety protection is realized via coordination between internal embedded sensing components and matched servo drive unit. Winding over-temperature trigger will initiate servo automatic overload shutdown to avoid permanent thermal damage of coreless winding; open circuit or poor contact of MMGB3X dedicated encoder cable will activate independent encoder fault warning displayed on servo operation panel; winding short-circuit and abnormal overcurrent input will trigger hardware overcurrent protection and immediate main power cut-off. All internal encoder feedback signal circuits are pre-installed with noise filtering elements to filter complex field electromagnetic interference and guarantee stable transmission of position feedback signals.

Field replacement requires identical original UGTMEM-01MMGB3X spare motor; same-power motor with different encoder coding or brake-equipped variant cannot be directly mounted for substitution unless full connector rewiring and complete servo parameter resetting are finished after installation. Before disassembling the motor for bearing inspection or encoder maintenance, maintenance personnel must fully disconnect 90VDC main armature power supply and wait no less than 15 minutes for full discharge of internal DC bus capacitor of matched servo drive to eliminate residual high voltage and prevent electric shock hazard. Routine maintenance items include fastening rear connector fixing screws every three months, replenishing high-temperature resistant bearing grease after cumulative running time exceeds 8000 continuous operating hours and cleaning housing accumulated dust every six months to retain original natural heat dissipation performance. Arbitrary modification on MMGB3X exclusive encoder pin definition and internal wiring layout will result in unexpected motor runaway and permanent servo driver locking fault.

This compact non-brake coreless DC servo motor is widely adopted for micro feed axes of desktop precision testing instruments, small indexing positioning turntable of micro-component automatic assembly production lines, fine drive units of optical microscopic inspection equipment and miniaturized precision packaging automation machinery. It is especially suitable for horizontally mounted equipment with limited installation space, frequent cyclic start-stop movement and high-precision repeated positioning control demands.