Title:
METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE OF AN ELECTRIC HEATER THAT FUNCTIONS WITH A POSITIVE TEMPERATURE COEFFICIENT (PTC) HEATING ELEMENT
Document Type and Number:
WIPO Patent Application WO2002045985
Kind Code:
A3
Abstract:
The invention relates to a method for stabilizing the temperature of an electric heater, particularly a motor vehicle auxiliary heater, that functions with a positive temperature coefficient (PTC) heating element. The aim of the invention is to stabilize the temperature at a set value, which is less than the temperature at which the PTC heating element would stabilize itself in the existence of a predetermined nominal voltage of a voltage source, by controlling the current by: determining, as an actual value, the intensity of the current flowing through the PTC heating element at the moment; comparing the actual value with a set value of the current intensity which, in the selected PTC heating element, is determined by the selected set temperature, and; controlling, as a set variable, the voltage applied to the PTC heating element in the temporal mean according to the deviation of the actual value from the set value of the current intensity.
Inventors:
REILING NORBERT (DE)
UHL GUENTER (DE)
NECKEL KLAUS (DE)
STARCK ROLAND (DE)
ERBACHER FRANK (FR)
UHL GUENTER (DE)
NECKEL KLAUS (DE)
STARCK ROLAND (DE)
ERBACHER FRANK (FR)
Application Number:
PCT/EP2001/014312
Publication Date:
December 27, 2002
Filing Date:
December 06, 2001
Export Citation:
Assignee:
BERU AG (DE)
REILING NORBERT (DE)
UHL GUENTER (DE)
NECKEL KLAUS (DE)
STARCK ROLAND (DE)
ERBACHER FRANK (FR)
REILING NORBERT (DE)
UHL GUENTER (DE)
NECKEL KLAUS (DE)
STARCK ROLAND (DE)
ERBACHER FRANK (FR)
International Classes:
B60H1/00; B60H1/22; G05D23/24; H05B1/02; (IPC1-7): H05B3/14; H01C7/02; B60H1/22; B60H1/00
Foreign References:
| EP1157869A2 | 2001-11-28 | |||
| US4926025A | 1990-05-15 | |||
| US5275012A | 1994-01-04 | |||
| EP0837381A2 | 1998-04-22 | |||
| US5279459A | 1994-01-18 | |||
| EP0901311A2 | 1999-03-10 | |||
| DE4404345A1 | 1994-08-25 | |||
| US6072153A | 2000-06-06 | |||
| US6118099A | 2000-09-12 | |||
| EP1026020A1 | 2000-08-09 | |||
| DE19833201A1 | 2000-01-27 | |||
| DE19706199A1 | 1998-08-20 | |||
| DE19728589C1 | 1998-11-05 | |||
| DE19848169A1 | 1999-05-06 | |||
| EP0288085A2 | 1988-10-26 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 012, no. 494 (P - 805) 23 December 1988 (1988-12-23)
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