The invention relates to a resistor (1), in particular a thick-film resistor, in particular for a high-voltage system (2) of a motor vehicle, having a nominal power of at least 10 watts, comprising: at least two electrical resistor terminals (8a, 8b); a ceramic substrate (5); and a resistor element (3) which is electrically provided between the two resistor terminals (8a, 8b) and which is made of a thick-film material (4) applied to the ceramic substrate (5), the resistor element (3) having a temperature coefficient (TCR). In order to make it easier to monitor discharge via the resistor (1), according to the invention the temperature coefficient (TCR) is >700 ppm/K, in particular >1000 ppm/K.
H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
H01C 7/06 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material including means to minimise changes in resistance with changes in temperature
H01C 17/065 - Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick-film techniques, e.g. serigraphy
H01C 7/02 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
A power resistor is disclosed, having at least one electrical connection, having a carrier substrate, which has at least one resistor element composed of a thick-film material and at least one contact electrode to which the resistor element electrically connects, having at least one electrical conductor, which is soldered to the contact electrode and produces an electrical connection between the contact electrode and the electrical terminal, and having a housing, which is at least partially filled with at least one casting compound and in which the resistor element and contact electrode are encapsulated, with the electrical conductor protruding out through the casting compound. In order to achieve a simply designed and easy-to-use power resistor, it is proposed for a pin, in particular a soldering pin or press-fitting pin, to constitute the electrical conductor, which pin is placed onto the contact electrode and soldered to it and constitutes the electrical terminal of the power resistor.
H01C 1/144 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the terminals or tapping points being welded or soldered
The invention relates to a power resistor (1) having electrical connection points (6.1, 6.2), comprising at least one resistor housing (2), which is potted with potting compound (26.1) and which forms at least one resistance element (3), in particular from a thick-film material, and which forms a first contact surface (5) for a heat sink (27) on a first outer face (2.1), and comprising an electronic circuit (9) for diagnosing and/or monitoring the power resistor (1). In order to increase the stability of the power resistor, according to the invention, the power resistor has a slide-on housing (10), which is designed to mechanically connect, in particular releasably, to the resistor housing (2) in such a way that the first contact surface (5) is kept free and which accommodates the circuit (9) in an encapsulating manner.
The invention relates to a power resistor (1) having at least one electrical connection (2.1, 2.2, 2.3) having a carrier substrate (3), which has at least one resistor element (4.1, 4.2) made of a thick film material and at least one contact electrode (5.1, 5.2, 5.3), to which the resistor element (4.1, 4.2) electrically connects, having at least one electrical conductor (7.1, 7.2, 7.3), which is soldered to the contact electrode (5.1, 5.2, 5.3) and produces an electrical connection between the contact electrode (5.1, 5.2, 5.3) and the electrical connection (2.1, 2.2, 2.3), and having a housing (8), filled at least in part with at least one casting compound (17), which receives the resistor element (4.1, 4.2) and contact electrode (5.1, 5.2, 5.3) in a cast manner, wherein the electrical conductor (7.1, 7.2, 7.3) protrudes through the casting compound (17). In order to create a power resistor (1) having a simple design and which is easy to handle, according to the invention, a pin, in particular a solder or press fit pin, forms the electrical conductor (7.1, 7.2, 7.3), said pin (9.1, 9.2, 9.3) being placed on the contact electrode (5.1, 5.2, 5.3) and soldered thereto, and forms the electrical connection (2.1, 2.2, 2.3) of the power resistor (1).
H01C 1/144 - Terminals or tapping points specially adapted for resistorsArrangements of terminals or tapping points on resistors the terminals or tapping points being welded or soldered
H05K 1/16 - Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
H05K 3/40 - Forming printed elements for providing electric connections to or between printed circuits
H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
H01C 1/012 - MountingSupporting the base extending along, and imparting rigidity or reinforcement to, the resistive element
H01C 1/084 - Cooling, heating or ventilating arrangements using self-cooling, e.g. fins, heat sinks
H01C 3/12 - Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids the resistive element having zig-zag or sinusoidal configuration lying in one plane
09 - Scientific and electric apparatus and instruments
Goods & Services
Electric power controllers; resistors; resistances, electric; voltage dividers; voltmeters; voltage-to-current converters; all of the aforementioned goods not in connection with wireless systems comprising UHF or wireless transmitters or receivers
The invention shows a high-power resistor (1, 100) having a housing (10), having a sheet resistor (2) which is arranged in the housing (10) and is provided on an electrically insulating carrier substrate (14), and having a potting compound (11) in the housing (10), wherein the housing (10) is filled with the potting compound (11). In order to ensure a high operational reliability for said resistor despite electrical protection, it is proposed that the high-power resistor (1) has, in the housing (10), both a fireproof cover (12) and a fuse (4) with a fuse wire (5) which is electrically connected in series with the sheet resistor (2), and that the fireproof cover (12) provided between the fuse wire (5) and the housing (10) is provided on the fuse wire (5) projecting into the potting compound (11).
H01H 85/02 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive Details
H01C 1/028 - HousingEnclosingEmbeddingFilling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
