CN108963978A - Alternating current generator overheating protection control system and control method - Google Patents
Alternating current generator overheating protection control system and control method Download PDFInfo
- Publication number
- CN108963978A CN108963978A CN201810793124.8A CN201810793124A CN108963978A CN 108963978 A CN108963978 A CN 108963978A CN 201810793124 A CN201810793124 A CN 201810793124A CN 108963978 A CN108963978 A CN 108963978A
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- China
- Prior art keywords
- alternating current
- current generator
- zero cross
- power supply
- detection circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- H02H7/0852—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 directly responsive to abnormal temperature by using a temperature sensor
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- Protection Of Generators And Motors (AREA)
Abstract
The present invention proposes a kind of alternating current generator overheating protection control system and control method; wherein; control system includes alternating current generator, power supply line, control switch and main control MCU, and the terminals of overheat protector for motor are connected serially on a wherein power supply line, and control switch is arranged on another power supply line；It further include zero cross detection circuit; zero cross detection circuit has power connector end and signal output end, wherein power connector end is two; two power connector ends are respectively connected on two power supply lines; with when overheat protector for motor breaks down, so that zero cross detection circuit is generated without zero cross signal, main control MCU and signal output end are electrically connected; to obtain zero cross signal; and when zero cross detection circuit is generated without zero cross signal, control control switch is disconnected, and control air conditioner is shut down；Control method applies above-mentioned control system.The present invention can in time protect system and alternating current generator when alternating current generator overheats.
Description
Technical field
The invention belongs to air-conditioning technical field more particularly to a kind of alternating current generator overheating protection control systems and controlling party
Method.
Background technique
Referring to Fig. 1 and Fig. 2, alternating current generator overheat protector is typically used in series on common end at present, when alternating current generator occurs
After overheat, overheat protector for motor is disconnected, and alternating current generator shuts down at this time, but main control MCU (single-chip microcontroller) can't detect friendship
Galvanic electricity machine breaks down, and powers to alternating current generator always so that power supply can be controlled, while air conditioner will not be out of service, until
Because outdoor machine fan shuts down make system exception occur until.
Before extremely not releasing, air-conditioning internal machine can also repeatedly starting and stopping, specifically: referring to Fig. 1, when alternating current generator occur it is abnormal
When overheat, overheat protector for motor is disconnected, and the power supply of alternating current generator input terminal always exists, and no current flows through in winding, works as electricity
When machine overheat protector temperature drops to recovery temperature, overheat protector for motor is closed again, and alternating current generator can operate again, if
Abnormal not release, alternating current generator can also overheat, and overheat protector for motor disconnects again, repeatedly, until eliminating extremely.
Summary of the invention
The present invention can not in time carry out system and alternating current generator for existing air-conditioning when alternating current generator overheats
The technical issues of protection, proposes that one kind can in time protect system and alternating current generator when alternating current generator overheats
Alternating current generator overheating protection control system, and application the control system alternating current generator control method for over-heating protection.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of alternating current generator overheating protection control system, including alternating current generator, power supply line, control switch and main control MCU, institute
It states alternating current generator and is provided with overheat protector for motor, the power supply line is two, and the control switch is connected to the power supply line
On, the main control MCU and the control switch are electrically connected, and to control the folding of the control switch, the motor overheating is protected
The terminals of shield device are connected serially on a wherein power supply line, and the control switch is arranged on another power supply line；
It further include zero cross detection circuit, the zero cross detection circuit has power connector end and signal output end, wherein the power supply connects
Connecing end is two, and two power connector ends are respectively connected on two power supply lines, to protect when the motor overheating
When shield device breaks down, so that the zero cross detection circuit is generated without zero cross signal, the main control MCU and the signal output end
It is electrically connected, to obtain zero cross signal, and when the zero cross detection circuit is generated without zero cross signal, controls the control
Switch disconnects, and control air conditioner is shut down.
Preferably, the alternating current generator has machine winding, the overheat protector for motor is set to the alternating current
In the machine winding of machine.
Preferably, two power supply lines are respectively firewire and zero curve, the terminals string of the overheat protector for motor
It is coupled on zero curve, the control switch is arranged on firewire.
Preferably, two power supply lines are respectively firewire and zero curve, the terminals string of the overheat protector for motor
It is coupled on firewire, the control switch is arranged on zero curve.
Preferably, further including outdoor machine fan, the main control MCU and the outdoor machine fan are electrically connected, to work as
When the zero cross detection circuit is generated without zero cross signal, controls the outdoor machine fan and shut down.
Preferably, the control switch is relay.
A kind of alternating current generator control method for over-heating protection, using alternating current generator overheating protection control system as described above,
The following steps are included:
Detect whether the zero cross detection circuit has zero cross signal generation, if the zero cross detection circuit has zero cross signal production
It is raw, then it is kept closed the control switch, and operate normally air conditioner, if the zero cross detection circuit is without mistake
Zero-signal generates, then disconnects the control switch, and shut down air conditioner.
Compared with prior art, the advantages and positive effects of the present invention are:
(1) alternating current generator overheating protective control device of the present invention, by being connected serially to the terminals of overheat protector for motor
Wherein on a power supply line, control switch is arranged on another power supply line, and setting zero cross detection circuit, is working as motor
When overheat protector breaks down because of alternating current generator overheat, main control MCU is immediately detected zero cross detection circuit without zero cross signal
It generates, control switch disconnection is then on the one hand immediately controlled, to block power supply of the power supply line to alternating current generator, on the other hand
Complete machine shutdown is immediately controlled, is abnormal to avoid machine system, and then improves complete machine reliability of operation and complete machine
Service life.
(2) alternating current generator control method for over-heating protection of the present invention, when overheat protector for motor is due to alternating current generator overheats
When breaking down, zero cross detection circuit can be immediately detected and generated without zero cross signal, control is then on the one hand immediately controlled and opens
Shutdown is opened, and to block power supply of the power supply line to alternating current generator, complete machine shutdown is immediately controlled, on the other hand to avoid complete machine system
System is abnormal, and then improves the service life of complete machine reliability of operation and complete machine.
Detailed description of the invention
Fig. 1 is existing alternating current generator wiring schematic diagram；
Fig. 2 is the control schematic diagram of existing alternating current generator；
Fig. 3 is the structural schematic diagram of alternating current generator overheating protection control system of the present invention；
In above each figure: 1, alternating current generator；2, power supply line；3, control switch；4, main control MCU；5, overheat protector for motor；
6, zero cross detection circuit.
Specific embodiment
In the following, the present invention is specifically described by illustrative embodiment.It should be appreciated, however, that not into one
In the case where step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiments
In.
In the description of the present invention, it should be understood that (1) electric connection of the present invention, either wired company
It connects, is also possible to be wirelessly connected；(2) orientation or position of the instructions such as term "inner", "outside", "upper", "lower", "front", "rear" are closed
System is positional relationship based on the figure, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.
Referring to Fig. 3, a kind of alternating current generator overheating protective control device, including alternating current generator 1, power supply line 2, control switch 3
And main control MCU 4, alternating current generator 1 are provided with overheat protector for motor 5, overheat protector for motor 5 is when 1 temperature of alternating current generator height
It is disconnected when preset value, so that alternating current generator 1 is because that no current circulates is out of service, power supply line 2 is two, i.e. respectively firewire
And zero curve, control switch 3 are connected on power supply line 2, control switch 3 both can connect on firewire or can connect in zero curve
On, control switch 3 realizes the on-off for flowing to 1 electric current of alternating current generator by opening and closing, and main control MCU 4 and control switch 3 are electrically connected,
To control the folding of control switch 3, main control MCU 4 when receiving fault-signal, can control complete machine shutdown, and the above are abilities
Field technique personnel's known technology；When alternating current generator overheats, in order in time to machine system and alternating current generator 1 into
Row protection, the present invention use following technological means:
The terminals of overheat protector for motor 5 are connected serially on a wherein power supply line 2, and control switch 3 is arranged at another
On power supply line 2, with this after overheat protector for motor 5 is disconnected because of the overheat of alternating current generator 1, there is no electric current stream on power supply line 2
To alternating current generator 1；Alternating current generator overheating protective control device further includes zero cross detection circuit 6, and zero cross detection circuit 6 has power supply
Connecting pin and signal output end, wherein power connector end is two, and two power connector ends are respectively connected to two power supply lines 2
On, with when overheat protector for motor 5 breaks down, so that zero cross detection circuit 6 is without zero cross signal, (such as voltage zero-cross is detected
Signal) it generates, main control MCU 4 and signal output end are electrically connected, and to obtain zero cross signal, and are working as 6 nothing of zero cross detection circuit
When zero cross signal generates, control control switch 3 is disconnected, and control air conditioner is shut down.
It is above-mentioned it should be noted that zero cross detection circuit 6 circuit structure and connection relationship be those skilled in the art
Know technology, those skilled in the art, which can according to need, selects different zero cross detection circuits 6, therefore the present invention examines zero passage
The circuit structure and connection relationship of slowdown monitoring circuit 6 do not repeat them here.
Based on above-mentioned, alternating current generator overheating protective control device of the present invention is by by the terminals of overheat protector for motor 5
It is connected serially on a wherein power supply line 2, control switch 3 is arranged on another power supply line 2, and setting zero cross detection circuit
6, when overheat protector for motor 5 breaks down because of the overheat of alternating current generator 1, main control MCU 4 is immediately detected zero passage detection electricity
Road 6 is generated without zero cross signal, the disconnection of control switch 3 is immediately controlled, on the one hand then to block power supply line 2 to alternating current generator 1
On the other hand power supply is immediately controlled complete machine shutdown, is abnormal to avoid machine system, and then improve complete machine operation
The service life of reliability and complete machine.
Specifically, the setting of control switch 3 exists as shown in figure 3, the terminals of overheat protector for motor 5 are connected serially on zero curve
On firewire, a power connector end of zero cross detection circuit 6 is connected on zero curve, and tie point is located at overheat protector for motor 5
Terminals and alternating current generator 1 between, another power connector end of zero cross detection circuit 6 is connected on firewire, tie point
Side positioned at control switch 3 far from alternating current generator 1, control switch 3 are preferably relay；In addition, alternating current generator 1 has motor
Winding, overheat protector for motor 5 are preferably disposed in the machine winding of alternating current generator 1, alternating current generator overheating protective control device
It further include outdoor machine fan, main control MCU 4 and outdoor machine fan are electrically connected, to produce when zero cross detection circuit 6 without zero cross signal
When raw, outdoor unit blower failure is controlled.
It is above-mentioned it should be noted that the terminals of overheat protector for motor 5 can also be connected serially on firewire, control is opened at this time
3 are closed to be arranged on zero curve.
The present invention also provides a kind of alternating current generator control method for over-heating protection, overheat and protect using alternating current generator as described above
Protect control device, comprising the following steps:
Whether detection zero cross detection circuit 6 has zero cross signal generation, if zero cross detection circuit 6 has zero cross signal generation,
It is kept closed control switch 3, and operates normally air conditioner, if zero cross detection circuit 6 is without zero cross signal (voltage
Detect zero cross signal) it generates, then disconnect control switch 3, and shut down air conditioner.
Based on above-mentioned, alternating current generator control method for over-heating protection of the present invention, when overheat protector for motor 5 is because of alternating current generator
1 overheat and when breaking down, can be immediately detected zero cross detection circuit 6 generates without zero cross signal, then on the one hand controls immediately
Control switch 3 processed disconnects, and to block power supply line 2 to the power supply of alternating current generator 1, complete machine shutdown is on the other hand immediately controlled,
It is abnormal to avoid machine system, and then improves the service life of complete machine reliability of operation and complete machine.
Claims (7)
1. a kind of alternating current generator overheating protection control system, including alternating current generator (1), power supply line (2), control switch (3) and master
It controls MCU (4), the alternating current generator (1) is provided with overheat protector for motor (5), and the power supply line (2) is two, the control
Switch (3) is connected on the power supply line (2), and the main control MCU (4) and the control switch (3) are electrically connected, to control
State the folding of control switch (3), it is characterised in that:
The terminals of the overheat protector for motor (5) are connected serially on a wherein power supply line (2), the control switch
(3) it is arranged on another power supply line (2)；
It further include zero cross detection circuit (6), the zero cross detection circuit (6) has power connector end and signal output end, wherein
The power connector end is two, and two power connector ends are respectively connected on two power supply lines (2), working as
When stating overheat protector for motor (5) and breaking down, so that the zero cross detection circuit (6) is generated without zero cross signal, the master control
MCU (4) and the signal output end are electrically connected, to obtain zero cross signal, and when the zero cross detection circuit (6) are without mistake
When zero-signal generates, the control switch (3) disconnection is controlled, and control air conditioner is shut down.
2. alternating current generator overheating protection control system according to claim 1, it is characterised in that: the alternating current generator (1)
With machine winding, the overheat protector for motor (5) is set in the machine winding of the alternating current generator (1).
3. alternating current generator overheating protection control system according to claim 1, it is characterised in that: two power supply lines
It (2) is respectively firewire and zero curve, the terminals of the overheat protector for motor (5) are connected serially on zero curve, the control switch (3)
It is arranged on firewire.
4. alternating current generator overheating protection control system according to claim 1, it is characterised in that: two power supply lines
It (2) is respectively firewire and zero curve, the terminals of the overheat protector for motor (5) are connected serially on firewire, the control switch (3)
It is arranged on zero curve.
5. alternating current generator overheating protection control system according to claim 1, it is characterised in that: further include outdoor unit wind
Fan, the main control MCU (4) and the outdoor machine fan are electrically connected, when the zero cross detection circuit (6) are without zero cross signal
When generation, controls the outdoor machine fan and shut down.
6. alternating current generator overheating protection control system according to any one of claims 1-5, it is characterised in that: the control
System switch (3) is relay.
7. a kind of alternating current generator control method for over-heating protection, using alternating current generator mistake such as of any of claims 1-6
Thermal protection control system, which comprises the following steps:
Detect whether the zero cross detection circuit (6) has zero cross signal generation, if the zero cross detection circuit (6) has zero cross signal
It generates, is then kept closed the control switch (3), and operate normally air conditioner, if the zero passage detection is electric
Road (6) is generated without zero cross signal, then disconnects the control switch (3), and shut down air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793124.8A CN108963978A (en) | 2018-07-18 | 2018-07-18 | Alternating current generator overheating protection control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793124.8A CN108963978A (en) | 2018-07-18 | 2018-07-18 | Alternating current generator overheating protection control system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108963978A true CN108963978A (en) | 2018-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810793124.8A Pending CN108963978A (en) | 2018-07-18 | 2018-07-18 | Alternating current generator overheating protection control system and control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108963978A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049107A (en) * | 2019-12-13 | 2020-04-21 | 珠海格力电器股份有限公司 | Motor overvoltage protection circuit and motor |
| CN111049106A (en) * | 2019-12-13 | 2020-04-21 | 珠海格力电器股份有限公司 | Motor overvoltage protection circuit and motor |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049107A (en) * | 2019-12-13 | 2020-04-21 | 珠海格力电器股份有限公司 | Motor overvoltage protection circuit and motor |
| CN111049106A (en) * | 2019-12-13 | 2020-04-21 | 珠海格力电器股份有限公司 | Motor overvoltage protection circuit and motor |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 266000 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant after: Hisense (Shandong) Air-conditioning Co., Ltd. Address before: 266000 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: Hisense (Shandong) Air-conditioning Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |