Abstract: Provided herein is a system including a resistor grid having a resistor element and a sensor configured to sense a condition indicative of a temperature of the resistor element. The system also includes a processing circuit comprising memory communicably coupled to one or more processors. The memory stores instructions that, when executed by the one or more processors, causes the processing circuit to determine a speed of an electric drive machine as resistive braking is applied to the electric drive machine, determine the temperature of the resistor element of the resistor grid as the resistive braking is applied to the electric drive machine, calculate, in response to the temperature satisfying a temperature threshold, a maximum resistive braking speed, and apply the maximum resistive braking speed to a governor of the electric drive machine to prevent the electric drive machine from exceeding the maximum resistive braking speed.

Abstract: Systems, apparatuses, and methods for a modular resistor grid system include a mount and a plurality of modular resistor grid assemblies that interchangeably couple to the mount. At least two modular resistor grid assemblies are in the plurality. Each has a housing and a plurality of resistor plates. Each housing has input and output terminals. Each plurality of resistor plates is connected between the input and the output terminal of a housing. Each resistor plate has a thickness, and each plurality of resistor plates provides a target electrical resistance for a modular resistor grid assembly. A first modular resistor grid assembly has a first number of resistor plates with a first thickness. A second modular resistor grid assembly has a second number of resistor plates with a second thickness. The first number of resistor plates is greater than the second number. The first thickness is greater than the second thickness.

Abstract: Systems, apparatuses, and methods relate to modular resistor grid assemblies having a “black box” resistance. The modular resistor grid assemblies include a first plurality of first resistor plates having a first thickness disposed within a first housing. The first housing has a first input and output terminal. The first resistor plates provide a target electrical resistance between the first input output terminal. A second plurality of second resistor plates having a second thickness smaller than the first thickness is disposed within a second housing. The second housing has a second input and output terminal. The second resistor plates provide the target electrical resistance between the second input and output terminal. The first and second housing interchangeably couple to a resistive braking system. The first plurality includes a first number of first resistor plates, and the second plurality includes a second number of second resistor plates less than the first number.