TRACTION VOLTAGE SYSTEM IN A VEHICLE AND METHOD FOR CONTROLLING SUCH A SYSTEM

摘要

A traction voltage system in a vehicle includes a junction box with multiple connectors for electrical components, which components include electrical supplies and electrical loads, and an electronic control unit arranged to monitor current flowing flow to or from the components. A controller or a circuit breaker is arranged to control the supply of power to each respective component, and at least all but one of the connectors are provided with a current sensor arranged to transmit a signal representing detected current values to the electronic control unit. The electronic control unit is arranged to determine an instantaneous current value flowing to or from each component, to compare the instantaneous current value with a predetermined limit value for each connector, and to take action in response to the comparison. A method for controlling the traction voltage system is also provided.

主权项

1. Traction voltage system in a vehicle, which system comprises a junction box with multiple connectors for electrical components, which components comprise electrical supply means and electrical loads; a traction motor (14) connected to the junction box via a power electronics converter;
an electronic control unit arranged to monitor current flowing flow to or from the electrical components, and a controller or a circuit breaker arranged to control the supply of power to each respective component; wherein at least all but one of the connectors are provided with a current sensor arranged to transmit a signal representing detected current values to the electronic control unit; and which electronic control unit is arranged to determine an instantaneous current value flowing to or from each component; wherein the electronic control unit is arranged to compare the instantaneous current value with a predetermined limit value for each connector; that the electronic control unit is arranged to control the controller or the circuit breaker of the respective components in response to the comparison; and that the electronic control unit is arranged to limit the current to or from a component if the instantaneous current through a connector exceeds a first predetermined limit for power usage for that connector, and to interrupt the current if the instantaneous current exceeds a second predetermined limit.