Circuitry and methods for detecting an electrical fault in power conversion circuitry

Power conversion circuitry configured to detect an electrical fault, the power conversion circuitry comprising:

• switching circuitry configured to control a current flowing along a current path between first and second nodes of the power conversion circuitry;
• a current sensor connected to the current path, the current sensor configured to measure a rate of change of the current flowing along the current path;
• and
• control circuitry connected to the current sensor and the switching circuitry,
• the control circuitry configured to:
• detect an electrical fault if a rate of change of the current measured by the current sensor exceeds a fault threshold, and
• configure the switching circuitry to adjust current flow in the power conversion circuitry when an electrical fault is detected and wherein
• the switching circuitry is configured to control currents flowing along a plurality of current paths between respective pairs of nodes of the power conversion circuitry comprising at least the first and second nodes;
• the power conversion circuitry comprises a plurality of current sensors comprising at least the current sensor, connected to the respective current paths, each current sensor configured to measure a rate of change of the current flowing along its current path;
• the control circuitry is connected between the plurality of current sensors and the switching circuitry, the control circuitry configured to:
• detect an electrical fault if a rate of change of the current measured by one or more of the current sensors exceeds a fault threshold, and
• configure the switching circuitry to control current flow in the power conversion circuitry when an electrical fault is detected.