High Power Systems

Rapid Power Corporation is the world’s largest independent manufacturer of SCR and Chopper High Power Rectifier Systems. We design, manufacture, and test integrated high power transformers – rectifier systems for use in many heavy industrial processes such as electrochemical, electrowinning, electrorefining, electroplating, and other specialized applications.

Our multi-pulse transformer rectifier systems of various ANSI configurations are conservatively designed to provide reliable operation. Rapid Power will work with our customers to supply a rectifier system that meets your system’s technical requirements and provides a superior product that offers the best value for the money.

Rapid’s system designs may also be provided with auxiliary equipment as required by the specification, including switchgear, power factor correction and harmonic filters, heat exchangers, and free-standing cooling systems.

Rapid Engineering

Rapid High Power Rectifier Systems are engineered to internationally recognized standards including ANSI, IEEE, IEC, NEMA, UL, CSA, JEC, etc. Our application and design engineers will work with the client to determine the optimum rectifier system to meet the specifications. Our design capabilities include the complete High Power Transformer Rectifier System – inclusive of fully integrated operator interfaces and control systems for a single unit or entire multi-unit SCADA network. We can evaluate the impact of the rectifier system on the incoming power grid and design power factor correction and harmonic filtering as required.

Rapid designs and manufactures both thyristor (SCR) rectifiers and fast switching IGBT chopper rectifiers for large applications. With the latest techniques in both rectifier technologies, Rapid application engineers can recommend the optimum rectifier configuration for your project.

All Rapid high power rectifier systems are designed, manufactured, and tested in strict accordance with the latest applicable ANSI & IEEE standards.

Chopper Rectifier Design

The chopper rectifier designs consist of high frequency switching technology in a modular design package that converts the secondary AC voltage to a regulated output DC voltage.

Larger power systems are constructed of multiple chopper modules to obtain the specified current requirements. Each section of modules has a separate set of sensing and protection and receives directions from the main chopper controller. This chopper conversion process has minimal effect on the incoming power system and a high power factor is maintained at the level of a fixed diode converter.

The transformer section is configured to optimize the harmonics.  The total module count usually results in a 12 pulse configuration as seen by the utility. The load sees a very smooth, low ripple DC over the total range due to compact high frequency output filtering. Rapid designs and manufactures all the water-cooled IGBT power modules used in our chopper rectifiers.

A full control metering, monitoring, and fast protection scheme is integral to all Rapid and Dynapower chopper rectifiers.

Additional Features for the Chopper:

• High power factor over full range
• Low output ripple
• Low harmonic distortion
• Dynamic response
• Modular construction