Method for dynamic compensation for the offset error of an acquisition system comprising a current sensor

A method for dynamic compensation for the offset error of an acquisition system comprising a current sensor arranged to measure or estimate a current passing through an actuator of an electrical apparatus that is electrically powered by an AC voltage, said acquisition system having a predetermined offset value, and said method comprising:

• determining a plurality of periodic temporal operating ranges of the actuator to dynamically apply a compensation sequence for the offset error of the acquisition system,
• executing the compensation sequence during any one of the plurality of determined temporal operating ranges,
• the synchronization between the any one of the determined temporal operating ranges of the actuator and the execution of the compensation sequence being performed using synchronization means comprising a synchronization module arranged to identify reference times from the AC supply voltage of the sector, the compensation sequence comprising:
• shutting off the electrical power supply to the actuator so as to interrupt the passage of current in the current sensor,
• waiting for a predetermined period at the end of which it is considered or expected that current is no longer passing through the current sensor,
• measuring an actual offset value of the acquisition system,
• considering the actual offset value as the new offset value of the acquisition system,
• electrically powering the actuator so as to ensure the passage of current in the current sensor,
• using the new offset value of the acquisition system to control the actuator.