DC servo drive
Leadshine ELD3 Series Miniature DC Servo Drives
Palm-sized 24-70 VDC servo drives (76 x 50 x 33.5 mm) from 50 to 750 W in EtherCAT, CANopen and Modbus RTU versions, with STO, a second encoder input for full closed loop and support for slotless, brushed, voice-coil and linear motors.
Key specifications
| Ingress protection | IP20 |
|---|---|
| Power | 50–750 W |
| Supply | 24-70 VDC (control 24 VDC +/-25%) |
| Feedback | Hall UVW + ABZ, RS485 serial encoder (Tamagawa), BiSS-C, 17-bit absolute magnetic, 2500 PPR incremental, Second encoder / linear scale |
| Fieldbus | EtherCAT, CANopen, Modbus RTU, Pulse, Analogue, USB-C tuning |
| Axes | 1 |
| Continuous current (max) | 20 A |
| Peak current (max) | 50 A |
| Safe torque off | SIL3 |
Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.
Options
- Without housing (M) or with housing (H)
- Brake output (B)
- Gantry synchronisation
Typical applications
What a DC servo drive is
A DC servo drive controls a servo motor from a low-voltage DC supply, typically between about 12 and 100 V, such as a battery or a DC power supply. It uses a PWM power stage to regulate current in brushless or brushed motors, with current, velocity and position loops closed using encoder or Hall feedback. Many are compact, some palm-sized, with CANopen, EtherCAT, Modbus or pulse inputs. Higher current is needed for the same power than with mains drives.
When engineers choose a DC servo drive
Choose a DC servo drive for mobile robots, AGVs, battery equipment, medical devices and machines designed around safety extra low voltage. It allows simple distribution and safe access to live parts. The trade-offs are current and power: high currents need heavy cables and good connections, so power is typically limited to a few kilowatts. For mains-powered machines above that, an AC servo drive is usually more economical.
How to specify the Leadshine ELD3 Series Miniature DC Servo Drives
Send these with your enquiry and an engineer can confirm the right ELD3 Series Miniature DC Servo Drives variant:
- Supply voltage range (V DC)
- Continuous and peak current (A)
- Motor type: brushless, brushed, linear
- Feedback: encoder, Hall or absolute
- Interface: CANopen, EtherCAT, Modbus, pulse
- Safety functions and STO
- Size, mounting and cooling
Common mistakes to avoid
- Ignoring battery voltage swing from full to low charge
- Undersizing cables and connectors for high current
- Forgetting regenerative energy into the battery
- Overlooking grounding and EMC on low-voltage systems
Leadshine ELD3 Series Miniature DC Servo Drives: frequently asked questions
What is the Leadshine ELD3 Series Miniature DC Servo Drives?
Palm-sized 24-70 VDC servo drives (76 x 50 x 33.5 mm) from 50 to 750 W in EtherCAT, CANopen and Modbus RTU versions, with STO, a second encoder input for full closed loop and support for slotless, brushed, voice-coil and linear motors. Published series figures include power 50 W, power 750 W, axes 1, continuous current 20 A. It is available through our supply network, and our engineers can confirm the right variant for your application.
Who makes the Leadshine ELD3 Series Miniature DC Servo Drives?
The Leadshine ELD3 Series Miniature DC Servo Drives is made by Leadshine (Leadshine Technology) available through our supply network. Send us your requirement for pricing, lead time, datasheets and CAD.
What is the power of the Leadshine ELD3 Series Miniature DC Servo Drives?
The published series minimum power is 50 W. Individual models and sizes in the ELD3 Series Miniature DC Servo Drives range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Can a DC servo drive return energy to a battery?
Yes, during braking the motor regenerates energy into the DC bus, and with a battery it can be absorbed if the battery management system allows charging. Without a battery or with a full battery, voltage rises, so a braking resistor or clamp circuit may be needed. Check the drive's overvoltage threshold.
What size DC drive do I need?
Size the drive from the motor's continuous and peak current demands, the supply voltage range and the duty cycle. Allow margin above the motor's peak current and check how long the drive can deliver peak. Then confirm the interface and feedback types match the motor and controller.
Further reading: How to select a servo drive · How to select a pcb mount servo drive · Servo drives
Often compared with
Engineers specifying this series often compare it with:
Other dc servo drive series
Spec builder
Configure Leadshine ELD3 Series Miniature DC Servo Drives
Select every part you need, answer the questions an applications engineer would ask, and see your summary before we ask for any details.
- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
Engineer support
Need Leadshine ELD3 Series Miniature DC Servo Drives or a complete system around it?
Tell us what you need, whether it is this part, an equivalent or a complete axis built around it. An engineer will review your requirements and reply, normally within one working day.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
Prefer to configure it? Use the spec builder.