Product Short Description
Product Name: NSK ESA35 Series Megatorque Direct-Drive Servo Driver Unit
Product Introduction: The ESA-1010A35 is a high-precision servo driver unit in NSK’s ESA35 series, purpose-built for NSK Megatorque direct-drive torque motors. It integrates current-loop, velocity-loop, and position-loop control for zero-backlash, high-dynamic-response motion control.
Description
Technical Specifications:
- Control modes: Position control (pulse/direction), velocity control, torque control
- Feedback: High-resolution resolver, 614,400 pulses/rev (12-bit) or 409,600 pulses/rev (10-bit)
- Rated output current: 10 A continuous, 20 A peak
- Supply input: 200–220 V AC ±10%, 50/60 Hz, single-phase
- Communication: Pulse I/O, analog input, RS-232/485, optional fieldbus
- Digital I/O: 16 inputs / 8 outputs (optically isolated)
- Cooling: Forced air cooling
- Stall torque (system): up to 147 N·m
- Positioning repeatability: ±0.00058° (≈ ±2.1 arcseconds)
- Response time: < 1 ms
Functional Characteristics: Three-loop digital control architecture delivers bandwidths up to 1 kHz (position), 2 kHz (velocity), and 5 kHz (current). Supports torque, speed, and position control modes.
Application Scenarios: Semiconductor manufacturing equipment, precision machine tools, robot joints, optical inspection systems, rotary tables, and indexers.
Structural & Material Features: Industrial-grade servo driver chassis; paired with a hollow-shaft direct-drive torque motor (approx. 40 kg motor mass, 2.9–3.0 kg driver mass).
Working Principle: Converts commanded position/velocity/torque values into precisely regulated three-phase current delivered to the direct-drive motor, using resolver feedback for closed-loop correction.
Installation Requirements: Mount in a control cabinet with adequate forced-air ventilation. Ambient temperature 0 to 50 °C, humidity 10–90% (non-condensing). Protect from corrosive gases and excessive dust.
Usage Notes: Firmware version 21.1 denotes a specific control algorithm revision. Over-voltage, under-voltage, over-current, over-temperature, encoder-abnormality, motor-overload, and short-circuit protections are built in.
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