Torque Speed Control T6 App for Electrified Auxiliaries

What is a T6 App?

The KEB T6 Auxiliary Inverter offers several useful application programs, or “apps,” that simplify inverter setup and the implementation of CAN J1939 communications. An app is an interface that manages communications and functionality between a vehicle ECU and the inverter controlling an auxiliary. Different apps can be implemented for each auxiliary based on the level of operational complexity and flexibility required.

Read More: What is the T6 App Pool? 

Understanding the Torque/Speed Control App

This article explores the “Torque/Speed Control” (TSC) app. The TSC app is generic because it can be used for practically any type of auxiliary (pump, compressor, etc.) where speed and/or torque must be variably controlled. The app comes with pre-configured J1939 transmit and receive messages, allowing for immediate communication and control of the motors right out of the box. This makes startup quick and easy. 

The TSC App From a Communications Standpoint

The TSC app simplifies communications setup by pre-defining the message structures and automatically configuring the inverter process channel data mappings. The Rx data channel contains an intuitive layout for the control mode selection and setpoint settings, while the Tx data channel includes typical diagnostics parameters. Messages utilize the CAN J1939 protocol (PropB), and the assigned PGNs are adjustable as needed.

If more diagnostics are needed than what is provided in the default configuration, two additional transmit channels can be used, which are configurable (as seen in the image below). Any parameters within the inverter can be directly assigned to these channels.

The TSC App From an Operational Standpoint

The TSC app also simplifies setup by automatically configuring the inverter parameter settings according to the control mode selected. Three modes can be chosen: velocity mode, torque mode, or a mixed torque/speed mode.

• Velocity mode: uses the set velocity command to control the motor speed.
• Torque mode: only uses the max. torque command to limit the motor torque.
• Mixed mode (velocity/torque): uses both the set velocity command and the max. torque command. The inverter will drive the motor to the set velocity but limit the output torque to the max. torque limitation.

Conclusion

In short, the TSC app excels in applications requiring variable speed and/or torque control, and a pre-configured setup is desired. If you have any questions about which app is right for you, please get in touch with a KEB Applications Engineer to discuss your application.