BAUMULLER BM4443-A/1-012 00-03

Digital guide

BAUMULLER BM4443-A/1-012 00-03

Product Introduction:
The BAUMULLER BM4443-A/1-012 is a standard-design servo motor from the BM44xx series. The “A” designation indicates the standard mechanical configuration with a keyed shaft. The “/1” suffix denotes an optional single-turn absolute encoder configuration. Winding 012 corresponds to 230 V AC rated operation. This motor serves as a versatile drive solution for general-purpose servo applications.

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Technical Specifications:

Motor Type: Permanent Magnet Synchronous Servo Motor (PMSM)
Cooling Method: Natural Convection (IC410)
Encoder: Single-Turn Absolute (Hiperface) — Optional Configuration
Rated Voltage: 230 V AC (winding 012)
Rated Speed: Up to 4,500 rpm
Rated Torque: Approximately 1.5 Nm (continuous)
Peak Torque: Approximately 6.0 Nm (short-term)
Rated Power: Approximately 0.6 kW
Insulation Class: F (155 °C)
Protection Class: IP54 (with connector: IP65)
Duty Cycle: S1 (Continuous)
Shaft Diameter: 14 mm with keyway (DIN 6885-1)
Weight: Approximately 3.2 kg

Functional Features:

Standard keyed shaft for direct mechanical coupling
Optional single-turn absolute encoder for position-critical applications
Natural convection cooling — no fan noise
High reliability for continuous industrial operation

Performance Parameters:

Maximum Continuous Torque: 1.5 Nm
Maximum Peak Torque: 6.0 Nm (10× rated, < 1 s)
Nominal Speed Range: 0 – 4,500 rpm
Torque Constant (Kt): Approximately 0.36 Nm/A
Back-EMF Constant (Ke): Approximately 0.36 V/(rad/s)
Rotor Inertia (Jm): Approximately 0.00018 kg·m²
Mechanical Time Constant (τm): Approximately 6 ms
Electrical Time Constant (τe): Approximately 2.5 ms

Material Composition:

Stator Core: Grain-Oriented Silicon Steel, 0.5 mm laminations
Rotor: NdFeB N42SH magnets, epoxy-bonded
Windings: Copper, Class F insulation, vacuum-impregnated (VPI)
Housing: Aluminum ADC12 die-cast, corrosion-resistant coating
Shaft: C45E steel, induction-hardened surface, chrome-plated
Bearings: FAG/SKF deep groove, pre-greased, sealed (2RS)

Structural Features:

Front flange mount with 4 × M5 bolt holes
Keyed shaft per DIN 6885-1, 14 mm diameter
M20 cable gland at drive end
Encoder connector M23, 12-pin (when equipped)
Compact cylindrical profile: 115 mm length total

Working Principle:
The servo drive supplies three-phase sinusoidal currents to the stator windings, generating a rotating magnetic field. The permanent magnet rotor synchronously follows this field, producing torque proportional to current. The optional Hiperface encoder on the shaft provides absolute angular position in Gray code format, enabling the drive to execute precise position, velocity, and torque control loops without a reference run.

Advantages:

Standard design with keyway enables direct coupling to gears, pulleys, and lead screws
Cost-effective solution for general servo applications
IP65 option available with connector
Low maintenance — sealed bearings, no fan replacement

Applicable Industries: