CN111756018A - Motor and compressor - Google Patents
Motor and compressor Download PDFInfo
- Publication number
- CN111756018A CN111756018A CN201910238885.1A CN201910238885A CN111756018A CN 111756018 A CN111756018 A CN 111756018A CN 201910238885 A CN201910238885 A CN 201910238885A CN 111756018 A CN111756018 A CN 111756018A
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- China
- Prior art keywords
- protector
- winding
- motor
- secondary winding
- main winding
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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
- 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
- H02H7/0856—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 characterised by the protection measure taken
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/27—Devices for sensing current, or actuated thereby
Abstract
The invention provides a motor and a compressor, wherein the motor is provided with a protection mechanism, the protection mechanism is realized by a protector connected with a main winding and an auxiliary winding of the motor, and when the motor is applied to the compressor, the problem that the auxiliary winding of the motor is easily burnt due to the failure of a starting relay of the compressor can be avoided. In addition, the motor not only can be used for a compressor started in a capacitor starting mode, but also can be used in occasions where the auxiliary winding of the motor needs to be protected independently.
Description
Technical Field
The invention relates to the technical field of motor protection, in particular to a motor and a compressor.
Background
At present, most single-phase power compressors adopt a capacitor starting mode (PSC), when the compressors cannot be normally started due to insufficient motor starting torque, a starting capacitor is usually connected in parallel to an operating capacitor and used for increasing the starting torque so as to improve the starting performance of the compressors, and the mode for normally starting the compressors is called a capacitor starting mode (CSR). The on-off of the starting capacitor in the CSR mode is controlled by a starting relay, and after the compressor is completely started, the starting capacitor is cut off by the starting relay.
At present, the thermal overload protector of this kind of starting means connects the common terminal at compressor motor major-minor winding usually among the prior art, its break-make is mainly controlled by motor common terminal current, start-up relay if can normally work, then the compressor can be protected to the thermal overload protector, but when the compressor power is lower, start-up relay has the phenomenon of low-voltage adhesion, start-up capacitor can't break off from the circuit like this, just be equivalent to start-up capacitor has become the operating capacitance, so can make compressor coil current and winding temperature increase, and generally, minor winding enameled wire line diameter is thinner, more sensitive to the electric current, the minor winding burns out very easily under such circumstances.
Disclosure of Invention
The invention aims to provide a motor and a compressor, which aim to solve the problem that an auxiliary winding of the existing motor is easy to burn.
In order to solve the technical problem, the present invention provides a motor, including a main winding and an auxiliary winding, where the main winding and the auxiliary winding are connected to form a common terminal, and the motor further includes a first protector and a second protector, where an operating current of the first protector is smaller than an operating current of the second protector, when a current flowing through the auxiliary winding reaches the operating current of the first protector, the first protector powers off the auxiliary winding, and when the current flowing through the main winding reaches the operating current of the second protector, the second protector powers off the main winding.
Optionally, in the motor, the first protector is inserted between the secondary winding and the common terminal; the second protector is connected between the main winding and the public end.
Optionally, in the motor, the first protector includes a first bimetal and a first heating wire, the second protector includes a second bimetal and a second heating wire, and the first protector is connected to the secondary winding through the first heating wire; and the second protector is connected with the main winding through the second heating wire.
Optionally, in the electric machine, the first protector is interposed between the secondary winding and the common terminal; the second protector is connected with the main winding and the first protector through the common end respectively.
Optionally, in the motor, the first protector includes a first bimetal and a first heating wire, the second protector includes a second bimetal and a second heating wire, and the first protector is connected to the secondary winding through the first heating wire; the second protector is connected with the public end through the second heating wire.
Optionally, in the motor, the motor further includes a casing, the main winding and the auxiliary winding are disposed in the casing, and the first protector and the second protector are disposed in the casing or outside the casing.
The present invention also provides another motor including a main winding and an auxiliary winding, and further including a third protector that disconnects the main winding and the auxiliary winding when a current flowing through the main winding or a current flowing through the auxiliary winding reaches an operating current of the third protector.
Optionally, in the motor, the third protector includes a third bimetal and two heating wires connected to the third bimetal, one of the heating wires of the third protector is connected to the main winding, and the other heating wire is connected to the secondary winding.
Optionally, in the motor, the motor further includes a casing, the main winding and the auxiliary winding are disposed in the casing, and the third protector is disposed in the casing or outside the casing.
The invention also provides a compressor, which comprises a starting relay, an operating capacitor, a starting capacitor and the motor;
the running capacitor is used for starting the motor;
the starting capacitor is used for increasing the starting torque of the motor;
the starting relay is used for controlling the on-off of the starting capacitor.
As described above, the secondary winding of the motor generally has a thinner wire diameter of the enameled wire and is more sensitive to current, the maximum current that the secondary winding can bear is less than the maximum current that the main winding can bear, and the secondary winding is more easily burnt compared with the main winding. However, in the conventional motor protector, the protector is disposed at the common end of the main winding and the secondary winding, and only when the current at the common end reaches the action current of the protector, the protector performs the protection action.
In the motor and the compressor provided by the invention, the motor comprises a main winding and an auxiliary winding, the main winding and the auxiliary winding are connected to form a common end, the motor further comprises a first protector and a second protector, the action current of the first protector is smaller than that of the second protector, when the current flowing through the auxiliary winding reaches the action current of the first protector, the first protector enables the auxiliary winding to be powered off to protect the auxiliary winding from being burnt, and when the current flowing through the main winding reaches the action current of the second protector, the second protector enables the main winding to be powered off to protect the main winding from being burnt.
Compared with the prior art, the secondary winding is protected by the first protector, and the primary winding is protected by the second protector; when the currents of the main winding and the secondary winding are synchronously increased, the first protector is used for protecting the secondary winding, and when the current of the main winding is further increased, the second protector is used for protecting the main winding, so that the situation that the secondary winding is burnt out even though the current of a common end is increased can be avoided.
In another motor provided by the present invention, the motor includes a main winding and an auxiliary winding, and the motor further includes a third protector, and when a current flowing through the main winding or a current flowing through the auxiliary winding reaches an operating current of the third protector, the third protector de-energizes the main winding and the auxiliary winding to protect the main winding and the auxiliary winding from being burned.
Compared with the prior art, when the maximum current which can be borne by the main winding or the secondary winding is reached, the third protector performs protection action, so that the situation that the secondary winding is burnt out even though the current of the common end is increased can be avoided.
Drawings
Fig. 1 is a circuit diagram of a motor and a compressor according to a first embodiment of the present invention;
FIG. 2 is a circuit diagram of a motor and a compressor according to a second embodiment of the present invention;
fig. 3 is a circuit diagram of a motor and a compressor according to a third embodiment of the present invention;
wherein the reference numerals are as follows:
1-a motor; 11-a main winding; 12-a secondary winding; a-a common terminal; 13-a first protector; 131-a first bimetal sheet; 132-a first heating wire; 14-a second protector; 141-a second bimetallic sheet; 142-a second heating wire; 101-a compressor; 2-starting a relay; 3-running capacitance; 4-starting a capacitor; 15-a third protector; 151-third metal sheet; 152-a third heating wire; 21-a first end; 22-a second end; 23-a third end; 24-fourth end.
Detailed Description
The core idea of the invention is to provide a motor with a protection mechanism, which can avoid the problem that the secondary winding of the motor is easy to burn down due to the failure of a starting relay of a compressor when the motor is applied to the compressor.
The protection mechanism of the motor is realized by the protector connected with the main winding and the auxiliary winding, the working principle of the protector is that the bimetal senses the ambient temperature, the ambient temperature of the bimetal rises by the current of the heating wire, and when the current of the heating wire reaches the action current, the temperature sensed by the bimetal reaches the action temperature, the protector acts to cut off the circuit.
The motor provided by the invention not only can be used for a compressor started in a Capacitor Start (CSR) mode, but also can be used for occasions needing to independently protect the auxiliary winding of the motor.
The motor and the compressor according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
< example one >
Referring to fig. 1, a motor 1 according to an embodiment of the present invention includes a main winding 11 and an auxiliary winding 12, where the main winding 11 and the auxiliary winding 12 are connected to form a common terminal a, the motor 1 further includes a first protector 13 and a second protector 14, and the first protector 13 is inserted between the auxiliary winding 12 and the common terminal a; the second protector 14 is interposed between the main winding 11 and the common terminal a.
The operating current of the first protector 13 is smaller than the operating current of the second protector 14, the first protector 13 disconnects the secondary winding 12 when the current flowing through the secondary winding 12 reaches the operating current of the first protector 13, and the second protector 14 disconnects the primary winding 11 when the current flowing through the primary winding 11 reaches the operating current of the second protector 14.
The secondary winding 12 is protected by the first protector 13, and the primary winding 11 is protected by the second protector 14; when the currents of the main winding 11 and the secondary winding 12 are synchronously increased, the first protector 13 is used for protecting the secondary winding 12, and when the current of the main winding 11 is further increased, the second protector 14 is used for protecting the main winding 11, so that the situation that the secondary winding 12 is burnt out even though the current of the common end a is increased can be avoided.
Specifically, the first protector 13 includes a first bimetal 131 and a first heating wire 132, the second protector 14 includes a second bimetal 141 and a second heating wire 142, and the first protector 13 is connected to the secondary winding 12 through the first heating wire 132; the second protector 14 is connected to the main winding 11 via the second heating wire 142.
The motor further includes a housing (not shown), the main winding 11 and the sub winding 12 are provided in the housing, and the first protector 13 and the second protector 14 are provided in the housing or outside the housing.
Referring to fig. 1, the embodiment of the present invention further provides a compressor 101, where the compressor 101 includes a starting relay 2, an operating capacitor 3, a starting capacitor 4, and the motor 1.
The running capacitor 3 is used for starting the motor 1; the starting capacitor 4 is used for increasing the starting torque of the motor 1; the starting relay 2 is used for controlling the on-off of the starting capacitor 4.
Wherein, the running capacitor 3 and the starting capacitor 4 are connected in parallel between the main winding 11 and the secondary winding 12 of the motor 1, and the starting relay 2 comprises four terminals: a first terminal 21, a second terminal 22, a third terminal 23 and a fourth terminal 24, wherein the first terminal 21 is connected to the secondary winding 12, the second terminal 22 is connected to the common terminal a, and the third terminal 23 is connected to the starting capacitor. When the first terminal 21 is connected to the third terminal 23, the start capacitor 4 is in a conducting state, and when the first terminal 21 is connected to the four terminals 24, the start capacitor 4 is in a disconnecting state. Ideally, when the motor 1 is started, the first terminal 21 of the start relay should be connected to the fourth terminal 24, so that the start capacitor 4 is disconnected from the circuit. In fact, the conventional compressor is liable to fail due to the adhesion caused by the low voltage of the power supply (the first terminal 21 and the third terminal 23 are kept connected), so that the starting capacitor 4 cannot be disconnected from the circuit, and the secondary winding 12 is burnt out due to the excessive current.
For the compressor provided in this embodiment, since the action current of the first protector 13 is set to be relatively small, when the start relay 2 fails, the first protector 13 will act first, so that the secondary winding 12 is powered off, thereby protecting the secondary winding 12 from being burnt, when the first protector 13 is still powered on after acting, the current of the primary winding 11 will further increase, and when the action current of the second protector 14 is reached, the second protector 14 will act, so that the primary winding 11 is powered off, thereby preventing the primary winding 11 from being burnt.
Therefore, the motor 1 and the compressor 101 provided by the embodiment of the invention can not burn the main winding 11 and the auxiliary winding 12 due to the failure of the starting relay 2.
< example two >
Referring to fig. 2, a motor 1 according to an embodiment of the present invention includes a main winding 11 and an auxiliary winding 12, where the main winding 11 and the auxiliary winding 12 are connected to form a common terminal a, the motor further includes a first protector 13 and a second protector 14, and the first protector 13 is inserted between the auxiliary winding 12 and the common terminal a; the second protector 14 is connected to the main winding 11 and the first protector 13 through the common terminal a, respectively.
The operating current of the first protector 13 is smaller than the operating current of the second protector 14, the first protector 13 disconnects the secondary winding 12 when the current flowing through the secondary winding 12 reaches the operating current of the first protector 13, and the second protector 14 disconnects the primary winding 11 when the current flowing through the primary winding 11 reaches the operating current of the second protector 14.
The secondary winding 12 is protected by the first protector 13, and the primary winding 11 is protected by the second protector 14; when the currents of the main winding 11 and the secondary winding are synchronously increased, the first protector 13 is used for performing a protection action on the secondary winding 12, and when the current of the main winding 11 is further increased, the second protector 14 is used for performing a protection action on the main winding 11, so that the situation that the secondary winding 12 is burnt out even though the current of the common end a is increased can be avoided.
Specifically, the first protector 13 includes a first bimetal 131 and a first heating wire 132, the second protector 14 includes a second bimetal 141 and a second heating wire 142, and the first protector 13 is connected to the secondary winding 12 through the first heating wire 132; the second protector 14 is connected to the main winding 11 via the second heating wire 142.
In addition, the motor further comprises a casing, the main winding 11 and the secondary winding 12 are arranged in the casing, and the first protector 13 and the second protector 14 are arranged in the casing or outside the casing.
Referring to fig. 2, based on the motor 1, an embodiment of the present invention further provides a compressor 101, where the compressor 101 includes a starting relay 2, an operating capacitor 3, a starting capacitor 4, and the motor 1.
Wherein the running capacitor 3 is used for starting the motor; the starting capacitor 4 is used for increasing the starting torque of the motor; the starting relay 2 is used for controlling the on-off of the starting capacitor 4.
Wherein, the running capacitor 3 and the starting capacitor 4 are connected in parallel between the main winding 11 and the secondary winding 12 of the motor 1, and the starting relay 2 comprises four terminals: a first terminal 21, a second terminal 22, a third terminal 23 and a fourth terminal 24, wherein the first terminal 21 is connected to the secondary winding 12, the second terminal 22 is connected to the common terminal a, and the third terminal 23 is connected to the starting capacitor. When the first terminal 21 is connected to the third terminal 23, the start capacitor 4 is in a conducting state, and when the first terminal 21 is connected to the four terminals 24, the start capacitor 4 is in a disconnecting state. Ideally, when the motor 1 is started, the first terminal 21 of the start relay should be connected to the fourth terminal 24, so that the start capacitor 4 is disconnected from the circuit. In fact, the conventional compressor is liable to fail due to the adhesion caused by the low voltage of the power supply (the first terminal 21 and the third terminal 23 are kept connected), so that the starting capacitor 4 cannot be disconnected from the circuit, and the secondary winding 12 is burnt out due to the excessive current.
For the compressor 101 provided in this embodiment, when the start relay 2 fails, the currents of the main winding 11 and the auxiliary winding 12 both increase, and if the current of the common terminal a reaches the operating current of the second protector 14 at this time, the second protector 14 operates, and the compressor 101 is stopped; if the current of the common terminal a does not reach the operating current of the second protector 14, the first protector 13 operates first to cut off the power of the secondary winding 12, so as to protect the secondary winding 12 from being burnt, and at this time, the main winding 11 is still electrified, but the current of the main winding 11 is further increased, and when the current of the common terminal a reaches the operating current of the first protector 13, the first protector 13 operates to cut off the power of the main winding 11, so as to protect the main winding 11 from being burnt.
Therefore, the motor 1 and the compressor 101 provided by the embodiment of the invention do not burn the main winding 11 and the auxiliary winding 12 due to the failure of the starting relay 2.
< example three >
Referring to fig. 3, the motor 1 according to the embodiment of the present invention includes a main winding 11 and a secondary winding 12, and the motor 1 further includes a third protector 15, where when a current flowing through the main winding 11 or a current flowing through the secondary winding 12 reaches an operating current of the third protector 15, the third protector 15 powers off the main winding 11 and the secondary winding 12 to protect the main winding 11 and the secondary winding 12 from being burned.
Specifically, the third protector 15 includes a third bimetal 151 and two heating wires 152 connected to the third bimetal 151, one of the third protector 15 includes the heating wire 152 connected to the main winding 11, and the other heating wire 152 connected to the secondary winding 12.
That is, the third protector 15 is used for the main winding 11 and the sub winding 12, but the third protector 15 has two heating wires 152, and the two heating wires 152 are connected in parallel and then connected in series with a common bimetal 151.
The electric machine 1 further comprises a housing (not shown), the main winding 11 and the secondary winding 12 are disposed in the housing, and the third protector 15 is disposed in the housing or disposed outside the housing.
Referring to fig. 3, based on the motor 1, an embodiment of the present invention further provides a compressor 101, where the compressor 101 includes a starting relay 2, an operating capacitor 3, a starting capacitor 4, and the motor 1.
Wherein the running capacitor 3 is used for starting the motor 1; the starting capacitor 4 is used for increasing the starting torque of the motor 1; the starting relay 2 is used for controlling the on-off of the starting capacitor 4.
Wherein, the running capacitor 3 and the starting capacitor 4 are connected in parallel between the main winding 11 and the secondary winding 12 of the motor 1, and the starting relay 2 comprises four terminals: a first terminal 21, a second terminal 22, a third terminal 23 and a fourth terminal 24, wherein the first terminal 21 is connected to the secondary winding 12, the second terminal 22 is connected to the common terminal a, and the third terminal 23 is connected to the starting capacitor. When the first terminal 21 is connected to the third terminal 23, the start capacitor 4 is in a conducting state, and when the first terminal 21 is connected to the four terminals 24, the start capacitor 4 is in a disconnecting state. Ideally, when the motor 1 is started, the first terminal 21 of the start relay should be connected to the fourth terminal 24, so that the start capacitor 4 is disconnected from the circuit. In fact, the conventional compressor is liable to fail due to the adhesion caused by the low voltage of the power supply (the first terminal 21 and the third terminal 23 are kept connected), so that the starting capacitor 4 cannot be disconnected from the circuit, and the secondary winding 12 is burnt out due to the excessive current.
For the compressor 101 provided in the embodiment of the present invention, when the start relay 2 fails, the currents of the main winding 11 and the secondary winding 12 both increase, and when the current flowing through the main winding 11 or the secondary winding 12 reaches the action current of the third protector 15, the bimetal 151 of the third protector 15 is triggered to act, so as to cut off the corresponding circuit, and protect the motor 1 of the compressor 101 from being burnt.
Therefore, the motor 1 and the compressor 101 provided by the embodiment of the invention do not burn the main winding 11 and the auxiliary winding 12 due to the failure of the starting relay 2.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. The utility model provides a motor, the motor includes main winding and secondary winding, the main winding with the secondary winding links to each other and forms a common port, its characterized in that, the motor still includes first protector and second protector, the action current of first protector is less than the action current of second protector, flows through when the electric current of secondary winding reaches during the action current of first protector, first protector makes the secondary winding outage, flows through when the electric current of main winding reaches during the action current of second protector, the second protector makes the main winding outage.
2. The motor of claim 1, wherein said first protector is interposed between said secondary winding and said common terminal; the second protector is connected between the main winding and the public end.
3. The motor of claim 2, wherein the first protector comprises a first bimetal and a first heating wire, and the second protector comprises a second bimetal and a second heating wire, and the first protector is connected to the secondary winding through the first heating wire; and the second protector is connected with the main winding through the second heating wire.
4. The motor of claim 1, wherein said first protector is interposed between said secondary winding and said common terminal; the second protector is connected with the main winding and the first protector through the common end respectively.
5. The motor of claim 4, wherein the first protector comprises a first bimetal and a first heating wire, and the second protector comprises a second bimetal and a second heating wire, and the first protector is connected to the secondary winding through the first heating wire; the second protector is connected with the public end through the second heating wire.
6. The electric machine of claim 1 further comprising a housing, said primary winding and said secondary winding being disposed within said housing, said first protector and said second protector being disposed within or outside said housing.
7. An electric motor comprising a main winding and an auxiliary winding, characterized in that the electric motor further comprises a third protector, wherein the third protector causes the main winding and the auxiliary winding to be de-energized when a current flowing through the main winding or a current flowing through the auxiliary winding reaches an operating current of the third protector.
8. The motor of claim 7, wherein said third protector includes a third bimetal and two heating wires connected to said third bimetal, one of said heating wires of said third protector being connected to said primary winding and the other of said heating wires being connected to said secondary winding.
9. The electric machine of claim 7 further comprising a housing, said primary winding and said secondary winding being disposed within said housing, said third protector being disposed within or outside said housing.
10. A compressor comprising start relays, run capacitors, start capacitors and a motor according to any one of claims 1 to 9;
the running capacitor is used for starting the motor;
the starting capacitor is used for increasing the starting torque of the motor;
the starting relay is used for controlling the on-off of the starting capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238885.1A CN111756018A (en) | 2019-03-27 | 2019-03-27 | Motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238885.1A CN111756018A (en) | 2019-03-27 | 2019-03-27 | Motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111756018A true CN111756018A (en) | 2020-10-09 |
Family
ID=72671852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910238885.1A Pending CN111756018A (en) | 2019-03-27 | 2019-03-27 | Motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111756018A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1717859A (en) * | 2002-11-29 | 2006-01-04 | 山田电机制造株式会社 | Starting device for single-phase induction motor |
| CN201248001Y (en) * | 2008-08-28 | 2009-05-27 | 刘焕宝 | Low-voltage startup running single-phase motor |
| CN202228328U (en) * | 2011-08-15 | 2012-05-23 | 广州万固压缩机有限公司 | Dual protector of compressor |
| CN205489994U (en) * | 2016-04-13 | 2016-08-17 | 四川嘉能机电有限公司 | Single phase motor circuit structure of two protectors in area |
| CN106684846A (en) * | 2016-07-18 | 2017-05-17 | 丛伟滋 | Protective circuit used in starting and operating processes of single-phase asynchronous motor |
| CN208143028U (en) * | 2018-05-28 | 2018-11-23 | 黄石东贝电器股份有限公司 | A kind of tap electric machine assembly |
-
2019
- 2019-03-27 CN CN201910238885.1A patent/CN111756018A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1717859A (en) * | 2002-11-29 | 2006-01-04 | 山田电机制造株式会社 | Starting device for single-phase induction motor |
| CN201248001Y (en) * | 2008-08-28 | 2009-05-27 | 刘焕宝 | Low-voltage startup running single-phase motor |
| CN202228328U (en) * | 2011-08-15 | 2012-05-23 | 广州万固压缩机有限公司 | Dual protector of compressor |
| CN205489994U (en) * | 2016-04-13 | 2016-08-17 | 四川嘉能机电有限公司 | Single phase motor circuit structure of two protectors in area |
| CN106684846A (en) * | 2016-07-18 | 2017-05-17 | 丛伟滋 | Protective circuit used in starting and operating processes of single-phase asynchronous motor |
| CN208143028U (en) * | 2018-05-28 | 2018-11-23 | 黄石东贝电器股份有限公司 | A kind of tap electric machine assembly |
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Application publication date: 20201009 |