Yaskawa SGMSH Servo Motors: SGMSH-15ACA-TV11

Technical Dossier

Product Details And Specifications

Yaskawa SGMSH Series: Comprehensive Module Range and Technical Overview

The Yaskawa SGMSH series belongs to the Sigma-II (Σ-II) AC servo motor family, engineered for high-inertia, high-torque applications in heavy industrial environments. Deployed extensively in chemical processing plants, petroleum refineries, nuclear facility auxiliary systems, steel rolling mills, and large-scale CNC machining centers, the SGMSH frame is the standard choice where load inertia ratios exceed the capacity of standard Sigma-II SGMS frames. The series operates in conjunction with SGDH and SGDM series servo drives (SERVOPACKs), forming a closed-loop motion control system that meets the continuous-duty cycle demands of process-critical machinery. Global installed base spans Asia-Pacific, Europe, and North America, with the series remaining active in long-cycle capital equipment that carries 15–25 year operational lifespans.

The Evolution of SGMSH Architecture

The SGMSH series was introduced as part of Yaskawa's Sigma-II platform in the late 1990s, succeeding the Sigma-I (SGMD/SGMG) generation. The core architectural advancement was the integration of a 17-bit incremental encoder (standard) and optional 17-bit absolute encoder, replacing the earlier 13-bit resolvers. This increased positioning resolution from 8,192 pulses/rev to 131,072 pulses/rev, enabling sub-micron repeatability in precision axes.

Frame construction uses a flange-mount (IEC 72-1) housing with IP67 ingress protection on shaft-end seals, suitable for wash-down and coolant-exposed environments. Winding insulation class is F (155°C), with thermal protection via embedded thermistor (PTC). The SGMSH suffix structure encodes rated output (e.g., 15 = 1.5 kW), voltage class (A = 200 VAC), encoder type (C = 17-bit incremental), and mounting/brake options (TV11 = with holding brake, standard shaft).

Compatibility note: SGMSH motors require SGDH-series SERVOPACKs with matching capacity codes. They are not directly interchangeable with Sigma-V (SGMGV) or Sigma-7 (SGMGV7) motors without drive replacement, due to encoder protocol differences (MECHATROLINK-II vs. MECHATROLINK-III). For facilities planning long-term maintenance, DriveKNMS maintains cross-reference documentation for upgrade path planning.

SGMSH Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified SGMSH production range. All models are AC servo motors in the Sigma-II high-inertia frame class, rated for 200 VAC three-phase input unless noted.

SGMSH-01ACA61: 100 W, 17-bit incremental encoder, standard shaft, no brake — entry-level SGMSH for light auxiliary axes.
SGMSH-02ACA61: 200 W, 17-bit incremental encoder, standard shaft, no brake — compact frame for positioning tables.
SGMSH-04ACA61: 400 W, 17-bit incremental encoder, standard shaft, no brake — mid-range output for conveyor drives.
SGMSH-05ACA61: 500 W, 17-bit incremental encoder, standard shaft, no brake — standard workhorse for single-axis CNC.
SGMSH-08ACA61: 750 W, 17-bit incremental encoder, standard shaft, no brake — high-torque density for rotary indexers.
SGMSH-10ACA61: 1.0 kW, 17-bit incremental encoder, standard shaft, no brake — common in packaging line servo axes.
SGMSH-15ACA61: 1.5 kW, 17-bit incremental encoder, standard shaft, no brake — baseline 1.5 kW SGMSH without brake option.
SGMSH-15ACA-TV11: 1.5 kW, 17-bit incremental encoder, standard shaft, with 24 VDC holding brake — the subject SKU; used in vertical axes requiring fail-safe brake engagement on power loss.
SGMSH-20ACA61: 2.0 kW, 17-bit incremental encoder, standard shaft, no brake — heavy-duty feed axis for milling machines.
SGMSH-20ACA-TV11: 2.0 kW, 17-bit incremental encoder, standard shaft, with holding brake — vertical axis variant for 2 kW class.
SGMSH-30ACA61: 3.0 kW, 17-bit incremental encoder, standard shaft, no brake — large-frame SGMSH for heavy gantry axes.
SGMSH-30ACA-TV11: 3.0 kW, 17-bit incremental encoder, standard shaft, with holding brake — crane and hoist auxiliary servo.
SGMSH-50ACA21: 5.0 kW, 17-bit incremental encoder, standard shaft, no brake — high-power SGMSH for main spindle assist.
SGMSH-50ACA-TV11: 5.0 kW, 17-bit incremental encoder, standard shaft, with holding brake — 5 kW vertical axis with brake.
SGMSH-80ACA21: 7.5 kW, 17-bit incremental encoder, large frame, no brake — maximum-frame SGMSH for heavy industrial drives.
SGMSH-1AACA21: 11 kW, 17-bit incremental encoder, large frame, no brake — top-tier SGMSH output class for rolling mill axes.

Sourcing Hard-to-Find & Obsolete SGMSH Parts

The SGMSH series entered the mature/end-of-production phase as Yaskawa transitioned its primary servo platform to Sigma-V and Sigma-7. OEM production of many SGMSH variants has been discontinued, and lead times through standard distribution channels now extend to 16–52 weeks for certain frame sizes. DriveKNMS maintains a dedicated inventory of new-old-stock (NOS), refurbished, and tested-serviceable SGMSH units sourced through authorized secondary market channels.

For facilities operating SGMSH-based systems beyond the OEM support window, DriveKNMS provides: (1) direct unit replacement with tested stock, (2) encoder replacement and recalibration services, (3) holding brake inspection and replacement, and (4) cross-reference to compatible Sigma-V upgrade kits where full drive replacement is approved. All units ship with test certificates and 12-month warranty against defects in materials and workmanship.

Quality Control for the SGMSH Range

Each SGMSH unit processed by DriveKNMS undergoes a structured inspection protocol specific to the Sigma-II motor architecture:

Encoder integrity test: 17-bit encoder signal verification using a Yaskawa-compatible servo analyzer; A/B/Z channel output checked at rated speed.
Winding resistance and insulation test: Phase-to-phase resistance balance (±5% tolerance); insulation resistance ≥100 MΩ at 500 VDC megger test.
Holding brake test (TV11 variants): Static holding torque verified at 24 VDC nominal; release time measured against OEM specification.
Bearing noise and runout check: Shaft radial and axial runout measured with dial indicator; bearing noise assessed at no-load spin-up.
Thermal sensor continuity: PTC thermistor resistance verified within OEM specification range at ambient temperature.
Load simulation run-in: Units are coupled to a dynamometer and run at 50% and 100% rated torque for 30 minutes each; temperature rise and vibration signature logged.

Test records are retained for 3 years and available upon request for quality audit purposes.