SEM HD55C4-32S Brushless Servo Motor

Description

Key Technical Specifications

The HD55C4-32S appears in SEM/Parker servo motor documentation as part of the HDY55C4-32S family, with published motor data including 0.4 Nm continuous stall torque, 1.1 A stall current, 0.375 Nm/A torque constant, 24 kg·mm² rotor inertia, and approximately 1.4 kg mass.

Specification note: Different market listings identify the same motor family under SEM, FTM Technologies, and related HDY documentation. Always confirm the actual nameplate, winding code, and feedback configuration before replacement.

Product Introduction

The SEM HD55C4-32S is a compact high-dynamic brushless servo motor designed for closed-loop industrial motion applications. The motor belongs to the HD55 series and is listed with an 8,000 RPM speed rating, 260 V operating voltage, and 6.1 A current specification.

Its low rotor inertia and compact frame design make it suitable for applications requiring frequent acceleration and deceleration cycles, including precision assembly equipment, robotics, and automated machinery. Before installation, verify the servo amplifier compatibility, feedback type, and mechanical dimensions.

HD55C4-32S

HD55C4-32S

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation — 10 minutes

⚠️ Safety First: Disconnect the servo amplifier power supply and isolate the machine before removing the motor. Confirm the DC bus has discharged according to the drive manufacturer’s safety procedure.

Tools Required:

• ESD wrist strap
• Insulated multimeter
• Screwdrivers
• Cable labels
• Smartphone/camera
• Mechanical alignment tools

Data Backup:

1. Record the complete motor nameplate information.
2. Confirm the model: SEM HD55C4-32S.
3. Photograph motor power and feedback connectors.
4. Record the servo amplifier model.
5. Save existing drive parameters.
6. Photograph coupling alignment and mounting position.
7. Record cable routing before removal.

Stage 2: Removing the Old Motor — 10–15 minutes

1. Lock out machine power.
2. Verify no hazardous voltage remains.
3. Disconnect the motor power cable.
4. Disconnect the encoder/resolver feedback cable.
5. Label all connections before removal.
6. Remove the mechanical coupling.
7. Support the motor weight.
8. Remove mounting bolts.
9. Pull the motor straight out from the mounting surface.
10. Inspect the shaft, flange, and coupling.

⚠️ Avoid impact on the shaft or feedback housing. Servo motors contain precision bearings and feedback components that can be damaged by mechanical shock.

Stage 3: Installing the Replacement — 10 minutes

1. Verify the replacement motor marking is HD55C4-32S.
2. Compare:
   • Shaft diameter
   • Shaft length
   • Flange dimensions
   • Connector type
   • Feedback configuration
3. Check motor winding compatibility with the servo amplifier.
4. Install the motor into the machine mounting position.
5. Align the coupling carefully.
6. Tighten mounting hardware evenly.
7. Connect motor power wiring.
8. Connect feedback wiring.
9. Confirm cable strain relief.
10. Verify grounding requirements.

Self-Checklist:

• Correct motor model verified
• Voltage/current checked
• Feedback type confirmed
• Coupling aligned
• Power wiring checked
• Feedback connector secured
• Mechanical mounting completed

Stage 4: Power-On & Testing — 10–20 minutes

1. Verify the servo drive parameters before enabling motion.
2. Confirm motor identification settings.
3. Power up the servo amplifier.
4. Check alarm status.
5. Verify encoder/resolver feedback.
6. Perform a low-speed jog.
7. Confirm rotation direction.
8. Monitor current draw.
9. Check vibration and abnormal noise.
10. Increase speed gradually.
11. Run a controlled machine test cycle.

⚠️ Do not immediately command maximum speed after replacement. A wrong feedback setting or incorrect motor parameter can cause uncontrolled movement or servo alarms.

Replacement Compatibility Warning

The HD55C4-32S should be replaced only after checking:

• Servo amplifier model
• Motor winding configuration
• Feedback device type
• Connector wiring
• Shaft dimensions
• Flange dimensions
• Motor parameters stored in the drive

The HD55 family contains multiple variants. Similar model names do not guarantee electrical compatibility.

Frequently Asked Questions (FAQ)

What is the SEM ?

The SEM is a compact brushless servo motor from the HD55 series used for industrial motion-control applications. Available supplier records list it as an 8,000 RPM, 260 V, 6.1 A servo motor.

Is the SEM still manufactured?

The model is generally treated as a legacy/discontinued motor. Current industrial suppliers list it mainly as surplus or repair-supported inventory rather than a standard current-production item.

What is the rated speed of ?

Supplier listings identify the motor with an 8,000 RPM speed rating. Actual operating speed depends on the servo amplifier, load inertia, and machine application.

What are the voltage and current ratings?

The commonly published values are 260 V and 6.1 A. Confirm the physical motor label before commissioning because legacy SEM motors may have different winding variants.

Can I replace with another HD55 motor?

Not automatically. The series includes different winding and performance variants. Check the complete motor code, feedback system, and amplifier parameters before substitution.

Does use an encoder?

The motor family uses feedback for closed-loop servo operation. The exact feedback device should be verified from the motor label and connector configuration before replacement.

What should I request when purchasing a used ?

Request:

• Actual motor photographs
• Nameplate image
• Serial number
• Running test report
• Feedback verification
• Shaft inspection results
• Stated condition: New Original, New Surplus, Used Tested, or Refurbished

For discontinued servo motors, these details are important because two visually identical units may have different internal configurations.