AC servo drive
Kollmorgen AKD AC servo drive
Single-axis servo drive family covering 120/240 V and 240/480 V supplies, with broad feedback compatibility and a choice of industrial Ethernet and CAN fieldbuses.
Need this part, a replacement or a complete package? Our experienced UK engineering team helps you select, source and obtain the right products, with pricing, delivery coordination and after-sales support.
Pricing and availability
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Need Kollmorgen parts, a replacement or a suitable alternative? Send us a part number, or tell us what the machine needs to do. Our UK engineers will come back with the right product, pricing, lead time and delivery, whether that is the original part, a checked alternative or a complete axis.
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Select every part you need and answer the questions an applications engineer would ask. Our engineers use your specification to come back with the right products, pricing and lead times. You see your summary before we ask for any details.
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- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Power (max) | 32,000 W |
|---|---|
| Supply | 120/240 Vac 1/3-phase (85-265 V) or 240/480 Vac 3-phase (187-528 V); 24 V logic |
| Feedback | Smart Feedback Device, EnDat 2.1/2.2, BiSS, sine/cosine encoder, incremental encoder, HIPERFACE, resolver |
| Fieldbus | EtherCAT, EtherNet/IP, PROFINET RT, Modbus/TCP, CANopen, SynqNet |
| Axes | 1 |
| Continuous current (max) | 48 A |
| Peak current (max) | 96 A |
Summarised in our own words from Regal Rexnord Corporation's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1
Notes on this data
Current range 3-48 A rms continuous, 9-96 A peak (5 s); 48 A model (AKD-x04807) 480 V only. Page does not state lifecycle status; AKD2G is the newer generation. Sercos appears only in document list, not included.
Specify Motion is not affiliated with Regal Rexnord Corporation. Kollmorgen and AKD are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Kollmorgen AKD replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Kollmorgen part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
AMC's analogue servo drives for centralised control schemes: set up with DIP switches and potentiometers, commanded by +/-10 V or PWM. They span 10-400 VDC and 45-265 VAC, up to 150 A continuous and 250 A peak, in PCB, panel and vehicle formats. PCB extended-environment parts run -40 to +85 C.
| Published maximum | AKD | AxCent Analogue Servo Drives (AB, AZ, … |
|---|---|---|
| Continuous current | 48 A | 150 A meets or exceeds |
| Peak current | 96 A | 250 A meets or exceeds |
| Power | 32,000 W | — |
| Axes | 1 | — |
ADVANCED Motion Controls' ultra-compact, high power-density digital servo drives for 10-90 VDC systems, up to 100 A continuous and 200 A peak. They come in PCB, machine-embedded, panel and development-board formats, carry STO as standard, and run EtherCAT, CANopen or Ethernet/IP. Extended-environment models are rated -40 to +95 C.
| Published maximum | AKD | FlexPro Digital Servo Drives (FE, FX, … |
|---|---|---|
| Continuous current | 48 A | 100 A meets or exceeds |
| Peak current | 96 A | 200 A meets or exceeds |
| Power | 32,000 W | — |
| Axes | 1 | — |
A dual-axis low-voltage Kinco drive for AGV differential-drive wheels, with RS + CANopen or RS + pulse variants and built-in brake output.
| Published maximum | AKD | FDS Two-in-One Low-Voltage DC Servo Dr… |
|---|---|---|
| Continuous current | 48 A | — |
| Peak current | 96 A | — |
| Power | 32,000 W | — |
| Axes | 1 | 2 meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What an AC servo drive is
An AC servo drive, or servo amplifier, powers and controls a servo motor from mains supply. It rectifies the AC input to a DC bus, then uses an inverter of power transistors switched by PWM to produce controlled three-phase current in the motor. Nested current, velocity and position loops use encoder feedback to follow commands from pulse and direction, analogue or industrial Ethernet. Modern drives add auto-tuning, vibration suppression and safety functions such as safe torque off.
When engineers choose an AC servo drive
Choose an AC servo drive for mains-powered machines with servo axes from tens of watts to many kilowatts, such as packaging, machine tools and robotics. It gives precise, dynamic control with standard industrial interfaces. The trade-offs are cabinet space, wiring, EMC measures and the need to match motor and feedback. For low-voltage or mobile machines, a DC drive is more suitable; for many axes in one cabinet, a multi-axis drive may save space.
How to specify the Kollmorgen AKD
Send these with your enquiry and an engineer can confirm the right AKD variant or an equivalent:
- Supply voltage and phases (V AC)
- Continuous and peak output current (A rms)
- Motor and feedback compatibility
- Command interface: pulse, analogue, EtherCAT, PROFINET and so on
- Safety functions, such as STO, and their rating (SIL, PL)
- Braking resistor and regenerative energy (W, J)
- Ambient temperature, mounting and cooling
Common mistakes to avoid
- Sizing on motor rated current without the drive's peak duration
- Ignoring regenerative energy on fast decelerations or vertical axes
- Leaving out EMC filtering and screened motor cables
- Mixing motor and encoder types the drive does not support
Kollmorgen AKD: frequently asked questions
Can you help replace Kollmorgen AKD or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Kollmorgen AKD?
Single-axis servo drive family covering 120/240 V and 240/480 V supplies, with broad feedback compatibility and a choice of industrial Ethernet and CAN fieldbuses. Published series figures include power 32,000 W, axes 1, continuous current 48 A, peak current 96 A. It is made by Regal Rexnord Corporation; Specify Motion can help source it or propose an equivalent.
Who makes the Kollmorgen AKD?
The Kollmorgen AKD is made by Kollmorgen (Regal Rexnord Corporation) and is listed here for engineers comparing options. Specify Motion is not affiliated with Regal Rexnord Corporation; brand names are used only to identify the product.
What is the power of the Kollmorgen AKD?
The published series maximum power is 32,000 W. Individual models and sizes in the AKD 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.
Is there an alternative to the Kollmorgen AKD?
We can assess suitable replacement options. On published figures, ADVANCED Motion Controls AxCent Analogue Servo Drives (AB, AZ, AV, B, AVB) and ADVANCED Motion Controls FlexPro Digital Servo Drives (FE, FX, FM, FD, FMP; Micro and Mini sizes) are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
Does a servo drive need a braking resistor?
When a servo motor decelerates, it acts as a generator and returns energy to the drive's DC bus. If the bus capacitors cannot absorb it, the voltage rises and the drive trips. A braking resistor dissipates the energy as heat. Fast decelerations, high inertia and vertical axes usually need one.
What is safe torque off on a servo drive?
Safe torque off, or STO, is a safety function that removes power that could produce torque at the motor, without disconnecting the drive supply. It is defined in IEC 61800-5-2 and used as part of a machine's safety system. Check the safety level achieved and wiring requirements.
Further reading: How to select a servo drive · How to select a servo motor · Servo drives
Other ac servo drive series
Engineer support
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Tell us how you use the Kollmorgen AKD: the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
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Prefer to configure it? Use the spec builder.
How it works
From enquiry to delivery
Send a part number or describe the application. Our engineers take it from there: the right product, a clear quotation, and delivery and support arranged.
- 01Tell us what you needSend a part number, or configure the application, quantities and timing.
- 02An engineer reviews itWe check the specification and find the original part, a checked equivalent or a complete axis.
- 03Receive your quotationProducts, pricing, lead time and compatibility notes in one reply.
- 04Order and deliveryWhen you are happy, the order is placed and delivery and after-sales support are arranged.