Patent ID: 11946957
Assignee: SIEMENS AKTIENGESELLSCHAFT
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A current sensor unit, comprising:
a rectification module, configured to convert an AC current to a pulsed DC current;
a power source conversion module including an energy storage element, the power source conversion module connected to the rectification module, configured to store energy for the energy storage element based upon the pulsed DC current during operation in a charging mode and configured to generate a power supply current based upon a voltage of the energy storage element;
a mode switching module connected to the rectification module, the mode switching module configured to be bypassed by the power source conversion module during operation in the charging mode, and configured to bypass the power source conversion module during operation in an energy release mode;
a current sensor module, an output of the current sensor module connected to the rectification module and an input of the current sensor module connected to the power source conversion module and the mode switching module, separately, the current sensor module configured to detect a pulsed DC current flowing back from the power source conversion module or a pulsed DC current flowing back from the mode switching module;
a control module, configured to
acquire electrical energy from the power supply current,
determine that operation is in the charging mode or the energy release mode based upon the voltage of the energy storage element, and
acquire a first detection value provided by the current sensor module and relating to a pulsed DC current; and

a self-calibration module configured to generate a current flowing through the current sensor module in a self-calibration process;
wherein the current sensor module is further configured to detect the current flowing through the current sensor module in the self-calibration process; and
wherein the control module is further configured to calibrate the first detection value based on a second detection value provided by the current sensor module and relating to the current flowing through the current sensor module in the self-calibration process.