Product Short Description
Manufacturer: Baumuller Nuernberg GmbH (Germany)
Product Overview:
The BUM61-2030-54-B is a water-cooled synchronous servo motor from Baumuller’s BUM series, designed for high-power continuous duty applications. The suffix breakdown: BUM61 = frame size, 2030 = length code, 54 = winding variant, B = version code.
Description
Technical Specifications:
| Parameter | Value |
|---|---|
| Frame Size | BUM61 (165 mm flange) |
| Motor Type | Permanent Magnet Synchronous Motor (PMSM) |
| Rated Power (S1) | 7.5 kW (continuous) |
| Rated Torque (S1) | 23.9 Nm |
| Peak Torque (S3 40%) | 71.7 Nm |
| Rated Speed | 3,000 RPM |
| Maximum Speed | 4,500 RPM |
| Cooling Method | Water-cooled (external cooling jacket) |
| Coolant | Deionized water / glycol mixture, 20°C, 2 bar, 3 L/min |
| Encoder | Multiturn absolute encoder (Hiperface DSL, 2048 periods) |
| Encoder Resolution | 2048 periods × 2048 = 4,194,304 counts/rev |
| Supply Voltage | 400V AC (three-phase) |
| Insulation Class | Class H (180°C) |
| Protection Rating | IP65 (with connector cover) |
| Shaft Diameter | 32 mm |
| Shaft Type | Keyed shaft with keyway, shaft seal (IP65) |
| Weight | Approximately 32 kg |
| Bearings | Deep groove ball bearings (grease-lubricated) |
| Ambient Temperature | -10°C to +40°C (with derating above 40°C) |
| Certifications | CE, UL, CSA, RoHS |
Functional Features:
- Water-cooled design — enables continuous high-torque operation without derating
- Multiturn absolute encoder — position known after power-off (no homing required)
- Hiperface DSL interface — high-speed, noise-immune encoder communication
- High overload capacity — 3x rated torque for short duration
- Integrated temperature sensor (PTC) in winding
- Compatible with Baumuller b maXX 5000 and b maXX 6000 servo drives
Working Principle:
The three-phase stator windings are energized by a servo drive to create a rotating magnetic field. The permanent magnet rotor follows this field synchronously. The water-cooled jacket removes heat directly from the stator, allowing continuous rated power output without thermal derating. The absolute encoder tracks position across power cycles, enabling instant operation after startup.
Advantages:
- Water cooling eliminates thermal derating — full power at all speeds
- Absolute encoder — no homing sequence required
- Class H insulation — 180°C thermal rating for high reliability
- IP65 — suitable for harsh industrial environments
Applicable Industries:
Metal forming (presses, shears), plastic injection molding, printing presses, wind tunnel drives, heavy-duty CNC machines, marine propulsion
Installation Requirements:
- Mount on rigid base with 4x M10 mounting holes (165mm flange pattern)
- Connect cooling water circuit: 2 bar pressure, 3 L/min flow, 20°C inlet
- Use shielded encoder cable (Hiperface DSL, max 50m)
- Couple to load via torsionally stiff coupling (max 0.05mm misalignment)
- Ground motor frame and coolant pipes
Usage Notes:
- Never run motor without coolant flow — will overheat in <30 seconds
- Use deionized water to prevent internal corrosion
- Perform encoder alignment after mechanical installation
- Monitor coolant temperature — shut down if >35°C inlet
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