Traction Converter Cubicle Overview

A fully assembled unit located in the high-voltage compartment of the motor coach that houses the Traction Control Unit (TCU). It converts AC or DC power for traction motors.

The standard voltage that the traction converter is designed to operate with. This can be both AC and DC.

The acceptable range of AC or DC voltage that the traction converter can handle without damage.

The standard voltage in the DC link circuit, which connects the chopper module to the inverter.

A module responsible for transforming AC input from the transformer into a controllable DC voltage for the DC link circuit. It can control both positive and negative current flow.

Converts DC voltage from the DC link into AC voltage to power the traction motors. It uses IGBT switches and adjusts the output voltage by changing the pulse width.

A module used for regenerative braking. It discharges the DC link circuit in case of over voltage, helping to protect the system.

Insulated Gate Bipolar Transistor. A type of semiconductor switch used in power electronics, like in the traction converter.

The Siemens Traction Control Unit (TCU) that controls and monitors the overall operation of the traction converter.

A key part of the traction converter, responsible for connecting the 4QC module to the PWM inverter. This circuit contains capacitors for smoothing the voltage.

Protects the converter from high inrush current by gradually charging the DC link capacitor before the main contactor is closed.

Electromagnetic switches that connect or disconnect the traction converter to the transformer or DC line.

Limits the charging current during the pre-charging process, preventing damage to the capacitors.

Control the flow of current during pre-charging, allowing the capacitor to reach a safe voltage before the main contactor is closed.

To dissipate the heat generated by the IGBT modules and other electrical components, ensuring the converter operates reliably.

Ensures that all the components within the traction converter cabinet receive adequate cooling, preventing overheating and malfunctions.

IGBT Modules, Line Filter Choke, Contactors, Capacitors, Blower Motors, SIBAS 32S control unit, Transducers, and Resistors.

Act as high-speed switches in the 4 Quadrant Choppers and PWM Inverters. They control the flow of current and voltage.

SP1500FL for single-parallel use in 4QCs and SD1500FL for double-parallel use in PWM inverters, to match the specific requirements of each module.

Reduces voltage fluctuations and noise in the DC link circuit, ensuring a smooth and stable power supply.

Used to connect or disconnect different parts of the traction circuit. These are electrically controlled switches.

They are designed for specific tasks, such as handling high DC current or AC voltage. They also have different power ratings.

Smooth out voltage variations in the DC link circuit, ensuring a stable voltage for the inverter.

They are connected in parallel to increase the overall capacitance, boosting the energy storage capacity and smoothing out voltage variations more effectively.

Convert electrical signals into a measurable quantity, for example, converting current to voltage for monitoring purposes.

Filters out unwanted electrical noise and fluctuations from the power supply, providing a clean and stable power source for the SIBAS 32S control unit.

Monitors the temperature of the air entering the traction converter cabinet, providing feedback for the cooling system.

Limit the charging current during the pre-charging process, ensuring the DC link capacitor is charged safely and efficiently.