Operating procedure related to a resistance heating element and device for applying same
AssigneeRobert Bosch GmbH
InventorsCornelius Peter, Kurt Ingrisch, Thomas Weigold, Guenther Riehl
Life of this patent
Estimating the term…
Abstract
A method of operating a resistance heating element and a device for carrying out the method are described. During a first step, the resistance of a resistor of the resistance heating element is determined at a known base temperature. In a second step, the resistance setpoint value is determined as a function of resistance of the resistor at the known base temperature and known temperature coefficients. The resistance heating element is activated by approximately setting the resistance setpoint value in order to heat the resistance heating element to the given setpoint temperature.
Claims14
A method of operating a resistance heating element, the resistance heating element having a resistance and being heated to a predefined setpoint temperature, the method comprising the steps of:
- determining the resistance of the resistance heating element at a predetermined base temperature;
- determining a resistance setpoint value as a function of the determined resistance at the predetermined base temperature and a predetermined temperature coefficient using a variable resistance arrangement and a measuring arrangement, the variable resistance arrangement being for coupling to a terminal of the measuring arrangement and the resistance heating element being for coupling to another terminal of the measuring arrangement;
- and
- activating the heating element by approximately setting the determined resistance setpoint value to heat the resistance heating element to the predefined setpoint temperature.
A device for operating a resistance heating element, the resistance heating element including a resistor and being heated to a predefined setpoint temperature, the device comprising:
- a measuring arrangement having a terminal coupled to the resistance heating element;
- a variable resistor;
- a signal processing unit coupled to the measuring arrangement and determining a resistance of the resistor of the resistance heating element at a predetermined base temperature using the variable resistor, a resistance setpoint value being determined as a function of the determined resistance and a predetermined temperature coefficient, the resistance setpoint value being set using the variable resistor, the variable resistor being coupled at one end to the signal processing unit and at another end to another terminal of the measuring arrangement;
- and
- an open-/closed-loop control unit receiving the resistance setpoint value corresponding to the predefined setpoint temperature.
A device for operating a resistance heating element, the resistance heating element including a resistor and being heated to a predefined setpoint temperature, the device comprising:
- a variable resistor including a plurality of resistors;
- and
- a signal processing unit coupled to the resistance heating element and determining a resistance of the resistor of the resistance heating element at a predetermined base temperature using the variable resistor, a resistance setpoint value being determined as a function of the determined resistance and a predetermined temperature coefficient, the resistance setpoint value being set using the variable resistor, wherein each of the plurality of resistors is activatable by the signal processing unit.
An apparatus for use in operating a resistance heating element, the apparatus comprising:
- means for providing a variable resistance;
- means for determining a resistance of the resistance heating element at a base temperature;
- means for determining a resistance setpoint based on the resistance at the base temperature and a temperature coefficient;
- and
- means for setting the resistance setpoint for heating the resistance heating element to a setpoint temperature.
An apparatus for use in operating a resistance heating element, the apparatus comprising:
- means for providing a variable resistance;
- and
- means for determining a base temperature resistance of the resistance heating element and for providing a determined resistance, for determining a resistance setpoint based on the determined resistance and a temperature coefficient, and for setting the resistance setpoint using the means for providing a variable resistance.
Dependencies are inferred from the claim text.