CN204783773U - Diesel locomotive's brake resistance high temperature protection device - Google Patents
Diesel locomotive's brake resistance high temperature protection device Download PDFInfo
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- CN204783773U CN204783773U CN201520493883.4U CN201520493883U CN204783773U CN 204783773 U CN204783773 U CN 204783773U CN 201520493883 U CN201520493883 U CN 201520493883U CN 204783773 U CN204783773 U CN 204783773U
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- braking resistor
- high temperature
- protection device
- resistance
- temperature protection
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Abstract
The utility model belongs to a diesel locomotive's brake resistance high temperature protection device, characterized by: it includes one the bridge that comprises four resistance (2) at least, and wherein a bridge arm resistance of bridge (2) is brake resistance, the output voltage U2 of bridge (2) provide according to the following formula: U2=R0 (R2+R3) (U1 (R0+R1) (R0+R1+R2+R3) R2 (R0+R1) (U1 (R2+R3) (R0+R1+R2+R3), in the formula, R0 is brake resistance. This kind of diesel locomotive's brake resistance high temperature protection device ability direct reaction brake resistance temperature has the reliability height, and temperature response is fast.
Description
Technical field
The utility model belongs to a kind of braking resistor high temperature protection device of internal combustion locomotive, is particularly useful for the braking resistor that resistance temperature coefficient is large.
Background technique
The protection of current braking resistor has two kinds of modes, and one is the protection of going wrong of blower fan, every platform locomotive braking resistor, and two is differential protections of rotation speed of fan, every platform locomotive two braking resistors.Two kinds of protections are all the motor speeds being detected braking resistor by speed probe, then carry out differential protection or protection of going wrong by microcomputer system.The mode of carrying out protective resistance above by speed probe detection braking resistor motor speed is all indirect thermometric, and one is there is error, and two is that the reaction time is slow.
Summary of the invention
The purpose of this utility model is to provide one can directly react braking resistor temperature, has reliability high, the braking resistor high temperature protection device of the internal combustion locomotive that temperature response is fast.
The technical solution of the utility model is to provide a kind of braking resistor high temperature protection device of internal combustion locomotive, it is characterized in that: at least comprise a bridge road be made up of four resistance, and an arm resistance on its jackshaft road is braking resistor.
Described bridge road output voltage U2 provides according to following formula:
U2=R0 (R2+R3) (U1/ (R0+R1))/(R0+R1+R2+R3)-R2 (R0+R1) (U1/ (R2+R3))/(R0+R1+R2+R3), in formula, R0 is braking resistor.
Described bridge road exports and is electrically connected with measuring amplifier.
Described R0 is braking resistor one section of resistance.
Described braking resistor is connected to bridge road by copper bar.
The utility model has the advantages that: braking resistor is applied on bridge circuit, to realize high temperature protection.
The utility model gets one section of resistance R0 on braking resistor band, and used extraction copper bar to cause outside, bridge circuit is formed with R1, R2, R3 in resistor box outside, when resistance device normally works, the magnitude of voltage that U2 exports is a value range, can provide, when resistance device temperature is greater than design work temperature according to calculating formula, the resistance of resistance R0 also becomes large, and at this moment output voltage values U2 also increases.
Under definition normal temperature, output voltage values is safety value, and when resistive band temperature exceedes design maximum temperature, its output voltage values reaches Locomotive Microcomputer Control System as alarm signal, and Locomotive Microcomputer Control System takes protective measure.
Below in conjunction with embodiment's accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment electrical schematic diagram;
Fig. 2 is the utility model embodiment electric circuit inspection schematic diagram.
In figure, 1, [constant; 2, Qiao Lu; 3, measuring amplifier; 4, copper bar; 5, controller.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of braking resistor high temperature protection device of internal combustion locomotive, is characterized in that: at least comprise a bridge road 2 be made up of four resistance, and an arm resistance on its jackshaft road 2 is braking resistor R0.
Described bridge road 2 output voltage U2 provides according to following formula:
U2=R0 (R2+R3) (U1/ (R0+R1))/(R0+R1+R2+R3)-R2 (R0+R1) (U1/ (R2+R3))/(R0+R1+R2+R3), in formula, R0 is braking resistor.Described R0 is braking resistor one section of resistance.Braking resistor is connected to bridge road 2 by copper bar 4.
Embodiment 2
As shown in Figure 2, a kind of braking resistor high temperature protection device of internal combustion locomotive, at least comprises a bridge road 2 be made up of four resistance, and an arm resistance on its jackshaft road 2 is braking resistors; Described R0 is braking resistor one section of resistance; Braking resistor is connected to bridge road by copper bar 4, and the power end on bridge road 2 is electrically connected with [constant 1; The output terminal on bridge road 2 is electrically connected with the input end of measuring amplifier 3, and the output terminal of measuring amplifier 3 is electrically connected with the control input end of controller 5, and the input terminal voltage U2 of measuring amplifier 3 provides according to following formula:
U2=R0 (R2+R3) (U1/ (R0+R1))/(R0+R1+R2+R3)-R2 (R0+R1) (U1/ (R2+R3))/(R0+R1+R2+R3), in formula, R0 is braking resistor.
The utility model gets one section of resistance R0 on braking resistor band, and used extraction copper bar 4 to cause outside, bridge circuit is formed with R1, R2, R3 in resistor box outside, when resistance device normally works, the magnitude of voltage that U2 exports is a value range, can provide, when resistance device temperature is greater than design work temperature according to calculating formula, the resistance of resistance R0 also becomes large, and at this moment output voltage values U2 also increases.
Claims (6)
1. a braking resistor high temperature protection device for internal combustion locomotive, is characterized in that: at least comprise a bridge road (2) be made up of four resistance, an arm resistance on its jackshaft road (2) is braking resistor.
2. the braking resistor high temperature protection device of a kind of internal combustion locomotive according to claim 1, is characterized in that: the output voltage U2 on described bridge road (2) provides according to following formula:
U2=R0 (R2+R3) (U1/ (R0+R1))/(R0+R1+R2+R3)-R2 (R0+R1) (U1/ (R2+R3))/(R0+R1+R2+R3), in formula, R0 is braking resistor.
3. the braking resistor high temperature protection device of a kind of internal combustion locomotive according to claim 1, is characterized in that: described bridge road (2) exports and is electrically connected with measuring amplifier (3).
4. the braking resistor high temperature protection device of a kind of internal combustion locomotive according to claim 2, is characterized in that: described R0 is braking resistor one section of resistance.
5. the braking resistor high temperature protection device of a kind of internal combustion locomotive according to claim 2, is characterized in that: described braking resistor is connected to bridge road (2) by copper bar (4).
6. the braking resistor high temperature protection device of a kind of internal combustion locomotive according to claim 2, is characterized in that: the power end on described bridge road (2) is electrically connected with [constant (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520493883.4U CN204783773U (en) | 2015-07-08 | 2015-07-08 | Diesel locomotive's brake resistance high temperature protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520493883.4U CN204783773U (en) | 2015-07-08 | 2015-07-08 | Diesel locomotive's brake resistance high temperature protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204783773U true CN204783773U (en) | 2015-11-18 |
Family
ID=54523829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520493883.4U Active CN204783773U (en) | 2015-07-08 | 2015-07-08 | Diesel locomotive's brake resistance high temperature protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204783773U (en) |
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2015
- 2015-07-08 CN CN201520493883.4U patent/CN204783773U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |