SZGH-13150AC — 1500W High-Inertia AC Servo Motor

The SZGH-13150AC is a 1500W high-inertia AC servo motor engineered for applications that combine large mechanical loads with the need for precise, stable motion control. With a rated torque of 10Nm, peak torque of 25Nm, and a rotor inertia of 19.4×10⁻⁴ kg·m², the 13150AC belongs to SZGH's high-inertia servo motor class — designed to drive loads with substantial mass, long moment arms, or high-resistance mechanisms where a standard servo motor would experience instability, oscillation, or torque insufficiency under dynamic load changes.

At a rated speed of 1500 RPM with 10Nm continuous torque, the 13150AC delivers the sustained, smooth torque output required by industrial sewing machine drives, textile equipment, packaging machines, and any precision application where the load-to-motor inertia ratio demands a high-inertia rotor to maintain velocity stability. The motor is compatible with SZGH's S4T series spindle servo drivers, forming a matched motor-driver combination that SZGH supplies, assembles, and supports as a single-source kit.

Key Specifications

Pricing

For OEM quantities or bundled motor + driver kit pricing, contact SZGH directly.

What "High-Inertia" Means — and When It Matters

Servo motor inertia is a frequently misunderstood selection criterion. In most light-duty automation applications — small robotic joints, label applicators, conveyors with minimal mass — a low-inertia servo motor delivers faster acceleration and higher dynamic response. But when the driven load has high inertia of its own (heavy platens, large flywheels, long fabric rolls, dense fabric layers in sewing applications, or mechanical presses with substantial reciprocating mass), a low-inertia motor creates a load-to-motor inertia mismatch that causes the servo drive to oscillate, overshoot, or lose stable control during speed transitions.

The SZGH-13150AC addresses this by using a rotor with higher inherent inertia (19.4×10⁻⁴ kg·m²), which:

• Reduces the load-to-motor inertia ratio — bringing the combined system closer to the 1:1 to 5:1 ratio that servo amplifiers can control stably without extensive gain tuning

• Provides smoother velocity response under sudden load changes, such as the needle penetrating dense fabric in an industrial sewing machine, or a packaging machine encountering product density variation

• Maintains speed stability at low RPM — the higher rotor mass acts as a mechanical flywheel, damping the micro-velocity fluctuations that cause surface finish problems in cutting applications or stitch irregularities in sewing applications

• Reduces vibration transmission to the driven mechanism, which is particularly important in precision stitching equipment where velocity ripple at the needle directly affects seam quality

For standard CNC axis servo applications with well-matched ballscrew and slide inertia, the CNC1000TDc series servo motors are the appropriate choice. The 13150AC is specified when the driven load profile specifically benefits from a high-inertia rotor.

Primary Applications

Industrial Sewing Machine Drives

The most common application for the 13150AC. Industrial sewing machines — particularly long-arm machines, heavy-material stitching equipment, and multi-needle bar machines — present high and variable resistance loads at the needle drive shaft. The 10Nm rated torque and 25Nm peak torque of the 13150AC provide sufficient reserve to maintain constant needle speed through heavy fabric layers, seam crossings, and directional reversals without speed dip or stitch spacing irregularity. The high rotor inertia smooths the cyclic load variation inherent in reciprocating needle mechanisms.

Textile and Fabric Processing Equipment

Winding, unwinding, tensioning, and feeding mechanisms in knitting machines, weaving equipment, and fabric inspection lines often drive large rolls with significant rotational inertia. The 13150AC's high-inertia rotor and 10Nm continuous torque support stable web tension control and smooth roll acceleration and deceleration profiles required in tension-sensitive textile applications.

Packaging Machinery

Form-fill-seal machines, wrapping equipment, and case packers frequently combine high-inertia film rolls with high-speed intermittent motion cycles. The 25Nm peak torque of the 13150AC provides the acceleration torque needed for fast index moves, while the high-inertia rotor stabilizes velocity during the constant-speed dwell phases.

Large-Load Precision Equipment

Any application pairing a large driven mass with a positioning or speed control requirement — rotary tables on large machine tools, heavy-duty conveyor indexers, or precision turntable drives — can benefit from the 13150AC's torque-inertia combination when load analysis indicates that standard servo inertia ratios are exceeded.

Compatible Driver — SZGH-S4T1P5

The recommended matched driver for the SZGH-13150AC is the SZGH-S4T1P5 — SZGH's 1.5kW spindle servo driver from the S4T series. The S4T1P5 is rated for 1.5kW motor power and 3.5A rated current output, matching the 13150AC's 1500W / 6.0A rated current specification within the S4T series selection table.

Key S4T1P5 specifications relevant to 13150AC pairing:

For high-inertia load applications — particularly sewing machine drives with frequent start-stop cycles — SZGH recommends verifying the brake resistor specification against the actual deceleration duty cycle. The S4T1P5's 0.5kW / 75Ω brake resistor is the standard recommendation; applications with very frequent or fast deceleration from 1500 RPM may require a higher-duty brake resistor assembly.

View SZGH-S4T1P5 and S4T Series Spindle Servo Drivers →

Motor + Driver Kit — Single-Source Supply

SZGH designs and manufactures both the 13150AC servo motor and the S4T series servo driver. Ordering the motor and driver as a matched SZGH kit provides:

• Pre-confirmed compatibility — motor and driver are selected and tested against each other's specifications before shipment; no compatibility uncertainty

• Single wiring reference — SZGH provides the motor-to-driver wiring diagram as part of the kit documentation, covering power connections, encoder feedback wiring, and control signal connections

• Single support contact — any commissioning question, parameter setting issue, or fault diagnosis is handled by SZGH's engineer team with direct knowledge of both components; no "the problem is in the other manufacturer's product" situation

• Spare parts from one source — replacement encoder, motor cable, or driver module sourced from the same factory that supplied the original

To request a motor + driver kit quotation (including brake resistor and cable if required), contact SZGH with your machine type and duty cycle.