Schneider Electric BMH1403P06F2A Servo Motor – Lexium BMH Series

Schneider Electric BMH1403P06F2A — 140 mm Brushless AC Servo Motor in the Lexium BMH Series

The BMH1403P06F2A is a mid-to-high torque brushless AC servo motor from Schneider Electric’s Lexium BMH platform. Within a 140 mm (Size 3) frame, this unit delivers a continuous stall torque of approximately 13.4 N·m and a peak torque of up to 40.2 N·m, making it a practical choice for feed axes, gantry drives, and articulated robot joints where torque density and thermal endurance are primary selection criteria. The motor operates on a three-phase sinusoidal commutation principle, driven by a high-resolution incremental encoder that provides the position feedback necessary for closed-loop velocity and position control at the drive level.

The F2A shaft designation in the part number encodes two mechanical attributes: a cylindrical shaft with a parallel key slot (DIN 6885 compliant), and a standard flange-mount configuration. This shaft geometry is compatible with a broad range of planetary gearboxes, timing-belt pulleys, and rigid couplings without requiring custom adapter hardware. The P06 segment of the part number identifies the winding variant — specifically a 400 V AC nominal supply winding optimized for use with the Lexium 32 and Lexium 62 drive families, where the DC bus voltage is derived from a three-phase rectifier stage operating at 380–480 V AC ±10%.

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Technical Parameters

Hardware Logical Analysis

The BMH1403P06F2A uses a permanent magnet synchronous motor (PMSM) topology with a distributed stator winding arrangement. Unlike concentrated-winding designs, the distributed layout reduces the spatial harmonic content of the air-gap flux density, which directly attenuates cogging torque — the periodic reluctance variation that manifests as velocity ripple at low speeds. In precision positioning applications such as PCB drilling or laser cutting, cogging torque above 1–2% of rated torque is detectable at the workpiece level; the BMH series addresses this through skewed rotor laminations combined with the distributed winding, achieving cogging values well within the sub-1% range of rated torque.

The embedded PTC thermistor in the stator winding provides a direct thermal measurement at the hottest point in the motor’s thermal circuit. When interfaced with a Lexium 32 or Lexium 62 drive, the drive firmware monitors the PTC resistance continuously and triggers a configurable thermal warning threshold before the hardware fault threshold is reached. This two-stage thermal management approach allows the control system to reduce duty cycle or speed setpoint proactively, avoiding abrupt fault trips that would interrupt production cycles.

From an EMC perspective, the BMH1403P06F2A’s stator housing is constructed from die-cast aluminum with a conductive surface treatment, providing a low-impedance ground path for high-frequency common-mode currents induced by the PWM switching of the connected servo drive. The motor connector shell is bonded to the housing, ensuring that shield termination of the motor power cable is completed at the motor body rather than floating — a critical detail for installations where the motor cable runs parallel to signal wiring over distances exceeding 3 meters. Schneider Electric specifies shielded motor cables with 360° shield termination at both ends as mandatory for CE-compliant installations, and the BMH1403P06F2A’s connector geometry is designed to accommodate the Lexium BMH cable range’s EMC clamp fittings without additional adapters.

The incremental encoder output uses differential line-driver signals (RS-422 compatible), which provide common-mode noise rejection on the feedback cable. At 6000 rpm maximum speed, the encoder signal frequency reaches several hundred kHz; the differential signaling architecture maintains signal integrity over cable lengths up to 50 meters without repeaters, which is relevant for large machine tools where the drive cabinet is located remotely from the motor axis.

System Integration Benefits

• Zero-parameter auto-tuning with Lexium drives: When connected to a Lexium 32 or Lexium 62 drive, the motor’s electronic nameplate data (stored in the encoder EEPROM on absolute encoder variants) is read automatically at power-up, pre-populating current limits, speed limits, and thermal thresholds without manual entry — reducing commissioning time from hours to minutes.
• Deterministic torque response: The PMSM topology with field-oriented control (FOC) implemented in the Lexium drive delivers torque response times below 1 ms from setpoint change to 90% torque output, enabling tight velocity loop bandwidths above 200 Hz — necessary for high-speed contouring on CNC axes.
• Diagnostic transparency via CANopen / EtherCAT: The Lexium 32 and 62 drives expose motor thermal state, encoder status, and instantaneous torque utilization as process data objects (PDOs) accessible to the PLC in real time, enabling predictive maintenance logic without additional sensors.
• STO (Safe Torque Off) integration: The drive-motor combination supports SIL 2 / PLd Safe Torque Off without a mechanical brake contactor, reducing panel wiring complexity and eliminating a common failure point in safety-rated axes.
• IP54 ingress protection: Suitable for wash-down-adjacent environments in food and beverage packaging lines, where coolant mist and cleaning agents are present, without requiring motor enclosures or additional sealing measures.
• Wide speed range with constant torque: The motor maintains rated continuous torque from near-zero speed up to base speed (3000 rpm), with a field-weakening region extending to 6000 rpm — providing a 2:1 constant-power speed range useful for spindle-type applications requiring both low-speed torque and high-speed finishing passes.
• Modicon PLC native motion library compatibility: When paired with a Modicon M262 or M241 controller running the PLCopen motion library, the BMH1403P06F2A axis can be programmed using standardized MC_MoveAbsolute, MC_MoveVelocity, and MC_GearIn function blocks, reducing application code development time and improving portability across machine variants.
• Gearbox flange standardization: The 140 mm IEC flange and DIN 6885 key shaft are dimensionally compatible with the Lexium PGD/PGE planetary gearbox range as well as third-party gearboxes from Neugart, Apex, and Wittenstein in the same flange class, preserving design flexibility when sourcing gearboxes across supply chains.

Quality Assurance & Global Logistics

Every BMH1403P06F2A unit supplied through siemensplc.com is sourced as genuine Schneider Electric OEM product. Prior to dispatch, each unit undergoes a structured inspection protocol: the motor nameplate data (rated torque, winding code, serial number) is cross-referenced against Schneider Electric’s part traceability database; the shaft runout is checked against the OEM tolerance of ≤0.02 mm TIR; connector pins are inspected for fretting corrosion or deformation; and the encoder connector is verified for correct pin assignment continuity.

Units are packed in anti-static foam-lined cartons with desiccant sachets and humidity indicator cards. For international shipments, the outer carton is reinforced with edge protectors rated for the motor’s 5.3 kg mass under standard air freight handling conditions (ISTA 2A equivalent). Export documentation — including commercial invoice, packing list, and certificate of origin — is prepared in compliance with Chinese customs export regulations and the import requirements of the destination country.

Logistics options from our Xiamen, China warehouse include DHL Express (3–5 business days to most destinations), FedEx International Priority, and sea freight consolidation for bulk orders. All shipments are covered by cargo insurance. Tracking numbers are provided within 24 hours of dispatch. For urgent replacement parts required to restore production, we offer same-day dispatch for in-stock units when orders are confirmed before 14:00 CST.

A 12-month warranty is provided on all units against manufacturing defects. Warranty claims are processed with a replacement-first policy: a replacement unit is dispatched upon receipt of the defective unit’s return shipping confirmation, minimizing production downtime for the end user.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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