CN202340199U - Motor starter and compressor - Google Patents
Motor starter and compressor Download PDFInfo
- Publication number
- CN202340199U CN202340199U CN2011204769594U CN201120476959U CN202340199U CN 202340199 U CN202340199 U CN 202340199U CN 2011204769594 U CN2011204769594 U CN 2011204769594U CN 201120476959 U CN201120476959 U CN 201120476959U CN 202340199 U CN202340199 U CN 202340199U
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- Prior art keywords
- switch
- threshold
- control unit
- motor
- compressor
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Abstract
The utility model discloses a motor starter and compressor. The motor starter comprises a current detection unit, a first switch, a second switch and a control unit, wherein the current detection unit is used for detecting the working current of a motor; the first switch is connected between the current detection unit and a main winding; the second switch is connected between the current detection unit and a starting winding; the control unit comprises a first input end connected to the current detection unit, a first output end connected to the first switch and a second output end connected to the second switch; a first threshold is stored in the control unit and the second switch is disconnected when the working current is smaller than the first threshold for the second time; and the first switch and the second switch are closed when the working current is greater than the first threshold and smaller than the first threshold for the first time. By using the motor starter, and the power consumption in the motor-starting process is low.
Description
Technical field
The utility model relates to the motor starter of actuating motor, also relates to the compressor with motor starter.
Background technology
One Chinese patent application the 200520098936.9th has disclosed a kind of Totally Closed Refrigerating Compressor Non Power Consumption Actuator; This starter comprises bidirectional triode thyristor, is connected with thermistor in the conduction period of bidirectional triode thyristor, and the The Trigger of Bidirectional Triode Thyristor end is connected with a triggering branch road by thermistor or a conventional, electric-resistance and a capacitances in series.The operation principle of this starter is: when compressor start; Trigger resistance and electric capacity conducting triggering bidirectional triode thyristor in the branch road and make the thermistor conducting that the bidirectional triode thyristor conduction terminal is connected; This thermistor rises its resistance value, when its resistance value rises to a maximum through bigger motor auxiliary winding starting current and heating very soon very soon; The electric motor starting circuit is broken off basically, accomplish the startup of compressor.When motor moves, according to the characteristic of electric capacity, when electric capacity after being full of electricity, the triggering branch road that electric capacity and resistance constitute is equivalent to open circuit, thereby, realized no power consumption.
One Chinese patent application discloses a kind of no power consumption PTC starter of electronic type for No. 201020268123.0; This starter is serially connected with on the auxiliary winding of compressor; Form by semistor (PTC resistance), bidirectional triode thyristor, circuits for triggering control board; Semistor and bidirectional triode thyristor are connected on the auxiliary winding of compressor; Semistor and the auxiliary winding linkage section of compressor and the parallelly connected circuits for triggering control board of G interpolar of bidirectional triode thyristor; This circuits for triggering control board is made up of rectifier bridge, electric capacity, resistance, and shunt capacitance, resistance between the positive and negative end of rectifier bridge, the alternating current end of rectifier bridge connect the G utmost point of bidirectional triode thyristor and the auxiliary winding link of semistor and compressor separately.The course of work of above-mentioned no power consumption PTC starter is: when the compressor loads power supply; Closed temperature detect switch (TDS) compressor start; Accomplish the The Trigger of Bidirectional Triode Thyristor conducting through the charging of electric capacity; The starting process of realization compressor is passed through the recovery routine of resistance to capacitance discharges process realization starter after the temperature detect switch (TDS) disconnection, for the next one startup of compressor is got ready.
Though the starter that above-mentioned two patents disclose can actuating motor,, PTC thermistor wherein still has power consumption, and the power consumption of starter is still higher, and makes that power consumption is high in the motor start-up process.
The utility model content
The problem that the utility model solves is the high problem of power consumption in the motor start-up process.
For addressing the above problem; The utility model provides a kind of motor starter; This motor starter is used to control the motor with startup winding and main winding; Comprise current detecting unit, first switch, second switch and control unit, wherein, said current detecting unit is used to detect the operating current of said motor; Said first switch is connected in current detecting unit and said main winding; Said second switch is connected in current detecting unit and said startup winding; Said control unit comprises the first input end that is connected in said current detecting unit, be connected in first output of said first switch and be connected in second output of said second switch; Said control unit internal memory contains first threshold and during for the second time less than said first threshold, breaks off said second switch at said operating current; Said operating current greater than said first threshold with for the first time less than said first threshold the time, closed said first switch and second switch.
Alternatively, said control unit stores second threshold value greater than said first threshold, and breaks off said first switch and second switch during greater than second threshold value at said operating current.
Alternatively, said current detecting unit is little resistance or current transformer.
Alternatively, said first switch and second switch are triac, and two terminals of first switch connect main winding and current detecting unit respectively, and the door end connects first output of said control unit; Two terminals of second switch connect said startup winding and current detecting unit respectively, and the door end connects second output of said control unit.
The utility model also provides a kind of compressor; This compressor is installed on refrigerator or refrigerator; Comprise the motor starter that is connected with the motor of compressor; This motor starter comprises current detecting unit, first switch, second switch and control unit, and wherein, said current detecting unit is used to detect the operating current of said motor; Said first switch is connected in current detecting unit and said main winding; Said second switch is connected in current detecting unit and said startup winding; Said control unit comprises the first input end that is connected in said current detecting unit, be connected in first output of said first switch and be connected in second output of said second switch; Said control unit internal memory contains first threshold and during for the second time less than said first threshold, breaks off said second switch at said operating current; Said operating current greater than said first threshold with for the first time less than said first threshold the time, closed said first switch and second switch.
Alternatively, said control unit stores second threshold value greater than said first threshold, and breaks off said first switch and second switch during greater than second threshold value at said operating current.
Alternatively, said current detecting unit is little resistance or current transformer.
Alternatively, said first switch and second switch are triac, and two terminals of first switch connect main winding and current detecting unit respectively, and the door end connects first output of said control unit; Two terminals of second switch connect said startup winding and current detecting unit respectively, and the door end connects second output of said control unit.
Alternatively, said compressor also comprises temperature inductor, and this temperature inductor is used to respond to the temperature of refrigerator or refrigerator and produces temperature value; Said control unit is at temperature value during less than temperature threshold, and closed said first switch and second switch during greater than temperature threshold, break off said first switch and second switch at temperature value.
Alternatively, said compressor also comprises TIP, and this TIP is used for importing said temperature threshold, first threshold and second threshold value to said control unit.
Compared with prior art, the utlity model has following advantage:
Because the utility model contains first threshold and at said operating current during for the second time less than said first threshold at said control unit internal memory, break off said second switch and make main winding work; At said operating current during greater than said first threshold, closed said first switch makes main winding and the work of startup winding with second switch, so; Can behind electric motor starting, break off second switch through control signal; The power consumption penalty that does not have semistor, the impulse current in the time of also avoiding motor start-up, motor starter low in energy consumption; Reach the purpose of no power consumption in the motor start-up process, improve energy-saving efficiency.
Description of drawings
Fig. 1 is the structural representation of the utility model motor starter;
Fig. 2 and first switch identical with Fig. 1 and second switch all are structural representations of triac;
Fig. 3 is the structural representation that the utility model compressor is connected with temperature inductor.
Embodiment
By the technology contents, the structural feature that specify the utility model, reached purpose and effect, will combine embodiment and conjunction with figs. to specify below.
See also Fig. 1, motor starter is used to control and has main winding M and the motor that starts winding S, comprises current detecting unit 1, first switch 2, second switch 3 and control unit 4.Said current detecting unit 1 is used to detect the operating current of said motor, and said current detecting unit 1 can be little resistance or current transformer.Said first switch is connected in current detecting unit 1 and said main winding M.Said second switch 3 is connected in current detecting unit 1 and said startup winding S.Said control unit 4 internal memories contain first threshold, also comprise the first input end that is connected in said current detecting unit 1, be connected in first output of said first switch 2 and be connected in second output of said second switch 3.Said first output is used to control the disconnection of first switch 2 or closed, and then, make main winding M power up or do not have electricity, so first output also is the main winding control end.Said second output is used to control the disconnection or the closure of second switch 3, and then feasible startup winding S powers up or do not have electricity, so second output also can think to start the winding control end.
Please continue to consult Fig. 1, the motor starter of the utility model is starting to the steady operation process, and operating current can sharply be increased to a peak value; Begin then to descend gradually, tend to be steady at last from peak value, so; In this process, operating current is increased to and has the process of operating current less than said first threshold in this section of peak value process, behind the motor steady operation; Operating current is less than first threshold, and therefore, said control unit 4 is at said operating current during for the second time less than first threshold; This process is considered to the motor steady operation, so, provide control signal and control said second switch 3 disconnections; Like this, start winding S and quit work, when operating current during during greater than first threshold and for the first time less than first threshold; This process is considered to the start-up course of motor, and said control unit 4 is controlled said first switch 2 makes main winding M and startup winding S work with second switch 3 closures.In this process, said motor starter can break off second switch through control unit 4 behind electric motor starting, do not have the power consumption penalty of semistor, reaches the purpose of no power consumption, improves energy-saving efficiency.
Certainly; The utility model is for fear of the damage of overcurrent to motor; Also be provided with second threshold value greater than first threshold in the said control unit 4, said control unit 4, is controlled said first switch and second switch and is broken off during greater than second threshold value at said operating current; Like this, reach the purpose of overcurrent protection.
See also Fig. 2; Said first switch 2 is triacs with second switch 3; The door end of first switch 2 (triac) connects first output of said control unit 4, and two terminals connect said main winding M and current detecting unit 1 respectively.The door end of second switch 3 (triac) connects second output of said control unit 4, and two terminals connect startup winding S and current detecting unit 1 respectively.Adopt such setting; Said control unit 4 gives the door end transmission of control signals of corresponding triac and makes the disconnection of three terminal bidirectional gate-controlled switch perhaps closed, thereby, control main winding M and startup winding S; And then, the startup of control motor.
Based on above-mentioned motor starter, the utility model also provides a kind of compressor, and this compressor is installed on refrigerator or refrigerator, and this compressor also is equipped with aforesaid motor starter.The structure of said motor starter and the course of work repeat no more at this as previously mentioned.
See also Fig. 3, in order to realize automatic control, the compressor of the utility model also comprises temperature inductor 5, and this temperature inductor 5 is used to respond to the temperature of refrigerator or refrigerator and produces temperature value; Said control unit 4 internal memories contain temperature threshold, and at temperature value during less than temperature threshold, closed said first switch 2 and second switch 3; At temperature value during greater than temperature threshold; Break off said first switch 2 and second switch 3, like this, can realize automatic control; Avoid refrigerator or refrigerator in that cross can be still not in running order under the cold or overheated situation, reach purpose of energy saving.
As the improvement of above-mentioned compressor, said compressor also comprises TIP, and this TIP is used for to said control unit 4 input said temperature threshold, first threshold and second threshold values.Certainly, said TIP can be a touch panel, also can be mechanical button.
In addition, the utility model also provides the start-up control method of motor, and this method comprises the steps:
Detect the operating current of motor;
, only power up during at operating current to said main winding for the second time less than first threshold, at operating current during greater than first threshold and for the first time less than said first threshold, to main winding with start winding and power up so that start said motor.
Improvement as said method; Said method also comprises makes main winding be connected with the terminals of first triac; Starting winding is connected with the terminals of second triac; At said operating current during greater than second threshold value, control said first triac and second triac break off and make main winding with start the winding outage; In said operating current little second time during less than first threshold; It is closed to control said first triac; Second triode-thyristor switch breaks off and only powers up to said main winding; Operating current greater than first threshold with for the first time less than first threshold the time, it is closed and power up so that actuating motor to main winding and startup winding control said first triac and second triac.
Claims (7)
1. motor starter is used to control the motor with startup winding and main winding, it is characterized in that: comprise current detecting unit, first switch, second switch and control unit, wherein,
Said current detecting unit is used to detect the operating current of said motor;
Said first switch is connected in current detecting unit and said main winding;
Said second switch is connected in current detecting unit and said startup winding;
Said control unit comprises the first input end that is connected in said current detecting unit, be connected in first output of said first switch and be connected in second output of said second switch; Said control unit internal memory contains first threshold and during for the second time less than said first threshold, breaks off said second switch at said operating current; Said operating current greater than said first threshold with for the first time less than said first threshold the time, closed said first switch and second switch.
2. motor starter according to claim 1 is characterized in that: said control unit stores second threshold value greater than said first threshold, and breaks off said first switch and second switch during greater than second threshold value at said operating current.
3. motor starter according to claim 1 is characterized in that: said current detecting unit is little resistance or current transformer.
4. motor starter according to claim 1; It is characterized in that: said first switch and second switch are triac; Two terminals of first switch connect main winding and current detecting unit respectively, and the door end connects first output of said control unit; Two terminals of second switch connect said startup winding and current detecting unit respectively, and the door end connects second output of said control unit.
5. compressor is installed on refrigerator or refrigerator, it is characterized in that: it comprises any one described motor starter in the claim 1 to 4.
6. compressor according to claim 5 is characterized in that: said compressor also comprises temperature inductor, and this temperature inductor is used to respond to the temperature of refrigerator or refrigerator and produces temperature value; Said control unit is at temperature value during less than temperature threshold, and closed said first switch and second switch during greater than temperature threshold, break off said first switch and second switch at temperature value.
7. compressor according to claim 5 is characterized in that: said compressor also comprises TIP, and this TIP is used for importing said temperature threshold, first threshold and second threshold value to said control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204769594U CN202340199U (en) | 2011-11-25 | 2011-11-25 | Motor starter and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204769594U CN202340199U (en) | 2011-11-25 | 2011-11-25 | Motor starter and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202340199U true CN202340199U (en) | 2012-07-18 |
Family
ID=46488885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204769594U Withdrawn - After Issue CN202340199U (en) | 2011-11-25 | 2011-11-25 | Motor starter and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202340199U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522928A (en) * | 2011-11-25 | 2012-06-27 | 江苏白雪电器股份有限公司 | Motor starter, starting method of motor and compressor |
| CN106786389A (en) * | 2017-01-03 | 2017-05-31 | 安徽美芝制冷设备有限公司 | Overcurrent protective device, frequency-changeable compressor system and refrigerator for frequency-changeable compressor |
| WO2021102771A1 (en) * | 2019-11-28 | 2021-06-03 | Tcl家用电器（合肥）有限公司 | Low-power-consumption motor starter and refrigeration device |
-
2011
- 2011-11-25 CN CN2011204769594U patent/CN202340199U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522928A (en) * | 2011-11-25 | 2012-06-27 | 江苏白雪电器股份有限公司 | Motor starter, starting method of motor and compressor |
| CN102522928B (en) * | 2011-11-25 | 2014-08-06 | 江苏白雪电器股份有限公司 | Motor starter, starting method of motor and compressor |
| CN106786389A (en) * | 2017-01-03 | 2017-05-31 | 安徽美芝制冷设备有限公司 | Overcurrent protective device, frequency-changeable compressor system and refrigerator for frequency-changeable compressor |
| WO2021102771A1 (en) * | 2019-11-28 | 2021-06-03 | Tcl家用电器（合肥）有限公司 | Low-power-consumption motor starter and refrigeration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120718 Effective date of abandoning: 20140806 |
|
| RGAV | Abandon patent right to avoid regrant |