LTi Drives LSH-050-2-45-320/T1 Servo Motor 4500 rpm

The LTi Drives LSH-050-2-45-320/T1 is a permanent magnet synchronous servo motor from the LSH series, a product family developed by LTi Drives for industrial motion applications. The motor is characterized by a rated torque of 0.53 Nm, a rated speed of 4500 rpm, a DC link voltage of 320 V and a rated current of 1.11 A. The ordering code describes the frame size, the number of pole pairs, the winding variant and the mechanical option fitted to the unit.

The LSH series is designed for use with LTi Drives servo controllers, including the Servo One platform and the CDA, CDB, CDD and CDE families. Because the motor and drive share compatible feedback and electrical characteristics, commissioning is simplified and the closed loop performance of the axis can be optimised using the drive tuning functions.

Product Overview

The LSH-050-2-45-320/T1 is a permanent magnet synchronous servo motor. It uses rare earth magnets in the rotor to produce high torque per unit volume, and it is designed for closed loop operation with a servo drive that provides current, velocity and position regulation. The motor windings are configured for a 320 V DC link voltage class, which corresponds to operation with a lower voltage supply through a servo drive with a matching rectifier front end.

The compact frame size and 0.53 Nm rated torque make this motor suitable for small axes where space is limited and where precise positioning at high speed is required. The motor is built for continuous industrial duty. The housing provides mechanical protection and supports heat dissipation from the stator windings. The shaft and flange dimensions follow standard mechanical interfaces, which allows the motor to be combined with couplings, pulleys, pinions and planetary gearboxes without special adapters.

Key Features and Functional Highlights

The motor is designed for smooth torque output and low cogging, which improves low speed performance and reduces vibration. This is important in applications such as feeding, indexing and positioning where the axis must move slowly and precisely. The rotor construction supports high acceleration, allowing the axis to reach commanded speed quickly during dynamic cycles. The 4500 rpm rated speed also makes the motor suitable for high speed applications where a small tool or roller must rotate quickly.

The motor includes a temperature sensor, typically a thermistor or PT100 element, which allows the drive to monitor winding temperature and protect the motor from overload. The feedback device provides rotor position information to the drive so that commutation and position control can be performed accurately. Feedback options in the LSH series include resolver and encoder types, and the specific device fitted to a given motor is defined by the ordering code.

The motor housing is designed for effective heat dissipation, with a ribbed or smooth surface depending on the variant. The connection arrangement determines whether power and feedback cables are routed through connectors or terminal boxes and how the cables exit the motor. This affects installation in tight machine spaces where cable routing must be planned carefully.

Technical Specifications

The LSH-050-2-45-320/T1 has a rated torque of 0.53 Nm at a rated speed of 4500 rpm, with a DC link voltage of 320 V and a rated current of 1.11 A. These values define the continuous operating point of the motor. Peak torque is higher than rated torque and is available for short periods during acceleration, subject to the thermal limits of the winding. Winding resistance, winding inductance and rotor inertia are defined by the motor data sheet and must be respected during commissioning.

Mechanical data includes flange dimensions, shaft diameter, shaft length, permissible radial and axial loads, and the degree of protection of the housing. These values determine how the motor can be mounted and what loads the bearings can accept. Thermal data includes the permissible winding temperature and the thermal time constant, which together define how long the motor can operate at overload before the temperature limit is reached.

Performance and Advantages

Permanent magnet servo motors provide high torque density and fast dynamic response compared with induction motors of similar frame size. This allows machine designers to achieve the required acceleration with a smaller and lighter motor, which reduces moving mass on the axis and can improve overall machine dynamics. Smooth torque output also reduces audible noise and mechanical wear in the transmission.

Because the motor is designed for use with LTi Drives controllers, the electrical and feedback interfaces are compatible and commissioning data is readily available. The motor can be combined with a planetary gearbox to increase output torque and reduce speed, or used directly on the load in a direct drive arrangement where high stiffness and zero backlash are required.

Application Areas

The LSH-050-2-45-320/T1 is used in machine tools for small feed and auxiliary axes, in packaging machinery for film feed, cutting and sealing stations, in handling systems for pick and place and lightweight gantry axes, and in printing and converting equipment for register and tension control. It also appears in textile machinery, laboratory automation, medical equipment and general automation systems where compact dimensions, high speed and precise positioning are required.

Installation and Commissioning

Installation begins with verifying the motor ratings against the load requirements. The motor is mounted to the machine structure or to a gearbox input flange using the specified fasteners and torque values. Alignment between the motor shaft and the driven element must be maintained to avoid additional radial loads on the bearings. A suitable coupling, pulley or pinion is fitted to the shaft using the correct method for the shaft design.

Electrical connections include the motor power cable and the feedback cable. Shielded cables should be used, with shields bonded to ground at both ends over a large contact area. The motor temperature sensor is connected to the drive so that thermal protection is active. Commissioning includes verifying the feedback direction, entering the motor data into the drive, and tuning the current, velocity and position loops. A test run at reduced speed confirms correct rotation and mechanical alignment.

Maintenance and Diagnostics

Maintenance consists of checking mounting fasteners for tightness, inspecting cables and connectors for damage, and verifying that the motor is free from excessive vibration or temperature rise. The bearings are lubricated for life under normal conditions, but replacement may be required after extended service or in high speed applications. The drive diagnostic functions can be used to monitor following error, current and temperature during operation.

System Integration and Compatibility

The motor is designed for use with LTi Drives servo controllers. It can be combined with the Servo One platform or with the CDA, CDB, CDD and CDE families, depending on the power and interface requirements of the application. Compatibility depends on the motor winding, the feedback type and the mechanical interface, all of which are defined by the ordering code.

Selection Guidance

When selecting this motor, the key considerations are continuous and peak torque, rated speed, rotor inertia, feedback type, flange and shaft dimensions, degree of protection and available mounting space. The LSH-050-2-45-320/T1 with 0.53 Nm, 4500 rpm and 1.11 A suits compact axes that require high speed and accurate positioning with low moving mass. Engineers should confirm motor ratings against the load cycle and verify that the selected drive can supply the required current before finalising the selection.

Conclusion

The LTi Drives LSH-050-2-45-320/T1 permanent magnet servo motor is a compact, high speed motor designed for industrial positioning and feed axes. Its 0.53 Nm torque, 4500 rpm rated speed, 320 V DC link voltage and 1.11 A rated current suit a wide range of small motion tasks, while its integrated temperature sensing and flexible feedback options support accurate closed loop control when paired with a compatible LTi Drives servo controller. For engineers designing or maintaining compact axes, this motor remains a practical and well understood choice.