The **M4Q045-DA01-01** is an AC shaded-pole motor manufactured by **ebm-papst**. It is widely used in refrigeration and ventilation systems (e.g., cooling evaporators and condensers). Below is a breakdown of its technical specifications and electronic characteristics. --- ### 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | ebm-papst | | **Motor Type** | M4Q045-DA (Shaded-pole motor) | | **Phase** | 1~ (Single-phase) | | **Nominal Voltage** | 230 VAC | | **Frequency** | 50 / 60 Hz | | **Input Power** | 29 W (at 50Hz) / 26 W (at 60Hz) | | **Output Power** | 5 W | | **Current Draw** | 0.19 A (50Hz) / 0.15 A (60Hz) | | **Speed** | 1300 RPM (50Hz) / 1550 RPM (60Hz) | --- ### 2. Key Electronic Components & Features #### A. Shaded-Pole Design This motor does not use a capacitor to start. Instead, it uses **shading coils** (copper rings) on a portion of each pole. These rings delay the magnetic flux in that section, creating a rotating magnetic field sufficient to start the motor. * **Advantage:** High reliability and simple construction. * **Disadvantage:** Lower efficiency compared to Permanent Split Capacitor (PSC) motors. #### B. Electrical Protection * **Impedance Protection:** The motor is "impedance protected" (marked as **External Protection Required: None** or **ZS**). This means that if the rotor is stalled (locked), the resistance of the windings is high enough to prevent the motor from drawing enough current to catch fire or melt the insulation. * **Insulation Class:** Typically Class B, designed to handle internal temperatures up to 130°C. #### C. Wiring and Connection The motor typically features a multi-wire lead (usually 3 or 4 wires depending on the specific cable harness) for connection to the AC mains. ```text Standard Connection Diagram: L (Line) -----> Brown/Black N (Neutral) -----> Blue PE (Earth) -----> Green/Yellow ``` --- ### 3. Operational Environment * **Bearing System:** Usually equipped with **Calister sleeve bearings** or ball bearings, designed for long-term maintenance-free operation. * **Degree of Protection:** IP42 (Protection against solid objects >1mm and splashing water). * **Direction of Rotation:** Counter-clockwise (CCW) when looking at the shaft end. ---