A power supply system for electric vehicle comprising; power; a first power line; and a second power line; wherein the output of the high voltage side from the power line is fed to the high voltage side of each of the first power line and the second power line, the output of the low voltage side from the power line is fed to the low voltage said of each of the first power line and the second power line, the first power line and the second power line are connected at their far ends and a power supply system for electric vehicle that supplies electric power to an electric vehicle by means of said first power line or said second power line. the first power line and the second power line have a bypass line that interconnects from the power to the connection at the far end.

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).

A method for a dynamic inductive wireless power transmission includes providing an AC/DC power converter that receives three-phase power and provides regulated DC output current, connecting a trunk cable to the AC/DC power converter output and to multiple power transmitter modules. The trunk cable connects inputs of the power transmitter modules in series. The power transmitter modules transmit inductive wireless power over an air gap. The method includes providing a system controller that detects a vehicle containing a receiver coil and confirms if the vehicle should receive the inductive wireless power from the multiple power transmitter modules, and includes configuring the system controller to communicate with the AC/DC power converter to maintain the regulated DC output current at a constant value and transmit the inductive wireless power to the vehicle through the multiple power transmitter modules when the vehicle should receive the inductive wireless power.

A method for a dynamic inductive wireless power transmission includes providing an AC/DC power converter that receives three-phase power and provides regulated DC output current, connecting a trunk cable to the AC/DC power converter output and to multiple power transmitter modules. The trunk cable connects inputs of the power transmitter modules in series. The power transmitter modules transmit inductive wireless power over an air gap. The method includes providing a system controller that detects a vehicle containing a receiver coil and confirms if the vehicle should receive the inductive wireless power from the multiple power transmitter modules, and includes configuring the system controller to communicate with the AC/DC power converter to maintain the regulated DC output current at a constant value and transmit the inductive wireless power to the vehicle through the multiple power transmitter modules when the vehicle should receive the inductive wireless power.

Systems and methods are disclosed for wireless powering and control of conveyors on shuttles. An example system may include a track, and a shuttle configured to move along the track, the shuttle having a conveyor, and a first induction coil. The system may include a second induction coil disposed at a first location along the track, where the second induction coil is configured to interact with the first induction coil to power the conveyor. The shuttle may not have an onboard power source coupled to the conveyor.

Systems and methods are disclosed for wireless powering and control of conveyors on shuttles. An example system may include a track, and a shuttle configured to move along the track, the shuttle having a conveyor, and a first induction coil. The system may include a second induction coil disposed at a first location along the track, where the second induction coil is configured to interact with the first induction coil to power the conveyor. The shuttle may not have an onboard power source coupled to the conveyor.

An autonomous electronic bicycle comprises a frame, a front wheel that can be powered by a first electronic motor, a rear wheel that can be powered by a second electronic motor, and handlebars that can steer the front wheel which can be controlled by a third electronic motor. The autonomous electronic bicycle can operate autonomously, traveling to a chosen destination. When operating autonomously the autonomous electronic bicycle can shift between a set of balance modes, including a mode used when moving and a mode used when stationary but balanced. To transition between modes, a transition sequence of control commands can be selected and used.

A method for controlling a current being fed to a battery pack including a plurality of battery cells connected in series and providing an output battery voltage includes the steps of: feeding a relatively low current through a resistor being arranged in series with the battery pack; and measuring the voltage across the resistor, thereby obtaining a value of the current. A system for controlling a current being fed to a battery pack is also provided.

A vehicle includes a converter with a connection on the input side for a vehicle-integrated or vehicle-external supply network and which can generate a DC voltage on the output side; and an internal DC network which can be operated using the DC voltage of the converter. A standby power supply device is connected between the converter and the internal DC network. The input voltage of the standby power supply device is formed directly or indirectly by the DC voltage of the converter and the standby power supply device feeds its input voltage or alternatively an auxiliary operating voltage supplied by a stored energy source into the internal DC network as output voltage. The vehicle has a monitoring device which is configured to process at least three control signals.

A vehicle includes a converter with a connection on the input side for a vehicle-integrated or vehicle-external supply network and which can generate a DC voltage on the output side; and an internal DC network which can be operated using the DC voltage of the converter. A standby power supply device is connected between the converter and the internal DC network. The input voltage of the standby power supply device is formed directly or indirectly by the DC voltage of the converter and the standby power supply device feeds its input voltage or alternatively an auxiliary operating voltage supplied by a stored energy source into the internal DC network as output voltage. The vehicle has a monitoring device which is configured to process at least three control signals.