Nagares, S.a.

Nagares, S.a., Universidad Politecnica De Valencia

Herminio Navalon Carretero

Jaime Alberto Broatch Jacobi

Jos&eacute; Maria Desantes Fernandez

Incorporates at least one thermal switch () in series with the heating resistor () of the module located on the frame () of said resistors () that cuts off current to the resistor () when the heater power control circuit fails. The thermal switch () can be between the heating resistor () and the earth connection of the support (), or between the heating resistor () and the power supply () of the module. The module allows a closed-loop control using as variable the temperature of one of the resistors (), whose resistivity can change with the temperature. Similarly, the electronic control circuit can also be integrated in the heater frame (), allowing a closed-loop control of the dissipated power using as control variable the temperature of the frame ().

Heater module for the admission gases of an automobile engine with an overheating protection and/or closed-loop regulation

Disclosed is an electronic pulse width modulation (PWM) regulator of a low frequency rectangular wave signal serving to control the speed of a direct current motor. The invention aims at simplifying the design of said regulator by eliminating the classical inductive element so that the motor continuously operates as a filter of the output signal provided by the switching component. The invention also aims at preventing noises caused by switching. To this end, subsonic switching frequencies of less than 50 Hz are used.

Speed regulator by pulse width modulation for direct current motors

Electrical resistances to carry out heating of air necessary for the combustion process of an engine, each of said resistance being in continuous tape form, with a pronounced coiled trajectory so that the resistance is distributed uniformly in an orifice for the passage of air established in a support and has its larger faces located in imaginary planes parallel to the axis of said orifice so that the electrical resistance presents its front rim to the passage of the air with a minimum loss of head, while presenting a wide contact surface to the air. The resistance is fastened to the support in arched recesses defined in diametrically opposed areas of said support, with the interposition of respective ceramic insulators being connected to ground by one of its ends and by its other end to the electricity supply cable.

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Motilla del Palancar, Spain

Herminio Navalon Carretero