CN202997979U - Positive temperature coefficient thermistor starter - Google Patents
Positive temperature coefficient thermistor starter Download PDFInfo
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- CN202997979U CN202997979U CN 201220677127 CN201220677127U CN202997979U CN 202997979 U CN202997979 U CN 202997979U CN 201220677127 CN201220677127 CN 201220677127 CN 201220677127 U CN201220677127 U CN 201220677127U CN 202997979 U CN202997979 U CN 202997979U
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- thermistor
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Abstract
The utility model relates to a positive temperature coefficient thermistor starter. The positive temperature coefficient thermistor starter comprises a first terminal (1) and a second terminal (2), wherein a start loop and a control loop are arranged between the first terminal (1) and the second terminal (2), the start loop comprises a start thermistor (3), the control loop comprises a control thermistor (4), a resistance value of the control thermistor (4) is greatly greater than that of the start thermistor (3), and the start loop further comprises a temperature sensitive element (5). When temperature of the temperature sensitive element (5) is lower than pre-set driving temperature, the temperature sensitive element (5) is conducted in the start loop; when temperature of the temperature sensitive element (5) is higher than pre-set driving temperature, the temperature sensitive element (5) is disconnected in the start loop.
Description
Technical field
The utility model relates to a kind of semistor starter, especially a kind of semistor starter of low-power consumption.
Background technology
Refrigeration machine (refrigerator) compressor electric motor of motor-for example-motor-drive circuit comprise main winding (Working winding) and auxiliary winding (startup winding), main winding is in parallel with auxiliary winding.Wherein main winding except working when the electric motor starting, also works on when motor normally moves.Auxiliary winding only works when electric motor starting, needs to realize disconnecting after electric motor starting.Usually be cascaded to realize by semistor (PTC) and auxiliary winding at present.When electric motor starting, main winding and auxiliary winding is all worked, and the initial resistance of PTC is less, allows larger electric current to pass through; When motor normally moved, because PTC heating, resistance rise rapidly, auxiliary winding place circuit only had small electric stream to pass through, and auxiliary winding does not participate in work substantially.This less electric current is used for keeping the heating resistance of PTC, thereby produces the approximately power consumption of 3 watts of left and right.This power consumption of keeping the PTC heating has caused the waste of electric energy.
For this situation, technical staff has in the industry carried out various improvement to motor-drive circuit.
The open CN1168022A of Chinese patent application discloses a kind of motor start circuit of form, comprise starting PTC, the triac of connecting with auxiliary winding and the control PTC in parallel with starting PTC, a terminal wherein controlling PTC is connected with the grid of triac.When electric motor starting, triggering signal is provided to grid by controlling PTC, makes triac conduction, and makes starting current flow through auxiliary winding by starting PTC.After electric motor starting, start the PTC self-heating and the resistance increase, thereby reduced to flow through the electric current of auxiliary winding, the resistance of controlling simultaneously PTC also increases, thereby the electric current that flows through grid is reduced and disconnect triac.Do not have in this state electric current to flow through and start PTC, control PTC and only have very little electric current to flow through, thereby make the waste of electric energy greatly reduce.
Chinese patent CN201178391Y discloses a kind of one-way motors idle starter, comprise contact electromagnetic switch and PTC, the fixed contact of electromagnetic switch is connected with the end of PTC, the moving contact of electromagnetic switch and motor main winding exit are connected an end of excitation coil and are connected with electromagnetic switch, the other end of PTC is connected with motor auxiliary winding exit, and the excitation coil other end of electromagnetic switch is connected with an end of external power source.Make motor its start-up circuit after completing startup can realize disconnecting fully by use contact switch, thereby realize the idle starter.
Chinese patent application CN102510248A discloses a kind of low-power consumption PTC starter, comprise a bidirectional triode thyristor and a PTC, the A1 end of bidirectional triode thyristor is connected with motor auxiliary winding exit, the A2 end of bidirectional triode thyristor is connected with motor main winding exit, the G end of bidirectional triode thyristor is connected with the end of PTC, and the other end of PTC is connected with motor main winding exit.Because PTC only uses in the circuits for triggering of bidirectional triode thyristor, the electric current of flowing through is very little, so PTC can do very littlely, thereby it is also very little to keep the required electric current of its heating, realizes the starter for single-phase motor function with very little heating power consumption.
Above low-power consumption or idle starter have all adopted the electronic circuit of certain complexity, have the manufacturing process more complicated, the shortcoming that poor stability and production cost are high.
The utility model content
The purpose of this utility model is to provide a kind of simple in structure, stability is high and cost is low low-power consumption PTC starter.
according to a kind of semistor starter of the present utility model, comprise the first terminal and the second terminal, have the loop of startup and control loop between described the first terminal and described the second terminal, described startup loop comprises the startup thermistor, described control loop comprises the control thermistor, the resistance value of described control thermistor is much larger than the resistance value of described startup thermistor, described startup loop also comprises temperature-sensing element (device), when the temperature of described temperature-sensing element (device) during lower than default actuation temperature, described temperature-sensing element (device) is connected in described startup loop, when default actuation temperature was above, described temperature-sensing element (device) broke in described startup loop when the temperature of described temperature-sensing element (device).
Description of drawings
To the utility model detailed description of preferred embodiment, feature of the present utility model and advantage will be clearer below by by reference to the accompanying drawings.
Fig. 1 has shown according to the stereogram of the utility model PTC starter under assembled state.
Fig. 2 has shown the exploded perspective view according to the PTC starter of the utility model the first execution mode.
Fig. 3 has shown the PTC starter cutaway view along the longitudinal direction according to the utility model the first execution mode.
Fig. 4 has shown according to the PTC starter of the utility model the first execution mode cutaway view along horizontal direction.
Fig. 5 has shown that the PTC starter according to the utility model the first execution mode is connected to the schematic diagram in motor-drive circuit.
Fig. 6 has shown that the PTC starter of executing mode according to the utility model second is connected to the schematic diagram in motor-drive circuit.
Embodiment
Fig. 1 has shown that according to the stereogram of the utility model PTC starter under assembled state, this PTC starter is mainly used in the drive circuit of refrigeration machine (for example refrigerator) compressor electric motor.
Below in conjunction with the primary structure of Fig. 2-4 explanation according to the PTC starter of the utility model the first execution mode.Fig. 2 has shown the exploded perspective view according to the PTC starter of the utility model the first execution mode.Fig. 3 has shown according to the PTC starter of the utility model the first execution mode cutaway view of (length direction) along the longitudinal direction.Fig. 4 has shown according to the PTC starter of the utility model the first execution mode cutaway view along horizontal direction (Width).
As shown in the figure, the PTC starter comprises the first terminal 1 and the second terminal 2.When starter was connected in motor-drive circuit, the first terminal 1 and the second terminal 2 were used for being electrically connected to motor main winding exit and motor auxiliary winding exit respectively.
Described PTC starter also comprises startup thermistor 3 and controls thermistor 4.The first electrode 31 of described startup thermistor 3 is electrically connected to the first terminal 1.The first electrode 41 of described control thermistor 4 and the second electrode 42 are electrically connected to the first terminal 1 and the second terminal 2 respectively.The resistance value of described control thermistor is much larger than the resistance value of described startup thermistor.Preferably, the resistance value of described startup thermistor 3 under 25 ℃ is 3.9～68 Ω, and steady state power is below 3W.Preferably, the resistance value of described control thermistor 4 under 25 ℃ is 1000～1500 Ω, and steady state power is below 0.32W.
Described PTC starter also comprises temperature-sensing element (device) 5.Described temperature-sensing element (device) 5 is preferably bimetal leaf.Described bimetal leaf is preferably creep formula bimetal leaf.The life-span of creep formula bimetal leaf is longer than the life-span of Kick type bimetal leaf, thereby more can satisfy the life requirements of starter.Described temperature-sensing element (device) 5 has stiff end 51 and movable end 52.Described stiff end 51 is electrically connected to the second terminal 2, for example contacts to realize with the second electrode 42 of controlling thermistor 4 by stiff end 51, as shown in Figure 3.During lower than default actuation temperature, the movable end 52 of described temperature-sensing element (device) 5 is electrically connected to the second electrode 32 of described startup thermistor 3 when the temperature of described temperature-sensing element (device) 5.For example, as shown in Figure 3, the conductive substrate 8 that contacts with the movable end 52 of the second electrode 32 that starts thermistor 3 and temperature-sensing element (device) 5 respectively can be set, so that movable end 52 is electrically connected to the second electrode 32.When described temperature-sensing element (device) 5 is heated to default actuation temperature when above, movable end 52 trippings of described temperature-sensing element (device) 5 make movable end 52 and substrate 8 disengage, thereby movable end 52 is electrically connected to the second electrode 32 disconnections that start thermistor 3.In the utility model, described default actuation temperature for example can be 55 ± 5 ℃, and this guarantees that compressor electric motor can start when ambient temperature is no more than 45 ℃, and makes temperature-sensing element (device) can reset rapidly to be used for startup next time.
Another execution mode as temperature-sensing element (device) 5, described temperature-sensing element (device) 5 can have two movable end, during lower than default actuation temperature, two movable end of described temperature-sensing element (device) 5 are electrically connected to the second electrode 32 of the second terminal 2 and described startup thermistor 3 respectively when the temperature of described temperature-sensing element (device) 5.When described temperature-sensing element (device) 5 is heated to default actuation temperature when above, two movable end trippings of described temperature-sensing element (device) 5 are electrically connected to so that described two movable end disconnect with the second electrode 32 of the second terminal 2 and described startup thermistor 3 respectively.
Alternatively, described starter can comprise elastic supporting member for supporting optical member 9.Described elastic supporting member for supporting optical member 9 for example can be arranged between the first electrode 31 and the first terminal 1 that starts thermistor 3, as shown in Figure 3, thereby elastic supporting member for supporting optical member 9 applies elastic force on the first electrode 31 that starts thermistor 3 and the first terminal 1, and 1 formation contacts closely with the first terminal so that elastic supporting member for supporting optical member 9 is with starting thermistor 3.This further makes the first electrode 31 that starts thermistor 3 form more reliable electric connection with the first terminal 1.Certainly, those skilled in the art understand, be not limited in the first electrode 31 sides that start thermistor 3, elastic supporting member for supporting optical member is set, also can elastic supporting member for supporting optical member be set at the second electrode 32 that starts thermistor 3, perhaps also can elastic supporting member for supporting optical member all be set in the both sides that start thermistor 3.
Be connected to operation principle in motor-drive circuit below in conjunction with Fig. 5 explanation according to the PTC starter of the utility model the first execution mode.Fig. 5 has only shown the simple principle figure of the motor-drive circuit that comprises the utility model starter, wherein for simplified characterization, has omitted other electronic devices and components irrelevant with the utility model.
Refrigerator compressor motor-be generally one-way communication motor-mainly comprise main winding (operation winding) L1 and auxiliary winding (startup winding) L2.Two windings have three exits, are respectively that main winding exit M, auxiliary winding exit S and major-minor winding merge exit Z.Wherein, main winding exit M and major-minor winding merging exit Z is connected respectively to power supply (110VAC/220VAC).
The first terminal 1 of PTC starter of the present utility model and the second terminal 2 are electrically connected to motor main winding exit M and motor auxiliary winding exit S respectively.
Have between described the first terminal 1 and described the second terminal 2 and start loop and control loop, described startup loop comprises and starts thermistor 3 and temperature-sensing element (device) 5, and described control loop comprises controls thermistor 4.Described startup loop is in parallel with described control loop.
When motor switches on power when beginning to start, temperature-sensing element (device) 5 is in the first closure state, and the initial resistance that starts thermistor 3 is less, is only for example 3.9～68 Ω, thereby allows larger electric current to pass through.The larger electric current of starter motor is by starting the thermistor 3 auxiliary winding L2 that flows through thus.Simultaneously, the initial resistance of controlling thermistor 4 is for example 1000～1500 Ω, and is much bigger with respect to the initial resistance that starts thermistor 3, and it is much smaller that the electric current of the control thermistor 4 of therefore flowing through starts thermistor 3 with respect to flowing through, and even can ignore.
When motor is completed start-up course and is entered normal operating condition, the electric current that starts thermistor 3 and control thermistor 4 of flowing through makes the thermistor heating up, when making temperature-sensing element (device) 5 reach default actuation temperature, temperature-sensing element (device) 5 is from the tripping of first closure state, make the loop that starts thermistor 3 disconnect, do not have electric current to flow through and start thermistor 3.
Simultaneously, owing to controlling also heating up of thermistor 4, and resistance rises rapidly, controls thermistor 4 and only has small electric stream to pass through with auxiliary winding L2 place circuit, and auxiliary winding L2 does not work substantially.This less electric current is used for keeping the heating resistance of controlling thermistor 4, produces the approximately power consumption of 0.32W left and right.Therefore this power consumption has saved electric energy much smaller than the about power consumption of about 3W of traditional starter.And the heat energy that control thermistor 4 produces is used for the tripping state of holding temperature senser 5, makes the loop that starts thermistor 3 maintain off-state.
Be connected to operation principle in motor-drive circuit below in conjunction with Fig. 6 explanation according to the PTC starter of the utility model the second execution mode.Wherein except circuit connecting mode is different from the first execution mode, basic identical in other parts and the first execution mode, thereby to omitting the description of same parts.
Have the loop of startup and control loop between described the first terminal 1 and described the second terminal 2, described startup loop and described control loop have common return.Described startup loop comprises temperature-sensing element (device) 5, and described control loop comprises controls thermistor 4.Described temperature-sensing element (device) 5 is in parallel with described control thermistor 4.Described common return comprises described startup thermistor 3.
The first terminal 1 and the second terminal 2 are electrically connected to motor main winding exit M and motor auxiliary winding exit S respectively.
The second electrode 42 of described control thermistor is electrically connected to the second terminal 2, and the first electrode 41 of described control thermistor is electrically connected to the second electrode 32 of described startup thermistor.The first electrode 31 of described startup thermistor is electrically connected to the first terminal 1.The two ends of described temperature-sensing element (device) 5 are electrically connected to the second electrode 32 and described second terminal 2 of described startup thermistor respectively.
When motor switches on power when beginning to start, temperature-sensing element (device) 5 is in the first closure state, controls thermistor 4 by short circuit.The initial resistance that starts thermistor 3 is less, is only for example 3.9～68 Ω, thereby allows larger electric current to pass through.The larger electric current of starter motor is by starting the thermistor 3 auxiliary winding L2 that flows through thus.
When motor is completed start-up course and is entered normal operating condition, startup thermistor 3 electric currents of flowing through make the thermistor heating up, when making temperature-sensing element (device) 5 reach default actuation temperature, temperature-sensing element (device) 5 makes and controls thermistor 4 no longer by short circuit from the tripping of first closure state.At this moment, be connected in the circuit at auxiliary winding L2 place together with startup thermistor 3 and control thermistor 4.
Simultaneously, the initial resistance of controlling thermistor 4 is for example 1000～1500 Ω, and is much bigger with respect to the initial resistance that starts thermistor 3.Owing to controlling also heating up of thermistor 4, and resistance rises rapidly, makes auxiliary winding L2 place circuit only have small electric stream to pass through, and auxiliary winding L2 does not work substantially.This less electric current is for keeping the heating resistance of controlling thermistor 4 and starting thermistor 3, much the same power consumption in the circuit of generation and the first execution mode.Therefore this power consumption has saved electric energy much smaller than the about power consumption of about 3W of traditional starter.And, control thermistor 4 and start the tripping state that heat energy that thermistor 3 produces is used for holding temperature senser 5, make to start the loop and maintain off-state.
The utility model is by adopting two PTC and a temperature-sensing element (device) to realize that this starter is simple in structure, stability is high and cost is low for the low-power consumption starter of the motor-drive circuit of motor.
The above is only preferred implementation of the present utility model; but the utility model protection range is not limited to this; any those skilled in the art is in the disclosed technical scope of the utility model; can change at an easy rate or change, and this change or change all should be encompassed in protection range of the present utility model within.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (19)
1. semistor starter, comprise the first terminal (1) and the second terminal (2), have the loop of startup and control loop between described the first terminal (1) and described the second terminal (2), described startup loop comprises startup thermistor (3), described control loop comprises controls thermistor (4), the resistance value of described control thermistor (4) is much larger than the resistance value of described startup thermistor (3)
It is characterized in that,
Described startup loop also comprises temperature-sensing element (device) (5), and when the temperature of described temperature-sensing element (device) (5) during lower than default actuation temperature, described temperature-sensing element (device) (5) is connected in described startup loop; When default actuation temperature was above, described temperature-sensing element (device) (5) broke in described startup loop when the temperature of described temperature-sensing element (device) (5).
2. semistor starter according to claim 1, is characterized in that, described startup loop is in parallel with described control loop.
3. semistor starter according to claim 1, it is characterized in that, described temperature-sensing element (device) (5) is in parallel with described control thermistor (4), and described startup thermistor (3) is included in the common return of described startup loop and described control loop.
4. semistor starter according to claim 2, is characterized in that; First electrode (41) of described control thermistor and the second electrode (42) are electrically connected to the first terminal (1) and the second terminal (2) respectively; First electrode (31) of described startup thermistor is electrically connected to the first terminal (1), and the two ends of described temperature-sensing element (device) (5) are electrically connected to the second electrode (32) and described second terminal (2) of described startup thermistor respectively.
5. semistor starter according to claim 3, it is characterized in that, second electrode (42) of described control thermistor is electrically connected to the second terminal (2), first electrode (41) of described control thermistor is electrically connected to second electrode (32) of described startup thermistor, first electrode (31) of described startup thermistor is electrically connected to the first terminal (1), and the two ends of described temperature-sensing element (device) (5) are electrically connected to the second electrode (32) and described second terminal (2) of described startup thermistor respectively.
6. according to claim 4 or 5 described semistor starters, it is characterized in that, described temperature-sensing element (device) (5) has stiff end (51) and movable end (52), the stiff end of described temperature-sensing element (device) (51) is electrically connected to the second terminal (2), during lower than default actuation temperature, the movable end (52) of described temperature-sensing element (device) (5) is electrically connected to second electrode (32) of described startup thermistor (3) when the temperature of described temperature-sensing element (device) (5); When described temperature-sensing element (device) (5) is heated to default actuation temperature when above, movable end (52) tripping of described temperature-sensing element (device) (5) is electrically connected to so that described movable end (52) disconnects with second electrode (32) of described startup thermistor (3).
7. according to claim 4 or 5 described semistor starters, it is characterized in that, described temperature-sensing element (device) (5) has two movable end, during lower than default actuation temperature, two movable end of described temperature-sensing element (device) (5) are electrically connected to second electrode (32) of the second terminal (2) and described startup thermistor (3) respectively when the temperature of described temperature-sensing element (device) (5); When described temperature-sensing element (device) (5) is heated to default actuation temperature when above, two movable end trippings of described temperature-sensing element (device) (5) are electrically connected to so that described two movable end disconnect with second electrode (32) of the second terminal (2) and described startup thermistor (3) respectively.
8. according to claim 4 or 5 described semistor starters, the resistance value of described startup thermistor (3) under 25 ℃ is 3.9～68 Ω, steady state power is below 3W.
9. according to claim 4 or 5 described semistor starters, is characterized in that, the resistance value of described control thermistor (4) under 25 ℃ is 1000～1500 Ω, and steady state power is below 0.32W.
10. according to claim 4 or 5 described semistor starters, is characterized in that, described temperature-sensing element (device) (5) is bimetal leaf.
11. semistor starter according to claim 10 is characterized in that, described bimetal leaf is the creepage type bimetal leaf.
12. according to claim 4 or 5 described semistor starters is characterized in that described default actuation temperature is 55 ± 5 ℃.
13. according to claim 4 or 5 described semistor starters, it is characterized in that, described starter also comprises the conductive substrate (8) that contacts with the movable end (52) of the second electrode (32) that starts thermistor (3) and temperature-sensing element (device) (5) respectively.
14. according to claim 4 or 5 described semistor starters is characterized in that, described starter also comprises respectively the elastic supporting member for supporting optical member (9) that contacts with the first terminal (1) with the first electrode (31) that starts thermistor (3).
15. semistor starter according to claim 14 is characterized in that, elastic supporting member for supporting optical member (9) applies elastic force on the first electrode (31) that starts thermistor (3) and the first terminal (1).
16. according to claim 4 or 5 described semistor starters, described starter is used for the motor-drive circuit of motor.
17. semistor starter according to claim 16 is characterized in that, described the first terminal (1) and described the second terminal (2) are electrically connected to motor main winding exit (M) and motor auxiliary winding exit (S) respectively.
18. semistor starter according to claim 16 is characterized in that, described motor is the refrigerator compressor motor.
19. semistor starter according to claim 16 is characterized in that, described motor is the one-way communication motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220677127 CN202997979U (en) | 2012-12-10 | 2012-12-10 | Positive temperature coefficient thermistor starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220677127 CN202997979U (en) | 2012-12-10 | 2012-12-10 | Positive temperature coefficient thermistor starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997979U true CN202997979U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220677127 Expired - Lifetime CN202997979U (en) | 2012-12-10 | 2012-12-10 | Positive temperature coefficient thermistor starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969945A (en) * | 2012-12-10 | 2013-03-13 | 森萨塔科技麻省公司 | Positive temperature coefficient thermistor starter |
-
2012
- 2012-12-10 CN CN 201220677127 patent/CN202997979U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969945A (en) * | 2012-12-10 | 2013-03-13 | 森萨塔科技麻省公司 | Positive temperature coefficient thermistor starter |
| CN102969945B (en) * | 2012-12-10 | 2015-07-15 | 森萨塔科技（常州）有限公司 | Positive temperature coefficient thermistor starter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |