A system and a method for controlling a power MOSFET for limiting electromagnetic interference from a load is provided. The system and method include a pulse-width-modulated (PWM) control voltage to operate the power MOSFET in accordance with its Ohmic region (linear mode). By operating the power MOSFET in its Ohmic region, the electromagnetic field generated by the load is reduced, without requiring a dedicated DC/DC converter that would otherwise increase the cost, size, and weight of the power electronics.

A system for heating a fluid and an electromagnetic acoustic transducer EMAT system is provided. Both systems have a drive circuit. The amount of heat and the amplitude (and acceleration) of the vibrations is respectively controllable by controlling an input to a terminal of a switch. The heating system comprises a porous graphite foam conductor which is exposed to an electromagnetic field generated by an oscillating circuit. When exposed, the foam conductor conducts induced electric current which heats the same and a fluid in contact with the conductor. The EMAT system comprises at least one magnet configured to generate a static magnetic field, an oscillating circuit and a working element. The working element, when exposed to the static magnetic field and the electromagnetic field produced by the oscillating circuit, vibrates against a load. The vibrations dry the load.

A cooktop appliance is generally provided herein. The cooktop appliance may include a cooktop panel, an electric heating element, a ferromagnetic tab, and a magnetic temperature switch. The electric heating element may be positioned at the cooktop panel. The electric heating element may include a first terminal and a second terminal. The ferromagnetic tab may be in thermal engagement with the electric heating element. The magnetic temperature switch may be positioned in selective magnetic engagement with the ferromagnetic tab. The magnetic temperature switch may be electrically connected in series with the second terminal and operable to restrict a voltage to the electric heating element above a predetermined temperature.

A system for heating a fluid and an electromagnetic acoustic transducer EMAT system is provided. Both systems have a drive circuit. The amount of heat and the amplitude (and acceleration) of the vibrations is respectively controllable by controlling an input to a terminal of a switch. The heating system comprises a porous graphite foam conductor which is exposed to an electromagnetic field generated by an oscillating circuit. When exposed, the foam conductor conducts induced electric current which heats the same and a fluid in contact with the conductor. The EMAT system comprises at least one magnet configured to generate a static magnetic field, an oscillating circuit and a working element. The working element, when exposed to the static magnetic field and the electromagnetic field produced by the oscillating circuit, vibrates against a load. The vibrations dry the load.

A cooktop appliance is generally provided herein. The cooktop appliance may include a cooktop panel, an electric heating element, a ferromagnetic tab, and a magnetic temperature switch. The electric heating element may be positioned at the cooktop panel. The electric heating element may include a first terminal and a second terminal. The ferromagnetic tab may be in thermal engagement with the electric heating element. The magnetic temperature switch may be positioned in selective magnetic engagement with the ferromagnetic tab. The magnetic temperature switch may be electrically connected in series with the second terminal and operable to restrict a voltage to the electric heating element above a predetermined temperature.

A system and a method for controlling a power MOSFET for limiting electromagnetic interference from a load is provided. The system and method include a pulse-width-modulated (PWM) control voltage to operate the power MOSFET in accordance with its Ohmic region (linear mode). By operating the power MOSFET in its Ohmic region, the electromagnetic field generated by the load is reduced, without requiring a dedicated DC/DC converter that would otherwise increase the cost, size, and weight of the power electronics.