JP2000012302A - Power resistor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely use a power resistor until its heat reaches a high- temperature region even under the condition with vibration, by surely detecting the accumulated temperature of a resistor of a power resistor up to a high- temperature region even in an environment with external vibration. SOLUTION: A combination wherein a temperature-sensing resistor 6 known as a ceramics heater contacts a resistor 2 whose main component is a resistance element 3 is buried and fixed in a case body 10 using an insulating mold material, and thanks to a high heat-resistant characteristics and a large mechanical strength of the temperature-sensing resistor 6, the accumulated temperature of the resistor 2 is converted into a resistance electric signal, up to a high- temperature region, even in an environment with vibration for stable and sure detection, for safety use of a power resistor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power type resistor mainly used for a regenerative current circuit, a charging circuit, and the like of a drive circuit of an electric device.

[0002]

2. Description of the Related Art A power type resistor (mainly a power type cement resistor) is a device in which various shapes and dimensions are processed on the basis of its specifications, and a metal case body is provided with an inorganic electrically insulating powder. A material (quartz etc.) is kneaded with an organic binding material (silicone-based or epoxy-based material) and buried in an insulating mold material. The insulating mold material is solidified by applying a predetermined temperature in this state. It is manufactured by fixing a resistor immovably by solidifying an insulating molding material.

[0003] When excessive power is applied to the power type resistor having such a structure for some reason, the built-in resistor suddenly becomes overheated.
There was a danger that the resistor itself would blow, the resistor would ignite, and even nearby items would be burned.

In order to prevent the occurrence of such an accident, there is a case in which a thermostat or a thermal fuse which operates by sensing the heat of the resistor is provided together with the resistor inside the case body. In the case of an overheating condition exceeding the preset operating temperature, in the former case, the thermostat outputs an alarm signal and performs safety processing such as automatically shutting off the power supply in accordance with the alarm signal. In some cases, the thermal fuse is blown and the circuit is cut off at the power type resistor.

[0005] The one with a built-in thermal fuse can set the operating temperature in a wide temperature range and exhibit high safety. However, once activated, the resistor itself cannot be reused. Because it is economically disadvantageous and the handling process such as replacement of resistors is troublesome, it is used only in special cases, and it is generally equipped with a thermostat that can be reused after operation. It is used.

[0006]

However, in the above-mentioned power type resistor in which the thermostat of the prior art is incorporated, the heat resistant temperature of the thermostat is high even though the heat resistant temperature of the resistor is as high as about 1000 ° C. The low (up to 250 ° C. limit) low temperature limits of such power type resistors are limited to 80 ° C. to 250 ° C., which makes the use of power type resistors extremely uneconomical. was there.

Further, since the thermostat is a contact type structure, there is a problem that the operation stability is impaired by vibration applied from the outside, so that it cannot be used in an environment where vibration is applied.

Since the thermostat is vulnerable to thermal shock, it cannot be mounted close to the resistor. Therefore, if the operating temperature is set at a temperature close to the heat-resistant temperature of 250 ° C. of the thermostat, the resistance becomes a heating element. Due to the heat storage due to the temperature gradient between the body and the thermostat, even if an alarm signal is output at a temperature lower than the heat resistance temperature of the thermostat and the power supply, etc. is shut off, the thermostat will output an alarm signal and then exceed the heat resistance temperature. There has been a problem that heat may be applied, which often causes an accident in which the thermostat is broken and the resistor cannot be reused.

Furthermore, although the thermostat can exhibit high withstand voltage with respect to AC power, the withstand voltage with respect to DC power is extremely low, so that it cannot be used with DC power. there were.

Therefore, the present invention has been made to solve the above-mentioned problems in the prior art, and ensures that the heat generation temperature of a resistor of a power type resistor can be maintained up to a high temperature range even in an environment where external vibration is applied. Is a technical issue,
Accordingly, an object of the present invention is to enable a power type resistor to be used safely even under conditions of vibration until its heat generation reaches a high temperature range.

[0011]

Means for Solving the Problems Among the present invention for solving the above technical problems, the means according to the first aspect of the present invention is to provide a resistance element made of a resistance material made of nickel and chromium or an alloy of copper and nickel. Having a resistor configured as a main body, an insulating base body made of an electrical insulating material such as alumina powder,
Along with this insulating base, it is made of a mixture of high melting point metal powders such as tungsten and molybdenum, has high heat resistance of about 1000 ° C., and has a relatively high resistance temperature in a temperature range of at least 80 ° C. to 800 ° C. A temperature-sensitive element with a coefficient
A structure in which a temperature-sensitive element is covered with an insulating base, and a temperature-sensitive resistor that is integrally sintered and molded. The temperature-sensitive resistor and the resistor are in contact with or close to each other, and are insulated inside the case. Embedding and fixing with a mold material.

The temperature-sensitive resistor is formed by sintering the temperature-sensitive element and the insulating base body together and integrally into a structure in which the temperature-sensitive element is covered with the insulating base body. It has high mechanical strength, that is, structural stability, and because it is embedded and fixed in an insulating mold material together with a resistor, it exhibits great durability against shocks such as external vibrations. As a result, the temperature sensing element performs the temperature detection operation stably and reliably.

Further, since the temperature-sensitive resistor is substantially made of ceramic as a whole, it has high thermal shock resistance and high high-temperature strength. Therefore, the temperature-sensitive resistor comes into contact with or close to the resistor as a heat source. Even if they are arranged, a stable and reliable temperature detection operation is performed without breakage against a rapid rise in temperature of the resistor.

The temperature-sensitive element of the temperature-sensitive resistor is tungsten,
A mixture paste of a metal powder having a high melting point, such as molybdenum, is obtained by sinter molding at a temperature of about 1600 ° C. The composition and molding method are the same as those conventionally used as a heating resistance element. It is.

Since this temperature-sensitive element has a heat resistance of about 1000 ° C., it can safely and accurately detect a temperature within a temperature range of 80 ° C. to 800 ° C. which exhibits a relatively high temperature coefficient of resistance. Perform the operation.

Since the temperature-sensitive resistor is assembled in contact with or close to the resistor, the heat of the resistor is directly or almost directly transmitted to the temperature-sensitive resistor. The generated heat is transmitted to the temperature-sensitive resistor very accurately without any time delay.

According to a second aspect of the present invention, in the first aspect of the invention, a resistor formed of a coil-shaped resistance element is wound around a temperature-sensitive resistor formed in a rod shape or a cylindrical shape. It is added to the fact that the exterior was assembled in a shape.

According to the second aspect of the present invention, since the temperature-sensitive resistor itself functions as a winding core for assembling and holding the coil-shaped resistance element in a fixed form, the temperature-sensitive resistor can be used. In addition to being able to be assembled in contact with the resistance element which is a heat source, an insulating substrate for mounting and holding the resistance element is not required, and the structure of the resistor is correspondingly simplified.

According to a third aspect of the present invention, in the first aspect of the invention, a resistor formed of a coil-shaped resistance element is internally mounted on a cylindrical temperature-sensitive resistor. ,
It is a thing that added.

According to the third aspect of the present invention, since the temperature-sensitive resistor itself functions as an assembly support for the coil-shaped resistance element, the temperature-sensitive resistor is used as a heat source. In addition to being able to be assembled in a contact state, the need for an insulating base for mounting and holding the resistance element is eliminated, and the structure of the resistor is correspondingly simplified.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a resistor is formed by winding a resistance element around a cylindrical insulating substrate made of an electrical insulating material to form a resistor. Inside the body,
This is an addition of the insertion and assembly of a rod-shaped or cylindrical temperature-sensitive resistor.

According to the fourth aspect of the present invention, since the temperature-sensitive resistor faces the resistance element serving as a heat source via the insulating base, the resistance element is accordingly shifted from the temperature-sensitive resistor. Although the heat transfer to the heater is slightly inferior to that of the second and third aspects of the present invention, both the resistor and the temperature-sensitive resistor are finished products that can be handled as a single product. The handling of the resistor and the temperature sensitive resistor in the above is simple and safe.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a resistor is formed by winding a resistive element around a rod-shaped insulating base made of an electrically insulating material and forming a resistor. In addition, it is inserted and assembled in a temperature-sensitive resistor formed into a shape.

According to the fifth aspect of the present invention, it is possible to contactly attach a temperature-sensitive resistor to a resistance element which is a heat source, and to assemble the resistor and the temperature-sensitive resistor when assembling the resistor. Easy handling of body.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a resistor is formed by mounting and fixing a resistor element on a flat insulating base made of an electrically insulating material. In addition, the temperature-sensitive resistors formed in a shape are assembled in a stack.

According to the sixth aspect of the present invention, it is possible to assemble the temperature-sensitive resistor in contact with the resistance element, and to assemble the resistor and the temperature-sensitive resistor by a simple stacking process. Since they do not slide together, they are simple and safe.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a bottom view showing an example of a structure considered to be the simplest of the present invention, in which an insulating mold material 11 is not shown. FIG. 2 is a cross-sectional view taken along line AA in FIG. is there.

In the resistor 1 shown in FIGS. 1 and 2, a resistor 2 composed of a coil-shaped resistor element 3 alone is wound around a temperature-sensitive resistor 6 formed in a straight round bar shape. And a combination of the resistor 2 and the temperature-sensitive resistor 6 is formed, and the combination of the resistor 2 and the temperature-sensitive resistor 6 is connected to a pair of terminal wires 5 of the resistor 2. In a state where the pair of lead wires 9 of the temperature-sensitive resistor 6 are led out, the lead wire 9 is buried and fixed with an insulating molding material 11 in a central portion of a case body 10 made of a metal or ceramic having an open lower surface. It is configured.

That is, the combination of the resistor 2 and the temperature-sensitive resistor 6 is arranged in the center of the case body 10 and
An insulating mold filled in the case body 10 with the pair of terminal wires 5 of the resistor 2 and the pair of lead wires 9 of the temperature-sensitive resistor 6 led out of the case body 10 from one side end wall. Since the material 11 is heated and solidified, and the combination of the resistor 2 and the temperature-sensitive resistor 6 is buried in the insulating mold material 11 and fixedly attached to the central portion in the case body 10. is there.

In the embodiment shown in FIGS. 1 and 2, the winding assembly of the resistor 2 with respect to the temperature-sensitive resistor 6 is lightly tightened by utilizing the elasticity of the resistor 3. In addition to simplifying the configuration of the resistor 2 and ensuring that the temperature-sensitive resistor 6 contacts the resistance element 3, the self-holding of the assembly of the resistor 2 and the temperature-sensitive resistor 6 is also possible. This facilitates handling when assembling the resistor.

Further, the size of the combination of the resistor 2 and the temperature-sensitive resistor 6 is sufficiently small if the outer diameter is slightly larger than that of the temperature-sensitive resistor 6 alone. Conversion is easy.

In the embodiment shown in FIG. 3, the resistor 2 is constituted by a single resistor element 3 formed in a coil shape, and the resistor 2 is inserted and assembled into a temperature-sensitive resistor 6 formed in a cylindrical shape. An example is shown, and a case body 10 and an insulating molding material 11 are shown.
Is not shown.

In the embodiment shown in FIG. 3, similarly to the embodiment shown in FIGS. 1 and 2, the structure of the resistor 2 can be simplified, and the contact set of the temperature-sensitive resistor 6 to the resistance element 3 can be improved. Although it is possible to easily obtain the size of the resistor 1 and easily achieve the miniaturization of the resistor 1, if the resistance element 2 is simply inserted into the temperature-sensitive resistor 6, a fixed positional relationship between the two can be obtained. Since it becomes unstable, at the time of assembling and handling, some means for temporarily fixing the assembled state of the resistance element 3 and the temperature-sensitive resistor 6 such as filling the temperature-sensitive resistor 6 with the insulating molding material 11 is used. It is desirable to take.

In the embodiment shown in FIG. 4, the resistor 2 is constructed by winding a linear resistance element 3 around a cylindrical insulating base 4 in a coil shape and forming the same into a round bar shape or a cylindrical shape. This shows a configuration example in which the temperature resistor 6 is inserted and assembled into the insulating base 4, and the case body 10 and the insulating molding material 11 are not shown.

The embodiment shown in FIG.
However, since the resistance element 3 is opposed to the resistance element 3 via the insulating base 4 of the resistance element 2, the temperature-sensitive resistance element 6 cannot be assembled in contact with the resistance element 3. Body 6
1 and 3 is slightly inferior to the embodiment shown in FIGS. 1 and 3, but since both the resistor 2 and the temperature-sensitive resistor 6 are stable finished products, handling during assembly is safe and easy. Becomes

In the embodiment shown in FIG. 5, the resistor 2 is constituted by winding a linear resistor element 3 in a coil shape on a round rod-shaped or cylindrical insulating base 4 and coiling the same. This shows an example of a configuration in which the case body 10 and the insulating molding material 11 are inserted and assembled in a temperature-sensitive resistor 6 formed in a shape, and is not shown.

In the embodiment shown in FIG. 5, the resistor 3 having the resistance element 3 covered on the hard insulating base 4 is assembled into the hard temperature-sensitive resistor 6 in an inserted manner. Although it is necessary to form the resistor 2 and the temperature-sensitive resistor 6 with a certain degree of dimensional accuracy in order to prevent damage to the temperature sensor, as in the embodiment shown in FIGS. The resistor 6 can be assembled in contact with the resistance element 3 and, as in the embodiment shown in FIG. 4, handling during assembly is easy.

In the embodiment shown in FIG. 6, the resistor 2 is formed by mounting a strip-shaped resistor 3 on the surface of a flat insulating substrate 4 so that the resistor 3 of the resistor 2 is mounted. This shows a configuration example in which a temperature-sensitive resistor 6 formed in a flat plate shape is stacked and assembled on the mounted surface, and a case body 10 and an insulating molding material 11 are not shown.

In the embodiment shown in FIG. 6, since the combination of the resistor 2 and the temperature-sensitive resistor 6 is merely an overlap of the two, the insulating mold material 11 is heated and solidified, Until the mutual positional relationship between the assembly and the temperature-sensitive resistor 6 is fixedly held, it is necessary to temporarily fix the assembly posture between the two by appropriate means. The resistance element 3 can be assembled in contact with the resistance element 3, and there is no dimensional restriction between the resistance element 2 and the temperature-sensitive resistance element 6 to be combined, and the handling of both at the time of assembly is simple. .

As the insulating molding material 11, a silicon cement kneaded with an organic solvent such as xylol or isopropylene as a solvent is used. At the time of heating and after the heating and solidification, the organic solvent is sufficiently removed by volatilization. hand,
The insulating molding material 11 prevents the electrical insulation from being reduced due to carbonization due to the heat generated by the resistor 2.

7 to 9 show different examples of the structure of the temperature-sensitive resistor 6. FIG. 7 shows a round bar, FIG. 8 shows a cylinder, and FIG. 9 shows a flat plate. Is shown.

As shown in FIG. 7B, the round bar-shaped temperature sensitive resistor 6 shown in FIG. 7A is formed on the surface of the insulating base body 8 formed into a sheet by paste-like alumina powder. Similarly, the temperature-sensitive element 7 is formed from a mixture of paste-like high melting point metal powders such as tungsten and molybdenum by drawing a predetermined pattern, and the sheet-shaped insulating base 8 and the temperature-sensitive element 7 are formed. After being wound in the winding direction and formed into a round bar shape, it is sintered at a high temperature of about 1600 ° C., and a lead wire 9 is attached to this sintered product to be formed.

The cylindrical temperature-sensitive resistor 6 shown in FIG. 8A is formed in the same manner as the round bar-shaped temperature-sensitive resistor 6, but as shown in FIG. The only difference is that a sheet-like insulating base body 8 in which a temperature-sensitive element 7 is drawn and formed into a cylindrical shape is wound into a cylindrical shape.

As shown in FIG. 9B, the plate-shaped temperature-sensitive resistor 6 shown in FIG. 9A is formed in a thin plate shape, and the temperature-sensitive element 7 is drawn and formed on one surface. On the surface of the insulating base body 8 on which the temperature-sensitive element 7 is drawn, the other insulating base body 8 also formed in a thin plate shape is laminated, formed into a flat plate shape, sintered, and formed by attaching a lead wire 9. .

The temperature-sensitive resistor 6 shown in FIGS.
As is clear from the description, the temperature-sensitive resistor 6 used in the present invention has the same configuration as a ceramic heater (for example, manufactured by Kyocera Corporation) conventionally used as a "heating element".

FIG. 10 shows an example of a circuit configuration in which the resistor 1 of the present invention is used in a starting protection circuit for DC power. A resistor is connected in series with a main switch 13 between a DC power supply 12 and a load 17. 1 and a relay switch 14 connected in parallel with the resistor 1, and a voltage detector 16 for operating the relay switch 14 is connected in parallel to a capacitor 15 connected between both terminals of a load 17. An alarm signal processing unit 18 for inputting and monitoring an alarm signal indicating a change in the resistance value of the temperature-sensitive resistor 6 is provided.

When the main switch 13 is turned on, the current limited by the resistor 2 of the resistor 1 is supplied to the load 17, and at the same time, the voltage of the capacitor 15 sharply increases, and the load is reduced in a state where the input current is small. The input voltage of the power supply 17 is increased to a desired value to prevent a large amount of electric power from being rapidly input to the load 17.

When the voltage of the capacitor 15 reaches a preset value, the voltage detector 16 detects this and operates to switch the relay switch 14 from OFF to ON. Therefore, the rated current not limited by the DC power supply 12 is supplied to the load 17 through the relay switch 14, and the load 1
The full-scale operation of 7 begins.

At the time of the start, a large current flows through the resistor 2 simultaneously with the turning on of the main switch 13 and the heating temperature of the resistor 3 rises rapidly. The rising degree becomes gentle, and when the relay switch 14 is turned on, the heat generation temperature of the resistance element 3 decreases, and the protection operation at the time of starting the load 17 ends.

In this starting protection circuit, the voltage detector 1
6, failure of the relay switch 14, failure of the capacitor 15, failure of the load 17, etc.
If the current continues to flow through the resistor 2, the temperature of the heat generated by the resistor 3 continues to rise. When the temperature reaches a preset value, the temperature-sensitive resistor 6 monitoring the temperature of the resistor 3 is monitored. The alarm signal from the main switch 1 exceeds the threshold value set in advance.
3 is turned off and an alarm is issued, thereby preventing the occurrence of an accident due to overheating of the resistor 1 and at the same time, notifying that an electrical failure has occurred.

The threshold value preset in the alarm signal processing unit 18 can be freely set within a wide temperature range of 80 ° C. to 800 ° C. as required, whereby the capacity of the power type resistor 1 can be set. And the power type resistor 1
Can be used economically.

[0052]

Since the present invention has the above-described structure, the following effects can be obtained. Operate the power-type resistor sufficiently and safely because the temperature of the resistance element, which is the heat source of the resistor, can be detected safely and accurately up to a high temperature range close to the heat-resistant temperature of the power-type resistor. Can be
As a result, the power type resistor can be used effectively and economically.

The temperature-sensitive resistor is the same sintered molded product as the ceramic and is embedded and fixed by the insulating mold material solidified in the case body, so that it exhibits sufficiently large mechanical strength and high impact resistance. Thus, even in a use environment where an external impact such as severe vibration is applied, it can be used safely and suitably.

The temperature-sensitive resistor has a high thermal shock resistance since it is the same sintered molded product as ceramics, so that the temperature-sensitive resistor can be assembled in contact with or close to the resistor. The heat generation temperature can be detected promptly and directly, so that the heat generation temperature of the resistor can be detected accurately with almost no time delay.

Since the temperature-sensitive resistor can be assembled in contact with or close to the resistor which is the main part of the power type resistor, the size of the combination of the resistor and the temperature-sensitive resistor can be sufficiently increased. This makes it possible to reduce the size of the power-type resistor, thereby easily reducing the size of the power-type resistor without deteriorating the performance.

According to the second aspect of the present invention, the resistance element constituting the resistor can be mounted on the temperature-sensitive resistor in a contact state by using the temperature-sensitive resistor as a core. ,
The temperature-sensitive resistor with respect to the resistance element, which is a heat source, can be brought into contact with the resistor without difficulty, so that the assembly of the resistor and the temperature-sensitive resistor can be easily and stably achieved. A quick and accurate detection operation can be obtained, and the power-type resistor can be sufficiently miniaturized.

According to the third aspect of the invention, the resistance element constituting the resistor can be inserted and mounted on the temperature-sensitive resistor in a contact state. The temperature resistor can be easily contacted,
As a result, a quick and accurate operation for detecting the heat generation temperature of the resistance element can be obtained, and the power type resistor can be sufficiently miniaturized.

In the invention according to claims 4 and 5,
Since the resistor and the temperature-sensitive resistor are inserted and assembled in a state where they are in contact with each other, the mutual relationship between the assembled resistor and the temperature-sensitive resistor is stabilized and self-maintained. Handling is safe and simple.

According to the sixth aspect of the present invention, since the mutual assembling is achieved by merely overlapping the resistor and the temperature-sensitive resistor, the combined dimensions of the resistor and the temperature-sensitive resistor are reduced. And the thickness of the combination of the resistor and the temperature-sensitive resistor can be made sufficiently small, so that the manufacture of the resistor and the temperature-sensitive resistor becomes easy and the thickness is small. A power type resistor can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall bottom view of a power type resistor according to a first embodiment of the present invention, in which an insulating molding material is not shown.

FIG. 2 is a vertical sectional view taken along the line AA in FIG. 1;

FIG. 3 is a view showing a combination of a resistor and a temperature-sensitive resistor according to a second embodiment of the present invention.

FIG. 4 is a view showing a combination of a resistor and a temperature-sensitive resistor according to a third embodiment of the present invention.

FIG. 5 is a view showing a combination of a resistor and a temperature-sensitive resistor according to a fourth embodiment of the present invention.

FIG. 6 is a view showing a combination of a resistor and a temperature-sensitive resistor according to a fifth embodiment of the present invention.

FIG. 7 shows a first structure example of a temperature-sensitive resistor.
(A) is a perspective view of the entire appearance, and (b) is an explanatory view of its manufacture.

FIG. 8 shows a second structure example of the temperature-sensitive resistor.
(A) is a perspective view of the entire appearance, and (b) is an explanatory view of its manufacture.

FIG. 9 shows a third example of the structure of a temperature-sensitive resistor.
(A) is a perspective view of the entire appearance, and (b) is an explanatory view of its manufacture.

FIG. 10 is an electric circuit diagram showing an example of a start control circuit using the power type resistor of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1; Resistor 2; Resistor 3; Resistor 4; Insulating base 5; Terminal wire 6; Temperature-sensitive resistor 7; Temperature-sensitive element 8; Insulating base 9; Lead wire 10; DC power supply 13; main switch 14; relay switch 15; capacitor 16; voltage detector 17; load 18;

Claims (6)

[Claims] 1. A resistor (2) mainly composed of a resistance element (3) made of a resistance material made of an alloy of nickel and chromium or copper and nickel, and an insulating base made of an electrically insulating material such as alumina powder. The body (8) is made of a mixture of a metal powder having a high melting point, such as tungsten or molybdenum, together with the insulating base body (8), and has a high heat resistance of about 1000 ° C. and at least 80 ° C. to 800 ° C. A temperature-sensitive element (7) having a relatively high temperature coefficient of resistance in a temperature range of
(7) is covered with an insulating base body (8), and the temperature-sensitive resistor (6), which is integrally sintered and formed, is brought into contact with or close to each other, and the insulating molding material is placed in the case body (10). A power type resistor buried and fixed in (11). 2. A coil-shaped resistor element (3) composed of a resistance element (3) wound around a rod-shaped or cylindrical-shaped temperature-sensitive resistor element (6) for external assembly. The power type resistor according to claim 1. 3. A temperature-sensitive resistor (6) formed into a cylindrical shape by using a resistor (2) constituted by a resistor element (3) formed in a coil shape.
The power-type resistor according to claim 1, wherein the power-type resistor is internally assembled. 4. A resistor (2) formed by winding a resistance element (3) around a cylindrical insulating base (4) made of an electrically insulating material to form a resistor (2). The power type resistor according to claim 1, wherein a temperature-sensitive resistor (6) formed in a cylindrical shape is inserted and assembled. 5. A resistor (2) formed by winding a resistive element (3) around a rod-shaped insulating substrate (4) made of an electrically insulating material to form a resistor (2), and forming the resistor (2) into a cylindrical shape. 2. A power type resistor according to claim 1, wherein said power type resistor is inserted and assembled in said temperature-sensitive resistor. 6. An insulating substrate (4) made of a flat insulating material.
A resistor (2) is formed by mounting and fixing a resistance element (3) on the substrate, and a temperature-sensitive resistor (6) formed in a flat plate shape is mounted on the resistor (2) in a stacked manner. 2. The power type resistor according to 1.