CN202840483U - Motor temperature anomaly protection circuit for air compressor system - Google Patents
Motor temperature anomaly protection circuit for air compressor system Download PDFInfo
- Publication number
- CN202840483U CN202840483U CN 201120483979 CN201120483979U CN202840483U CN 202840483 U CN202840483 U CN 202840483U CN 201120483979 CN201120483979 CN 201120483979 CN 201120483979 U CN201120483979 U CN 201120483979U CN 202840483 U CN202840483 U CN 202840483U
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- China
- Prior art keywords
- resistance
- amplifier
- phase input
- power supply
- voltage stabilizing
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Abstract
The utility model discloses a motor temperature anomaly protection circuit for an air compressor system. The circuit adopts two Schmidt comparison circuits composed of a two-way operational amplifier formed by two amplifiers and a corresponding resistor-capacitor component, wherein positive phase input ends of the two amplifiers are provided with clamping voltage stabilizing diodes respectively so as to set certain voltage at the positive phase input ends of the two amplifiers. A thermistor is connected to an input end of the circuit, and the clamping voltage at the positive phase input ends of the two amplifiers is changed according to variations in resistance of the thermistor. Output ends of the two amplifiers are enabled to overturn correspondingly, and overturn signals of the two amplifiers are inputted into a control component of the air compressor system so as to carry out corresponding control on a motor. The circuit disclosed by the utility model overcomes the defects of a traditional control method of motor temperature anomaly protection, avoids misjudgment on the temperature of a motor winding, improves the reliability in judging the temperature of the motor winding, and ensures the normal running of the air compressor system.
Description
Technical field
The utility model relates to a kind of air compressor system motor temperature abnormity protection circuit.
Background technology
The air compressor system motor is the main core component of system, operation and contingent fault along with system, the temperature of motor winding inside rises, when temperature during greater than the limiting value of motor winding, may cause the damage of motor, affect the normal operation of air compressor system, cause certain economic loss; Be generally the temperature rise of Real-Time Monitoring motor winding inside, at the inner thermistor that embeds positive temperature coefficient of motor winding, thermistor detects the motor winding temperature and temperature signal is transferred to control assembly, by the corresponding operating mode of control assembly control motor, to guarantee the safety of motor; The general control parts equal 1K Ω as separation take the thermistor resistance, when resistance during less than 1K Ω, the motor winding temperature is normal condition, when resistance during greater than 1K Ω, show that the motor winding temperature is the condition of high temperature, control assembly carries out the control of motor accordingly, obviously there is larger drawback in this control mode, simultaneously because error and the motor winding of thermistor resistance are subject to surrounding environment influence, affect control assembly to motor winding current state Accuracy of Judgement, high to motor winding temperature False Rate, badly influence the normal operation of air compressor system.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of air compressor system motor temperature abnormity protection circuit; this circuit has overcome the defective of conventional motors temperature anomaly protection control mode; avoided the erroneous judgement to the motor winding temperature; Effective Raise the reliability judged of motor winding temperature, guaranteed the normal operation of air compressor system.
For solving the problems of the technologies described above; the utility model air compressor system motor temperature abnormity protection circuit comprises thermistor and the power supply of being located in the motor winding; also comprise the two-way operational amplifier; the first voltage stabilizing didoe; the second voltage stabilizing didoe; the first resistance; the second resistance; the 3rd resistance; the 4th resistance; the 5th resistance; the 6th resistance; the 7th resistance; the 8th resistance; the 9th resistance; the tenth resistance; the 11 resistance; the 12 resistance; the first electric capacity and the second electric capacity; described power supply provides the operating voltage of described two-way operational amplifier; described two-way operational amplifier comprises the first amplifier and the second amplifier; described thermistor one end connects power positive end by described the first resistance respectively; connect described the first amplifier negative-phase input by described the 5th resistance; by described the tenth resistance connect described the second amplifier negative-phase input and respectively by described the first electric capacity be connected electric capacity and connect described power supply negative terminal; the described thermistor other end connects power supply negative terminal by described the second resistance; described the first voltage stabilizing didoe and the rear anodic bonding power supply negative terminal that is connected described the first amplifier normal phase input end and power supply negative terminal and the first voltage stabilizing didoe of the 4th resistance serial connection; described the 3rd resistance connects described the first voltage stabilizing didoe negative electrode and power positive end; is connected described the second amplifier normal phase input end after described the second voltage stabilizing didoe and the 9th resistance serial connection and is connected the negative electrode connection power supply negative terminal of the second voltage stabilizing didoe with power supply negative terminal; described the 8th resistance connects described the second voltage stabilizing didoe anode and power positive end; described the 3rd electric capacity connects described power positive end and the second amplifier operating voltage negative terminal; described the 7th resistance and the 12 resistance one end connect respectively the output of described the first amplifier and the second amplifier; described the 6th resistance connects described the first amplifier normal phase input end and the 7th resistance other end; described the 11 resistance connects described the second amplifier normal phase input end and the 12 resistance other end, and described the 7th resistance other end and the 12 resistance other end are the output of this circuit.
Because the utility model air compressor system motor temperature abnormity protection circuit has adopted technique scheme; be that this circuit adopts the two-way operational amplifier and the corresponding Resistor-Capacitor Unit that are made of two amplifiers to consist of two Schmidt's comparison circuits; the normal phase input end of two amplifiers is respectively equipped with the clamper voltage stabilizing didoe by resistance; with the normal phase input end with two amplifiers certain voltage is set; thermistor connects the input of this circuit; change in resistance according to thermistor; change the clamp voltage of two amplifier normal phase input ends; make the output of two amplifiers do corresponding upset; and with the control assembly of the energizing signal of two amplifiers input air compressor system, motor is made corresponding control.This circuit has overcome the defective of conventional motors temperature anomaly protection control mode, has avoided the erroneous judgement to the motor winding temperature, Effective Raise the reliability judged of motor winding temperature, guaranteed the normal operation of air compressor system.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the utility model air compressor system motor temperature abnormity protection circuit schematic diagram.
Embodiment
As shown in Figure 1; the utility model air compressor system motor temperature abnormity protection circuit comprises thermistor Rt and the power supply V that is located in the motor winding; also comprise the two-way operational amplifier; the first voltage stabilizing didoe D1; the second voltage stabilizing didoe D2; the first resistance R 1; the second resistance R 2; the 3rd resistance R 3; the 4th resistance R 4; the 5th resistance R 5; the 6th resistance R 6; the 7th resistance R 7; the 8th resistance R 8; the 9th resistance R 9; the tenth resistance R 10; the 11 resistance R 11; the 12 resistance R 12; the first capacitor C 1; the second capacitor C 2 and the 3rd capacitor C 3; described power supply V provides the operating voltage of described two-way operational amplifier; described two-way operational amplifier comprises the first amplifier IC1 and the second amplifier IC2; described thermistor Rt one end connects power supply V anode by described the first resistance R 1 respectively; connect described the first amplifier IC1 negative-phase input by described the 5th resistance R 5; by described the tenth resistance R 10 connect described the second amplifier IC2 negative-phase inputs and respectively by described the first capacitor C 1 be connected the described power supply V negative terminal GND of capacitor C 2 connections; the described thermistor Rt other end connects power supply V negative terminal GND by described the second resistance R 2; described the first voltage stabilizing didoe D1 and the rear anodic bonding power supply V negative terminal GND that is connected described the first amplifier IC1 normal phase input end and power supply V negative terminal GND and the first voltage stabilizing didoe D1 of the 4th resistance R 4 serial connections; described the 3rd resistance R 3 connects described the first voltage stabilizing didoe D1 negative electrode and power supply V anode; is connected described the second amplifier IC2 normal phase input end after described the second voltage stabilizing didoe D2 and the 9th resistance R 9 serial connection and is connected the negative electrode connection power supply V negative terminal GND of the second voltage stabilizing didoe D2 with power supply V negative terminal GND; described the 8th resistance R 8 connects described the second voltage stabilizing didoe D2 anode and power supply V anode; described the 3rd capacitor C 3 connects described power supply V anode and the second amplifier IC2 operating voltage negative terminal; it plays the effect of power filter as decoupling capacitance; described the 7th resistance R 7 and the 12 resistance R 12 1 ends connect respectively the output of described the first amplifier IC1 and the second amplifier IC2; described the 6th resistance R 6 connects described the first amplifier IC1 normal phase input end and the 7th resistance R 7 other ends; described the 11 resistance R 11 connects described the second amplifier IC2 normal phase input end and the 12 resistance R 12 other ends, and described the 7th resistance R 7 other ends and the 12 resistance R 12 other ends are output terminals A 1 and the A2 of this circuit.
The two-way operational amplifier of this circuit adopts the TLC27L2 integrated transporting discharging to consist of two comparison circuits, the normal phase input end of the first amplifier passes through the first voltage stabilizing didoe clamper at 3.9V, the normal phase input end of the second amplifier passes through the second voltage stabilizing didoe clamper at 0.7V, the output end voltage of operational amplifier is incorporated into in-phase input end simultaneously, so that this circuit has the characteristic of Schmitt trigger circuit, Effective Raise the sensitivity of this circuit control.
When the motor winding temperature was normal, the resistance of thermistor was when normal temperature range, and its resistance is 90 Ω
~1.9K Ω, through the voltage of this circuit sampling between 0.7V between the 3.9V, this sampled voltage consists of respectively voltage comparator circuit with the first amplifier and second amplifier of this circuit respectively, characteristic by comparison circuit, the output signal of the first amplifier is high level, and the output signal of the second amplifier is low level.The control assembly of air compressor system is by the operation of normal mode control motor.
When the resistance of thermistor was within the short-circuit alarming scope, its resistance was less than 30 Ω, and less than 0.7V, then the output of two amplifiers is high level through the voltage of this circuit sampling, and the control assembly control motor of air compressor system is stopped transport; Only have the thermistor resistance of working as to surpass 90 Ω, alarm signal just can be cancelled.
When the resistance of thermistor is within the high temperature alarm scope, its resistance is greater than 3.3K Ω, and greater than 3.9V, the output signal of the first amplifier is low level through the voltage of this circuit sampling, the output signal of the second amplifier is low level, and the control assembly control motor of air compressor system is stopped transport; Only have when thermistor resistance during less than 1.9K Ω, alarm signal just can be cancelled.
Two-way operational amplifier in this circuit and Resistor-Capacitor Unit consist of Schmidt's comparison circuit, and it is a kind of threshold switch circuit, have the gate circuit of sudden change I/O characteristic.Sort circuit is designed to the resistance input voltage and minor variations occurs, when namely being lower than a certain threshold value, the output voltage that namely causes comparison circuit changes, and can effectively guarantee detection signal purpose is qualitatively realized in time motor being made corresponding control according to the change in resistance of thermistor.Compare and do not have the thermistor temp of Schmidt's characteristic testing circuit, improved the control assembly of air compressor system in the reliability of judging motor Current Temperatures situation, and antijamming capability is also strengthened greatly, has guaranteed the normal operation of air compressor system motor, has avoided the generation of electrical fault.
Claims (1)
1. air compressor system motor temperature abnormity protection circuit; comprise thermistor and the power supply be located in the motor winding; it is characterized in that: also comprise the two-way operational amplifier; the first voltage stabilizing didoe; the second voltage stabilizing didoe; the first resistance; the second resistance; the 3rd resistance; the 4th resistance; the 5th resistance; the 6th resistance; the 7th resistance; the 8th resistance; the 9th resistance; the tenth resistance; the 11 resistance; the 12 resistance; the first electric capacity and the second electric capacity; described power supply provides the operating voltage of described two-way operational amplifier; described two-way operational amplifier comprises the first amplifier and the second amplifier; described thermistor one end connects power positive end by described the first resistance respectively; connect described the first amplifier negative-phase input by described the 5th resistance; by described the tenth resistance connect described the second amplifier negative-phase input and respectively by described the first electric capacity be connected electric capacity and connect described power supply negative terminal; the described thermistor other end connects power supply negative terminal by described the second resistance; described the first voltage stabilizing didoe and the rear anodic bonding power supply negative terminal that is connected described the first amplifier normal phase input end and power supply negative terminal and the first voltage stabilizing didoe of the 4th resistance serial connection; described the 3rd resistance connects described the first voltage stabilizing didoe negative electrode and power positive end; is connected described the second amplifier normal phase input end after described the second voltage stabilizing didoe and the 9th resistance serial connection and is connected the negative electrode connection power supply negative terminal of the second voltage stabilizing didoe with power supply negative terminal; described the 8th resistance connects described the second voltage stabilizing didoe anode and power positive end; described the 3rd electric capacity connects described power positive end and the second amplifier operating voltage negative terminal; described the 7th resistance and the 12 resistance one end connect respectively the output of described the first amplifier and the second amplifier; described the 6th resistance connects described the first amplifier normal phase input end and the 7th resistance other end; described the 11 resistance connects described the second amplifier normal phase input end and the 12 resistance other end, and described the 7th resistance other end and the 12 resistance other end are the output of this circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120483979 CN202840483U (en) | 2011-11-29 | 2011-11-29 | Motor temperature anomaly protection circuit for air compressor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120483979 CN202840483U (en) | 2011-11-29 | 2011-11-29 | Motor temperature anomaly protection circuit for air compressor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202840483U true CN202840483U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120483979 Expired - Fee Related CN202840483U (en) | 2011-11-29 | 2011-11-29 | Motor temperature anomaly protection circuit for air compressor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202840483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199490A (en) * | 2021-12-13 | 2022-03-18 | 江苏联能电子技术有限公司 | Intelligent vibration detection system and detection method based on wireless transmission |
| CN114305404A (en) * | 2021-12-28 | 2022-04-12 | 乐普（北京）医疗器械股份有限公司 | Radiant heat collecting and amplifying circuit and application thereof |
-
2011
- 2011-11-29 CN CN 201120483979 patent/CN202840483U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199490A (en) * | 2021-12-13 | 2022-03-18 | 江苏联能电子技术有限公司 | Intelligent vibration detection system and detection method based on wireless transmission |
| CN114305404A (en) * | 2021-12-28 | 2022-04-12 | 乐普（北京）医疗器械股份有限公司 | Radiant heat collecting and amplifying circuit and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20191129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |