Abstract: An ohmic heater for heating a food product, including: a rectifier (2) for rectifying the supply voltage; an inverter (3) including controlled switches (30); a pair (4) of electrodes that can be positioned in contact with the food product to be heated, said inverter (3) being operatively interposed between the rectifier (2) and the pair (4) of electrodes; a device (5) for determining an oscillating voltage (X) generated by the rectifier (2); a system (800) for regulating the closing duration of the switches (30) of the inverter (3) at least as a function of the corresponding voltage (X) generated by the rectifier (2) and determined at a given time instant by the device (5) for determining an oscillating voltage (X).

Abstract: An ohmic heater for heating a food product, comprising: —a rectifier (2) for rectifying the supply voltage; —an inverter (3) comprising controlled switches (30); —a pair (4) of electrodes that can be positioned in contact with the food product to be heated, said inverter (3) being operatively interposed between the rectifier (2) and the pair (4) of electrodes; —means (5) for determining an oscillating voltage (X) generated by the rectifier (2); —a system (800) for regulating the closing duration of the switches (30) of the inverter (3) at least as a function of the corresponding voltage (X) generated by the rectifier (2) and determined at a given time instant by the means (5) for determining an oscillating voltage (X).

Abstract: An ohmic heater for heating a food product, comprising: —an inverter (3) comprising controlled switches (30); —a pair (4) of electrodes that can be positioned in contact with the food product to be heated, said inverter (3) being operatively interposed between a rectifier (2) of the supply voltage and the pair (4) of electrodes; —a transformer (6) located between the inverter (3) and the pair (4) of electrodes for regulating the amplitude of the voltage; —means (7) for determining the continuous component of the current in a zone downstream of the inverter (3) and upstream or at the transformer (6); —a system (800) for regulating the closing duration of the switches (30) of said inverter (3) that operates as a function of the means (7) for determining the continuous component by minimising/suppressing said continuous component.