CN109038496B - A kind of two fans linkage protection circuit and method - Google Patents
A kind of two fans linkage protection circuit and method Download PDFInfo
- Publication number
- CN109038496B CN109038496B CN201810650784.0A CN201810650784A CN109038496B CN 109038496 B CN109038496 B CN 109038496B CN 201810650784 A CN201810650784 A CN 201810650784A CN 109038496 B CN109038496 B CN 109038496B
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- China
- Prior art keywords
- master control
- control borad
- parameter
- circuit
- electrical circuits
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Multiple Motors (AREA)
- Protection Of Generators And Motors (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
It links the invention discloses a kind of two fans and protects circuit and guard method; external power supply is through connecting terminal XT; air-conditioning master control borad is supplied electricity to by A.C. contactor KM again; master control borad forms at least four electrical circuits by least two pairs of relays and two motors; the relationship between current value and setup parameter that master control borad passes through at least four electrical circuits of comparison; decision circuit whether there is abnormal phenomenon, take corresponding safeguard measure.The present invention is solved because of electronic relay failure or malfunction, access occurs between two motor different stalls of air conditioner, is caused rotation speed of fan/temperature rise not to be able to satisfy the problem of air-conditioning system requires or even burns motor, is improved the reliability of air-conditioning system.
Description
Technical field
The invention belongs to blower technical field, in particular to a kind of two fans linkage protection circuit and guard method.
Background technique
Two fans air-conditioning incudes tap motor using two single-phase capacitances, passes through 2 electronic relays of control simultaneously
On-off adjusts wind file (the tap winding of the corresponding top grade/middle-grade/low grade of the two motors/low-low on-off simultaneously of motor
Electricity).When electronic relay failure or malfunction, leads to access occur between two motor different stalls, cause two
Motor actual speed, temperaturing lifting abnormality are unable to satisfy the requirement of air-conditioning system, or even burn motor.
Summary of the invention
The purpose of the present invention is in view of the drawbacks of the prior art, provide the circuit company between a kind of avoidable motor difference wind file
Connect failure, the two fans linkage protection circuit for the reliability that air-conditioning system can be improved and guard method.
To achieve the goals above, the invention adopts the following technical scheme: a kind of two fans linkage protection circuit, comprising:
Master control borad, two motors and at least two pairs of relays；The master control borad passes through external power supply through connecting terminal XT, then passes through exchange
Contactor KM power supply, master control borad form at least four electrical circuits by least two pairs of relays and two motors, and master control borad passes through
The relationship between the current value and setup parameter of at least four electrical circuits, failure existing for decision circuit are compared, and is taken corresponding
Safeguard measure.
Further, it is respectively arranged with current sensor on the route of at least four electrical circuits of two motors, for examining
The current value on survey time road.
Further, the quantity of relay is 2~5 pairs, and master control borad forms four to ten by relay and two motors
Electrical circuit.
Further, setup parameter includes the first parameter A and the second parameter B, and wherein A is that machine winding counter electromotive force is formed
Induced current, A is set as 0~0.5 ampere, and B is motor rotation blockage electric current, is set as 5~7 times of rated current of motor, B > A
≥0。
Further, when number of at least four electrical circuit current values greater than B >=1, master control borad decision circuitry be it is serious therefore
Barrier cuts off the power supply of A.C. contactor KM.
Further, at least four electrical circuit current values greater than B number=0 and current value be greater than A number > 2 when,
Master control borad decision circuitry is stealthy path fault, triggers alarm and bright malfunction indicator lamp.
A kind of guard method is used for two fans linkage circuit, and the circuit includes: master control borad, two motors and at least two
To relay；The master control borad is powered by external power supply through connecting terminal XT, then by A.C. contactor KM, and master control borad passes through
At least two pairs of relays and two motors form at least four electrical circuits, and guard method includes:
Detect the current value of at least four electrical circuits；
The first parameter A and the second parameter B are set, wherein A >=0 B >；
Y1: two machine winding currents of setting are greater than the number of parameter A；
Y2: two machine winding currents of setting are greater than the number of parameter B；
Master control borad compares the numerical value of y1, y2, and decision circuit whether there is failure, and take corresponding safeguard measure.
Further, when y2 >=1, master control borad decision circuitry is catastrophe failure, cuts off the power supply of A.C. contactor KM；Y2=
When 0 and y1 > 2, master control borad decision circuitry is stealthy path fault, triggers alarm and bright malfunction indicator lamp；Y1, y2 are unsatisfactory for
Above-mentioned condition is that master board decision circuitry operates normally.
Further, catastrophe failure includes shaft stall, winding major-minor mutually short circuit, winding interturn short-circuit；It is described stealthy logical
Road failure includes relay misoperation work, two motor different stalls while being powered.
Further, the first parameter A is the induced current that machine winding counter electromotive force is formed, and A is set as 0~0.5 ampere；
The second parameter B is motor rotation blockage electric current, is set as 5~7 times of rated current of motor.
The present invention is solved because of electronic relay failure or malfunction, is gone out between two motor different stalls of air conditioner
Existing access, causes rotation speed of fan/temperature rise not to be able to satisfy the problem of air-conditioning system requires or even burns motor, improves air-conditioning system
Reliability.
Detailed description of the invention
Fig. 1 is the circuit diagram of embodiment two fans linkage protection circuit.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
Linked from Fig. 1 two fans and protect the circuit diagram of circuit: external power supply connects through connecting terminal XT, then by exchange
Tentaculum KM supplies electricity to air-conditioning master control borad, and master control borad controls two capacitive sensing motors by the coil of four pairs of relays of control respectively
Four wind file H/M/L/SL (top grade/middle-grade/low grade/low-low).On the route of the wind-speed gear of two motors, each circuit
It is all made of current transformer, detects capacitive sensing motor M1 high wind file, middle wind file, low wind file, the corresponding line electricity of ultralow wind file
Flow valuve i11, i12, i13, i14 and capacitive sensing motor M2 high wind file, middle wind file, low wind file, the corresponding line electricity of ultralow wind file
Flow valuve i21, i22, i23, i24.
According to two motors identical wind file current values to when compared with setup parameter A, B, determining whether motor is deposited
In the abnormal phenomenon such as stealthy access or stall, carry out taking corresponding safeguard measure.Setting functional relation y=f (i) ∈ 0~
8 }, when motor wind-speed gear winding current i is greater than setup parameter, y is started counting.Set y1: two capacitive sensing motor M1/
M2 winding current is greater than the number of parameter A, i.e. i11 and i21, i12 and i22, of i13 and i23, i14 and i24 greater than parameter A
Number；Y2: two capacitive sensing motor M1/M2 winding currents of setting are greater than the number of parameter B, i.e. i11 and i21, i12 and i22,
I13 and i23, i14 and i24 are greater than the number of parameter B, wherein A >=0 B >.
B is motor rotation blockage electric current, is usually set to 5~7 times of rated current of motor；A is machine winding counter electromotive force shape
At induced current, the general setting value of the A of capacitive sensing motor is between 0~0.5 ampere.It is detected, is believed by current transformer
Number it is transferred to air-conditioning control panel master chip, is judged by master chip:
1, when y2 >=1, it is determined as a kind of failure (catastrophe failures such as stall), cuts off power supply；
A kind of failure is shaft stall, winding major-minor mutually short circuit, winding interturn short-circuit etc..
2, work as y2=0, and y1 > 2, be determined as two class failures (stealthy path fault), trigger alarm and bright indicating fault
Lamp, prompt need to contact after-sale service personnel and check problem
It (can only be normally that same gear is logical that two class failures, which are that relay misoperation is made, two motor different stalls are powered simultaneously,
Electricity, such as motor M are top grades, then M2 is also high-grade.It is two class failures if M is middle-grade/low grade/low-low).
3, y1 and y2 is unsatisfactory for the 1st or 2 kind of situation, and unit is operated normally, do not dealt with.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of two fans linkage protection circuit, characterized by comprising: master control borad, two motors and at least two pairs of relays；
The master control borad is powered by external power supply through connecting terminal XT, then by A.C. contactor KM, and master control borad passes through at least two pairs
Relay and two motors form at least four electrical circuits, current value and setting of the master control borad by least four electrical circuits of comparison
Relationship between parameter, failure existing for decision circuit, and take corresponding safeguard measure；
It is respectively arranged with current sensor on the route of at least four electrical circuits of described two motors, the electricity for measure loop
Flow valuve；
The setup parameter includes the first parameter A and the second parameter B, and wherein A is the induced electricity that machine winding counter electromotive force is formed
Stream, A are set as 0~0.5 ampere, and B is motor rotation blockage electric current, is set as 5~7 times of rated current of motor, A >=0 B >；
At least four electrical circuits current value greater than B number >=1 when, master control borad decision circuitry be catastrophe failure, cutting hand over
Flow the power supply of contactor KM；
At least four electrical circuits current value greater than B number=0 and current value be greater than A number > 2 when, master control borad judgement
Circuit is stealthy path fault, triggers alarm and bright malfunction indicator lamp.
2. two fans linkage protection circuit according to claim 1, it is characterised in that: the quantity of the relay is 2~5
Right, master control borad forms four to ten electrical circuits by relay and two motors.
3. a kind of guard method, it to be used for two fans linkage circuit, the circuit includes: master control borad, two motors and at least two pairs
Relay；The master control borad is powered by external power supply through connecting terminal XT, then by A.C. contactor KM, and master control borad is by extremely
Few two pairs of relays and two motors form at least four electrical circuits, it is characterised in that:
Detect the current value of at least four electrical circuits；
The first parameter A and the second parameter B are set, wherein A >=0 B >；
Set the number that y1: at least four electrical circuit current values are greater than the first parameter A；
Set the number that y2: at least four electrical circuit current values are greater than the second parameter B；
Master control borad compares the numerical value of y1, y2, and decision circuit whether there is failure, and take corresponding safeguard measure；
When the y2 >=1, master control borad decision circuitry is catastrophe failure, cuts off the power supply of A.C. contactor KM；Y2=0 and y1 > 2
When, master control borad decision circuitry is stealthy path fault, triggers alarm and bright malfunction indicator lamp；Y1, y2 are unsatisfactory for above-mentioned condition
When, master control borad decision circuitry operates normally；
The first parameter A is the induced current that machine winding counter electromotive force is formed, and A is set as 0~0.5 ampere；Described
Two parameter B are motor rotation blockage electric current, are set as 5~7 times of rated current of motor.
4. guard method according to claim 3, it is characterised in that: the catastrophe failure includes shaft stall, winding master
Secondary mutually short circuit, winding interturn short-circuit；The stealth path fault includes relay misoperation work, two motor different stalls while leading to
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650784.0A CN109038496B (en) | 2018-06-22 | 2018-06-22 | A kind of two fans linkage protection circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650784.0A CN109038496B (en) | 2018-06-22 | 2018-06-22 | A kind of two fans linkage protection circuit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109038496A CN109038496A (en) | 2018-12-18 |
| CN109038496B true CN109038496B (en) | 2019-11-29 |
Family
ID=64610357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810650784.0A Active CN109038496B (en) | 2018-06-22 | 2018-06-22 | A kind of two fans linkage protection circuit and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109038496B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480263B (en) * | 2010-11-30 | 2014-05-07 | 珠海格力电器股份有限公司 | Air conditioner, alternating current motor and speed adjusting device thereof |
| CN203608132U (en) * | 2013-09-30 | 2014-05-21 | 中山大洋电机制造有限公司 | Variable-speed fan motor |
| CN203774999U (en) * | 2014-02-20 | 2014-08-13 | 中山大洋电机股份有限公司 | Multifunctional ECM (electronically commutated motor) and HVAC system applying same |
| CN204985013U (en) * | 2015-07-30 | 2016-01-20 | 成都富强电子电器科技有限公司 | Fire control double speed double fan controlling means |
| CN106094705B (en) * | 2016-06-22 | 2018-10-30 | 珠海格力电器股份有限公司 | A kind of regulating device of motor, motor and its adjusting method |
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2018
- 2018-06-22 CN CN201810650784.0A patent/CN109038496B/en active Active
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| Publication number | Publication date |
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| CN109038496A (en) | 2018-12-18 |
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