HF Series vs. HG Series: Which Mitsubishi Motor is Right for You?

Mitsubishi Electric is a leading manufacturer of industrial automation products, including servo motors. They offer a wide range of servo motors to meet the needs of a variety of applications. Two of their most popular series are the HF and HG series.

The HF series features a low-inertia servo motor well-suited for various applications. It is available in a variety of power ratings and speeds, and it can be used with a variety of encoders and control options. The HF series is a good choice for applications that require high performance and reliability. The HG Series by Mitsubishi features medium inertia servo motors with significantly improved sensor resolution. These motors excel in delivering high accuracy, smooth rotation, and outstanding acceleration. Specifically designed for use as feed axes in machine tools, the HG Series ensures precision in machining processes and provides swift and accurate movements, setting a new standard for industrial automation performance. To assess which motor will prove best for your specific application, a review of important features is essential, which is presented here.

Mitsubishi HF Series Servo Motors Technical Specifications

The Mitsubishi HF Series Servo Motors encompass a range of models tailored to specific industrial needs. The HF-MP Series, characterized by its ultra-low inertia and small capacity, boasts a rated speed of 1000 revolutions per minute (r/min) and an encoder resolution of 262144 pulses per revolution. With a rated output ranging from 0.05 to 0.75 kW, this series operates on a single-phase 200 to 230V AC power supply. Notably, it features compatibility with electromagnetic brakes, availability of special shafts, optional reduction gears, and comes equipped with an absolute encoder.  It adheres to overseas standards, including EN Standard and UL/cUL Standard, and holds an IP65 rating for protection. The motors operate with rated speeds up to 3000 r/min, with a maximum speed of 6000 r/min. Instantaneous permissible speed reaches up to 6900 r/min. The maximum torque, varying with rated output, is achieved with power rates at continuous rated torque ranging from 13.3 kW/s to 95.5 kW/s

Moving on to the HF-KP Series, designed for applications with low inertia and small capacity requirements, it offers a rated speed of 1500 r/min with the same encoder resolution of 262144 pulses per revolution. The rated output spans from 0.05 to 0.75 kW, and the servo motor operates on a three-phase 200 to 230VAC power supply. Similar to the HF-MP Series, it features compatibility with electromagnetic brakes, availability of special shafts, optional reduction gears, and comes with an absolute encoder. Compliance with overseas standards, including EN Standard and UL/cUL Standard, is ensured, and the series is assigned an IP65 rating for protection against environmental elements.

The HF-SP Series caters to applications demanding medium inertia and medium capacity. With a rated speed of 2000 r/min and an encoder resolution of 262144 pulses per revolution, this series offers a rated output ranging from 0.5 to 7.0 kW. Operating on a three-phase 380 to 480V AC power supply, the HF-SP Series maintains compatibility with electromagnetic brakes, offers special shaft options, and allows for the integration of optional reduction gears. An absolute encoder is included, and the series complies with overseas standards such as EN Standard and UL/cUL Standard. Notably, it boasts an IP67 rating for superior protection against the intrusion of solids and liquids.

Environmental Conditions for Mitsubishi HF Series Servo Motors

Mitsubishi HF Series Servo Motors are designed to operate within specific environmental conditions to ensure consistent and reliable performance. During operation, the ambient temperature should be maintained between 0 to 40 degrees Celsius (32 to 104 degrees Fahrenheit) to prevent freezing, while storage temperature should range from 15 to 70 degrees Celsius (5 to 158 degrees Fahrenheit). Humidity levels during operation and storage should be within 10 to 80% RH and 10 to 90% RH, respectively, with both conditions being non-condensing.

These servo motors are intended for indoor use without direct exposure to sunlight and should be placed in environments free from corrosive gases, flammable gases, oil mist, dust, and dirt. The permissible altitude for optimal operation is up to 1000 meters above sea level. Regarding vibration resistance, the motors exhibit resilience with an X, Y: 49 m/s² acceleration, highlighting their capability to withstand mechanical stresses. Adhering to these environmental specifications is crucial to maintaining the longevity, efficiency, and performance integrity of Mitsubishi HF Series Servo Motors across various industrial applications.

Mitsubishi HG Series Servo Motors

HG-KN Series Servo Motors Technical Specifications

The HG-KN Series Servo Motors, efficiently engineered for applications with low inertia and small capacity requirements, offers precision and performance across various models. All models within this series, namely HG-KN 13(B) J, HG-KN 23(B) J, HG-KN 43(B) J, and HG-KN 73(B) J, encompass versatile features. These servo motors integrate with compatible servo amplifiers. Each model in the series boasts different power supply capacities ranging from 0.3 to 1.3 kVA, ensuring flexibility for diverse applications. The continuous running duty, coupled with rated outputs ranging from 100W to 750W, underscores the reliability and versatility of these servo motors. With rated speeds at 3000 r/min and maximum speeds reaching 5000 r/min, the HG-KN series provides dynamic and responsive performance.

The series caters to varying torque requirements, offering rated torque values from 0.32 Nm to 2.4 Nm and maximum torque values from 0.95 Nm to 7.2 Nm. The power rate at continuous rated torque, both standard and with an electromagnetic brake, is specified for each model. These servo motors feature recommended load-to-motor inertia ratios of 15 times or less, ensuring optimal operation in diverse scenarios. Equipped with an incremental 17-bit encoder for precise speed and position detection (resolution: 131072 pulses/rev), the HG-KN Series is designed with attention to detail. Including an installed oil seal, with the option for operation without it, adds to the adaptability of these motors. The insulation class of 130(B) and the structure’s total enclosure for natural cooling with an IP rating of IP65 further enhance the reliability and durability of the HG-KN Series Servo Motors.

HG-SN Series Servo Motors Technical Specifications

The HG-SN Series Servo Motors stand as a technological marvel, crafted for applications requiring medium inertia and medium capacity. This series encompasses multiple models, including HG-SN 52(B) J, HG-SN 102(B) J, HG-SN 152(B) J, HG-SN 202(B) J, and HG-SN 302(B) J, each tailored to meet specific industrial demands. Aligned with MR-JE Amplifiers, these servo motors exhibit a range of power supply capacities varying from 1.0 to 4.8 kVA, providing adaptability for diverse operational requirements. With continuous running duty, these motors deliver rated outputs ranging from 0.5 kW to 3.0 kW, accompanied by rated torque values spanning 2.39 Nm to 14.3 Nm, ensuring optimal performance across the model spectrum.

The versatility of the HG-SN Series is evident from its rated speed of 2000 r/min and maximum speeds reaching up to 3000 r/min for selected models. Instantaneous speeds are permissible within the range of 3450 to 2875 r/min, showcasing the dynamic responsiveness of these motors. The rated power at continuous rated torque is meticulously specified for each model, both in standard conditions and with an electromagnetic brake. Regenerative braking frequency is critical to dynamic performance and depends upon the model. The moment of inertia is a key consideration for precision and control and is outlined for standard conditions and configurations featuring an electromagnetic brake. These servo motors are equipped with an incremental 17-bit encoder, boasting a resolution of 131072 pulses/rev for precise speed and position detection. Including an installed oil seal adds to the reliability of these motors. At the same time, the insulation class of 155 (F) and a structure featuring a total enclosure for natural cooling (with an IP rating of IP67) underscore their robust design for varied industrial environments.

Environmental Conditions for HG Series Servo Motors

The operational capabilities of Mitsubishi HG Series Servo Motors are precisely defined by their environmental specifications. Designed to perform flawlessly in a controlled temperature range of 0°C to 40°C during operation and -15°C to 70°C in storage, these servo motors ensure non-freezing conditions. Maintaining humidity levels at 80% RH or less during operation and 90% RH or less in storage, the HG Series is built for reliable and consistent performance.

In terms of ambiance, these servo motors are intended for indoor use without direct exposure to sunlight. Furthermore, the operating environment should be free from corrosive gases, flammable gases, oil mist, dust, and dirt. The altitude range for optimal performance is specified to be a maximum of 1000 meters above sea level. A key aspect of the technical specifications is the vibration resistance, which varies among different models within the HG Series. Ranging from X, Y: 49 m/s² for HG-MR/HG-KR Series to X: 24.5 m/s², Y: 29.4 m/s² for HG-SR301/HG-SR421/HG-SR502/HG-SR702.  These specifications underscore the robust design of the HG Series, making it capable of withstanding mechanical stresses and ensuring superior performance across a spectrum of industrial applications.

Mitsubishi HF Series vs. HG Series Servo Motors: A Comparative Analysis

General Overview

In industrial automation, Mitsubishi Electric introduces two distinct series of servo motors, each catering to specific needs and applications. The HF Series is characterized by its versatility, offering low-inertia servo motors with a broad spectrum of applications in mind. On the other hand, the HG Series takes a precision-focused approach, featuring medium inertia servo motors meticulously engineered for applications demanding a balance of accuracy and power. These series represent Mitsubishi Electric’s commitment to providing tailored solutions for a diverse range of industrial requirements.

Power and Speed

When comparing the power and speed attributes, Mitsubishi’s HF Series distinguishes itself by providing a comprehensive range of power ratings and speeds. This versatility makes it well-suited for a variety of industrial applications where different power requirements and speeds may be necessary. In contrast, the HG Series takes a precision-oriented approach, emphasizing lower-rated speeds. This focus on precision makes the HG Series ideal for applications where accuracy is the first priority, even if it means sacrificing some speed in the process. The choice between the two series hinges on the specific demands of the application, whether it prioritizes adaptability or precision.

Power Supply

When it comes to power supply compatibility, the Mitsubishi HF Series demonstrates versatility by operating on both single-phase and three-phase power supplies. This flexibility allows for adaptation to various power configurations, enhancing its suitability for diverse industrial settings. In contrast, the HG Series mandates a three-phase power supply. While this may limit its compatibility with certain power configurations, it could be advantageous in applications where the benefits of three-phase power are essential. The choice between the two series depends on the specific power infrastructure of the industrial environment in question.

Common Features

Both the Mitsubishi HF Series and HG Series share several common features that contribute to their robust performance in industrial applications. Firstly, they are equipped with an incremental 17-bit encoder, ensuring precise speed and position detection. This feature enhances the accuracy and control of the servo motors in various operational scenarios. Secondly, both series are designed with the inclusion of an installed oil seal. This feature adds an additional layer of reliability to the motors, protecting internal components from potential contaminants and environmental factors, thereby contributing to their longevity and efficiency.

Thirdly, both series adhere to international standards, including compliance with EN Standard and UL/cUL Standard. This ensures that the servo motors meet established safety and performance criteria, providing users with confidence in their reliability and adherence to industry standards.

Environmental Ratings

In terms of environmental ratings, both the Mitsubishi HF Series and HG Series demonstrate robust designs suitable for industrial environments. The HF Series, with its different models, holds IP65 ratings for specific configurations (HF-MP and HF-KP) and an IP67 rating for the HF-SP model. These Ingress Protection ratings indicate high protection against intrusion by solids and liquids, making them resilient in challenging industrial conditions. Similarly, the HG Series provides IP65 ratings for the HG-KN models and IP67 ratings for the HG-SN models. These ratings reinforce the series’ durability and reliability in environments where exposure to dust, moisture, or other potentially harsh elements is considered. Both series’ shared commitment to robust designs and high Ingress Protection ratings underscores their suitability for diverse industrial settings, providing users with confidence in their performance under varying environmental conditions. When determining the optimal servo motor for your specific requirements, the choice often comes down to the HF and HG series. The HF series is a solid choice if you seek a versatile and reliable servo motor suitable for various applications. On the other hand, if you focus on precision machining within machine tools, the HG series, distinguished by its medium-inertia design and enhanced sensor resolution, is specifically crafted for high-precision tasks. To make an informed decision, carefully consider factors such as the torque and speed requirements and the environmental conditions in which the servo motor will operate

This entry was posted on March 31st, 2024 and is filed under Automation, Education, Mitsubishi, Technology. Both comments and pings are currently closed.