CN203984279U - Mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor - Google Patents
Mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor Download PDFInfo
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- CN203984279U CN203984279U CN201420385603.3U CN201420385603U CN203984279U CN 203984279 U CN203984279 U CN 203984279U CN 201420385603 U CN201420385603 U CN 201420385603U CN 203984279 U CN203984279 U CN 203984279U
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Abstract
A mutual-inductance contactless electric current starter for commercial refrigeration compressor electric motor, belongs to starting device of motor technical field.Comprise the current transformer L1 that possesses a primary coil and a secondary coil, bidirectional triode thyristor T and starting capacitance C1, 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 one end of starting capacitance C1, the other end of starting capacitance C1 is connected with motor auxiliary winding exit S, motor master, auxiliary winding merges the B end that exit L connects AC power.Advantage: energy-saving efficiency is high, circuit structure is simple, and versatility is good, can bear large electric current, and electric motor starting is reliable and safe.
Description
Technical field
The utility model belongs to starting device of motor technical field, be specifically related to mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor, 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 consists 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.Difference due to project organization, auxiliary winding is except playing the effect of electric motor starting, also can when 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 when 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, conventionally by semistor (PTC) element, is realized at present.When electric motor starting, the resistance of semistor is its normal temperature resistance, when 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.When 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, so this heating power consumption can cause a large amount of wastes of electric energy.For relatively high power compressor (power bracket: starting 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 be done 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 normality triggering, the bidirectional triode thyristor of regularly cut-off and corresponding triggering/timing cut-off circuit in motor starting circuit, realize motor starting circuit and from energising, be switched to the conversion regularly disconnecting, 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 a plurality of milliamperes is by a plurality of 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, in timer timing capacitor, through a period of time, substantially complete after electric discharge, 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, according to this comparative result, control the break-make of the bidirectional triode thyristor sealing in motor starting circuit, with this, reach the 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 when electric motor starting, with this, complete the starting of motor.And the utility model is not used 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 mutual-inductance contactless electric current starter for commercial refrigeration compressor electric motor of large electric current.
In order to complete described task, technical scheme provided by the utility model is: mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor, described commercial refrigeration compressor electric motor has the stator consisting of at least one main winding and auxiliary winding, 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 that possesses a primary coil and a secondary coil, bidirectional triode thyristor T and starting capacitance C1, 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 one end of starting capacitance C1, the other end of starting capacitance C1 is connected with motor auxiliary winding exit S.
In a specific embodiment of the present utility model, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, 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 another specific embodiment of the present utility model, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, 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 another specific embodiment of the present utility model, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, one end of described inductance L 2 is connected with the other end of starting capacitance C1, 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 a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, 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 one end of starting capacitance C1.
In order to complete described task, technical scheme provided by the utility model is: mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor, described commercial refrigeration compressor electric motor has the stator consisting of at least one main winding and auxiliary winding, 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 that possesses a primary coil and a secondary coil, bidirectional triode thyristor T and starting capacitance C1, one end of one end of described starting capacitance C1 and current transformer L1 primary coil is connected to the A end of AC power jointly, the other end of starting capacitance C1 is connected with the T1 utmost point of bidirectional triode thyristor T and one end of current transformer L1 secondary 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.
Of the present utility model, also have in a specific embodiment, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, 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.
More of the present utility model and in a specific embodiment, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, one end of described inductance L 2 is connected with one end of the other end of starting capacitance C1 and current transformer L1 secondary coil, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T.
In of the present utility model and then a specific embodiment, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, one end of described inductance L 2 is connected with the other 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 and one end of current transformer L1 secondary coil.
Of the present utility model again more and in a specific embodiment, described a kind of commercial refrigeration compressor electric motor also comprises inductance L 2 with mutual-inductance contactless electric current starter, 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 one end of starting capacitance C1.
In again of the present utility model and then a specific embodiment, described a kind of commercial refrigeration compressor electric motor also comprises current-limiting resistance R with mutual-inductance contactless electric current starter, 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, when guaranteeing the reliable starting of motor, and the fail safe that has improved electric motor starting.
Accompanying drawing explanation
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.
Figure 19 is the electrical schematic diagram of the 19th kind of embodiment of the present utility model.
Figure 20 is the electrical schematic diagram of the 20th kind of embodiment of the present utility model.
In figure: C1. starting capacitance; 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 according to the utility model design, changes in the form rather than substance all and should be considered as protection range of the present utility model.
Refer to Fig. 1, Fig. 1 is embodiment 1.Mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor, described commercial refrigeration compressor electric motor has the stator consisting 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, and 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 that possesses a primary coil and a secondary coil, bidirectional triode thyristor T and starting capacitance C1, 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, the T2 utmost point of bidirectional triode thyristor T is connected with one end of starting capacitance C1, the other end of starting capacitance C1 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 rotor high speed rotating not yet, 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 when flowing through the alternating current of circuit and reach zero point, motor starter circuit disconnects substantially, and motor enters normal operating condition.At motor, enter after running status, 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 when 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.Described starting capacitance C1 connects and enters operating state or disconnect to close its function for stand-by motor starter circuit.
Refer to Fig. 2, Fig. 2 is embodiment 2, with setting up an inductance L 2 in mutual-inductance contactless electric current starter at the commercial refrigeration compressor electric motor 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.Inductance L 2 is conventional element, and its 1,2 ends are one end and the other end of inductance L 2.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. 3, Fig. 3 is embodiment 3, with setting up an inductance L 2 in mutual-inductance contactless electric current starter equally at the commercial refrigeration compressor electric motor described in embodiment 1,1 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 Fig. 4, Fig. 4 is embodiment 4, be equally at the commercial refrigeration compressor electric motor described in embodiment 1 with setting up an inductance L 2 in mutual-inductance contactless electric current starter, 1 end of described inductance L 2 is connected with the other end of starting capacitance C1,2 ends of inductance L 2 are connected with motor auxiliary winding exit S.
Refer to Fig. 5, Fig. 5 is embodiment 5, be equally at the commercial refrigeration compressor electric motor described in embodiment 1 with setting up an inductance L 2 in mutual-inductance contactless electric current starter, 1 end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, 2 ends of inductance L 2 are connected with one end of starting capacitance C1.
Refer to Fig. 6, Fig. 6 is embodiment 6.Described commercial refrigeration compressor electric motor comprises the current transformer L1 that possesses a primary coil and a secondary coil with mutual-inductance contactless electric current starter, bidirectional triode thyristor T and starting capacitance C1, 1 end of one end of described starting capacitance C1 and current transformer L1 primary coil is connected to the A end of AC power jointly, the other end of starting capacitance C1 is connected with the T1 utmost point of bidirectional triode thyristor T and 3 ends of current transformer L1 secondary coil, 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, the T2 utmost point of bidirectional triode thyristor T is connected with motor auxiliary winding exit S.
Refer to Fig. 7, Fig. 7 is embodiment 7, be at the commercial refrigeration compressor electric motor described in embodiment 6 with setting up an inductance L 2 in mutual-inductance contactless electric current starter, 1 end of described inductance L 2 is connected with the T2 utmost point of bidirectional triode thyristor T, 2 ends of inductance L 2 are connected with motor auxiliary winding exit S.
Refer to Fig. 8, Fig. 8 is embodiment 8, with setting up an inductance L 2 in mutual-inductance contactless electric current starter equally at the commercial refrigeration compressor electric motor described in embodiment 6,1 end of described inductance L 2 is connected with 3 ends of the other end of starting capacitance C1 and current transformer L1 secondary coil, and 2 ends of inductance L 2 are connected with the T1 utmost point of bidirectional triode thyristor T.
Refer to Fig. 9, Fig. 9 is embodiment 9, with setting up an inductance L 2 in mutual-inductance contactless electric current starter equally at the commercial refrigeration compressor electric motor described in embodiment 6,1 end of described inductance L 2 is connected with the other end of starting capacitance C1, 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 Figure 10, Figure 10 is embodiment 10, with setting up an inductance L 2 in mutual-inductance contactless electric current starter equally at the commercial refrigeration compressor electric motor described in embodiment 6,1 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 one end of starting capacitance C1.
Refer to Figure 11～20, Figure 11～20 are respectively embodiment 11～20, are to the current-limiting resistance R that connects between 4 ends of the G utmost point summation current transformer L1 secondary coil of the bidirectional triode thyristor T described in embodiment 1～10.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 during 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 (11)
1. mutual-inductance contactless electric current starter for a commercial refrigeration compressor electric motor, described commercial refrigeration compressor electric motor has the stator consisting of at least one main winding and auxiliary winding, 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 that possesses a primary coil and a secondary coil, bidirectional triode thyristor T and starting capacitance C1, 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 one end of starting capacitance C1, the other end of starting capacitance C1 is connected with motor auxiliary winding exit S.
2. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor 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.
3. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor 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.
4. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor according to claim 1, characterized by further comprising inductance L 2, one end of described inductance L 2 is connected with the other end of starting capacitance C1, and the other end of inductance L 2 is connected with motor auxiliary winding exit S.
5. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor 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 one end of starting capacitance C1.
6. mutual-inductance contactless electric current starter for a commercial refrigeration compressor electric motor, described commercial refrigeration compressor electric motor has the stator consisting of at least one main winding and auxiliary winding, 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 that possesses a primary coil and a secondary coil, bidirectional triode thyristor T and starting capacitance C1, one end of one end of described starting capacitance C1 and current transformer L1 primary coil is connected to the A end of AC power jointly, the other end of starting capacitance C1 is connected with the T1 utmost point of bidirectional triode thyristor T and one end of current transformer L1 secondary 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.
7. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor according to claim 6, 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.
8. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor according to claim 6, characterized by further comprising inductance L 2, one end of described inductance L 2 is connected with one end of the other end of starting capacitance C1 and current transformer L1 secondary coil, and the other end of inductance L 2 is connected with the T1 utmost point of bidirectional triode thyristor T.
9. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor according to claim 6, characterized by further comprising inductance L 2, one end of described inductance L 2 is connected with the other 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 and one end of current transformer L1 secondary coil.
10. mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor according to claim 6, 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 one end of starting capacitance C1.
11. according to mutual-inductance contactless electric current starter for a kind of commercial refrigeration compressor electric motor described in any one in claim 1～10, 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113237A (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 |
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2014
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113237A (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 |
| WO2016004787A1 (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 |
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