MPL-B330P-HJ72AA Servo Motor

1. Product Overview

The MPL-B330P-HJ72AA is a low-inertia brushless AC servo motor designed for high-speed industrial motion-control applications.

It belongs to the MPL Series of low-inertia servo motors and is designed for applications requiring rapid acceleration and deceleration, accurate positioning, repeatable motion, and stable closed-loop control.

This particular model uses a 400 V class electrical design, a 100 mm frame size, a 76.2 mm magnetic stack length, a 5000 rpm rated speed, and a 2000-line incremental encoder.

The motor is equipped with a keyed shaft, a right-angle SpeedTEC DIN connector, and no holding brake.

With a continuous output torque of approximately 4.18 N·m, peak torque of approximately 11.1 N·m, and continuous rated power of approximately 1.8 kW, the motor is suitable for a wide range of automated machinery where fast and precise rotary movement is required.

2. Brand and Product Series

3. Main Technical Specifications

4. Dimensions and Weight

The MPL-B330P-HJ72AA uses a 100 mm frame and a 76.2 mm magnetic stack.

The 100 mm frame size is an important mechanical reference when determining whether the motor can fit into an existing machine.

The 76.2 mm magnetic stack corresponds to a 3-inch stack length and identifies the motor’s electromagnetic construction within the MPL family.

5. Product Description

The MPL-B330P-HJ72AA is a compact, high-speed servo motor designed for automated machinery and precision motion systems.

Unlike a conventional fixed-speed motor, this servo motor is designed to operate as part of a closed-loop control system.

The motor receives controlled electrical power from a servo drive while its encoder continuously provides position information.

The controller can use this feedback to regulate motor position, velocity, and torque.

This makes the motor suitable for machinery where the motor must repeatedly move to precise positions rather than simply operate at a fixed speed.

6. Low-Inertia Motor Design

The low-inertia design is one of the key characteristics of the MPL Series.

Motor inertia affects the amount of effort required to accelerate or decelerate the rotor.

A low-inertia motor can change speed quickly, making it particularly useful for applications involving frequent starts, stops, reversals, and indexing movements.

For example, a machine may require the motor to:

1. Accelerate rapidly.
2. Reach operating speed.
3. Decelerate quickly.
4. Stop at a specific position.
5. Reverse direction.
6. Repeat the cycle continuously.

The low-inertia design helps the servo system respond efficiently to this type of motion profile.

7. High-Speed Performance

The MPL-B330P-HJ72AA is rated for approximately 5000 rpm.

This relatively high operating speed makes it suitable for machinery where rapid rotary movement is required.

Typical high-speed applications include:

• High-speed indexing
• Feeding mechanisms
• Packaging machinery
• Automated assembly
• Rotary positioning
• Material handling
• High-cycle production equipment

8. Torque Characteristics

The motor provides approximately:

• 4.18 N·m continuous torque
• 11.1 N·m peak torque

The continuous torque represents the motor’s ability to provide sustained torque under appropriate operating conditions.

Peak torque is important when the machine requires short-duration increases in torque, such as during acceleration, rapid deceleration, or temporary load changes.

The actual torque available in a machine depends on the servo drive, operating speed, ambient conditions, load characteristics, and the complete motion profile.

9. Encoder and Feedback System

The MPL-B330P-HJ72AA uses a 2000-line incremental encoder.

The encoder provides feedback information to the servo drive and motion controller.

This feedback allows the control system to determine motor position and movement.

The encoder resolution is:

2000 lines per revolution

The feedback system is important for:

• Position control
• Speed control
• Motion synchronization
• Repeatable positioning
• Error detection
• Closed-loop operation

10. Advantages of Incremental Encoder Feedback

The incremental encoder provides the servo system with high-resolution movement information.

When the motor rotates, the encoder generates electrical pulses corresponding to the movement of the shaft.

The servo system processes these signals to determine movement and position relative to the reference point.

This makes the motor suitable for automated machinery where repeatable positioning is required.

Applications can include:

• Indexing
• Pick-and-place
• Automated assembly
• Machine-axis movement
• Feeding
• Rotary positioning
• Packaging

11. Keyed Shaft Design

The MPL-B330P-HJ72AA uses a keyed shaft configuration.

A keyed shaft provides a mechanical interface for suitable couplings, pulleys, gears, or other transmission components.

The key helps transmit torque between the motor shaft and the connected mechanical component.

When installing the motor, the shaft coupling should be correctly aligned.

Incorrect alignment can produce excessive radial or axial loading, vibration, bearing wear, and reduced service life.

12. Connector Configuration

The motor uses a SpeedTEC DIN connector.

The connector is configured in a right-angle arrangement and can be rotated through approximately 180 degrees.

This provides additional flexibility when routing cables inside a machine.

13. No-Brake Configuration

The MPL-B330P-HJ72AA is a no-brake servo motor.

This means the motor does not include an integrated holding brake for mechanically locking the shaft when power is removed.

The no-brake design is appropriate for many horizontal-axis applications where the mechanical load does not need to be held by a motor-mounted brake.

Typical applications include:

• Horizontal positioning
• Rotary indexing
• Conveyor mechanisms
• Packaging machines
• Automated assembly
• Non-gravity-loaded axes

14. Important Consideration for Vertical Axes

Because this model does not include a holding brake, special consideration should be given when applying it to vertical axes.

If the machine has a suspended load, gravity can cause movement when motor torque is removed.

In such applications, the machine may require a separate mechanical holding solution or a motor configuration with an appropriate brake.

The brake requirement should therefore be determined during the machine-design stage rather than after installation.

15. Product Applications

15.1 Automated Assembly Equipment

The motor can be used in assembly equipment requiring fast and repeatable rotary or linear positioning.

Typical functions include:

• Component positioning
• Part insertion
• Rotary indexing
• Feeding
• Press mechanisms
• Assembly-axis movement

15.2 Packaging Machinery

Packaging machinery frequently requires high-speed repetitive movement.

The MPL-B330P-HJ72AA can be used for:

• Product feeding
• Indexing
• Cutting mechanisms
• Label positioning
• Packaging alignment
• Film handling
• Rotary mechanisms

15.3 Material Handling

The servo motor can control automated material-handling mechanisms.

Possible applications include:

• Conveyor positioning
• Transfer mechanisms
• Automated loading
• Pick-and-place equipment
• Rotary transfer systems

15.4 Machine Tools

Servo motors are commonly used for controlled machine-axis movement.

Possible applications include:

• Feed axes
• Positioning mechanisms
• Automated tool movement
• Rotary positioning
• Material feeding

15.5 Inspection Equipment

Precision inspection equipment often requires stable movement.

The motor can be used to control:

• Inspection stages
• Camera positioning
• Sensor movement
• Workpiece rotation
• Measurement mechanisms

15.6 Printing and Converting Machinery

High-speed servo motors are useful in equipment requiring synchronized movement.

Potential applications include:

• Web handling
• Roller positioning
• Feeding
• Cutting
• Registration control
• Tension-related motion systems

16. Main Product Advantages

16.1 High-Speed 5000 rpm Operation

The 5000 rpm speed rating makes the motor suitable for high-cycle machinery.

This can be beneficial when the machine requires rapid movement or short cycle times.

16.2 Low Rotor Inertia

The low-inertia rotor helps the motor respond rapidly to changes in commanded speed.

This is particularly useful for machines with frequent acceleration and deceleration.

16.3 High Peak Torque

The approximately 11.1 N·m peak torque capability provides additional torque capacity for short-duration acceleration and dynamic movements.

16.4 Compact 100 mm Frame

The 100 mm frame provides a relatively compact package for the available motor performance.

This is useful when machine installation space is limited.

16.5 Incremental Encoder Feedback

The 2000-line incremental encoder provides detailed feedback for closed-loop servo control.

16.6 Keyed Shaft

The keyed shaft provides a conventional mechanical connection for suitable couplings and transmission components.

16.7 Flexible Connector Orientation

The rotatable right-angle connector provides greater flexibility when installing cables in compact machinery.

16.8 Suitable for Multi-Axis Motion

Servo motors of this type can be used in multi-axis systems where multiple motors need to operate according to coordinated motion commands.

17. Working Principle

The motor normally operates through the following control sequence:

Motion Command → Controller → Servo Drive → Motor → Mechanical Load → Encoder Feedback → Controller

The controller generates a desired position, speed, or torque command.

The servo drive processes the command and supplies controlled electrical current to the motor.

The motor generates torque and rotates the shaft.

The encoder detects the shaft movement and sends feedback information back to the control system.

The controller compares the commanded movement with the actual movement and continuously adjusts motor operation.

This feedback loop allows the machine to achieve precise and repeatable motion.

18. Servo Motor Versus Conventional Motor

19. Electrical and Mechanical Parameters

20. Five Related Models in the MPL Series

The following models are closely related MPL Series servo motors. They cover similar low-inertia motion-control applications but differ in frame size, torque capacity, power, stack length, or configuration.

These models are related rather than automatically interchangeable.

The correct replacement should always be selected according to the required torque, speed, feedback, shaft configuration, brake requirement, mounting dimensions, drive compatibility, and machine load.

21. Five Additional Models from the Same Brand

The following models provide additional options within the broader servo-motor range.

These models are useful for comparing motor capacity within the same low-inertia servo family.

The MPL-B310P is suitable for lower torque requirements, while the MPL-B420P and MPL-B430P provide higher torque capacity.

22. Motor Capacity Comparison

23. Selection Recommendations

The MPL-B310P is appropriate when the machine requires a smaller motor and relatively low continuous torque.

The MPL-B320P is suitable when more torque is required while maintaining a compact servo configuration.

The MPL-B330P-HJ72AA provides a useful balance between size, speed, torque, and power for medium-capacity precision motion applications.

The MPL-B420P provides additional torque capacity for applications where the MPL-B330P class is insufficient.

The MPL-B430P is suitable for applications requiring still higher torque while retaining high-speed operation.

24. Applications by Machine Type

25. Maintenance Considerations

Regular inspection can help maintain stable servo performance.

The motor body should be checked for abnormal temperature, vibration, or noise.

The shaft and coupling should be checked for mechanical alignment.

The feedback cable should be inspected for damage, loose connections, or excessive bending.

The motor connector should remain firmly secured.

The machine load should also be monitored because unexpected increases in mechanical resistance can result in higher motor current and increased temperature.

Recommended inspection items include:

26. Installation Considerations

The motor should be mounted on a mechanically rigid surface.

The mounting flange should be correctly aligned with the machine.

The keyed shaft should be installed with an appropriate coupling or transmission component.

The coupling should be aligned carefully to avoid excessive radial and axial loads.

The motor connector should be positioned so that the cable is not subjected to unnecessary bending or mechanical stress.

Because the MPL-B330P-HJ72AA does not have an integrated brake, vertical-axis applications require additional consideration for load holding.

The servo drive must also be compatible with the motor’s voltage class and feedback system.

27. Important Replacement Checklist

Before purchasing or installing an MPL-B330P-HJ72AA, check the following:

28. Key Product Advantages at a Glance

29. Product Summary

The MPL-B330P-HJ72AA is a 100 mm-frame, low-inertia brushless AC servo motor designed for high-speed industrial motion control.

Its main performance characteristics include a 5000 rpm rated speed, 4.18 N·m continuous torque, 11.1 N·m peak torque, and 1.8 kW continuous rated power.

The motor uses a 76.2 mm magnetic stack, a 2000-line incremental encoder, and a keyed shaft. Its connector is a right-angle SpeedTEC DIN type with 180° rotation capability.

The motor does not include an integrated brake, making it especially suitable for horizontal-axis and other applications where an integrated holding brake is not required.

With an approximate weight of 4.6 kg and a 100 mm frame, it offers a compact solution for automated machinery requiring fast and accurately controlled movement.

The MPL-B330P-HJ72AA can be used in packaging equipment, assembly machinery, inspection systems, material-handling equipment, machine tools, printing machinery, indexing systems, and other automated production equipment.

When selecting this motor as a replacement, the most important items to verify are the voltage class, feedback configuration, continuous and peak torque requirements, operating speed, shaft dimensions, mounting dimensions, connector arrangement, mechanical load, inertia ratio, duty cycle, and brake requirement.

For applications requiring a similar motor with different capacity, the MPL-B310P, MPL-B320P, MPL-B420P, and MPL-B430P families provide useful comparison points. The final selection should be based on the complete machine requirements rather than motor size alone.