Italiano
The products may undergo changes or may not correspond to you.
NSK Servo Drive
Brand: NSK -
Cat: Servo Drive
Code:ESA-Y2020T25-21
| Combination name | Availability | Price |
|---|---|---|
Servo Amplifier Drive – NSK ESA-Y2020T25-21
The ESA-Y2020T25-21 is an electric servo amplifier / servo drive (“Electric Servo Amplifier”) manufactured by NSK, belonging to the ESA-Y series. Designed for vector control of brushless servo motors with a transistor-based power stage, the module is rated for a nominal output current of 25 A (T25 designation). The unit is intended for CNC machining centres, precision grinding machines, and high-dynamic positioning systems. It manages the motor current and speed control loops, receiving digital or analogue references from the CNC controller and generating PWM modulation on the power stage.
The servo amplifier is the key element of the drive chain: it converts the speed or torque reference provided by the CNC into three-phase current applied to the servo motor windings, ensuring that the programmed trajectory is followed with minimal tracking error. A failure of this module results in complete loss of control of the axis or spindle it serves: the machine stops in alarm and machining cannot resume until the drive is replaced or repaired.
NSK Ltd. (Nippon Seiko K.K.), founded in Japan in 1916, is one of the world’s leading manufacturers of rolling bearings, linear guides, and precision mechatronics. The NSK Precision division develops motors, drives, and integrated systems for high-precision CNC applications. All products in the ESA series are legacy / discontinued and available exclusively as used or surplus components or through specialist repair services.
Main Technical Specifications
| Type | Servo amplifier / Servo drive (Electric Servo Amplifier) |
| Part number | ESA-Y2020T25-21 (ESAY2020T2521) |
| Brand | NSK (NSK Precision / NSK Mechatronics) |
| Known application | CNC machining centres, precision grinding machines, high-dynamic positioning systems with NSK servo motors |
| Function | Servo motor speed and torque regulation; PWM modulation generation on power stage |
| Output current (rated) | 25 A |
| Reference input | Analogue ±10 V and/or digital serial interface (typical ESA-Y series) |
| Feedback | Incremental encoder / resolver (typical for NSK servo motors) |
| Supply voltage | 200–230 V AC three-phase |
| Interfaces / connectors | Edge connectors and/or terminal strip; CNC communication bus (typical) |
| Weight | ~2–5 kg |
| Dimensions | ~150–350 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
