Abstract: A motor drive system (300) for controlling an operation of an electric machine (330) on construction equipment (100), the system comprising a frequency converter (320) and a control unit (340), where the frequency converter (320) is arranged to receive electrical power from electrical mains (310) over a first electrical interface (160) at a first AC frequency and to convert the first AC frequency into a second AC frequency for output on a second electrical interface (326) to the electric machine (330), where the control unit (340) is arranged to control (360) the frequency converter (320) to generate the second AC frequency in dependence of a configurable maximum current to be drawn over the first electrical interface (160).

Abstract: A diesel fuel control system is provided for a hybrid electric vehicle. The system may include a control unit and an ambient air temperature sensor connected to the control unit. The control unit may be arranged to store information about a cold filter plugging point temperature of fuel. The system may include a connection from a velocity sensor of the vehicle to the control unit and a connection from a diesel temperature sensor. The control unit may be arranged to calculate the temperature of fuel in a fuel filter based on information from the temperature sensors and the velocity sensor, and may be arranged in connection with an engine control unit such that an internal combustion engine is arranged to start if the calculated temperature of the fuel is below the cold filter plugging point.

Abstract: A diesel fuel control system is provided for a hybrid electric vehicle. The system may include a control unit and an ambient air temperature sensor connected to the control unit. The control unit may be arranged to store information about a cold filter plugging point temperature of fuel. The system may include a connection from a velocity sensor of the vehicle to the control unit and a connection from a diesel temperature sensor. The control unit may be arranged to calculate the temperature of fuel in a fuel filter based on information from the temperature sensors and the velocity sensor, and may be arranged in connection with an engine control unit such that an internal combustion engine is arranged to start if the calculated temperature of the fuel is below the cold filter plugging point.