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Fuji EVM31-050B | Compact PIM for High-Efficiency Motor Drives & Power Supplies
The Fuji EVM31-050B is a 600V, 50A Power Integrated Module (PIM) engineered for designers seeking a compact, high-efficiency solution for low- to medium-power applications. This module masterfully integrates a three-phase converter, a three-phase inverter, a brake chopper, and an NTC thermistor into a single, streamlined package. By leveraging Fuji Electric's advanced V-Series IGBT technology, the EVM31-050B delivers a compelling blend of low conduction losses, robust thermal performance, and simplified system design, making it an ideal cornerstone for modern power conversion systems.
Technical Deep Dive: Engineering for Performance and Reliability
The standout performance of the Fuji EVM31-050B is not accidental; it's the direct result of targeted silicon-level and packaging innovations. Two core features are particularly critical for design engineers:
- V-Series Field Stop Trench IGBT Technology: At the heart of this module lies Fuji's V-Series IGBTs. This technology creates a fine-patterned trench gate structure combined with a field-stop (FS) layer. The direct engineering benefit is a significantly optimized balance between collector-emitter saturation voltage (VCE(sat)) and turn-off switching losses (Eoff). For a system designer, this translates into lower overall power dissipation. In applications like variable frequency drives, this means reduced heatsink requirements, enabling smaller, more cost-effective end products with higher power density.
- Integrated Low-Loss Free Wheeling Diodes (FWD): The co-packaged FWDs are optimized for soft switching behavior and low forward voltage drop (Vf). This is crucial for motor drive applications where inductive load switching is constant. A soft recovery characteristic minimizes voltage overshoots and high-frequency oscillations, which simplifies the design of snubber circuits and reduces electromagnetic interference (EMI). This thoughtful diode integration accelerates compliance with EMC standards and improves overall system reliability.
Key Parameter Overview for the EVM31-050B
The following table provides a quick reference for the critical electrical and thermal characteristics of the EVM31-050B. For comprehensive data, including characteristic curves and SOA graphs, please refer to the official datasheet. Download the Fuji EVM31-050A Datasheet.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (Vces) | 600V |
| Collector Current (Ic) @ Tc=80°C | 50A |
| Collector-Emitter Saturation Voltage (Vce(sat)) @ Ic=50A | 1.9V (Typ.) |
| Total Power Dissipation (Pc) @ Tc=25°C | 220W |
| Isolation Voltage (Viso) | 2500V (AC for 1 minute) |
| Package Type | EconoPIM™ 2 |
Application Spotlight: Where the EVM31-050B Excels
The integrated nature and balanced performance of the Fuji EVM31-050B make it a superior choice for several demanding applications:
- Compact Motor Drives: For AC motor drives up to ~15 kW, the PIM configuration drastically reduces component count and simplifies PCB layout. The module's low thermal resistance ensures efficient heat extraction, a critical factor in enclosed, fan-less drive designs.
- Uninterruptible Power Supplies (UPS): In online UPS systems, the integrated converter and inverter stages within the EVM31-050B streamline the power conversion path. Its reliable switching characteristics ensure a clean and stable output waveform, protecting sensitive loads. For more information on the backbone of these systems, explore our guide on IGBT modules in high-efficiency power systems.
- Servo Drives: The fast and soft-recovery FWD is essential for the high-dynamic performance required in robotic servo drives. It enables precise motor control by minimizing ringing and allowing for higher control loop bandwidth.
- Small-Scale Solar Inverters: The module’s efficiency and integration are beneficial for residential and small commercial solar inverters, helping to maximize energy harvest and improve the overall return on investment of the photovoltaic system.
Frequently Asked Questions (FAQ)
What are the primary advantages of using a PIM like the EVM31-050B over discrete IGBTs and diodes?
The primary advantage is system integration. A PIM significantly reduces assembly complexity, component count, and the physical footprint of the power stage. It also provides guaranteed thermal and electrical performance between the integrated components (converter, inverter, brake), which is difficult to achieve and validate with a discrete design. This leads to faster time-to-market and enhanced system reliability.
How does the integrated NTC thermistor benefit my design?
The on-board NTC thermistor provides a direct, real-time temperature measurement of the module's baseplate. This feedback is critical for implementing an effective over-temperature protection (OTP) strategy in your control software. It allows the system to gracefully reduce power or shut down before a catastrophic thermal runaway event occurs, which is a key aspect of preventing common IGBT failure modes.
For detailed selection advice or to discuss how the Fuji EVM31-050B can fit into your specific design, please contact our technical team for expert consultation.
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