Fuji Electric EVM31-050A | Compact PIM for High-Efficiency Motor Control
The Fuji Electric EVM31-050A is an expertly engineered Power Integrated Module (PIM) designed to streamline the development of compact and efficient low-to-mid-power motor drives. By integrating a three-phase converter, a three-phase inverter, a brake chopper, and a thermistor into a single, optimized package, this module dramatically reduces component count, simplifies PCB layout, and accelerates time-to-market for demanding industrial applications.
Key Performance Highlights
- System-in-a-Package Design: Integrates a 600V/50A 3-phase inverter, brake circuit, and converter bridge, minimizing board space and simplifying the Bill of Materials (BOM).
- Advanced E-Series Technology: Leverages Fuji's 4th Generation trench gate and field-stop IGBT technology to achieve an exceptional balance between low conduction losses and switching performance.
- Optimized for Motor Drives: The module's soft switching characteristics and low VCE(sat) are engineered specifically for the variable load and frequency conditions found in servo systems and general-purpose inverters.
- Built-in Thermal Monitoring: An integrated NTC thermistor provides real-time temperature feedback, enabling robust thermal protection and enhancing long-term system reliability.
Technical Specifications at a Glance
For a comprehensive analysis of all electrical and thermal characteristics, download the official Fuji Electric EVM31-050A datasheet. The table below summarizes the critical parameters for initial design assessment.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (Vces) | 600V |
| Collector Current (Ic) @ Tc=80°C | 50A |
| Collector-Emitter Saturation Voltage (VCE(sat)) (Typ. @ Ic=50A, Tj=125°C) | 1.7V |
| Total Power Dissipation (Pc) | 165W |
| Junction Temperature (Tj) | +150°C |
| Topology | 3-Phase Converter + Brake + 3-Phase Inverter |
Deep Dive: PIM Integration and E-Series Advantage
The core value of the EVM31-050A lies in its high level of integration, a concept known as a PIM (Power Integrated Module). For engineers designing compact AC servo systems or general-purpose drives, this approach solves several critical challenges. By co-packaging the rectifier, brake, and inverter stages, Fuji eliminates the complex parasitic inductances and layout challenges associated with discrete component designs. This results in a cleaner EMI signature and more predictable switching behavior right out of the box.
Underpinning this integration is Fuji's E-Series IGBT technology. The 4th generation trench gate structure is specifically engineered to lower the collector-emitter saturation voltage (VCE(sat)). A lower VCE(sat) directly translates to lower conduction losses, which is the dominant loss factor in motor drive applications, especially at lower operating frequencies. This efficiency gain simplifies thermal management, allowing for smaller heatsinks or higher power density within the same enclosure. For a deeper understanding of these core components, explore this in-depth analysis of IGBT modules.
Application Focus: Where the EVM31-050A Excels
The specific characteristics of the Fuji Electric EVM31-050A make it an ideal choice for power conversion systems up to approximately 15 kW.
- AC Servo Systems: In applications requiring high dynamic response and precision, such as robotics and CNC machines, the module's integrated nature and soft-switching behavior ensure smooth, controllable power delivery. This helps power precision robotic servo drives with reduced torque ripple and improved positioning accuracy.
- General Purpose Inverters: For industrial automation tasks like controlling pumps, fans, and conveyors, the EVM31-050A offers a robust, all-in-one solution that simplifies manufacturing and improves field reliability.
- Compact Machinery: In applications where space is at a premium, such as integrated motor-drive units or packaging equipment, the module’s small footprint provides a significant design advantage over larger, discrete-based solutions.
Frequently Asked Engineering Questions (FAQ)
1. What are the key considerations for the gate drive circuit for this PIM?
While the integrated nature simplifies the power stage, a robust gate drive is still crucial. Given the 600V rating and target applications, a drive voltage of +15V (on) and -8V to -15V (off) is recommended to ensure full enhancement and prevent parasitic turn-on. Due to the proximity of the inverter switches, careful PCB layout of the gate drive traces is essential to minimize crosstalk and ensure clean switching.
2. How does the integrated thermistor improve system design?
The built-in NTC thermistor is placed in close thermal contact with the IGBT and diode chips. This provides a far more accurate and responsive temperature reading than an external sensor mounted on the heatsink. Your control system can use this feedback to implement precise over-temperature protection (OTP), derate the output power gracefully as temperatures rise, or control fan speed, significantly enhancing the overall robustness and lifespan of the drive. The importance of such parameters is critical for unlocking IGBT thermal performance.
For inquiries about pricing, availability, or to discuss how the EVM31-050A can fit into your next design, please contact our technical team.
