The **HVS-EE-R** typically refers to a high-voltage sensor or transducer component used in power electronics, specifically within the **LEM** (Liaisons Electroniques et Mécaniques) product families or similar high-precision voltage isolation systems. These parts are designed to measure high DC, AC, or pulsed voltages with galvanic isolation. --- ### 1. Core Electronic Specifications The "EE" series usually signifies an electronic board-level integration with specific input/output characteristics. | Parameter | Typical Value / Range | | :--- | :--- | | **Primary Voltage ($U_{pn}$)** | 100V to 4000V (Model dependent) | | **Secondary Output** | Current signal (e.g., 50mA) or Voltage signal | | **Accuracy** | ±0.5% to ±1.5% at $+25^\circ C$ | | **Frequency Bandwidth** | DC to 15 kHz | | **Isolation Voltage** | 4kV to 12kV AC / 50Hz / 1 min | | **Power Supply** | ±15V to ±24V DC | --- ### 2. Key Electronic Internal Components The HVS-EE-R functions based on the **Closed Loop Hall Effect** or **Electronic Isolated Amplifier** principle. #### A. Primary Resistor Network High-precision, high-stability resistors are used at the input stage to convert the primary voltage into a small primary current ($I_p$). These resistors must handle significant power dissipation and thermal drift. #### B. Isolation Barrier This is the most critical part of the electronic design. It ensures that the high-voltage side is physically and electrically separated from the low-voltage control side (PLC, Microcontroller, or DSP). #### C. Compensation Circuit (Closed Loop) * **Hall Generator:** Senses the magnetic flux created by the primary current. * **Integrator/Amplifier:** An internal Op-Amp circuit drives a secondary current into a compensation coil. * **Secondary Coil:** Creates an opposing magnetic field to maintain a "zero flux" state, ensuring high linearity. --- ### 3. Connection Pinout (Typical) Most HVS-EE-R modules utilize a multi-pin connector for the low-voltage side: | Pin | Function | Description | | :--- | :--- | :--- | | **+Vc** | Positive Supply | Usually +15V or +24V | | **-Vc** | Negative Supply | Usually -15V or -24V | | **M** | Measurement | Output signal (current or voltage) | | **0V** | Ground | Common reference for power supply | --- ### 4. Applications * **Traction Converters:** Measuring overhead line voltages in trains. * **Renewable Energy:** Monitoring DC link voltages in large solar inverters. * **Industrial Drives:** Voltage feedback for high-power motor control. --- ### 5. Implementation Example (Code Logic) When reading the output of an HVS-EE-R with a microcontroller (via a shunt resistor $R_m$), use the following logic: ```python # Constants based on HVS-EE-R Datasheet V_PRIMARY_MAX = 2000.0 # Max rated primary voltage I_SECONDARY_MAX = 0.050 # 50mA secondary output R_SHUNT = 100.0 # Shunt resistor in Ohms def calculate_voltage(adc_value, v_ref, resolution): # Convert ADC to measured voltage across R_shunt v_measured = (adc_value / (2**resolution - 1)) * v_ref # Calculate Secondary Current i_sec = v_measured / R_SHUNT # Calculate Primary Voltage v_primary = (i_sec / I_SECONDARY_MAX) * V_PRIMARY_MAX return v_primary ```