CN203216633U - Temperature detection module for frequency converter - Google Patents
Temperature detection module for frequency converter Download PDFInfo
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- CN203216633U CN203216633U CN 201320214201 CN201320214201U CN203216633U CN 203216633 U CN203216633 U CN 203216633U CN 201320214201 CN201320214201 CN 201320214201 CN 201320214201 U CN201320214201 U CN 201320214201U CN 203216633 U CN203216633 U CN 203216633U
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Abstract
The utility model discloses a temperature detection module for a frequency converter. The utility model aims to provide a temperature detection module for a frequency converter. The temperature detection module comprises a differential amplification circuit and a power supply circuit and is characterized in that one end of the differential amplification circuit is respectively connected with a temperature acquisition circuit and an adjustable constant current source circuit, the other end of the differential amplification circuit is connected with a frequency converter control board through a signal conditioning circuit, the temperature acquisition circuit is connected with a power supply circuit through the adjustable constant current source circuit, and the power supply circuit is connected with the differential amplification circuit and the signal conditioning circuit respectively. The temperature detection module is mainly used for the temperature detection of the frequency converter.
Description
Technical field
The utility model relates to a kind of temperature detecting module, relates in particular to a kind of variable-frequence governor temperature detecting module.
Background technology
Power semiconductor device in the variable-frequence governor can produce power attenuation inevitably in operate as normal, cause the accumulation of heat of variable-frequence governor inside, and the temperature of variable-frequence governor is constantly risen.Power semiconductor device in the variable-frequence governor itself is again that the job stability of the too high device of temperature descends rapidly to the highstrung element of temperature, and too high temperature also can cause adverse influence to other circuit in the variable-frequence governor simultaneously.So variable-frequence governor itself must detect himself temperature constantly, then temperature signal is delivered to the variable-frequence governor control panel, judge whether to quit work or drop into extra cooling device by program.
General temperature sensing circuit exists output signal and variable-frequence governor control panel signal does not match, stability and precision is not high, circuit is complicated, be subject to disturb, problem such as recoverable not, not too is suitable as the temperature detection of variable-frequence governor.
Summary of the invention
The object of the present invention is to provide a kind of variable-frequence governor to detect problem in real time with the temperature that temperature detecting module solves variable-frequence governor.
For achieving the above object, technical solution of the present invention is: a kind of variable-frequence governor temperature detecting module, comprise differential amplifier circuit and power circuit, it is characterized in that: an end of described differential amplifier circuit links to each other with temperature collection circuit and adjustable constant-flow source circuit respectively, the other end links to each other with the variable-frequence governor control panel by signal conditioning circuit, temperature collection circuit links to each other with power circuit by the adjustable constant-flow source circuit, and power circuit also links to each other with differential amplifier circuit and signal conditioning circuit respectively.
The beneficial effects of the utility model are: by the redesign to thermal module, not only realized variable-frequence governor temperature sensing circuit simplification, temperature output signal and variable-frequence governor control panel signal coupling, improved stability and precision, also realized the temperature correction function.
Description of drawings
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is electrical schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model and embodiment thereof are described in further detail.
Referring to Fig. 1-2, the utility model comprises differential amplifier circuit and power circuit, it is characterized in that: an end of described differential amplifier circuit links to each other with temperature collection circuit and adjustable constant-flow source circuit respectively, the other end links to each other with the variable-frequence governor control panel by signal conditioning circuit, temperature collection circuit links to each other with power circuit by the adjustable constant-flow source circuit, and power circuit also links to each other with differential amplifier circuit and signal conditioning circuit respectively.
Resistance R 1, R2, R3, R5, thermistor RT1 and capacitor C 1 constitute temperature collection circuit.One end of thermistor links to each other with the output terminal of adjustable constant-flow source circuit, links to each other with the in-phase end of differential amplifier circuit by R3, R5 simultaneously, and the other end links to each other with the inverting input of differential amplifier circuit by R1, R2.
Thermistor RT1 is the key element of temperature collection circuit, when the temperature change of variable-frequence governor, corresponding linear change of the resistance of thermistor, the steady current of exporting by constant current source in the linear resistance that changes, between resistance R 1 and R3, produce the servo-actuated linear voltage corresponding with the resistance linear change, thereby realized temperature signal is converted to the function of voltage signal.Anti-phase and the in-phase input end of delivering to differential amplifier circuit of this voltage signal after by resistance R 1, R2 and R3, R5 handled again.Capacitor C 1 plays the decoupling effect, by its filtering be coupled to interference on the voltage signal.
Constant current source module U1 and potentiometer RP1 constitute the adjustable constant-flow source circuit of temperature detecting module, wherein, the output terminal of U1 links to each other with the end of thermistor RT1, links to each other with the in-phase input end of differential amplifier circuit with R5 by R3 simultaneously, and the reference current adjustment end of U1 links to each other with potentiometer RP1.
The invariable current signal of constant-current source circuit output offers thermistor makes it produce temperature variant servo-actuated voltage.When the temperature that detects when temperature detecting module has deviation with actual temperature, by adjusting potentiometer RP1 and then adjusting the current value that constant current source exports and come the compensation temperature deviation, realized degree of accuracy and the error correcting function of temperature detection.
U2 is operational amplifier, form calculus of differences amplifying circuit (differential amplifier circuit) with resistance R 1-R6, capacitor C 2, the in-phase end of operational amplifier links to each other with temperature collection circuit with end of oppisite phase, and the output terminal of calculus of differences amplifying circuit links to each other with signal conditioning circuit.
The calculus of differences amplifying circuit becomes the voltage signal that the controller in the variable-frequence governor control panel allows with the servo-actuated differential voltage signal of temperature collection circuit collection through certain amplification and gives signal conditioning circuit.Simultaneously because the isolation features of calculus of differences amplifying circuit itself, input/output signal is isolated again, prevent crosstalking mutually of input and output level, pass through the filtering of capacitor C 2 and C3 in addition, the antijamming capability of calculus of differences amplifying circuit further strengthens, and avoided because amplifier causes the fluctuation of output when being interfered.
Resistance R 7, diode D1, ZD1 and capacitor C 4 have constituted signal conditioning circuit.The input end of signal conditioning circuit links to each other with the output terminal of differential amplifier circuit, and input end partly links to each other with the processes temperature signal of variable-frequence governor control panel.
Resistance R 7 and diode ZD1 are series at the feed circuit two ends, capacitor C 4 and D1 and in the ZD1 two ends, produced a stable clamp voltage at the two ends of ZD1, this magnitude of voltage is not more than the applied signal voltage that the variable-frequence governor control panel allows, play the clamper function to temperature signal, prevented the too high damage variable-frequence governor of temperature signal amplitude control panel.By this signal conditioning circuit, realized the problem of temperature detecting module output with the control panel Signal Matching.
Power circuit provides power supply for each circuit unit of temperature detecting module, links to each other with the constant flow module of adjustable constant-flow source circuit, the operational amplifier of difference input operational amplification circuit and resistance, diode and the electric capacity of signal conditioning circuit respectively.
Claims (1)
1. variable-frequence governor temperature detecting module, comprise differential amplifier circuit and power circuit, it is characterized in that: an end of described differential amplifier circuit links to each other with temperature collection circuit and adjustable constant-flow source circuit respectively, the other end links to each other with the variable-frequence governor control panel by signal conditioning circuit, temperature collection circuit links to each other with power circuit by the adjustable constant-flow source circuit, and power circuit also links to each other with differential amplifier circuit and signal conditioning circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320214201 CN203216633U (en) | 2013-04-25 | 2013-04-25 | Temperature detection module for frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320214201 CN203216633U (en) | 2013-04-25 | 2013-04-25 | Temperature detection module for frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203216633U true CN203216633U (en) | 2013-09-25 |
Family
ID=49206160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320214201 Expired - Lifetime CN203216633U (en) | 2013-04-25 | 2013-04-25 | Temperature detection module for frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203216633U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245432A (en) * | 2013-04-25 | 2013-08-14 | 湘煤立达矿山装备股份有限公司 | Temperature detection module for variable-frequency governor |
-
2013
- 2013-04-25 CN CN 201320214201 patent/CN203216633U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245432A (en) * | 2013-04-25 | 2013-08-14 | 湘煤立达矿山装备股份有限公司 | Temperature detection module for variable-frequency governor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |