AC servo drive
Yaskawa Sigma-7 SERVOPACKs (SGD7S / SGD7W)
Single- and dual-axis Sigma-7 servo amplifiers with 3.1 kHz speed-loop bandwidth and a choice of MECHATROLINK-III, EtherCAT and PROFINET.
Key specifications
| Power (max) | 15,000 W |
|---|---|
| Supply | 3-phase 400 Vac (200 V versions also offered) |
| Fieldbus | MECHATROLINK-III, EtherCAT, PROFINET, Sigma-7Siec integrated controller |
| Axes | 2 |
Summarised in our own words from Yaskawa Electric Corporation's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1
Notes on this data
SGD7S 0.5-15 kW (400 V); SGD7W 2 x 0.75 kW and 2 x 1.5 kW. Output currents not extracted. Speed-loop bandwidth 3.1 kHz.
Specify Motion is not affiliated with Yaskawa Electric Corporation. Yaskawa and Sigma-7 SERVOPACKs (SGD7S / SGD7W) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Yaskawa part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
Leadshine's EL7 platform spans 220 VAC drives from 400 W to 2 kW, 400 VAC drives to 7.5 kW and an 11-22 kW high-power range, all with STO and EtherCAT, Modbus/pulse or PROFINET variants.
| Published maximum | Sigma-7 SERVOPACKs (SGD7S / SGD7W) | EL7S / EL7 Series AC Servo Drives |
|---|---|---|
| Continuous current | — | 44 A |
| Peak current | — | 88 A |
| Power | 15,000 W | 22,000 W meets or exceeds |
| Axes | 2 | 1 |
Network-capable AMC digital drives spanning 10-747 VDC and 120-480 VAC, up to 150 A continuous and 250 A peak (27.4 kW peak power), in PCB, panel, machine and vehicle formats. They support almost any motor type and feedback, plus CANopen, EtherCAT, POWERLINK and Modbus.
| Published maximum | Sigma-7 SERVOPACKs (SGD7S / SGD7W) | DigiFlex Performance Servo Drives (DP,… |
|---|---|---|
| Continuous current | — | 150 A |
| Peak current | — | 250 A |
| Power | 15,000 W | 27,400 W meets or exceeds |
| Axes | 2 | — |
A four-axis EtherCAT servo drive in one housing, 400-1500 W per axis on 220 or 400 VAC, with two STO circuits shared across the axes.
| Published maximum | Sigma-7 SERVOPACKs (SGD7S / SGD7W) | 4EL7-EC Four-Axis EtherCAT AC Servo Dr… |
|---|---|---|
| Continuous current | — | 6.8 A |
| Peak current | — | 20.4 A |
| Power | 15,000 W | 1,500 W |
| Axes | 2 | 4 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.
Other ac servo drive series
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