Complementary
Maximum mechanical speed	3000 rpm
[Us] rated supply voltage	220 V
Network number of phases	Three phase
Continuous stall current	19.68 A
Continuous stall torque	28.65 N.m for LXM28 at 22.9 A, 220 V, three phase
Continuous power	4500 W
Peak stall torque	71.62 N.m for LXM28... at 22.9 A, 220 V, three phase
Nominal output power	4500 W for LXM28... at 22.9 A, 220 V, three phase
Nominal torque	28.65 N.m for LXM28... at 22.9 A, 220 V, three phase
Nominal speed	1500 rpm for LXM28... at 22.9 A, 220 V, three phase
Maximum current Irms	57.6 A for LXM28... at 4.5 kW, 220 V
Maximum permanent current	22.8 A
Product compatibility	LXM28... servo drive motor at 4.5 kW, 220 V, three phase
Shaft end	Smooth shaft
Shaft diameter	35 mm
Shaft length	79 mm
Feedback type	20 bits single turn absolute encoder
Holding brake	With
Holding torque	48 N.m built-in
Mounting support	Asian standard flange
Motor flange size	180 mm
Electrical connection	Connector MIL
Torque constant	1.46 N.m/A at 20 °C
Back emf constant	88 V/krpm at 20 °C
Number of motor poles	5.0
Rotor inertia	74 kg.cm²
Stator resistance	0.199 Ohm at 20 °C
Stator inductance	3.8 mH at 20 °C
Stator electrical time constant	19.1 ms at 20 °C
Maximum radial force Fr	1200 N at 1500 rpm
Maximum axial force Fa	497 N
Brake pull-in power	49.6 W
Type of cooling	Natural convection
Length	279 mm
Number of motor stacks	3
Centring collar diameter	114.3 mm
Centring collar depth	4 mm
Number of mounting holes	4
Mounting holes diameter	13.5 mm
Circle diameter of the mounting holes	200 mm
Distance shaft shoulder-flange	4 mm
Net weight	28 kg
Sizing reference	BCH2
Accuracy error [angular]	0.044 °
Temperature copper hot	135 °C
Temperature magnet hot	100 °C
Temperature magnet rt	20 °C
Inertia	73.99 kg.cm² of brake; 74.0 kg.cm² of motor
Contractual warranty
Warranty (in months)	18
Environment
IP degree of protection	IP50 IM V3; IP65 IM B5, IM V1
Ambient air temperature for operation	0…40 °C
Main
Range of product	Lexium 28
Range compatibility	Lexium 28
Product or component type	Servo motor
Device short name	BCH2
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	24.5 cm
Package 1 Width	29.0 cm
Package 1 Length	58.5 cm
Package 1 Weight	29.63 kg

BCH2 servo motor from the Lexium 28 servo drive series. The BCH2 series includes brushless synchronous AC servo motors with compact dimensions for dynamic applications. This servo has a nominal continuous stall torque of 28.65 Nm. Its winding type is optimized for torque at 1500 rpm and has a medium moment of inertia. The nominal power is 4500 W. The electrical connection is made via MIL connector. The motor flange is 180 mm for fastening. A high-resolution 20-bit absolute encoder as a single turn enables precise control. The shaft end is smooth and designed in accordance with protection class IP65. The motor housing corresponds to protection class IP65. A holding brake is integrated. The associated servo amplifier from the Lexium 28 series is intended for operation: LXM28.U20M3X. Thanks to the Green Premium ecolabel, you can obtain detailed information on material content, environmental impact and circular economy that supports your sustainability goals.