GYS101D5-RA2 Fuji Electric ALPHA5 Smart Servo Motor 100W 3000RPM

The GYS101D5-RA2 is a 100 W ultra-low inertia AC servo motor from the Fuji Electric ALPHA5 Smart GYS Series.

Designed for high-response motion applications, this motor combines a lightweight rotor structure with a 20-bit incremental encoder to achieve precise positioning and smooth speed control in compact automation equipment.

The RA2 configuration features a keyed straight shaft without a holding brake, providing a reliable mechanical connection for applications using keyed couplings.

With 3000 r/min rated speed and fast dynamic response, the GYS101D5-RA2 is suitable for machines requiring frequent acceleration, rapid positioning and stable repeatability.

Key Features

• 100 W ultra-low inertia servo motor
• ALPHA5 Smart GYS Series
• 20-bit incremental encoder
• 3000 r/min rated speed
• 5000 r/min maximum speed
• Keyed straight shaft
• High acceleration response
• Compact 200 V servo design

Typical Applications

• Pick-and-place systems
• Compact assembly machines
• Precision feeding equipment
• Inspection mechanisms
• Indexing applications

Ultra-Low Inertia Motion Performance

The main advantage of GYS101D5-RA2 is rapid dynamic response.

The low inertia rotor design helps achieve:

• Faster acceleration
• Faster deceleration
• Shorter positioning cycles
• Improved repeated motion accuracy

It is optimized for lightweight mechanical systems requiring frequent start-stop operation.

20-Bit Incremental Encoder Feedback

The integrated 20-bit incremental encoder provides high-resolution feedback for:

• Position control
• Speed regulation
• Servo loop adjustment
• Smooth low-speed operation

Compared with lower-resolution feedback systems, the 20-bit encoder improves positioning capability in precision automation applications.

Keyed Shaft Configuration

The RA2 version uses a keyed straight shaft.

Advantages:

• Secure mechanical torque transmission
• Compatible with keyed couplings
• Suitable for conventional machine structures
• Improved anti-slip connection

The shaft configuration should be matched with the machine coupling design.

No Brake Configuration

GYS101D5-RA2 does not include a holding brake.

Recommended for:

• Horizontal axes
• Lightweight mechanisms
• Applications without gravity load

For vertical-axis applications requiring load retention, a brake-equipped version should be selected.

GYS101D5-RA2 vs GYS101D5-RB2

GYS101D5-RA2

100 W

20-bit incremental encoder

Keyed shaft

No brake

GYS101D5-RB2

100 W

20-bit incremental encoder

Different shaft configuration

No brake

The main difference is the shaft-end design.

GYS101D5-RA2 vs GYS101DC1-CB

GYS101D5-RA2

ALPHA5 Smart series

20-bit encoder

Keyed shaft

GYS101DC1-CB

Previous generation configuration

16-bit encoder

Keyless shaft

D5 series provides higher feedback resolution and updated servo-system compatibility.

GYS101D5-RA2 vs GYS201D5-RA2

GYS101D5-RA2

100 W

Lower torque requirement

GYS201D5-RA2

200 W

Higher torque capability

Motor selection should consider load inertia, acceleration and required torque.

Installation Notes

Before installation:

• Confirm ALPHA5 Smart amplifier compatibility
• Verify encoder cable type
• Match keyed shaft coupling
• Check motor mounting dimensions
• Confirm load inertia
• Perform servo tuning after installation
• Test movement at low speed first

FAQ

Q1: What is the rated output of GYS101D5-RA2?

A1: The rated output is 100 W.

Q2: What encoder does this motor use?

A2: It uses a 20-bit incremental encoder.

Q3: Does it include a holding brake?

A3: No. This model is the non-brake version.

Q4: What is the shaft type?

A4: It uses a keyed straight shaft.

Q5: What is the rated speed?

A5: The rated speed is 3000 r/min, with a maximum speed of 5000 r/min.

Q6: What makes the GYS series different?

A6: The ultra-low inertia design provides faster response and shorter positioning cycles.

Q7: Which servo amplifier is compatible?

A7: It is designed for compatible Fuji Electric ALPHA5 Smart servo amplifier systems.

Q8: What applications are suitable?

A8: It is suitable for compact automation requiring high-speed and precise positioning.