The **EMMS-AS-70-M-HS-RMB** is a high-performance AC synchronous servo motor manufactured by Festo. This specific model belongs to the EMMS-AS series, designed for precision motion control applications. --- ### 1. Technical Specifications Breakdown The alphanumeric code provides specific details regarding the motor's electronic and mechanical capabilities: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **EMMS-AS** | Series | AC Synchronous Servo Motor | | **70** | Flange Size | 70 mm | | **M** | Length | Medium | | **HS** | Feedback System | Digital Single-turn absolute encoder (Hiperface) | | **R** | Output Shaft | Smooth shaft (No keyway) | | **M** | Connection | M23 Plug (Standardized power/encoder connection) | | **B** | Brake | Integrated holding brake | --- ### 2. Electronic Component Overview #### A. The Synchronous Motor Technology The motor operates on the principle of permanent magnet excitation. Unlike induction motors, the rotor speed is exactly synchronized with the frequency of the magnetic field generated by the stator. * **Winding Type:** 3-phase sinusoidal. * **Protection:** Integrated temperature sensors (PTC/NTC) to prevent thermal overload of the windings. #### B. Feedback System (HS - Hiperface) The "HS" designation indicates a **Digital Absolute Encoder**. * **Resolution:** Typically 128 periods per revolution. * **Electronic Nameplate:** Stores motor parameters (rated current, torque, inertia) which the motor controller can read automatically for "plug-and-play" setup. * **Absolute vs. Incremental:** Because it is absolute, the motor knows its position within one revolution immediately upon power-up without needing a homing run. #### C. Integrated Holding Brake (B) This is an electromagnetic component used to lock the shaft in place when power is removed. * **Function:** Friction-based holding (not for dynamic braking). * **Electronic Control:** Managed by the motor controller; requires 24V DC to release. --- ### 3. Electrical Performance Data | Parameter | Value | | :--- | :--- | | **Nominal Voltage** | 360 V DC (Typical for AC Servo Controllers) | | **Nominal Torque** | ~2.2 Nm | | **Peak Torque** | ~5.3 Nm | | **Nominal Speed** | ~4,600 RPM | | **Insulation Class** | F (Up to 155°C) | --- ### 4. Wiring and Connection The motor uses two main circular M23 connectors: 1. **Power Plug:** Contains 3 phases (U, V, W), Earth/Ground (PE), and 2 pins for the 24V Brake control. 2. **Encoder Plug:** Contains the Hiperface communication lines (Sin/Cos signals and RS485 data) and the temperature sensor signals.