CN104579025A - Non-power-consumption starter of commercial refrigeration compressor motor - Google Patents
Non-power-consumption starter of commercial refrigeration compressor motor Download PDFInfo
- Publication number
- CN104579025A CN104579025A CN201510039159.9A CN201510039159A CN104579025A CN 104579025 A CN104579025 A CN 104579025A CN 201510039159 A CN201510039159 A CN 201510039159A CN 104579025 A CN104579025 A CN 104579025A
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- China
- Prior art keywords
- motor
- resistance
- current transformer
- triode thyristor
- bidirectional triode
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
- H02P1/44—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor by phase-splitting with a capacitor
Abstract
The invention discloses a non-power-consumption starter of a commercial refrigeration compressor motor, and belongs to the technical field of motor starters. The non-power-consumption starter comprises a current transformer L1, a bidirectional triode thyristor T, an inductor L2, a starting capacitor C1 and a PTC element. One end of a primary coil of the current transformer L1 and a pole T1 of the bidirectional triode thyristor T are together connected with one end of an alternating-current power source, one end of a secondary coil of the current transformer L1 is connected with a pole G of the bidirectional triode thyristor T, the other end of the primary coil of the current transformer L1 and the other end of the secondary coil of the current transformer L1 are together connected with the leading-out end M of a main winding of the motor, the inductor L2, the PTC element and the starting capacitor C1 are sequentially connected between a pole T2 of the bidirectional triode thyristor T and the leading-out end S of an auxiliary winding of the motor in series, and the combined leading-out end L of the main winding of the motor and the auxiliary winding of the motor is connected with the other end of the alternating-current power source. The non-power-consumption starter has the advantages that reactive power consumption can be effectively reduced, and requirements for energy saving and environmental friendliness can be met; the coil of the auxiliary winding can bear large current, and electrical performance is stable; generality is good, and safety is high.
Description
Technical field
The invention belongs to starting device of motor technical field, be specifically related to a kind of idle commercial refrigeration compressor motor 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
Current refrigeration compressor motor majority adopts load motor, and load motor is made up of rotor and stator usually, and described stator has major and minor two groups of windings, and described main winding is Working winding again, for realizing starting and the steady operation of motor; Described auxiliary winding is named again and starts winding, only in start-up period work, for the starting of stand-by motor.The start mode of load motor has resistance starting and capacitor start, though the starting torque of resistance starting formula motor is slightly larger than nominal torque, but still less, therefore also limit its scope of application; The starting torque of capacitor start formula motor is large, and can reach 2.5 ~ 3 times of nominal torque, can drive the machinery of full load starting, current refrigerant compressor mainly adopts capacitor start formula motor.Because compressor electric motor does not need auxiliary winding participation work after starting completes, and the power consumption major part of having started the electric current generation in rear auxiliary winding is ineffective power consumption, therefore, perfect condition is that auxiliary winding loop is disconnected after compressor electric motor starts, and the electric current flowing through auxiliary winding is reduced as much as possible, to reduce power loss, realize " zero-power ".To this, solution conventional is in the industry connected in series motor starter in the starting circuit of compressor.Motor starter is realized by semistor (hereinafter referred to as PTC thermistor) usually.When electric motor starting, the resistance of PTC thermistor is its normal temperature resistance, when auxiliary winding loop switches on power participation work, can produce larger auxiliary winding starting current in circuit.Under the effect of this electric current, PTC thermistor is heating up rapidly, and its resistance increases rapidly, finally makes auxiliary winding loop substantially disconnect.When motor normally runs, in PTC thermistor, still need one can maintain its small electric stream generated heat, for keeping the off-state in auxiliary winding loop.The power consumption produced in PTC thermistor by this electric current is about 3 watts, and this accumulation long, this heating power consumption can cause a large amount of wastes of electric energy.For the starting of the such as relatively high power compressor (power bracket: 50 ~ 400W) such as commercial compressor, then mainly rely on Weight type starter, Weight type starter is current mode device, and its pull-in winding is connected with compressor main winding, therefore needs to do strict mating with compressor.Although it is not Weight type starter reliability is high, perishable, and again can start within the short time (20 seconds, the best interval of heat engine) after starting failure, have that cost is high, contact endurance is limited, inhale when putting and easily produce the defect such as spark or electromagnetic interference.In addition, voltage-type starter is also usually used in the starting of high-power compressor, but same, and voltage-type starter, owing to have employed the relay of contact, also exists electric shock restricted lifetime, suction easily produces the defect such as spark or electromagnetic interference when putting.
The technical information about motor starter is no lack of in published Chinese patent literature, Chinese invention patent application publication No. CN101814874A describes " a kind of mutual inductance type non-contact starter ", it is by the current signal in current transformer sample motor loop, in conjunction with bidirectional triode thyristor and PTC thermistor, motor starting circuit is made only to participate in work when electric motor starting, and after motor enters normal operating conditions, disconnect closing its function, realize so-called " zero-power ".But this starter can only be applicable to general small-sized household refrigerant compressor, and cannot be applied to commercial high power refrigerant compressor, and therefore versatility is poor.And for example Chinese invention patent application publication No. CN104104278A " the mutual-inductance contactless current starter of commercial refrigeration compressor electric motor " mentioned, first by the current signal in current transformer sample motor loop, at the beginning of electric motor starting, the feature utilizing start loop electric current to be far longer than running current triggers bidirectional triode thyristor, complete the starting of motor, and after motor enters running status, utilize the feature that operating current declines to a great extent close to normal operating conditions electric current that bidirectional triode thyristor cannot be triggered, the disconnection completely in auxiliary winding loop is realized with this.This starter is mainly used in the starting of commercial refrigeration compressor electric motor, also can be used for the starting of common load motor, applied widely, but it is still found to have defect in actual applications: and auxiliary winding coil cannot bear larger resistance to electric current, thus have impact on the electric performance stablity of starter.
In view of above-mentioned prior art, in order to make motor starter have higher electric performance stablity, the structure of the applicant to existing commercial compressor motor starter makes a useful improvement, and technical scheme described below produces under this background.
Summary of the invention
Task of the present invention is to provide that a kind of starting reliability is high, electric performance stablity, consumed power are few, and can bear the idle commercial refrigeration compressor motor starter of big current.
In order to complete described task, technical scheme provided by the invention is: a kind of idle commercial refrigeration compressor motor starter, it is characterized in that: comprise current transformer L1, bidirectional triode thyristor T, inductance L 2, starting capacitance C1 and PTC element, described one end of current transformer L1 primary coil and the T1 of bidirectional triode thyristor T are connected one end of AC power extremely jointly, one end of current transformer L1 secondary coil connects the G pole of bidirectional triode thyristor T, the other end of current transformer L1 primary coil and the other end of secondary coil are connected motor main winding exit M jointly, described inductance L 2, PTC element and starting capacitance C1 are sequentially connected in series between the T2 pole of bidirectional triode thyristor T and motor auxiliary winding exit S, motor master, auxiliary winding merges the other end that exit L connects AC power.
In a specific embodiment of the present invention, described motor starter also comprises the first resistance R1, one end of the first described resistance R1 is connected with one end of described current transformer L1 secondary coil, the G pole of the bidirectional triode thyristor T described in other end connection of the first resistance R1.
In another specific embodiment of the present invention, described motor starter also comprises the second resistance R2, and the second described resistance R2 is connected in parallel on the two ends of described starting capacitance C1.
In another specific embodiment of the present invention, described motor starter also comprises the second resistance R2, and the second described resistance R2 is connected in parallel on the two ends of described starting capacitance C1.
In another specific embodiment of the present invention, described PTC element is made up of a PTC thermistor.
Also have in a specific embodiment of the present invention, described PTC element is made up of two PTC thermistor be connected in parallel.
More of the present invention and in a specific embodiment, described PTC element is formed by a PTC thermistor is in parallel with discharge resistance.
In an of the present invention and then specific embodiment, described PTC element is formed by two PTC thermistor are in parallel with discharge resistance three.
The present invention is by the current signal in current transformer L1 sample motor loop, according to motor from the change of starting to electric current normal course of operation, bidirectional triode thyristor T is utilized to realize being switched on or switched off of motor auxiliary winding loop, electric current after auxiliary winding loop disconnects is zero, to solve in prior art auxiliary winding coil and PTC thermistor after motor normal starting and produce the problem maintaining power consumption because still having small area analysis to pass through, effectively can reduce the consumption of reactance capacity, meet energy saving standard requirement; Described PTC element is used for current limliting and shock resistance, enables auxiliary winding coil bear larger resistance to electric current, thus improves the electric performance stablity of starter; In addition, PTC element also remains with former PTC thermistor and starts reliable, the easy advantage of coupling, expands the versatility of motor starter, improves the fail safe of electric motor starting.
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of the first embodiment of the present invention.
Fig. 2 is the electrical schematic diagram of the second embodiment of the present invention.
Fig. 3 is the electrical schematic diagram of the third embodiment of the present invention.
Fig. 4 is the electrical schematic diagram of the fourth embodiment of the present invention.
Embodiment
Technical spirit of the present invention and beneficial effect can be fully understood in order to make the public; applicant will describe in detail the specific embodiment of the present invention below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the present invention's design all should be considered as protection scope of the present invention.
Embodiment 1:
Refer to Fig. 1, a kind of idle commercial refrigeration compressor motor starter, described compressor electric motor has the stator be made up of at least one main winding and an auxiliary winding, and motor main winding exit is set to M, motor auxiliary winding exit is set to S, and motor main winding and auxiliary winding merges exit and is set to L; The two external links of the external ac power source AC that compressor electric motor is corresponding are set to side a and b respectively, and side a and b can exchange.Described motor starter comprises current transformer L1, bidirectional triode thyristor T, inductance L 2, starting capacitance C1 and PTC element, and described current transformer L1, bidirectional triode thyristor T, inductance L 2 and starting capacitance C1 are customary components.Described PTC element is PTC thermistor, specifically can be made up of a PTC thermistor or two PTC thermistor be connected in parallel; Also can be in parallel with discharge resistance or form by two PTC thermistor are in parallel with discharge resistance three by a PTC thermistor.The other end of 1,2,3,4 ends of current transformer L1 respectively one end of corresponding primary coil, the other end of primary coil, one end of secondary coil and secondary coil in figure; T1, T2 very two main electrodes of bidirectional triode thyristor T, G very controls pole.The A that 1 end of described current transformer L1 is connected AC power extremely jointly with the T1 of bidirectional triode thyristor T holds, and 3 ends of current transformer L1 connect the G pole of bidirectional triode thyristor T, and 2 ends and 4 ends of current transformer L1 are connected motor main winding exit M jointly.Described inductance L 2, PTC element and starting capacitance C1 are connected in series between the T2 pole of bidirectional triode thyristor T and motor auxiliary winding exit S, inductance L 2, PTC element and the position of starting capacitance C1 in this series arm unrestricted, in the present embodiment, inductance L 2, PTC element and starting capacitance C1 adopt following manner to be connected in series between the T2 pole of described bidirectional triode thyristor T and motor auxiliary winding exit S, the i.e. T2 pole of the bidirectional triode thyristor T described in the connection of one end of inductance L 2, the other end of inductance L 2 connects one end of PTC element, the other end of PTC element connects one end of starting capacitance C1, the other end of starting capacitance C1 connects motor auxiliary winding exit S.Motor main winding and auxiliary winding merges the B end that exit L connects AC power, and motor is connected with permanent operation capacitor C2 between main winding exit M and auxiliary winding exit S.
Please continue to refer to Fig. 1, the operation principle of the present embodiment is described.At the beginning of motor starts to start, in PTC element, the resistance of PTC thermistor is its normal temperature resistance, due to rotor not yet high speed rotating, can produce a larger starting current in motor main winding loop.Current transformer L1 is serially connected in the main winding loop of motor due to primary coil, therefore can produce the larger secondary induction electric current that corresponds to motor starting currents in primary coil in secondary coil.By selecting the parameter of suitable current transformer L1, this induced current can be made to trigger bidirectional triode thyristor T conducting to connect motor auxiliary winding loop.By selecting the parameter of suitable starting capacitance C1 and inductance L 2, the electric current in motor auxiliary winding loop and main winding loop can be made to there is certain phase difference, motor forms rotating magnetic field and starts to start in inside, rotor speed rises rapidly thereupon.After motor enters running status, the operating current of electric motor loop declines to a great extent close to normal operating conditions electric current, finally cannot trigger bidirectional triode thyristor T conducting, thus motor starter is disconnected completely.Because now motor is in normal operating condition, therefore bidirectional triode thyristor T can not be triggered by the induced current in current transformer L1 secondary coil, remain off state always incited somebody to action by motor starter, until motor stalls, so just reach motor starter and only participate in work when electric motor starting, and after motor enters normal operating conditions, disconnect the object of closing its function.The electric current vanishing upon opening of motor auxiliary winding loop, auxiliary winding coil and PTC thermistor after motor normal starting to be eliminated in prior art thus and produces the problem maintaining power consumption because still having small area analysis to pass through, thus effectively reduce the consumption of useless power, empirical tests, this power consumption lowly can reach milliwatt level usually, namely achieve usually said " zero-power " motor starter, drastically increase energy-saving efficiency.The effect of described PTC element is current limliting and shock resistance, and make auxiliary winding coil can bear larger resistance to electric current, electric performance stablity is good; Herein, PTC element also retains former PTC thermistor and starts reliable, the easy advantage of coupling, thus expands the versatility of starter, improves the fail safe of electric motor starting.
Embodiment 2:
Refer to Fig. 2, in the motor starter described in embodiment 1, set up a first resistance R1.One end of the first described resistance R1 is connected with 3 ends of described current transformer L1, the G pole of the bidirectional triode thyristor T described in other end connection of the first resistance R1.By selecting the parameter of suitable current transformer L1 and the first resistance R1, the induced current in current transformer L1 secondary coil can be made to be enough to trigger bidirectional triode thyristor T.The first described resistance R1 is current-limiting resistance.
Embodiment 3:
Refer to Fig. 3, set up a second resistance R2 in the motor starter described in embodiment 2, the second described resistance R2 is connected in parallel on the two ends of described starting capacitance C1.Second resistance R2 is discharge resistance, for shunting the electric current flow through in starting capacitance C1, plays jamproof effect simultaneously.
Embodiment 4:
Refer to Fig. 4, set up a second resistance R2 in the motor starter described in embodiment 1, the second described resistance R2 is connected in parallel on the two ends of described starting capacitance C1.Second resistance R2 is discharge resistance, for shunting the electric current flow through in starting capacitance C1, plays jamproof effect simultaneously.
Claims (8)
1.
a kind of idle commercial refrigeration compressor motor starter, it is characterized in that: comprise current transformer L1, bidirectional triode thyristor T, inductance L 2, starting capacitance C1 and PTC element, described one end of current transformer L1 primary coil and the T1 of bidirectional triode thyristor T are connected one end of AC power extremely jointly, one end of current transformer L1 secondary coil connects the G pole of bidirectional triode thyristor T, the other end of current transformer L1 primary coil and the other end of secondary coil are connected motor main winding exit M jointly, described inductance L 2, PTC element and starting capacitance C1 are sequentially connected in series between the T2 pole of bidirectional triode thyristor T and motor auxiliary winding exit S, motor master, auxiliary winding merges the other end that exit L connects AC power.
2.
idle commercial refrigeration compressor motor starter according to claim 1, it is characterized in that described motor starter also comprises the first resistance R1, one end of the first described resistance R1 is connected with one end of described current transformer L1 secondary coil, the G pole of the bidirectional triode thyristor T described in other end connection of the first resistance R1.
3.
idle commercial refrigeration compressor motor starter according to claim 2, is characterized in that described motor starter also comprises the second resistance R2, and the second described resistance R2 is connected in parallel on the two ends of described starting capacitance C1.
4.
idle commercial refrigeration compressor motor starter according to claim 1, is characterized in that described motor starter also comprises the second resistance R2, and the second described resistance R2 is connected in parallel on the two ends of described starting capacitance C1.
5.
idle commercial refrigeration compressor motor starter according to any one of Claims 1 to 4, is characterized in that described PTC element is made up of a PTC thermistor.
6.
idle commercial refrigeration compressor motor starter according to any one of Claims 1 to 4, is characterized in that described PTC element is made up of two PTC thermistor be connected in parallel.
7.
idle commercial refrigeration compressor motor starter according to any one of Claims 1 to 4, is characterized in that described PTC element is formed by a PTC thermistor is in parallel with discharge resistance.
8.
idle commercial refrigeration compressor motor starter according to any one of Claims 1 to 4, is characterized in that described PTC element is formed by two PTC thermistor are in parallel with discharge resistance three.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039159.9A CN104579025A (en) | 2015-01-27 | 2015-01-27 | Non-power-consumption starter of commercial refrigeration compressor motor |
| PCT/CN2015/082592 WO2016119390A1 (en) | 2015-01-27 | 2015-06-29 | Non-power consuming commercial refrigeration compressor motor starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039159.9A CN104579025A (en) | 2015-01-27 | 2015-01-27 | Non-power-consumption starter of commercial refrigeration compressor motor |
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| Publication Number | Publication Date |
|---|---|
| CN104579025A true CN104579025A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510039159.9A Pending CN104579025A (en) | 2015-01-27 | 2015-01-27 | Non-power-consumption starter of commercial refrigeration compressor motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104579025A (en) |
| WO (1) | WO2016119390A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119390A1 (en) * | 2015-01-27 | 2016-08-04 | 常熟市天银机电股份有限公司 | Non-power consuming commercial refrigeration compressor motor starter |
| CN111130396A (en) * | 2020-01-15 | 2020-05-08 | 上海路虹电子科技有限公司 | Electronic starter for motor and starting method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390594B (en) * | 2018-05-28 | 2024-03-12 | 黄石东贝压缩机有限公司 | Starter circuit |
| CN108429407A (en) * | 2018-05-28 | 2018-08-21 | 黄石东贝电器股份有限公司 | A kind of tap electric machine assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005341750A (en) * | 2004-05-28 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Motor starting device |
| CN200959581Y (en) * | 2006-09-21 | 2007-10-10 | 蔡宗法 | Electronic starting circuit of single-phase asynchronous motor |
| CN101814874A (en) * | 2010-04-23 | 2010-08-25 | 常熟市天银机电有限公司 | Mutual-induction type contactless starter |
| CN104104278A (en) * | 2014-07-11 | 2014-10-15 | 常熟市天银机电股份有限公司 | Mutual inductance type non-contact current starter used for commercial refrigeration compressor motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579025A (en) * | 2015-01-27 | 2015-04-29 | 常熟市天银机电股份有限公司 | Non-power-consumption starter of commercial refrigeration compressor motor |
| CN204349844U (en) * | 2015-01-27 | 2015-05-20 | 常熟市天银机电股份有限公司 | Idle commercial refrigeration compressor motor starter |
-
2015
- 2015-01-27 CN CN201510039159.9A patent/CN104579025A/en active Pending
- 2015-06-29 WO PCT/CN2015/082592 patent/WO2016119390A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005341750A (en) * | 2004-05-28 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Motor starting device |
| CN200959581Y (en) * | 2006-09-21 | 2007-10-10 | 蔡宗法 | Electronic starting circuit of single-phase asynchronous motor |
| CN101814874A (en) * | 2010-04-23 | 2010-08-25 | 常熟市天银机电有限公司 | Mutual-induction type contactless starter |
| CN104104278A (en) * | 2014-07-11 | 2014-10-15 | 常熟市天银机电股份有限公司 | Mutual inductance type non-contact current starter used for commercial refrigeration compressor motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119390A1 (en) * | 2015-01-27 | 2016-08-04 | 常熟市天银机电股份有限公司 | Non-power consuming commercial refrigeration compressor motor starter |
| CN111130396A (en) * | 2020-01-15 | 2020-05-08 | 上海路虹电子科技有限公司 | Electronic starter for motor and starting method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016119390A1 (en) | 2016-08-04 |
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