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AC Servo Inverter – LENZE EVS9324-ESV004
The EVS9324-ESV004 is an AC servo inverter (“AC Servo Drive”) from the 9300 series by LENZE, designed for field-oriented vector control of AC synchronous/brushless servo motors in CNC and industrial automation applications. The part number identifies a unit from the EVS9300 family with integrated EMC filter (suffix E), in hardware/software variant SV004. The series is documented on CNC machining centres, CNC lathes, packaging machinery and multi-axis motion control systems. The drive provides precise speed and torque control of the servo motor via incremental encoder or resolver feedback. Multiple variants exist within the EVS9300 series, differentiated by power rating and fieldbus communication options.
The servo inverter is the core of the drive chain on a CNC axis: it converts mains voltage into variable voltage and current for the motor, executing real-time field-oriented control (FOC – Field Oriented Control) based on the CNC command and the encoder feedback signal. A servo inverter failure completely disables the controlled axis — the machine can neither position nor interpolate that axis, making any machining operation impossible until the unit is replaced or repaired.
LENZE is a German manufacturer founded in 1947, specialising in electric drives, inverters, gear motors, and automation systems for industrial machinery; the group has remained independent and is still active, headquartered in Aerzen, Germany. The EVS9300 series, introduced in the 1990s, was one of the most widely deployed servo drive families in European CNC and packaging applications; the entire product line is now legacy / discontinued, having been replaced by the i550 and i650 platforms.
Main Technical Specifications
| Type | AC Servo Inverter — AC Servo Drive (EVS9300 series) |
| Part number | EVS9324-ESV004 (EVS9324ESV004) |
| Brand | LENZE (Lenze SE, Germany) |
| Known application | CNC machining centres, CNC lathes, packaging machines, multi-axis motion control systems |
| Function | Field-oriented vector control of AC servo motor speed and torque (FOC) |
| Nominal power | ~3.0 kW |
| Input voltage | 3 × 400 V AC, 50/60 Hz (typical) |
| Nominal output current | ~8 A |
| Control method | Field-oriented vector control (FOC) – PWM modulation |
| Encoder interface | Incremental encoder / resolver (TTL); Sub-D connector |
| Communication interfaces | RS-232 / RS-485; optional PROFIBUS-DP, CANopen, DeviceNet (add-on modules) |
| Weight | ~2–4 kg |
| Dimensions | ~270–350 × 70–110 × 200–260 mm H×W×D |
| Production status | Legacy / discontinued — used/surplus/repair only |
AC Servo Inverter – LENZE EVS9323-ES
The EVS9323-ES is an AC servo inverter (“AC Servo Inverter”) from the 9300 series manufactured by Lenze, designed for field-oriented vector control of synchronous and asynchronous AC servo motors in industrial automation and CNC machine tool applications. The unit implements PWM modulation with high-dynamic speed and torque regulation; the ES variant identifies a specific functional and communication configuration within the EVS9300 family. The device supports feedback via incremental encoder or resolver and fieldbus protocols for seamless integration into the machine control system.
The EVS9323-ES is the axis controller that receives the position or speed reference from the CNC and generates the output voltage and frequency required to drive the motor with micrometric precision in both speed and torque. A failure of this component renders the controlled axis completely inoperative: the machine stops on alarm, the current machining operation must be aborted with the consequent risk of scrapping the workpiece in progress, and recovery requires replacement or repair of the module before the production cycle can be restarted.
Lenze SE is a German company headquartered in Aerzen (Lower Saxony), founded in 1947 and specialised in drive and industrial automation technology: frequency inverters, servo drives, gearboxes and control systems for the manufacturing industry. The EVS9300 series has been progressively superseded by next-generation platforms (including the i700 series); products in the EVS9300 family are now considered legacy / discontinued and available exclusively as used spare parts, NOS surplus or through specialist repair services.
Main Technical Specifications
| Type | Three-phase AC servo inverter – AC Servo Inverter (9300 series) |
| Part number | EVS9323-ES (EVS9323ES) |
| Brand | Lenze (Lenze SE, Germany) |
| Series | EVS9300 – Single-axis servo inverter |
| Known application | CNC machine tools, industrial automation systems with synchronous and asynchronous AC servo motors |
| Function | Field-oriented vector control (FOC) of speed and torque on synchronous / asynchronous AC servo motor |
| Input voltage | 3×400 V AC ±10 %, 50/60 Hz |
| Rated power | ~4–7.5 kW |
| Control type | Field-oriented vector control (FOC) with PWM modulation; position, speed and current loops |
| Feedback | Incremental encoder (TTL/HTL) or resolver; sin/cos support (typical 9300 series) |
| Communication interfaces | CANopen / LECOM / optional fieldbus (depending on ES variant) |
| Digital / analogue I/O | Digital and analogue inputs/outputs for enable, alarm and speed reference (typical 9300 series) |
| Weight | ~3–7 kg |
| Dimensions | ~200–400 mm × 100–250 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |