Brushless DC Motors

Dunkermotoren BG42 KI Brushless DC Motor

The Dunkermotoren BG 42 KI is a highly dynamic 3-phase BLDC motor family with an 8-pole neodymium magnet and integrated commutation electronics. It is designed for compact motion systems that need efficient brushless performance, selectable rotational direction, and straightforward electronic integration. The family also features integrated 24 c...

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The Dunkermotoren BG 42 KI is a highly dynamic 3-phase BLDC motor family with an 8-pole neodymium magnet and integrated commutation electronics. It is designed for compact motion systems that need efficient brushless performance, selectable rotational direction, and straightforward electronic integration. The family also features integrated 24 cpr feedback and is built to fit within Dunkermotoren’s modular drive platform.

The BG 42 KI range includes BG 42x15 KI, BG 42x30 KI, and BG 42x45 KI versions in 12Vdc and 24Vdc supply options, with the BG 42x45 KI offered in 24Vdc. Across the family, nominal torque spans from 0.101 Nm to 0.245 Nm, nominal speed ranges from 3,600 rpm to 3,750 rpm, and continuous output power reaches up to 87 W with peak output power up to 226 W. These characteristics make the series suitable for dynamic drive tasks where compact size and responsive performance matter.

The motor family can be combined with encoders and gearboxes within the modular system to support a wide range of geared and feedback-equipped motion solutions. Protection class is rated up to IP40, while the catalogue page shows motor lengths of 65 mm, 80 mm, and 95 mm with motor weights from 0.36 kg to 0.58 kg. This makes the BG 42 KI a strong choice for applications that need modularity, reliable control integration, and high performance in a compact motor package.

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BG42 KI
Features
  • Highly dynamic 3-phase BLDC motor with 8-pole neodymium magnet.
  • Integrated commutation electronics.
  • Selectable rotational direction.
  • Digital inputs and digital outputs.
  • Integrated 24 cpr feedback.
  • Supply voltage versions in 12Vdc and 24Vdc.
  • Protection class up to IP40.
  • Premium efficiency.
  • Can be combined with encoders and gearboxes within the modular system.
  • BG 42x45 KI 24V data is marked preliminary in the family table.
Specifications
BG 42 KI Specifications
Parameter Units BG 42x15
12V
BG 42x15
24V
BG 42x30
12V
BG 42x30
24V
BG 42x45
24V*
Nominal voltage VDC 12 24 12 24 24*
Nominal current A* 4.2 2.1 5.9 3.3 4.4
Nominal torque Nm* 0.101 0.106 0.138 0.166 0.245
Nominal speed rpm* 3610 3610 3750 3670 3600
No load speed rpm* 4300 4250 4175 4120 4500
Nominal output power W** 38 40 54 64 87
Maximum output power W 65 79 81 110 226
Torque constant Nm A⁻¹*** 0.028 0.058 0.029 0.061 0.055
Peak current A** 9.5 6.5 9.5 6.5 6.5
Rotor inertia gcm² 24 24 44 44 64
Weight of motor kg 0.36 0.36 0.47 0.47 0.58
*) Δϑw = 100 K; **) ϑR = 20°C ***) at nominal point; *preliminary data for BG 42x45 KI
Downloads
Datasheet_bg_42_ki_en_1.pdf
Warranty & Returns

Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.