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Kollmorgen B-202-C-99-270
Product Classification: Frameless Brushless DC Torque Motor
Product Overview:
The B-202-C-99-270 is a frameless torque motor from the B-Series with a 270° continuous rotation capability (not full 360° — limited rotation for valve or gimbal applications). The “C” suffix denotes a specific winding configuration.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Series | B-Series (Frameless) |
| Part Number | B-202-C-99-270 |
| Outer Diameter | 50.8 mm (2.00 in) |
| Inner Diameter (Bore) | 25.4 mm (1.00 in) |
| Stack Length | 25.4 mm (1.00 in) |
| Continuous Torque | 0.28 Nm (2.5 lb-in) |
| Peak Torque | 0.85 Nm (7.5 lb-in) |
| Continuous Speed | 4,000 RPM |
| Max Speed | 10,000 RPM |
| Rotation Angle | 270° (limited) |
| Voltage Constant (Ke) | 4.1 V/krpm |
| Torque Constant (Kt) | 39.0 mNm/A |
| Terminal Resistance (Rt-t) | 5.6 Ω |
| Terminal Inductance (Lt-t) | 9.2 mH |
| Thermal Resistance (Rth) | 8.5 °C/W |
| Weight | 0.23 kg (0.5 lb) |
| Winding Configuration | 3-Phase, Y-connected |
| Encoder Option | Resolver (99 = resolver variant) |
| Insulation Class | Class H (180°C) |
| Bearing Type | None (customer-supplied) |
Structural Features:
- Limited rotation (270°) — mechanical hard stops or software limits required
- Frameless: Stator and rotor only
- Compact form factor — ideal for tight spaces
- SmCo magnets for high-temperature stability
Applicable Industries:
- Valve actuators
- Gimbal mechanisms
- Antenna azimuth/elevation
- Optical mirror positioning
- Robotic wrist joints
Installation Requirements:
- Custom housing required with 270° mechanical travel limit
- Precision bearing selection mandatory (angular contact recommended)
- Thermal path to housing required
Usage Notes:
- Do not exceed 270° rotation — mechanical end stops are mandatory
- Resolver signal conditioning required
- Verify demagnetization temperature not exceeded (150°C for SmCo)
