CN103576017B - Cable low-temperature test control circuit - Google Patents
Cable low-temperature test control circuit Download PDFInfo
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- CN103576017B CN103576017B CN201210274397.4A CN201210274397A CN103576017B CN 103576017 B CN103576017 B CN 103576017B CN 201210274397 A CN201210274397 A CN 201210274397A CN 103576017 B CN103576017 B CN 103576017B
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Abstract
A kind of cable low-temperature test control circuit, including heating module, temperature detecting module and the AC-DC conversion module powered for heating module with temperature detecting module.Temperature detecting module detection motor temperature and output control signal, the temperature that motor is heated to normally starting by control heating module.In above-mentioned cable low-temperature test control circuit, the motor in high-low temperature chamber that can make to be under low temperature environment normally starts, the winding of complete paired cable, so as to the test of complete paired cable.
Description
Technical field
The present invention relates to Motor Control Field, more particularly to it is a kind of make motor in the relatively low high-low temperature chamber of temperature just
The cable low-temperature test control circuit often to work.
Background technology
With the development of society, cable plays more and more important effect in fields such as power Transmission, information transfers.It is logical
Often, the crust of cable is made of plastics or elastomeric material, at low temperature, easy cracking, the problems such as being hardened, be frangible,
Especially when being wound or bending to cable, the damage to cable is more easily caused, therefore, in selection cable sheath material
When, it is necessary to cable carry out Low-Temperature Reliability test.The method of testing in laboratory is：Cable and winding rod are put into height together
Inside incubator after freezing 4-5 hours, then high/low temperature chamber door is opened, cable is quickly wrapped on winding rod by laboratory technician.
But opening high-low temperature chamber behind the door, twined at room temperature, it is difficult to avoid the heating of cable, cause test data inaccurate.
Also, laboratory technician needs to put on one's gloves to be wound, and malfunction, the temperature of gloves also results in the heating of cable, low temperature
It is easily that hand is numb with cold.In addition, opening high-low temperature chamber under low temperature, hot-air enters inside membership impact high-low temperature chamber, causes high-low temperature chamber
Damage.
In order to solve the above problems, it can select that motor is installed in high-low temperature chamber, be utilized in closed high-low temperature chamber
Motor rotates the winding for realizing cable.But when winding cable, the temperature in high-low temperature chamber is often low up to -40 DEG C to -50
DEG C, motor can not normally start at low temperature.Also, all numbers of cable are wound when motor rotates in high-low temperature chamber to be carried out
Monitoring and control, it is difficult to complete to test.
The content of the invention
Based on this, it is necessary to the problem of can not normally starting in the relatively low high-low temperature chamber of temperature for motor, there is provided one
Kind can make the cable low-temperature test control circuit that motor normally starts in the relatively low high-low temperature chamber of temperature.
A kind of cable low-temperature test control circuit, including：
AC-DC conversion module, the alternating current of input is changed and exports direct current；
Temperature detecting module, including the thermistor, adjustable resistance and comparator of motor are arranged at, the thermistor
One end is connected with the output end of the AC-DC conversion module, another the termination adjustable resistance and comparator of the thermistor
Normal phase input end, the adjustable resistance the other end ground connection；The anti-phase input termination reference voltage of the comparator, output end
Export high level or low level；
Heating module, including for heating the heating resistor, the first relay and third transistor of motor, described first after
One end of the coil of electrical equipment is connected with the output end of the AC-DC conversion module, described in another termination of first relay
The input of third transistor, the output head grounding of the third transistor；The control of the third transistor terminates the ratio
Compared with the output end of device, one end of the normally opened contact of first relay is connected with the output end of the AC-DC conversion module,
One end of another termination heating resistor of the normally opened contact of first relay, another termination of the heating resistor
Ground.
In one of the embodiments, in addition to counting module, the counting module include the first control unit and second
Control unit, first control unit include tongue tube, the 4th relay and the 4th transistor, and the 4th transistor includes
The control terminal of 4th transistor described in input, output end and control on or off；One end of the tongue tube with it is described
The output end of AC-DC conversion module is connected, the control terminal of another termination the 4th transistor of the tongue tube, and described
The input of four transistors terminates one end of the 4th relay coil, the other end and the friendship of the 4th relay coil
The output end of DC conversion modules is connected；The output head grounding of 4th transistor, the normally opened contact of the 4th relay
During closure, the first control unit generation counts enabling signal, and controls the counting module once to be counted；Described
Two control units include the 3rd relay, count contact, alarm actuating contact and buzzer, described counting contact one end and the friendship
The output end of DC conversion modules is connected, described one end for counting another termination in contact the 3rd relay coil, and described the
The other end ground connection of three relay coils, the normally opened contact access motor main circuit of the 3rd relay；The alarm actuating contact
One end be connected with the output end of the AC-DC conversion module, the other end of the alarm actuating contact is connected with the buzzer；
When counting not up to counting preset value, the counting contact closure, the alarm actuating contact disconnects, otherwise, the counting contact
Disconnect, the alarm actuating contact closure.
In one of the embodiments, first control unit also includes the 5th filter capacitor and the second drop-down electricity
Resistance, one end of the 5th filter capacitor are connected to the control terminal of the 4th transistor, the 5th filter capacitor it is another
End ground connection, second pull down resistor are connected in parallel in the both ends of the 5th filter capacitor.
In one of the embodiments, the third transistor and the 4th transistor are field-effect transistor.
In one of the embodiments, the heating module also includes the 4th filter capacitor, the 4th filter capacitor
One end is connected with the control terminal of the third transistor, the other end ground connection of the 4th filter capacitor.
In one of the embodiments, the temperature detecting module also include the first divider resistance, the second divider resistance with
First pull down resistor, one end of second divider resistance are connected with the output end of the AC-DC conversion module, and described second
One end of another termination first divider resistance of divider resistance and the inverting input of the comparator, described first point
The other end ground connection of piezoresistance.
In one of the embodiments, the AC-DC conversion module includes transformer, Qiao Dui, three-terminal voltage-stabilizing pipe, first
Filter capacitor and the second filter capacitor, the three-terminal voltage-stabilizing pipe include input, output end and earth terminal, the transformer
Input input AC electricity, output terminates the input of the bridge heap；It is steady that the cathode output end of the bridge heap connects three end
One end of the input of pressure pipe and the first filter capacitor, cathode output end ground connection；Another termination of first filter capacitor
Ground, the output of the three-terminal voltage-stabilizing pipe terminate one end of second filter capacitor and export direct current, second filtered electrical
The other end ground connection of appearance；The earth terminal ground connection of the three-terminal voltage-stabilizing pipe.
In one of the embodiments, the indicating module includes second transistor, phase inverter and light emitting diode, described
Second transistor includes input, output end and controls the control terminal of second transistor described on or off；It is described luminous
The positive pole of diode connects the output end of the AC-DC conversion module, and negative pole connects the input of the second transistor, and described
The control of two-transistor terminates the output end of the phase inverter, and the input of the phase inverter terminates the output end of the comparator,
The output head grounding of the second transistor.
In one of the embodiments, the indicating module also includes the second relay, the 3rd filter capacitor and current limliting
Resistance, one end of the coil of second relay are connected with the output end of AC-DC conversion module, second relay
The input of another termination second transistor of coil；The first normally opened contact access main electricity of motor of second relay
Road, the negative pole of a termination light emitting diode of the second normally opened contact of second relay, second relay
One end of another termination current-limiting resistance of second normally opened contact, the other end ground connection of the current-limiting resistance；3rd filter
The control terminal of the one termination second transistor of ripple electric capacity, the other end ground connection of the 3rd filter capacitor.
In above-mentioned cable low-temperature test control circuit, motor temperature and low in motor temperature is detected by temperature detecting module
Heating module is opened in control when the first temperature threshold, motor is heated, when motor is heated into second temperature threshold value
Heating module is closed in control, to that can start motor after the completion of the heating of motor, with the winding of complete paired cable.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the cable low-temperature test control circuit of an embodiment.
Embodiment
Can not normally it start in the relatively low high-low temperature chamber of temperature to solve motor, and the week that cable can not be wound
The problem of number is monitored and controlled, there is provided a kind of cable for making motor normally start in the relatively low high-low temperature chamber of temperature is low
Warm test control circuit.
As described in Figure 1, the cable low-temperature test control circuit of an embodiment, including heating module 110, temperature detecting module
120 and AC-DC conversion module 140.
AC-DC conversion module 140, the alternating current of input is changed and exports direct current.With to heating module 110, temperature
Detection module 120 is powered.
Temperature detecting module 120, including for heating the thermistor R5, adjustable resistance R1 and comparator CO of motor.Heat
Quick resistance R5 one end is connected with the output end of AC-DC conversion module 140, thermistor R5 another termination adjustable resistance R1
And comparator CO in-phase input end.Adjustable resistance R1 other end ground connection.Comparator CO anti-phase input termination is with reference to electricity
Pressure, output end output high level or low level.Generally, when motor temperature is less than the first temperature threshold, temperature detecting module
To open heating module 110, heating module 110 starts to heat motor 120 output high level；When motor temperature is higher than the second temperature
When spending threshold value, temperature detecting module 120 exports low level to close heating module 110, and heating module 110 stops adding motor
Heat.Generally, the first temperature threshold is the minimum temperature that motor is capable of normal work, and second temperature threshold value is that motor being capable of normal work
The maximum temperature of work.First temperature threshold and second temperature threshold value are set manually by laboratory technician.
Heating module 110 is used to heat in motor.Heating resistor R7 that heating module 110 includes setting close to motor, the
One relay K1 and third transistor Q3.Third transistor Q3 includes input, output end and control on or off the 3rd
Transistor Q3 control terminal.One end of first relay K1 coil is connected with the output end of AC-DC conversion module 140, and first
Another termination third transistor Q3 of relay K1 coil input, third transistor Q3 output head grounding.3rd is brilliant
Body pipe Q3 control termination comparator CO output end.One end of first relay K1 normally opened contact and AC-DC conversion module
140 output end is connected, the other end sending and receiving thermal resistance R7 of the first relay K1 normally opened contact one end, heating resistor R7's
The other end is grounded.Generally, third transistor Q3 uses field-effect transistor.When temperature detecting module 120 exports high level the
Three transistor Q3 are turned on, third transistor Q3 shut-offs when exporting low level.It is readily appreciated that, third transistor Q3 can also use double
Polar transistor.When carrying out Low-Temperature Reliability test to cable, by the extension of one end of cable and the main shaft or main shaft of motor
Axle is connected, so that during motor rotation, the winding of complete paired cable.Then motor and the cable wound with it are together placed in height
In cryogenic box, start high-low temperature chamber, cable is freezed 4-5 hours in high-low temperature chamber with motor.Due to the temperature of now motor
It is relatively low, it can not normally start, motor can be heated to normally to start the temperature of work by heating module 110.In order to
Make heating module 110 that the temperature in high-low temperature chamber will not be made to increase in motor heating process, the body seal of usual motor
In the seal box with preferable insulation effect, electric machine main shaft is extended to outside seal box, in order to wind cable.
In above-mentioned cable low-temperature test control circuit, detected in real time by the thermistor R5 in temperature detecting module 120
The temperature of motor, when motor temperature is less than the first temperature threshold, thermistor R5 partial pressures are smaller, comparator CO homophase input
The input voltage at end is higher than the reference voltage of inverting input, and heating module 110 is opened in comparator CO output high level controls, right
Motor is heated, and when motor is heated into second temperature threshold value, comparator CO output low level controls close heating module
110, to motor can be started after the completion of the heating of motor, with the winding of complete paired cable.Pass through above-mentioned cable low-temperature test control
Circuit processed, it can make to test in high-low temperature chamber the Low-Temperature Reliability of cable and complete, avoid ambient temperature to test result
Influence, test data is more accurate.
As shown in figure 1, in the particular embodiment, cable low-temperature test control circuit also includes counting module 150.Count
Module 150 has the first control unit 152 and the second control unit 154.
First control unit 152, enabling signal is counted for generating, and counted according to the counting enabling signal.It is logical
Often, motor is often rotated one week, and counting module 150 is once counted, and can know electric machine main shaft by the first control unit 152
All numbers of rotation, and then all numbers of monitoring motor winding cable.
Second control unit 154, for cutting off motor main circuit after counting reaches pre-set count values.It is simultaneously emitted by reporting
It is alert.Pre-set count values can be set by counting module 150, when the counting of counting module 150 reaches pre-set count values, second
The meeting automatic cut-off motor main circuit of control unit 154 simultaneously sends alarm.By the second control unit 154, cable can be controlled to twine
Around all numbers.
In the present embodiment, the first control unit 152 includes tongue tube K5, the 4th relay K4, the 4th transistor Q4, the 5th
Filter capacitor C5 and the second pull down resistor R8.4th transistor Q4 includes input, output end and control on or off
4th transistor Q4 control terminal.Tongue tube K5 one end is connected with the output end of AC-DC conversion module 140, tongue tube K5's
Another termination the 4th transistor Q4 control terminal and the 5th filter capacitor C5 one end, the 5th filter capacitor C5 another termination
Ground, the 5th filter capacitor C5 play a part of to filter and eliminate peak voltage.Generally, tongue tube K5 is arranged at the one of electric machine main shaft
Side, magnet is installed on the main shaft of motor, when electric machine main shaft is turned to close to tongue tube K5 side with moving magnet, tongue tube K5
Conducting, when electric machine main shaft band moving magnet is away from tongue tube K5, tongue tube K5 disconnects.Electric machine main shaft often rotates one week, tongue tube
K5 is often turned on once.Therefore, by monitoring that tongue tube K5 conducting number can know all numbers that cable is wound.4th transistor
One end of Q4 input the 4th relay K4 coils of termination, the other end and the AC-DC conversion module 140 of the 4th relay K4 coils
Output end be connected.4th transistor Q4 output head groundings.4th transistor Q4 is field-effect transistor.Turned in tongue tube K5
When, the 4th transistor Q4 control terminal obtains electric, control conducting the 4th transistor Q4 conductings, the 4th relay K4 coil obtain it is electric,
4th relay K4 normally opened contact closure, the generation of the first control unit 152 counts enabling signal, and is once counted.With
Tongue tube K5 disconnects afterwards, the 4th relay K4 coil losing electricity, and the 4th relay K4 normally opened contact disconnects, and once counts knot
Beam.Second pull down resistor R8 is connected in parallel in the 5th filter capacitor C5 both ends, plays drop-down.
In the present embodiment, the second control unit 152 includes the 3rd relay K3, counts contact (not indicating), alarms and touch
Point (not indicating) and buzzer P.Contact one end is counted with the output end of AC-DC conversion module 140 to be connected, it is another to terminate the
One end of three relay K3 coils, the other end ground connection of the 3rd relay K3 coils.3rd relay K3 normally opened contact access
Motor main circuit.One end of alarm actuating contact is connected with the output end of AC-DC conversion module 140, and the other end is connected with buzzer P.
Pre-set count values can be set by counting module 150, when counting not up to counting preset value, count contact closure, alarm
Contact disconnects.Now, the 3rd relay K3 coils are obtained electric, and the normally opened contact for accessing the 3rd relay K3 of motor main circuit is in
Closure state, motor run well, and counting module 150, which is in, counts SBR, when electric machine main shaft goes to magnet close to dry spring
During pipe K5, tongue tube K5 conductings, the 4th transistor Q4 conductings, the 4th relay K4 coils obtain electric, and the 4th relay K4's is normally opened
Contact closure, counting module 150 are once counted, and subsequent tongue tube K5 disconnects, and the 4th relay K4 normally opened contact disconnects,
Once count and terminate.When all numbers that electric machine main shaft rotates make the count value of counting module 150 reach pre-set count values, count and touch
Point disconnects, the 3rd relay K3 coil losing electricities, and the normally opened contact of the 3rd relay K3 in motor main circuit disconnects, the main electricity of motor
Road is cut off, and motor is stopped.Meanwhile alarm actuating contact closes, buzzer P obtains electric alarm, to notify laboratory technician to complete electricity
The winding of cable.
As described in Figure 1, in the particular embodiment, heating module 110 also includes the 4th filter capacitor C4.4th filtered electrical
The one end for holding C4 is connected with the 3rd control terminal, the 4th filter capacitor C4 other end ground connection.Third transistor Q3 is that field-effect is brilliant
Body pipe.4th filter capacitor C4 plays a part of to filter and eliminate peak voltage.When the temperature of motor is less than the first temperature threshold,
Temperature detecting module 120 exports high level (or low level), and third transistor Q3 control terminal receives the high level, makes the 3rd crystalline substance
Body pipe Q3 is turned on, and the first relay K1 coil obtains electric, the first relay K1 normally opened contact closure, heating resistor R7 obtain it is electric,
Start to heat motor.When motor temperature heats second temperature threshold value, temperature detecting module 120 exports low level, the
Three transistor Q3 control terminal receives the low level, turns off third transistor Q3, the first relay K1 coil losing electricity, and first
Relay K1 normally opened contact disconnects, heating resistor R7 dead electricity, stops heating.
As shown in figure 1, in the particular embodiment, temperature detecting module 120 also include the first divider resistance R2, second point
Piezoresistance R3 and the first pull down resistor R4.Second divider resistance R3 one end is connected with the output end of AC-DC conversion module 140,
Second divider resistance R3 the first divider resistance of another termination R2 one end and comparator CO inverting input, the first partial pressure
Resistance R2 other end ground connection.Thermistor R5 is typically secured on motor, it is believed that thermistor R5 temperature and motor
Temperature realtime uniform.When motor temperature is relatively low, thermistor R5 temperature is relatively low, and resistance value is smaller, when less than the first temperature
During threshold value, the terminal voltage of comparator CO in-phase input end is more than the terminal voltage of inverting input, comparator CO output high level.
Heating module 110 starts to heat to motor, and thermistor R5 resistance value gradually increases, when motor temperature reaches second temperature threshold
During value, the terminal voltage of comparator CO in-phase input end is less than the terminal voltage of inverting input, comparator CO output low levels.Add
Thermal modules 110 stop heating motor.
As shown in figure 1, in the particular embodiment, indicating module 130 includes phase inverter I, the 3rd filter capacitor C3, second
Transistor Q2, the second relay K2, light emitting diode D and current-limiting resistance R6.Second transistor include input, output end and
Control on or off second transistor Q2 control terminal.One end of second relay K2 coil and AC-DC conversion module
140 output end is connected, and the one of the second normally opened contact of another input for terminating second transistor Q2 and the second relay K2
End and light emitting diode D negative pole, second transistor Q2 output head grounding, light emitting diode D positive pole and alternating current-direct current turn
The output end of mold changing block 140 is connected.Another termination current-limiting resistance R6 of second the second normally opened contacts of relay K2 one end, current limliting
Resistance R6 other end ground connection.Second transistor Q2 control terminal connects the 3rd filter capacitor C3 one end and phase inverter I
Output end, the 3rd filter capacitor C3 other end ground connection.Phase inverter I input termination comparator CO output end.Second relay
Device K2 the first normally opened contact access motor main circuit.Indicating module 130 receives the low level that temperature detecting module 120 exports,
Second crystal Q2 pipes turn on, and the second relay K2 coils obtain electric, and the second relay K2 the first normally opened contact is normally opened tactile with second
Point closure, the second relay K2 self-lockings, the second relay K2 the first normally opened contact constant conduction, light emitting diode are persistently sent out
Light, instruction laboratory technician can start motor.Generally, second transistor Q2 uses field-effect transistor.It is readily appreciated that, the second crystal
Pipe Q2 can also use bipolar transistor.
As shown in figure 1, in the particular embodiment, AC-DC conversion module 140 includes transformer T1, bridge heap B1, three ends
Voltage-stabiliser tube Q1, the first filter capacitor C1 and the second filter capacitor C2.Three-terminal voltage-stabilizing pipe Q1 includes input, output end and connect
Ground terminal.Transformer T1 input input AC electricity, output termination bridge heap B1 input.Bridge heap B1 cathode output end connects three
Hold voltage-stabiliser tube Q1 input and the first filter capacitor C1 one end, cathode output end ground connection.First filter capacitor C1's is another
One end is grounded, and three-terminal voltage-stabilizing pipe Q1 the second filter capacitor C2 of output termination one end simultaneously exports direct current.Second filter capacitor
C2 other end ground connection.Three-terminal voltage-stabilizing pipe Q1 earth terminal ground connection.First filter capacitor C1 and the second filter capacitor C2 play filtering
Effect.The alternating current of AC power output is after transformer T1 decompressions, then through bridge heap B1 processing, the first direct current of output, and first
Direct current inputs three-terminal voltage-stabilizing pipe Q1 input, three-terminal voltage-stabilizing pipe Q1 earth terminal after the first filter capacitor C1 filtering
Ground connection, to provide reference voltage, three-terminal voltage-stabilizing pipe Q1 output end output direct current, the direct current of output passes through the second filtered electrical
It is powered after holding C2 filtering for heating module 110, temperature detecting module 120 and indicating module 130.
In specific circuit, motor is by motor main circuit incoming transport power supply, and motor main circuit is by being connected in series
First switch SW1, second switch SW2, the second relay K2 the first normally opened contact and the 3rd relay K3 normally opened contact
Composition.When the rotation week number to electric machine main shaft counts, generally use TCN-P61B counters are counted, the relay
Power input be connected with motor main circuit, the 4th relay K4 is accessed between " 12V " and " INPUT " pin of counter
Normally opened contact, " COM " pin are connected with the DC output end of AC-DC conversion module 140, and " NG " pin meets the 3rd relay K3
Coil, " NO " pin connects buzzer.After counter pre-set count values, " NG " pin is connected, the 3rd relay K3 line
Enclose electric, the 3rd relay K3 normally opened contact closure.First switch SW1 is closed, AC-DC conversion module 140 turns alternating current
Direct current is changed to, to be powered to heating module 110, temperature detecting module 120 and indicating module 130.Motor is placed in height
In cryogenic box, start high-low temperature chamber, when the temperature of motor is less than the first temperature threshold, thermistor R5 resistance is smaller, than
The voltage of in-phase input end compared with device CO is higher than the voltage of inverting input, comparator CO output end output high level, control
Third transistor Q3, the first relay K1 action is turned on, adding thermal resistance R7 starts to heat motor.Meanwhile high level passes through
Low level is converted into after crossing phase inverter I processing, to keep second transistor Q2 to close.
To in motor heating process, thermistor R5 temperature gradually rises, and resistance gradually increases, when the temperature of motor adds
When heat is to second temperature threshold value, the voltage of comparator CO in-phase input end is less than the voltage of inverting input, comparator CO's
Output end exports low level, and third transistor Q3, the first relay K1 dead electricity are closed in control, and adding thermal resistance R7 stops adding motor
Heat.Meanwhile low level is converted into high level after phase inverter I processing, second transistor Q2, the second relay are turned on control
K2 coil obtains electric, and the second relay K2 the first normally opened contact and the second normally opened contact close, and the second normally opened contact makes second
Relay self-locking, the first normally opened contact and the second normally opened contact, which are in, continues closure state.It is real meanwhile light emitting diode D is lighted
The person of testing closes second switch SW2, and motor starts to rotate.When the main shaft of motor, which goes to magnet, to be leaned on through tongue tube K5, tongue tube K5
Conducting, the 4th transistor Q4 conductings, the 4th relay K4 coil obtain electric, the 4th relay K4 normally opened contact closure, counting
Device counts once, and later, with the rotation of motor, magnet disconnects away from tongue tube K5, tongue tube K5, the 4th relay K4 coils
Dead electricity, the 4th relay K4 normally opened contact disconnect, and once count and terminate.When all numbers that electric machine main shaft rotates make the meter of counter
When numerical value reaches pre-set count values, " NG " pin disconnects, the 3rd relay K3 coil losing electricities, the 3rd relay in motor main circuit
Device K3 normally opened contact is disconnected, and motor main circuit is cut off, and motor is stopped.Meanwhile " NO " pin turns on, buzzer P is obtained
Electric alarm, to notify laboratory technician to complete the winding of cable.
Motor is placed in high-low temperature chamber, cable to be wound is connected with electric machine main shaft, passes through above-mentioned cable low-temperature test control
Circuit controlled motor processed rotates at low temperature, so as to be wound to cable, with the test of complete paired cable.Motor is completed to electricity
After the winding of cable, cable low-temperature test control circuit control cut-out motor main circuit, and alarm is sent, notify laboratory technician to test
Into.Whole test process completely dispenses with the chamber door for opening high-low temperature chamber, is tested at low temperature without human hand, meets test need
Ask, improve measuring accuracy and reduce the fatigue strength of laboratory technician, improve testing efficiency.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
- A kind of 1. cable low-temperature test control circuit, it is characterised in that including：AC-DC conversion module, the alternating current of input is changed and exports direct current；Temperature detecting module, including it is arranged at the thermistor, adjustable resistance and comparator of motor, one end of the thermistor It is connected with the output end of the AC-DC conversion module, another the termination adjustable resistance and comparator of the thermistor are just Phase input, the other end ground connection of the adjustable resistance；The anti-phase input termination reference voltage of the comparator, output end output High level or low level；Heating module, including for heating the heating resistor, the first relay and third transistor of motor, first relay One end of coil be connected with the output end of the AC-DC conversion module, another termination the described 3rd of first relay The input of transistor, the output head grounding of the third transistor；The control of the third transistor terminates the comparator Output end, one end of the normally opened contact of first relay is connected with the output end of the AC-DC conversion module, described One end of another termination heating resistor of the normally opened contact of first relay, the other end ground connection of the heating resistor；Also include counting module, the counting module includes the first control unit and the second control unit, and first control is single Member includes tongue tube, the 4th relay and the 4th transistor, and the 4th transistor includes input, output end and control is led Control terminal that is logical or turning off the 4th transistor；One end of the tongue tube and the output end phase of the AC-DC conversion module Even, the control terminal of another termination the 4th transistor of the tongue tube, the input termination described the of the 4th transistor One end of four relay coils, the other end and the output end phase of the AC-DC conversion module of the 4th relay coil Even；The output head grounding of 4th transistor, when the normally opened contact of the 4th relay closes, first control unit Generation counts enabling signal, and controls the counting module once to be counted；Second control unit includes the 3rd relay Device, count contact, alarm actuating contact and buzzer, described counting contact one end and the output end phase of the AC-DC conversion module Even, described one end for counting another termination the 3rd relay coil in contact, another termination of the 3rd relay coil Ground, the normally opened contact access motor main circuit of the 3rd relay；One end of the alarm actuating contact and the AC-DC conversion The output end of module is connected, and the other end of the alarm actuating contact is connected with the buzzer；Preset value is not up to counted when counting When, the counting contact closure, the alarm actuating contact disconnects, and otherwise, the counting contact disconnects, the alarm actuating contact closure.
- 2. cable low-temperature test control circuit according to claim 1, it is characterised in that first control unit is also wrapped The 5th filter capacitor and the second pull down resistor are included, one end of the 5th filter capacitor is connected to the control of the 4th transistor End processed, the other end ground connection of the 5th filter capacitor, second pull down resistor are connected in parallel in the 5th filter capacitor Both ends.
- 3. cable low-temperature test control circuit according to claim 1, it is characterised in that the third transistor and the 4th Transistor is field-effect transistor.
- 4. cable low-temperature test control circuit according to claim 1, it is characterised in that the heating module also includes the Four filter capacitors, one end of the 4th filter capacitor are connected with the control terminal of the third transistor, the 4th filtered electrical The other end ground connection of appearance.
- 5. cable low-temperature test control circuit according to claim 1, it is characterised in that the temperature detecting module is also wrapped Include the first divider resistance, the second divider resistance and the first pull down resistor, one end and the alternating current-direct current of second divider resistance The output end of modular converter is connected, one end of another termination first divider resistance of second divider resistance and described The inverting input of comparator, the other end ground connection of first divider resistance.
- 6. cable low-temperature test control circuit according to claim 1, it is characterised in that the AC-DC conversion module bag Transformer, Qiao Dui, three-terminal voltage-stabilizing pipe, the first filter capacitor and the second filter capacitor are included, the three-terminal voltage-stabilizing pipe includes input End, output end and earth terminal, the input input AC electricity of the transformer, output terminate the input of the bridge heap；Institute The cathode output end for stating bridge heap connects the input of the three-terminal voltage-stabilizing pipe and one end of the first filter capacitor, cathode output end connect Ground；The other end ground connection of first filter capacitor, the output of the three-terminal voltage-stabilizing pipe terminate the one of second filter capacitor Hold and export direct current, the other end ground connection of second filter capacitor；The earth terminal ground connection of the three-terminal voltage-stabilizing pipe.
- 7. control circuit according to claim 1, it is characterised in that also include including indicating module, the indicating module Second transistor, phase inverter and light emitting diode, the second transistor include input, output end and control conducting or closed The control terminal of the disconnected second transistor；The positive pole of the light emitting diode connects the output end of the AC-DC conversion module, bears Pole connects the input of the second transistor, and the control of the second transistor terminates the output end of the phase inverter, described anti- The input of phase device terminates the output end of the comparator, the output head grounding of the second transistor.
- 8. cable low-temperature test control circuit according to claim 7, it is characterised in that the indicating module also includes the Two relays, the 3rd filter capacitor and current-limiting resistance, one end and the AC-DC conversion module of the coil of second relay Output end be connected, the input of another termination second transistor of the coil of second relay；Described second after The first normally opened contact access motor main circuit of electrical equipment, a termination of the second normally opened contact of second relay are described luminous The negative pole of diode, one end of another termination current-limiting resistance of the second normally opened contact of second relay, the limit The other end ground connection of leakage resistance；The control terminal of the one termination second transistor of the 3rd filter capacitor, the 3rd filter The other end ground connection of ripple electric capacity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274397.4A CN103576017B (en) | 2012-08-01 | 2012-08-01 | Cable low-temperature test control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274397.4A CN103576017B (en) | 2012-08-01 | 2012-08-01 | Cable low-temperature test control circuit |
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| CN103576017A CN103576017A (en) | 2014-02-12 |
| CN103576017B true CN103576017B (en) | 2018-02-06 |
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| CN201210274397.4A Active CN103576017B (en) | 2012-08-01 | 2012-08-01 | Cable low-temperature test control circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183035A (en) * | 2015-08-10 | 2015-12-23 | 芜湖瑞泰精密机械有限公司 | Industrial temperature acquisition control circuit |
| WO2017166092A1 (en) | 2016-03-30 | 2017-10-05 | SZ DJI Technology Co., Ltd. | Method and system for controlling a motor |
| CN106501638A (en) * | 2016-10-11 | 2017-03-15 | 深圳市速普瑞科技有限公司 | A kind of low temperature environment intelligent measuring instrument |
| CN110672968A (en) * | 2019-11-05 | 2020-01-10 | 国网黑龙江省电力有限公司电力科学研究院 | Test system for secondary equipment detection in cold area |
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| CN2396994Y (en) * | 1999-11-18 | 2000-09-20 | 韩志军 | Temp-controlled quick-starting preheater for car |
| CN2451747Y (en) * | 2000-11-27 | 2001-10-03 | 张忠凯 | Preheating device for engine |
| CN2709992Y (en) * | 2004-07-14 | 2005-07-13 | 上海电缆研究所 | Cable testing platform |
| CN201392276Y (en) * | 2009-03-17 | 2010-01-27 | 上海电缆研究所 | Torsion test equipment of cable conductor |
| CN102510246A (en) * | 2012-01-04 | 2012-06-20 | 北京蓝卡软件技术有限公司 | Motor heating method, device and system under low-temperature condition |
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| US7073938B2 (en) * | 2001-10-31 | 2006-07-11 | The Regents Of The University Of Michigan | Micromachined arrayed thermal probe apparatus, system for thermal scanning a sample in a contact mode and cantilevered reference probe for use therein |
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| CN2396994Y (en) * | 1999-11-18 | 2000-09-20 | 韩志军 | Temp-controlled quick-starting preheater for car |
| CN2451747Y (en) * | 2000-11-27 | 2001-10-03 | 张忠凯 | Preheating device for engine |
| CN2709992Y (en) * | 2004-07-14 | 2005-07-13 | 上海电缆研究所 | Cable testing platform |
| CN201392276Y (en) * | 2009-03-17 | 2010-01-27 | 上海电缆研究所 | Torsion test equipment of cable conductor |
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| CN103576017A (en) | 2014-02-12 |
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