The cascade H-bridge topology is simple, flexible, and widely applied in high-voltage cascade inverters, Static Var Generators (SVG), and cascade H-bridge energy storage systems.

In industrial applications, motors, which serve as the driving units for equipment such as fans, pumps, compressors, conveyors, and crushers, consume significant amounts of energy. By integrating cascade inverters with production processes, motor energy consumption can be substantially reduced.

In energy storage systems, high-voltage cascade technology uses multiple energy storage units to form a large power, high-current storage system. This configuration eliminates the need for a transformer and allows direct connection to the grid, offering higher cycle efficiency, reducing land usage, and preventing issues such as unequal charge states between battery modules in traditional systems. This helps minimize effective capacity degradation during long-term operation.

SVG (Static Var Generator) is primarily used to enhance the transmission capacity and stabilize transient voltages of the power grid. It can also be applied to reactive power regulation in transmission and distribution networks, as well as in wind power and photovoltaic power plants. Additionally, SVG can be used for power factor control in industries such as mining, petrochemicals, and coal mining, as well as for bus voltage flicker suppression and compensating unbalanced loads. It also helps in filtering harmonic currents from loads, ultimately improving power quality and promoting energy efficiency.

In response to these two applications, MACMIC has launched a range of half-bridge modules (75A-450A) and H-bridge integrated modules (75A-150A). By paralleling a single or multiple half-bridge modules per phase, these products can cover the medium to small power range (3kV-10kV) of high-voltage inverters, part of the large power range, and the medium-capacity range (3kV-35kV) for cascade energy storage systems and SVGs. For smaller power applications, such as low-power high-voltage inverters, the H-bridge integrated modules reduce the number of modules required, significantly reducing the size of the system and lowering structural costs.

Half-Bridge Topology Module

Example: MMG450WB170B6TC Half-Bridge Module

Product Features

• Based on the GWB Packaging Platform

• High power density for efficient energy conversion

• Low thermal resistance design for enhanced heat dissipation

• Low parasitic inductance to minimize switching losses

• Successfully passed reliability tests such as HV-H3TRB and anti-sulfur tests, ensuring high durability and performance in harsh operating

Parameter Comparison

1. Under normal to elevated temperatures, the FRD voltage drop is significantly lower, and the thermal resistance is smaller compared to competitors. The IGBT voltage drop is comparable to competitors’, but its thermal resistance is smaller, leading to reduced overall heat generation.

   
   

2. Under normal to elevated temperatures, at the same switching speed, the module exhibits lower switching losses and reduced peak values, with smaller parasitic inductance, leading to improved overall performance and energy efficiency.

   
   

   
   

3. At 150°C, with VGE = 15V and Vcc = 1000V, the short-circuit capability of the module is ≥ 10μs.

   
   

   
   

4. The module has successfully passed rigorous reliability tests, including HV-H3TRB and sulfur resistance, etc.

   
   

H-Bridge Integrated Module

Example: MMG100W170HX6TC Integrated Module

Product Features

• Based on GW Packaging Platform

• High Integration

• High Power Density

• Built-in NTC Thermistor

• The module has successfully passed rigorous reliability tests, including HV-H3TRB and sulfur resistance, etc.

Application Benefits

Traditionally, high-voltage inverters require two separate half-bridge IGBT modules and one rectifier diode module to construct an H-bridge topology, totaling three power modules. With MACMIC’s MMG100W170HX6TC integrated module, you can replace the three modules with just one module, simplifying the design and reducing the number of components. This integration also includes a built-in NTC thermistor, which assists in real-time temperature monitoring during operation.

Compared to the original solution, the integrated module not only maintains all the functions but also simplifies the system design. One integrated IGBT module forms a single unit of the high-voltage inverter, making system cascading design easier.

If operating conditions remain the same, using the new integrated product can significantly reduce the size of the link stages, thereby shrinking the overall system volume, lowering structural costs, and optimizing electrical performance.

Summary

The 1700V product series launched by MACMIC not only improves chip performance but also innovates in packaging design, effectively reducing power consumption and enhancing efficiency. Additionally, it boasts superior reliability, with features such as HV-H3TRB and anti-sulfurization tests, ensuring excellent performance in real-world applications.

We believe that this 1700V series of IGBT modules will provide higher performance and reliability for applications in industrial control, variable frequency drives, and power quality improvement, while also driving more innovation and progress in the industry.