FMU-12R

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Diodes, rectifiers and arrays are commonly used in power electronics applications. The FMU-12R, is a thyristor based rectifier that provides high current rectification. This application note will discuss the application field and working principle of the FMU-12R.

Introduction

The FMU-12R Rectifier is a three-phase self-contained rectification device. It is capable of being selected to different current ratings, up to a maximum of 13.2A. The FMU-12R rectifier is designed to provide a positive output and is predominantly used in systems that require a stable output with minimal drift in volt-amps. The internal temperature of the FMU-12R is monitored and regulated, making it ideal for long term operation in a wide variety of applications.

Application field

The FMU-12R Rectifier can be used in a wide variety of applications including air conditioning, HVAC, lighting systems, UPS systems, inverters, and solar systems. In addition to providing a stable output, this device is capable of suppressing up to several hundred volts of transient voltages that can cause damage to other components. This makes it ideal for use in systems that are exposed to electrical noise.

The FMU-12R can also be used in automotive applications, such as lighting and audio systems, due to its low leakage current and low voltage drop-out characteristics. Additionally, it can be used in projects that require the rectification of high frequency power signals, due to its ability to suppress high frequencies up to several hundred kHz.

Working principle

The FMU-12R is composed of three thyristors, connected in series. The device is designed to provide a positive output voltage, and is triggered into conduction when the gate signals are turned on. The device then acts as a single phase full wave rectifier, providing an output voltage when the anode is connected to a higher potential than the cathode.

When the input is triggered, the three thyristors are turned on in sequence. This allows the device to provide a steeper output voltage than other rectifier technologies. The device then cycles between the “on” and “off” states, providing a clean, stable output voltage. The FMU-12R has a diode in parallel with the 3 thyristors which ensures a minimum voltage drop when the thyristors are off, resulting in efficient operation.

Conclusion

The FMU-12R serves as an efficient and reliable rectifier device, and is suitable for many applications that require a clean, stable output voltage. It is particularly useful in applications that involve high voltage transients or high frequency signals, due to its ability to suppress both. Additionally, due to its low leakage current, the FMU-12R is also suitable for automotive applications.

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