CN203984278U - Commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter - Google Patents
Commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter Download PDFInfo
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- CN203984278U CN203984278U CN201420385605.2U CN201420385605U CN203984278U CN 203984278 U CN203984278 U CN 203984278U CN 201420385605 U CN201420385605 U CN 201420385605U CN 203984278 U CN203984278 U CN 203984278U
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- 239000007858 starting material Substances 0.000 title claims abstract description 57
- 238000005057 refrigeration Methods 0.000 title claims abstract description 41
- 238000004804 winding Methods 0.000 claims abstract description 59
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 54
- 239000003990 capacitor Substances 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 18
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- 238000010438 heat treatment Methods 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
A kind of commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter, belongs to starting device of motor technical field.Motor connects permanent operation capacitor C2 between main winding exit M and auxiliary winding exit S, main, auxiliary winding merges the B end that exit L connects AC power, mutual-inductance contactless electric current starter comprises current transformer L1 and bidirectional triode thyristor T, hold with the A that the T1 of one end of secondary coil and bidirectional triode thyristor T is connected AC power extremely jointly one end of current transformer L1 primary coil, the other end of current transformer L1 primary coil is connected with motor main winding exit M, the other end of current transformer L1 secondary coil is connected with the G utmost point of bidirectional triode thyristor T, the T2 utmost point of bidirectional triode thyristor T is connected with motor auxiliary winding exit S.Energy-saving efficiency is high, and circuit structure is simple, and number of elements is few, and versatility is good, can bear large electric current, in ensureing the reliable starting of motor, has improved the fail safe of starting.
Description
Technical field
The utility model belongs to starting device of motor technical field, be specifically related to a kind of commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter, be mainly used in the starting of commercial refrigeration compressor electric motor, also can be used for the starting of common single phase alternating current (A.C.) induction type or single-phase AC permanent-magnet formula motor (following, to be referred to as load motor).
Background technology
Load motor is made up of rotor and stator conventionally, and described stator has major and minor two groups of windings, only has when two stator winding cooperatively interact and could produce starting torque, makes electric motor starting.Due to the difference of project organization, auxiliary winding is except playing the effect of electric motor starting, also can in the time that motor normally moves, continue to work, therefore, the auxiliary winding circuit of complete load motor can be represented by auxiliary winding operation circuit and auxiliary winding starting circuit in parallel conventionally.The motor that during for normal operation, auxiliary winding can not be worked, does not have described auxiliary winding operation circuit; And described auxiliary winding starting circuit is only worked in the time of electric motor starting, when motor completes after starting, auxiliary winding starting circuit need to be disconnected closing its function, make motor be switched to normal operating conditions and realize disconnection.The effect of motor starter when electric motor starting is connected auxiliary winding starting circuit and keeps certain hour exactly, and after motor completes starting process, disconnecting auxiliary winding starting circuit, is conventionally realized by semistor (PTC) element at present.In the time of electric motor starting, the resistance of semistor is its normal temperature resistance, in the time that auxiliary winding starting circuit switches on power participation work, in circuit, can produce larger auxiliary winding starting current.Under the effect of this electric current, PTC element is heating up rapidly, and its resistance increases rapidly, finally makes auxiliary winding starting circuit substantially disconnect.In the time that motor normally moves, in PTC element, still need a small electric that can maintain its heating to flow, for keeping the off-state of auxiliary winding starting circuit.The power consumption being produced on PTC element by this electric current is about 3 watts, and because this kind of motor application is extensive, therefore this heating power consumption can cause a large amount of wastes of electric energy.For the starting of relatively high power compressor (power bracket: 50～400W), mainly rely on Weight type starter, Weight type starter is current mode device, therefore its pull-in winding and compressor operating windings in series need to do strict mating with compressor.Although Weight type starter reliability is high, not perishable, and starting failure (plug is not seated, and system does not form high-low pressure in several seconds) afterwards can starting again within the short time (20 seconds, the best interval of heat engine).But exist, cost is high, contact endurance is limited, inhale the easy defects such as spark or electromagnetic interference that produce while putting.
In published Chinese patent literature, is no lack of the technical information about motor starter, Chinese invention patent Granted publication CN1024157C has introduced a kind of " for starting the electronic circuit of single phase induction motor ", it by using a normality triggering, the bidirectional triode thyristor of timing cut-off and corresponding triggering/timing cut-off circuit in motor starting circuit, realize motor starting circuit and be switched to from energising the conversion that timing disconnects, thereby complete the starting of motor.But the quantity of this circuit discrete component used, for the typical applications of long-term frequent intermittent starting, can reduce the reliability of electric motor starting to a great extent; Especially under electric machine operation state, the operating current of multiple milliamperes is by the multiple transistors in the resistive element in circuits for triggering and timing cut-off circuit, and this electronic circuit operates in complicated machine operation circuit, do not do effectively isolation with complicated power utilization environment, therefore the light current Circuits System of whole fragility does not obtain good protection, brings huge negative effect can to the reliability of electric system; In addition, the bidirectional triode thyristor adopting in this circuit is before motor starting circuit is connected, must realize the reset of timer, must make timer circuit dead electricity, substantially complete after electric discharge through a period of time in timer timing capacitor, could again realize the time delay cut-off of bidirectional triode thyristor, otherwise, as long as there is electric current to exist in circuits for triggering/timing cut-off circuit, bidirectional triode thyristor will be always in cut-off state, cannot complete the transformation of motor from the little current status of non-running to starting.Japanese documentation Unexamined Patent 10-94279 utilizes motor in the starting principle different with electric current under working order, the current sense resistor that utilization is placed in motor total loop changes main circuit current (motor total current) signal into voltage signal, this patent is by setting one " reference current value setting apparatus " and " comparison loop " simultaneously, main circuit current signal and setting current value are compared, control the break-make of the bidirectional triode thyristor sealing in motor starting circuit according to this comparative result, reach with this object of controlling starting circuit break-make.But this circuit utilizes resistance that the current signal in motor total loop is sampled into voltage signal, because resistance is pure resistance element, and the electric current of motor total loop is conventionally all in ampere level or approaching ampere level, therefore in the running of whole motor, this resistance consumption watt level or approach the useless heating power consumption of watt level, make this circuit greatly reduce the utilance of the energy can actuating motor in the situation that; In addition, the auxiliary circuit such as " reference current value setting apparatus " and " comparison loop " has reduced the reliability of electric motor starting function to a certain extent.Two kinds " mutual inductance type non-contact starters " that Chinese invention patent Granted publication CN1294694C and Chinese invention patent Granted publication CN1283037C recommend, are applicable to respectively various dissimilar load motors.The feature of above-mentioned two kinds of mutual inductance type non-contact starters is to adopt current transformer, according to the difference of load motor, at the diverse location of motor circuit, electric current is carried out to sample conversion, for triggering the bidirectional triode thyristor that is serially connected in motor auxiliary winding starting circuit.They have utilized the loop current of motor at the beginning of starting to be far longer than the feature of running current, trigger auxiliary winding bidirectional triode thyristor and make conducting in its short time in the time of electric motor starting, complete the starting of motor with this.And the utility model does not use PTC element, by making Current Transformer and bidirectional triode thyristor be different from the compound mode of Chinese invention patent Granted publication CN1294694C and Chinese invention patent Granted publication CN1283037C, and be aided with inductance, electric capacity is realized the contactless electric current starter of commercial refrigeration compressor electric motor.
In view of above-mentioned prior art, be necessary the structure of existing motor starter to be improved, for this reason, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
Task of the present utility model is to provide that a kind of starting reliability is high, good stability, safe, consumed power is few, versatility is good, and can bear the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter of large electric current.
In order to complete described task, technical scheme provided by the utility model is: a kind of commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter, described commercial refrigeration compressor electric motor has the stator being made up of at least one main winding and auxiliary winding, between main winding exit M and auxiliary winding exit S, be connected with permanent operation capacitor C2, main, auxiliary winding merges the B end that exit L connects AC power, it is characterized in that: described mutual-inductance contactless electric current starter comprises the current transformer L1 and the bidirectional triode thyristor T that possess a primary coil and a secondary coil, described one end of current transformer L1 primary coil and the T1 of one end of secondary coil and bidirectional triode thyristor T are connected to the A end of AC power extremely jointly, the other end of current transformer L1 primary coil is connected with motor main winding exit M, the other end of current transformer L1 secondary coil is connected with the G utmost point of bidirectional triode thyristor T, the T2 utmost point of bidirectional triode thyristor T is connected with motor auxiliary winding exit S.
In a specific embodiment of the present utility model, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises starting capacitance C1, one end of described starting capacitance C1 is connected with the T1 utmost point of bidirectional triode thyristor T, and the other end of starting capacitance C1 and one end of current transformer L1 primary coil and one end of secondary coil are connected to the A end of AC power jointly.
In another specific embodiment of the present utility model, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil is connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the other end of starting capacitance C1 and one end of current transformer L1 secondary coil.
In another specific embodiment of the present utility model, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, and the other end of inductance L 2 is connected with motor auxiliary winding exit S.
In another specific embodiment of the present utility model, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil and one end of secondary coil are connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the other end of starting capacitance C1.
Also have in a specific embodiment of the present utility model, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of described inductance L 2 connects one end of starting capacitance C1, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T.
More of the present utility model and in a specific embodiment, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil is connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T and one end of current transformer L1 secondary coil.
In of the present utility model and then a specific embodiment, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, and the other end of inductance L 2 is connected with motor auxiliary winding exit S.
Of the present utility model again more and in a specific embodiment, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil and one end of secondary coil are connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T.
In again of the present utility model and then a specific embodiment, described commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter also comprises current-limiting resistance R, one end of described current-limiting resistance R is connected with the other end of current transformer L1 secondary coil, and the other end of current-limiting resistance R connects the G utmost point of described bidirectional triode thyristor T.
The utility model is owing to having adopted said structure, compared with prior art, the beneficial effect having: by making the current signal in Current Transformer L1 sampling electric motor loop, can effectively be controlled in current sample process and produce power consumption, thereby greatly improve energy-saving efficiency; In addition, circuit structure is simple, and number of elements is few, and versatility is good, can bear large electric current, in ensureing the reliable starting of motor, and the fail safe that has improved electric motor starting.
Brief description of the drawings
Fig. 1 is the electrical schematic diagram of the 1st kind of embodiment of the present utility model.
Fig. 2 is the electrical schematic diagram of the 2nd kind of embodiment of the present utility model.
Fig. 3 is the electrical schematic diagram of the 3rd kind of embodiment of the present utility model.
Fig. 4 is the electrical schematic diagram of the 4th kind of embodiment of the present utility model.
Fig. 5 is the electrical schematic diagram of the 5th kind of embodiment of the present utility model.
Fig. 6 is the electrical schematic diagram of the 6th kind of embodiment of the present utility model.
Fig. 7 is the electrical schematic diagram of the 7th kind of embodiment of the present utility model.
Fig. 8 is the electrical schematic diagram of the 8th kind of embodiment of the present utility model.
Fig. 9 is the electrical schematic diagram of the 9th kind of embodiment of the present utility model.
Figure 10 is the electrical schematic diagram of the 10th kind of embodiment of the present utility model.
Figure 11 is the electrical schematic diagram of the 11st kind of embodiment of the present utility model.
Figure 12 is the electrical schematic diagram of the 12nd kind of embodiment of the present utility model.
Figure 13 is the electrical schematic diagram of the 13rd kind of embodiment of the present utility model.
Figure 14 is the electrical schematic diagram of the 14th kind of embodiment of the present utility model.
Figure 15 is the electrical schematic diagram of the 15th kind of embodiment of the present utility model.
Figure 16 is the electrical schematic diagram of the 16th kind of embodiment of the present utility model.
Figure 17 is the electrical schematic diagram of the 17th kind of embodiment of the present utility model.
Figure 18 is the electrical schematic diagram of the 18th kind of embodiment of the present utility model.
In figure: C1. starting capacitance, C2. forever move capacitor; L1. current transformer, L2. inductance; T. bidirectional triode thyristor; R. current-limiting resistance.
Embodiment
In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, anyly changes in the form rather than substance and all should be considered as protection range of the present utility model according to the utility model design.
Refer to Fig. 1, Fig. 1 is embodiment 1.A kind of commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter, described commercial refrigeration compressor electric motor has the stator being made up of at least one main winding and auxiliary winding, motor main winding exit is made as M, motor auxiliary winding exit is made as S, and motor main winding and auxiliary winding merges exit and is made as L; The two external links of the external ac power source AC that commercial refrigeration compressor electric motor is corresponding are made as respectively side a and b, and side a and b can exchange.Between main winding exit M and auxiliary winding exit S, be connected with permanent operation capacitor C2, main winding and auxiliary winding merges the B end that exit L connects AC power.Described mutual-inductance contactless electric current starter comprises the current transformer L1 and the bidirectional triode thyristor T that possess a primary coil and a secondary coil, described 1 end of current transformer L1 primary coil and the T1 of 3 ends of secondary coil and bidirectional triode thyristor T are connected to the A end of AC power extremely jointly, 2 ends of current transformer L1 primary coil are connected with motor main winding exit M, 4 ends of current transformer L1 secondary coil are connected with the G utmost point of bidirectional triode thyristor T, and the T2 utmost point of bidirectional triode thyristor T is connected with motor auxiliary winding exit S.Herein, current transformer L1 and bidirectional triode thyristor T are conventional element, and 1,2 ends of current transformer L1 are one end and the other end of primary coil, and 3,4 ends are one end and the other end of secondary coil.
Please continue to refer to Fig. 1, the operation principle of the present embodiment is described.At the beginning of motor starts starting, due to not yet high speed rotating of rotor, in motor main winding loop, can produce a larger starting current.Current transformer L1, because primary coil is serially connected in the main winding loop of motor, therefore can produce a larger secondary induction electric current corresponding to electric motor starting electric current in primary coil in secondary coil.By selecting the parameter of suitable current transformer L1, can make this induced current trigger bidirectional triode thyristor T conducting.After bidirectional triode thyristor T conducting, make motor starter circuit connect and enter operating state.Now, motor starts starting, and rotor speed rises rapidly, and in the time flowing through the alternating current of circuit and reach zero point, motor starter circuit disconnects substantially, and motor enters normal operating condition.Enter after running status at motor, the operating current of motor circuit system also declines to a great extent to and approaches normal operating conditions electric current, and the secondary induction electric current of current transformer L1 also declines to a great extent thereupon, finally cannot trigger bidirectional triode thyristor T conducting, now, motor starter circuit is disconnected completely.Because motor is now in normal operating condition, therefore bidirectional triode thyristor T can not be triggered by the output current of current transformer L1 secondary coil, motor starter circuit will keep current state always, until motor stops operating, realize thus motor starter circuit and only in the time of electric motor starting, participate in work, and disconnect to close its function after motor enters normal operating conditions.This circuit makes Current Transformer L1 gather the current signal in electric motor loop, can effectively control the power consumption in current sample process, empirical tests, this power consumption can lowly reach milliwatt level conventionally, realize usually said " zero-power " commercial refrigeration compressor motor starter, thereby greatly improved energy-saving efficiency.
Refer to Fig. 2, Fig. 2 is embodiment 2, to set up a starting capacitance C1 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 1, one end of described starting capacitance C1 is connected with the T1 utmost point of bidirectional triode thyristor T, and the other end of starting capacitance C1 and 1 end of current transformer L1 primary coil and 3 ends of secondary coil are connected to the A end of AC power jointly.Described starting capacitance C1 connects and enters operating state or disconnect to close its function for stand-by motor starter circuit.
Refer to Fig. 3, Fig. 3 is embodiment 3, to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 2,1 end of 1 end of described inductance L 2 and current transformer L1 primary coil is connected to the A end of AC power jointly, and 2 ends of inductance L 2 are connected with 3 ends of the other end of starting capacitance C1 and current transformer L1 secondary coil.Inductance L 2 is conventional element, and its 1,2 ends are one end and the other end of inductance L 2.Described inductance L 2 is connected and is entered operating state or disconnect to close its function for stand-by motor starter circuit equally.
Refer to Fig. 4, Fig. 4 is embodiment 4, be to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 2 equally, 1 end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, and 2 ends of inductance L 2 are connected with motor auxiliary winding exit S.
Refer to Fig. 5, Fig. 5 is embodiment 5, to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 2 equally, 1 end of 1 end of described inductance L 2 and current transformer L1 primary coil and 3 ends of secondary coil are connected to the A end of AC power jointly, and 2 ends of inductance L 2 are connected with the other end of starting capacitance C1.
Refer to Fig. 6, Fig. 6 is embodiment 6, be to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 2 equally, 1 end of described inductance L 2 connects one end of starting capacitance C1, and 2 ends of inductance L 2 are connected with the T1 utmost point of bidirectional triode thyristor T.
Refer to Fig. 7, Fig. 7 is embodiment 7, to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 1,1 end of 1 end of described inductance L 2 and current transformer L1 primary coil is connected to the A end of AC power jointly, and 2 ends of inductance L 2 are connected with 3 ends of the T1 utmost point of bidirectional triode thyristor T and current transformer L1 secondary coil.
Refer to Fig. 8, Fig. 8 is embodiment 8, be to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 1 equally, 1 end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, and 2 ends of inductance L 2 are connected with motor auxiliary winding exit S.
Refer to Fig. 9, Fig. 9 is embodiment 9, to set up an inductance L 2 in the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in embodiment 1 equally, 1 end of 1 end of described inductance L 2 and current transformer L1 primary coil and 3 ends of secondary coil are connected to the A end of AC power jointly, and 2 ends of inductance L 2 are connected with the T1 utmost point of bidirectional triode thyristor T.
Refer to Figure 10～18, Figure 10～18 are respectively embodiment 10～18, are the current-limiting resistance R that connects between 4 ends of the G utmost point summation current transformer L1 secondary coil to the bidirectional triode thyristor T described in embodiment 1～9.By selecting the parameter of suitable current transformer L1 and the resistance of current-limiting resistance R, can be at the beginning of motor starts starting, rotor is not yet when high speed rotating, make the larger secondary induction electric current producing in current transformer L1 secondary coil can trigger bidirectional triode thyristor T conducting, and the normal operating conditions electric current of motor cannot trigger bidirectional triode thyristor T conducting.
In the various embodiments described above, it is not identical that different motors and the curent change situation at current transformer L1 primary coil serial connection place respectively have, also different with the phase relation of electric current in motor starting circuit.By selecting above various execution mode, can make the acquisition of current transformer L1 secondary coil and the current phase in motor starter circuit be related to the trigger current of the best, make trigger current obtain the required optimal varied situation of actuating motor, for triggering the bidirectional triode thyristor T that is serially connected in motor starter circuit simultaneously.
Claims (10)
1. a commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter, described commercial refrigeration compressor electric motor has the stator being made up of at least one main winding and auxiliary winding, between main winding exit M and auxiliary winding exit S, be connected with permanent operation capacitor C2, main, auxiliary winding merges the B end that exit L connects AC power, it is characterized in that: described mutual-inductance contactless electric current starter comprises the current transformer L1 and the bidirectional triode thyristor T that possess a primary coil and a secondary coil, described one end of current transformer L1 primary coil and the T1 of one end of secondary coil and bidirectional triode thyristor T are connected to the A end of AC power extremely jointly, the other end of current transformer L1 primary coil is connected with motor main winding exit M, the other end of current transformer L1 secondary coil is connected with the G utmost point of bidirectional triode thyristor T, the T2 utmost point of bidirectional triode thyristor T is connected with motor auxiliary winding exit S.
2. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 1, characterized by further comprising starting capacitance C1, one end of described starting capacitance C1 is connected with the T1 utmost point of bidirectional triode thyristor T, and the other end of starting capacitance C1 and one end of current transformer L1 primary coil and one end of secondary coil are connected to the A end of AC power jointly.
3. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 2, characterized by further comprising inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil is connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the other end of starting capacitance C1 and one end of current transformer L1 secondary coil.
4. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 2, characterized by further comprising inductance L 2, one end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, and the other end of inductance L 2 is connected with motor auxiliary winding exit S.
5. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 2, characterized by further comprising inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil and one end of secondary coil are connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the other end of starting capacitance C1.
6. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 2, characterized by further comprising inductance L 2, one end of described inductance L 2 connects one end of starting capacitance C1, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T.
7. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 1, characterized by further comprising inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil is connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T and one end of current transformer L1 secondary coil.
8. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 1, characterized by further comprising inductance L 2, one end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, and the other end of inductance L 2 is connected with motor auxiliary winding exit S.
9. commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter according to claim 1, characterized by further comprising inductance L 2, one end of one end of described inductance L 2 and current transformer L1 primary coil and one end of secondary coil are connected to the A end of AC power jointly, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T.
10. according to the commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter described in any one in claim 1～9, characterized by further comprising current-limiting resistance R, one end of described current-limiting resistance R is connected with the other end of current transformer L1 secondary coil, and the other end of current-limiting resistance R connects the G utmost point of described bidirectional triode thyristor T.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385605.2U CN203984278U (en) | 2014-07-11 | 2014-07-11 | Commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter |
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| CN201420385605.2U CN203984278U (en) | 2014-07-11 | 2014-07-11 | Commercial refrigeration compressor electric motor mutual-inductance contactless electric current starter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113235A (en) * | 2014-07-11 | 2014-10-22 | 常熟市天银机电股份有限公司 | Mutual-inductance non-contact current starter for commercial refrigeration compressor motor |
| CN104767426A (en) * | 2015-04-30 | 2015-07-08 | 章剑锋 | Electronic type zero power consumption low electromagnetic interference motor starter and motor |
-
2014
- 2014-07-11 CN CN201420385605.2U patent/CN203984278U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113235A (en) * | 2014-07-11 | 2014-10-22 | 常熟市天银机电股份有限公司 | Mutual-inductance non-contact current starter for commercial refrigeration compressor motor |
| WO2016004782A1 (en) * | 2014-07-11 | 2016-01-14 | 常熟市天银机电股份有限公司 | Mutual-inductance contactless current starter for commercial refrigeration compressor motor |
| CN104767426A (en) * | 2015-04-30 | 2015-07-08 | 章剑锋 | Electronic type zero power consumption low electromagnetic interference motor starter and motor |
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Granted publication date: 20141203 |