Powerex CM421655 | High-Integration 1600V/55A CIB IGBT Module
The Powerex CM421655 is an expertly engineered Converter-Inverter-Brake (CIB) IGBT module designed to streamline the development of small to medium-power motor control and power conversion systems. By integrating a three-phase converter, a three-phase inverter, and a brake chopper into a single, compact package, this module provides a robust foundation for building reliable and cost-effective solutions. It is specifically tailored for engineers seeking to reduce system size, simplify assembly, and enhance overall electrical performance.
Key Design Advantages of the CM421655
- System Simplification: The highly integrated 7-in-1 CIB topology dramatically reduces component count, minimizes PCB complexity, and lowers assembly costs compared to discrete solutions.
- Optimized Thermal Performance: Built on an isolated baseplate, the module ensures excellent thermal transfer to the heatsink, simplifying thermal management and improving long-term reliability.
- Low Conduction Losses: Utilizing advanced IGBT and diode chip technology, the CM421655 features a low VCE(sat), which minimizes power dissipation during operation, leading to higher system efficiency.
- Enhanced Reliability: The monolithic design reduces internal parasitic inductance and provides a more rugged, reliable power stage than assemblies built from multiple discrete components.
Application Scenarios & Engineering Value
The CM421655's integrated nature and robust electrical characteristics make it a premier choice for a range of demanding applications where space, cost, and reliability are critical design drivers.
AC Motor and Variable Frequency Drives (VFDs)
In the competitive field of AC motor control, the CM421655 excels. Its all-in-one CIB configuration provides the complete power stage for a compact Variable Frequency Drive (VFD). Engineers can achieve a significantly smaller drive footprint and a simplified bill of materials (BOM), accelerating time-to-market. The integrated brake chopper is particularly valuable for applications requiring dynamic braking or rapid deceleration, eliminating the need for an external brake circuit.
Precision Motion and Servo Control
For high-performance servo drives, control accuracy and reliability are paramount. The low VCE(sat) of the CM421655 ensures minimal voltage drop and stable performance, contributing to precise current control for the motor. This module's robust construction provides the durability needed for the repetitive, high-stress cycles typical in robotic and automated servo systems.
General Purpose Power Conversion
Beyond motor control, this module serves as a versatile building block for uninterruptible power supplies (UPS), welding power sources, and other general-purpose inverters. The 1600V rating provides a substantial safety margin for applications operating on 400V/480V AC lines, ensuring robust performance even with line voltage fluctuations.
Key Technical Parameters
The following table outlines the critical performance specifications for the Powerex CM421655. For a complete overview of its characteristics and operating curves, please download the official datasheet.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (VCES) | 1600V |
| Collector Current (IC) @ TC=80°C | 55A |
| Collector-Emitter Saturation Voltage (VCE(sat)) (Typ. @ 55A) | 2.2V |
| Maximum Junction Temperature (Tj(max)) | 150°C |
| Isolation Voltage (Visol) (AC, 1 min.) | 2500Vrms |
Frequently Asked Questions (FAQ)
What is the primary advantage of a CIB module like the CM421655 over using discrete components?
The core advantage is integration. By combining the rectifier, inverter, and brake chopper, the CM421655 drastically reduces parasitic inductance between power stages, which can cause voltage overshoots and EMI issues in discrete designs. This integration also simplifies the mechanical layout, guarantees component matching, and streamlines the thermal design to a single heatsink interface, ultimately leading to a more reliable and cost-effective end product.
How does the integrated brake circuit in the CM421655 benefit my design?
The integrated brake chopper provides a ready-made solution for managing regenerative energy. In motor drive applications where the motor acts as a generator (e.g., during rapid deceleration or when lowering a load), this energy flows back to the DC bus, causing its voltage to rise. The brake circuit safely dissipates this energy through an external resistor, protecting the inverter from overvoltage faults. Integrating this function saves significant design effort and board space. For detailed guidance on implementation or selecting the right power module for your project, please contact our technical team.
