Abstract: A system for initializing operations of one or more batteries of a lithium-ion battery pack to supply electric power to an electrical load includes a switching device, an output device, and a controller. The switching device is configured to move between a first position to facilitate supply of electric power from the batteries to the electrical load and a second position to restrict supply of electric power from the batteries to the electrical load. The output device is configured to be activated to indicate an availability of the batteries to supply electric power to the electrical load. The controller receives an input, actuates a contactor associated with at least one battery to facilitate electrical connection between the at least one battery and the electrical load, and moves the switching device to the first position to cause an activation of the output device in response to the actuation of the contactor.

Abstract: Systems and methods are disclosed for reducing engine fuel consumption during regenerative braking. According to certain embodiments, the regenerative braking system has an engine, a generator, a rectifier, a first inverter, a traction motor, and a reverse recovery unit. The generator is configured to be driven by the engine to produce AC electrical power. The rectifier is configured to receive AC electrical power from the generator and convert the AC power to DC power. The first inverter is configured to receive the DC power and convert the DC power to AC power. The traction motor is configured to be driven by the AC power in a traction mode, and to produce regenerated power when rotated in reverse in a regenerative braking mode. The reverse recovery unit has a second inverter and a filter.

Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.

Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.

Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.

Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.