The present invention relates to a method of controlling an electro-thermal heating system in a wind turbine blade, comprising measuring a supply voltage to the electro-thermal heating system, determining a duration of a variable time based enforced off period based on the measured supply voltage, and inserting the variable time based enforced off period between subsequent switching duty cycles that controls the electro-thermal heating system. The present invention also relates to a wind turbine that comprises one or more wind turbine blades wherein each wind turbine blade comprises an electro-thermal heating system and a processor adapted to perform the method.

There is provided a method of compensating for changes to a solid aerosol-forming substrate during heating of the substrate by a heating element over a period containing a first plurality of user puffs and a second plurality of user puffs, the changes including warming of the substrate and depletion of the substrate, the method including: compensating for the warming of the substrate by reducing heating of the heating element during the first plurality of user puffs; and after compensating for the warming of the substrate, compensating for the depletion of the substrate by increasing heating of the heating element during the second plurality of user puffs. There is also provided a system for compensating for changes to a solid aerosol-forming substrate during heating of the substrate by a heating element over a period containing a first plurality of user puffs and a second plurality of user puffs.

Disclosed herein are methods and systems to vaporize extract, plant material containing organic material and the like, including a removable carriage with a chamber having an annular wall with and an open side within the removable carriage. The chamber having at least one intake inlet fluidly connected with the chamber and at least one outlet configured to connect the chamber to an inhalation opening. The carriage fits into a base which includes a controller and power supply. The base provides at least two heating elements oriented to cover the open side of the chamber when the carriage is fully inserted, an insulator separating the two heating elements; and, two temperature sensors each one in thermal contact with a heating element and in signal communication with the controller.

Disclosed herein are methods and systems to vaporize extract, plant material containing organic material and the like utilizing convection heating via one or more manifolds each in fluid communication with a section of chamber containing organic material. The manifolds may be valved and may contain temperature sensors.

A method of controlling an aerosol-generating device including a heater, the method including, over a period of more than 30 seconds, and independent of whether a user is puffing on the device or not: heating the heater to a first temperature, then heating the heater to a second temperature lower than the first temperature, and then heating the heater to a third temperature higher than the second temperature. There is also provided an aerosol-generating device including a heater and a controller; and there is also provided a system including the aerosol-generating device.

A cooking device includes a housing including a non-ferromagnetic surface and a lower shell positioned below the non-ferromagnetic surface. The cooking device also includes an induction cooking coil, a battery assembly configured to provide power to the induction cooking coil via a circuit board assembly, and a heat sink surrounding the battery assembly and the circuit board assembly. The induction cooking coil, the battery assembly, and the circuit board assembly are enclosed by the housing. The cooking device also includes a controller operatively coupled to the circuit board assembly and configured to switch from usage of a first driver circuit of the circuit board assembly to a second driver circuit of the circuit board assembly to power the induction cooking coil.

A method of controlling heating of hot melt adhesive within a hot melt dispensing system includes receiving input AC electric power, determining on a half cycle-by-half cycle basis which heaters in a plurality of zones will receive AC electric power during the next half cycle, and distributing the AC electric power to the heaters on a time sharing basis.

A toaster includes an activation element, a power circuit, a heating device and a control device. When the activation element is moved to turn on the power circuit, the control device is powered such that an electromagnet is activated to attract a retaining element to hold the activation element and to actuate a two-state switch, which allows passage of electrical power to the heating device. After a time interval has elapsed, the control device stops the electromagnet from attracting the retaining element such that the retaining element no longer actuates the two-state switch, which cuts off electric power provided to the heating device.

Provided is an aerosol generating device which is capable of stopping aerosol generation at an appropriate timing. This aerosol generating device includes a power source which supplies power in order to atomize an aerosol source and/or heat a flavor source; a sensor which outputs a measurement value for controlling the power supplied; and a circuitry which controls the power supplied from the power source on the basis of the measurement value. The circuitry controls to increase a power supply amount per unit time in response to a first condition that the measured value is equal to or larger than a first threshold being satisfied, and to decrease the power supply amount per unit time in response to a second condition that the measured value is less than a second threshold greater than the first threshold and a third condition which is different from the first condition and the second condition being satisfied.

A method of controlling aerosol production in an aerosol-generating device is provided, the device including: a heater including a heating element to heat an aerosol-forming substrate, and a power source to provide power to the element, the method including: providing power to the element; and controlling the power provided such that in a first phase, the power is provided to the element such that a temperature of the element increases from an initial temperature to a first target temperature, in a second phase, the power is provided such that the temperature reduces to a second target temperature lower than the first temperature, and in a third phase, the power is provided such that the temperature increases to a third temperature, the first phase being ended in response to the element reaching the first target temperature or at a predetermined time following the element reaching the first target temperature.