Description
The 115DUB300CACAC is a 30 kW permanent-magnet brushless AC servo motor manufactured by Nidec Control Techniques (formerly Emerson Control Techniques, UK), fitted with a PG115-100 incremental encoder. It belongs to the Digitax HD / M’Ax series family of high-dynamic, low-inertia servo motors, designed for demanding applications in plastics processing, printing, packaging, converting, and high-speed production machinery.
Delivering 30 kW continuous power at 3000 rpm with a rated torque of 191 Nm, the 115DUB300CACAC combines a compact 115 mm frame with a high-energy rare-earth permanent-magnet rotor, liquid cooling as standard, an IP65 sealed enclosure, and a keyed, straight output shaft on an IEC B5 flange. The PG115-100 encoder provides 100 lines of incremental feedback for precise closed-loop speed and position control. Note: this is a legacy, end-of-life model; it remains a critical spare for thousands of installed machines, while new designs should consider current Nidec Control Techniques Digitax HD M’Ax or Unimotor hd equivalents.
Application Scenarios
A European manufacturer of high-speed printing and converting equipment was pushing the limits of its servo-driven web-handling line. The existing motors delivered enough torque at speed, but their high rotor inertia made them sluggish during rapid acceleration and deceleration — the very phases that determine register accuracy and print quality. The engineering team specified the 115DUB300CACAC with the PG115-100 encoder. Its low-inertia rotor and high-energy rare-earth magnet design delivered the required 191 Nm of continuous torque with exceptional dynamic response, while the incremental encoder fed back precise position data to the drive for tight register control.
The result was a measurable jump in both speed and quality: the line achieved higher throughput without losing registration, and the sealed IP65 construction and liquid cooling kept the motor stable in the heated, washdown-prone converting environment. For a machine builder, this combination — high power density, low inertia, and precision feedback in a compact 115 mm frame — is exactly what turns a good machine design into a market-leading one.
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | 115DUB300CACAC |
| Encoder / Feedback | PG115-100 incremental encoder — 100 lines (400 pulses/rev with quadrature), TTL/RS422 output |
| Manufacturer | Nidec Control Techniques (UK); formerly Emerson Control Techniques |
| Product Category | Permanent-magnet brushless AC servo motor (PMSM / synchronous servo) |
| Series / Platform | Digitax HD / M’Ax family; matched to Digitax HD, Unidrive, and Commander SK drives |
| Lifecycle Status | Discontinued (legacy, End-of-Life) — critical spare for installed fleets; current equivalent: Digitax HD M’Ax / Unimotor hd |
| Rated Power | 30 kW (40 HP) continuous — defines sustained shaft output at rated speed |
| Rated Speed | 3000 rpm (continuous) — base speed for rated power and torque |
| Rated Torque | 191 Nm (140.9 lb-ft) continuous at 3000 rpm |
| Peak Torque | 478 Nm (352 lb-ft) — typically 2.5× rated, for acceleration and overload duty |
| Peak Current | 78 Arms |
| Rated Current | 52.4 A (60 A per some variant listings) |
| Voltage Class | 380–480 VAC, 3-phase, 50/60 Hz — 400V class |
| Frequency | 200 Hz (corresponds to 3000 rpm with 4-pole design) |
| Poles | 4-pole (2 pole-pairs) |
| Frame Size | 115 mm (IEC 115) — compact, high power density |
| Rotor Inertia | Low-inertia design — exact value varies by frame; see order-specific datasheet |
| Feedback Resolution | 100 lines/rev (PG115-100); 14-bit absolute option available on equivalent models |
| Brake | Integrated electromagnetic brake available (verify option code) |
| Shaft Type | Straight shaft with keyway (keyed), DIN 6885 A-type key |
| Mounting | IEC B5 flange (DIN 42948); B3/B14/B34 also common in the range |
| Bearing | Oversized, greased-for-life, IP65-sealed bearings; optional angular contact for reversible high axial-load duty |
| Cooling Method | Liquid cooling (water/glycol) as standard — enables continuous full-load operation in compact frame |
| Enclosure Rating | IP65 (IEC 60529) — sealed against dust and low-pressure water jets |
| Operating Temperature | -10°C to +40°C (14°F to +104°F); -25°C cold-start capability |
| Storage Temperature | -40°C to +70°C |
| Humidity | 5% to 95% RH, non-condensing |
| Dimensions (L×W×H) | Approx. 735 × 316 × 262 mm (28.9 × 12.4 × 10.3 in) |
| Weight | Approx. 65 kg (143 lbs) |
| Certifications | CE, UL, cUL, RoHS, REACH |
| Country of Origin | United Kingdom |
