WO2016004786A1 - Démarreur à courant sans contact à inductance mutuelle pour moteur de compresseur frigorifique commercial - Google Patents

Démarreur à courant sans contact à inductance mutuelle pour moteur de compresseur frigorifique commercial Download PDF

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Publication number
WO2016004786A1
WO2016004786A1 PCT/CN2015/077628 CN2015077628W WO2016004786A1 WO 2016004786 A1 WO2016004786 A1 WO 2016004786A1 CN 2015077628 W CN2015077628 W CN 2015077628W WO 2016004786 A1 WO2016004786 A1 WO 2016004786A1
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Prior art keywords
motor
current
inductor
current transformer
starter
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PCT/CN2015/077628
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English (en)
Chinese (zh)
Inventor
赵云文
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常熟市天银机电股份有限公司
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Publication of WO2016004786A1 publication Critical patent/WO2016004786A1/fr

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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
    • 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

Definitions

  • the invention belongs to the technical field of motor starting devices, and particularly relates to a motor-driven non-contact current starter for a commercial refrigeration compressor, which is mainly used for starting a commercial refrigeration compressor motor, and can also be used for ordinary single-phase AC induction or single phase.
  • Starting of an AC permanent magnet motor hereinafter collectively referred to as a single phase AC motor.
  • a single-phase AC motor is generally composed of a rotor having a main shaft and a pair of windings, and the stator has a pair of windings, and only when the two stator windings cooperate with each other, a starting torque is generated to start the motor. Due to the difference in design structure, the secondary winding can not only participate in the motor starting, but also continue to participate in the normal operation of the motor. Therefore, the secondary winding circuit of the complete single-phase AC motor can usually be operated by the parallel secondary winding circuit and The secondary winding start circuit is indicated.
  • the secondary winding starting circuit only participates in the work when the motor starts, and when the motor completes the starting, the secondary winding starting circuit is required. Disconnect to turn off its function, causing the motor to switch to normal operation for disconnection.
  • the function of the motor starter is to turn on the secondary winding starting circuit when the motor starts and keep it for a certain time, and disconnect the secondary winding starting circuit after the motor completes the starting process.
  • PTC positive temperature coefficient thermistor
  • the heavy hammer starter is a current type device, and its suction coil is connected in series with the compressor running winding, so it needs to The compressor is strictly matched.
  • the hammer starter is highly reliable, not easy to break, and fails to start (the plug is not plugged in, the system does not form a high and low voltage within a few seconds), it can be restarted in a short time (the best interval of the hot machine is 20 seconds).
  • there are defects such as high cost, limited contact life, and easy sparking or electromagnetic interference during suction and discharge.
  • the Chinese invention patent grant announcement number CN1024157C introduces an "electronic circuit for starting a single-phase induction motor" by using one in the motor starting circuit. Normal trigger, timed off bidirectional thyristor and corresponding trigger/timing cutoff circuit The motor starting circuit is now switched from energized on to timed off, thereby completing the starting of the motor.
  • the number of discrete components used in the circuit will greatly reduce the reliability of the motor starting; especially in the motor operating state, multiple milliamps of operating current through the trigger circuit
  • the resistive element in the circuit and the plurality of transistors in the timing cut-off circuit, and the electronic circuit operates in a complicated motor working circuit, and is not effectively isolated from the complicated power environment, so the entire fragile weak current circuit system is not well protected , will have a huge negative impact on the reliability of the motor system; in addition, the two-way thyristor used in the circuit must be reset before the motor starting circuit is turned on, that is, the timer circuit must be de-energized.
  • 10-94279 utilizes the principle that the current of the motor is different under starting and running conditions, and uses the current detecting resistor placed in the total circuit of the motor to convert the main circuit current (motor total current) signal into a voltage signal, and the patent
  • the main circuit current signal and the set current value are compared, and the bidirectional thyristor connected in the motor starting circuit is controlled according to the comparison result. Break, in order to achieve the purpose of controlling the start-up circuit on and off.
  • the circuit uses a resistor to sample the current signal in the total circuit of the motor into a voltage signal.
  • the resistance is a purely resistive component, and the current of the total circuit of the motor is usually at the amperage level or close to the amperage level, the operation of the entire motor is performed.
  • the resistor consumes watt-level or near-watt-level unwanted heating power, making the circuit greatly reduce energy utilization when the motor can be started; in addition, the "reference current value setter” and the “comparison loop” "Auxiliary circuits reduce the reliability of the motor starting function to a certain extent.
  • the Chinese Invention Patent Authorization No. CN1294694C and the Chinese Invention Patent Grant No. CN1283037C recommend two kinds of "mutual-inductive non-contact starters", which are applicable to various types of single-phase AC motors.
  • the above two types of mutual inductance type non-contact starters are characterized by using current transformers, according to different single-phase AC motors, sampling and converting currents at different positions of the motor circuit for triggering serial connection in the motor secondary winding starting circuit Two-way thyristor. They make use of the characteristics that the loop current of the motor at the beginning of the start is much larger than the normal working current.
  • the secondary winding thyristor is triggered and turned on for a short time, thereby completing the starting of the motor.
  • the present invention does not use a PTC component, and uses a current transformer and a triac different from the combination of the Chinese invention patent authorization notice number CN1294694C and the Chinese invention patent authorization announcement number CN1283037C, and supplements the inductor and capacitor to realize commercial refrigeration compression.
  • Machine motor contactless current starter uses a current transformer and a triac different from the combination of the Chinese invention patent authorization notice number CN1294694C and the Chinese invention patent authorization announcement number CN1283037C, and supplements the inductor and capacitor to realize commercial refrigeration compression. Machine motor contactless current starter.
  • the task of the present invention is to provide a commercial non-contact current starter for a commercial refrigeration compressor motor with high starting reliability, good stability, high safety, low power consumption, good versatility, and high current.
  • the technical solution provided by the present invention is: a commercial refrigeration compressor motor mutual inductance type contactless current starter, wherein the commercial refrigeration compressor motor has at least one main winding and a secondary winding.
  • the stator, the main winding and the auxiliary winding L are connected to the B end of the AC power source
  • the mutual inductance type non-contact current starter comprises a current transformer L1 having a primary coil and a primary coil and a bidirectional Control silicon T, one end of the primary coil of the current transformer L1 is connected with one end of the secondary coil and the T1 pole of the triac T to the A end of the AC power source, and the other end of the primary coil of the current transformer L1 and the motor
  • the main winding terminal M is connected, and the other end of the secondary winding of the current transformer L1 is connected to the G pole of the triac T, and the T2 pole of the triac T is connected to the motor secondary winding terminal S.
  • the commercial mutual-compressor non-contact current starter of the commercial refrigeration compressor further includes a starting capacitor C1, and one end of the starting capacitor C1 and the bidirectional thyristor T The T1 pole is connected, and the other end of the starting capacitor C1 is connected to one end of the primary coil of the current transformer L1 and one end of the secondary coil to the A end of the AC power source.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further includes an inductor L2, one end of the inductor L2 and the primary coil of the current transformer L1. One end is commonly connected to the A terminal of the AC power source, and the other end of the inductor L2 is connected to the other end of the starting capacitor C1 and one end of the secondary coil of the current transformer L1.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further includes an inductor L2, one end of the inductor L2 and the T2 of the triac T The pole is connected, and the other end of the inductor L2 is connected to the motor secondary winding terminal S.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further includes an inductor L2, one end of the inductor L2 and the primary coil of the current transformer L1. One end and one end of the secondary coil are commonly connected to the A terminal of the AC power source, and the other end of the inductor L2 is connected to the other end of the starting capacitor C1.
  • the commercial refrigeration compressor motor has a mutual inductance and no touch.
  • the point current starter further includes an inductor L2, one end of the inductor L2 is connected to one end of the starting capacitor C1, and the other end of the inductor L2 is connected to the T1 pole of the triac T.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further comprises an inductor L2, one end of the inductor L2 and the primary coil of the current transformer L1 One end is connected in common to the A terminal of the AC power source, and the other end of the inductor L2 is connected to the T1 pole of the triac T and the one end of the secondary coil of the current transformer L1.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further includes an inductor L2, one end of the inductor L2 and the T2 of the triac T The pole is connected, and the other end of the inductor L2 is connected to the motor secondary winding terminal S.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further includes an inductor L2, and one end of the inductor L2 and the current transformer L1 primary One end of the coil and one end of the secondary coil are commonly connected to the A terminal of the AC power source, and the other end of the inductor L2 is connected to the T1 pole of the triac T.
  • the commercial refrigerant compressor motor mutual inductance type contactless current starter further includes a current limiting resistor R, and one end of the current limiting resistor R and the current mutual inductance The other end of the secondary winding of the L1 is connected, and the other end of the current limiting resistor R is connected to the G pole of the triac T.
  • the invention adopts the above structure, and has the beneficial effects compared with the prior art: by using the current transformer L1 to sample the current signal in the motor circuit, the power consumption in the current sampling process can be effectively controlled, thereby greatly improving Energy-saving efficiency;
  • the circuit structure is simple, the number of components is small, the versatility is good, and it can withstand large currents, and the safety of the motor starting is improved while ensuring reliable starting of the motor.
  • Fig. 1 is an electrical schematic diagram showing a first embodiment of the present invention.
  • Fig. 2 is an electrical schematic diagram showing a second embodiment of the present invention.
  • Fig. 3 is an electrical schematic diagram showing a third embodiment of the present invention.
  • Fig. 4 is an electrical schematic diagram showing a fourth embodiment of the present invention.
  • Fig. 5 is an electrical schematic diagram showing a fifth embodiment of the present invention.
  • Figure 6 is an electrical schematic diagram of a sixth embodiment of the present invention.
  • Figure 7 is an electrical schematic diagram of a seventh embodiment of the present invention.
  • Figure 8 is an electrical schematic diagram of an eighth embodiment of the present invention.
  • Figure 9 is an electrical schematic diagram of a ninth embodiment of the present invention.
  • Figure 10 is an electrical schematic diagram of a tenth embodiment of the present invention.
  • Figure 11 is an electrical schematic diagram of an eleventh embodiment of the present invention.
  • Figure 12 is an electrical schematic diagram of a twelfth embodiment of the present invention.
  • Figure 13 is an electrical schematic diagram of a thirteenth embodiment of the present invention.
  • Figure 14 is an electrical schematic diagram of a fourteenth embodiment of the present invention.
  • Figure 15 is an electrical schematic diagram of a fifteenth embodiment of the present invention.
  • Figure 16 is an electrical schematic diagram of a sixteenth embodiment of the present invention.
  • Figure 17 is an electrical schematic diagram of a seventeenth embodiment of the present invention.
  • Figure 18 is an electrical schematic diagram of an eighteenth embodiment of the present invention.
  • C Starting capacitor
  • L Current transformer, L2. Inductance
  • T Bidirectional thyristor
  • R Current limiting resistor
  • FIG. 1 is Embodiment 1.
  • a commercial refrigeration compressor motor mutual inductance type contactless current starter wherein the commercial refrigeration compressor motor has a stator composed of at least one main winding and a secondary winding, the main winding end of the motor is set to M, and the secondary winding of the motor is taken out
  • the end is set to S, the combined main and auxiliary winding ends of the motor are set to L; the external connection ends of the external AC power supply AC corresponding to the commercial refrigeration compressor motor are respectively set to the A end and the B end, and the A end and the B end are interchangeable.
  • the main and auxiliary windings are combined with the terminal L to connect to the B terminal of the AC power source.
  • the mutual inductance type contactless current starter comprises a current transformer L1 and a bidirectional thyristor T having a primary coil and a primary coil, and the current transformer L1 has one end of the primary coil and three of the secondary coil.
  • the T1 pole of the terminal and the triac T are commonly connected to the A end of the AC power source, and the 2 ends of the primary coil of the current transformer L1 are connected to the motor main winding terminal M, and the 4 ends of the secondary coil of the current transformer L1 and the bidirectional can be
  • the G pole of the control silicon T is connected, and the T2 pole of the triac T is connected to the motor secondary winding terminal S.
  • the current transformer L1 and the triac T are both conventional components, and the ends of the current transformer L1 are the one end and the other end of the primary coil, and the ends of the 3 and 4 are the ends of the secondary coil and the other end. One end.
  • FIG. 1 Please continue to refer to FIG. 1 to explain the working principle of this embodiment.
  • the current transformer L1 generates a large secondary induced current corresponding to the motor starting current in the primary coil in the secondary coil because the primary coil is connected in series in the main winding loop of the motor.
  • the induced current can trigger the triac T to conduct.
  • the motor starter circuit is turned on to enter the working state. At this point, the motor starts to start, and the rotor speed rises rapidly.
  • the motor starter circuit When the AC current flowing through the circuit reaches zero, the motor starter circuit is basically disconnected, and the motor enters the normal running state. After the motor enters the running state, the operating current of the motor circuit system also drops to a near normal working current, and the secondary induced current of the current transformer L1 also drops sharply, and finally the triac T conduction cannot be triggered.
  • the motor starter circuit When the motor starter circuit is completely disconnected. Since the motor is in normal operation at this time, the triac T can no longer be triggered by the output current of the secondary coil of the current transformer L1, and the motor starter circuit will remain in the current state until the motor stops rotating, thereby realizing the motor.
  • the starter circuit only works when the motor is started, and turns off when the motor enters normal operation to turn off its function.
  • the circuit uses the current transformer L1 to collect the current signal in the motor circuit, which can effectively control the power consumption during the current sampling process. It is verified that the power consumption can usually be as low as milliwatts, that is, the so-called “zero” is realized. Power consumption “commercial refrigeration compressor motor starter, which greatly improves energy efficiency.
  • FIG. 2 is a second embodiment of a commercial refrigeration compressor motor mutual inductance type contactless current starter according to Embodiment 1, and a dynamic capacitor C1 is added, and one end of the starting capacitor C1 is added. Connected to the T1 pole of the triac T, the other end of the starting capacitor C1 is connected to the 1 terminal of the primary coil of the current transformer L1 and the 3 terminal of the secondary coil to the A terminal of the AC power source.
  • the starting capacitor C1 is used to assist the motor starter circuit to be turned into an active state or turned off to turn off its function.
  • FIG. 3 is a third embodiment of the present invention, in which a inductor L2 is added to a motor-driven non-contact current starter of a commercial refrigeration compressor, and the first end of the inductor L2 is One end of the primary coil of the current transformer L1 is commonly connected to the A terminal of the AC power source, and the two ends of the inductor L2 are connected to the other end of the starting capacitor C1 and the three ends of the secondary coil of the current transformer L1.
  • the inductor L2 is a conventional component, and its ends 1 and 2 are the one end and the other end of the inductor L2.
  • the inductor L2 is also used to assist the motor starter circuit to be turned into an active state or turned off to turn off its function.
  • FIG. 4 is a fourth embodiment.
  • an inductor L2 is added, and the inductor L2 has one end. Connected to the T2 pole of the triac T, the two ends of the inductor L2 are connected to the motor secondary winding terminal S.
  • FIG. 5 is a fifth embodiment.
  • a inductor L2 is added to a commercial refrigeration compressor motor mutual-sensing non-contact current starter according to Embodiment 2, and one end of the inductor L2 is added.
  • One end of the primary coil of the current transformer L1 and the third end of the secondary coil are connected in common to the A terminal of the AC power source, and the two ends of the inductor L2 are connected to the other end of the starting capacitor C1.
  • FIG. 6 is a sixth embodiment.
  • a inductor L2 is added to the motor-coupled non-contact current starter of the commercial refrigeration compressor, and the first end of the inductor L2 is added.
  • One end of the starting capacitor C1 is connected, and the two ends of the inductor L2 are connected to the T1 pole of the triac T.
  • FIG. 7 is a seventh embodiment of an embodiment of the present invention, in which a inductor L2 is added to a motor-driven non-contact current starter of a commercial refrigeration compressor, and the first end of the inductor L2 is One end of the primary coil of the current transformer L1 is commonly connected to the A terminal of the AC power source, and the two ends of the inductor L2 are connected to the T1 pole of the triac T and the 3 terminals of the secondary coil of the current transformer L1.
  • FIG. 8 is the eighth embodiment.
  • a inductor L2 is added to the motor-sensing non-contact current starter of the commercial refrigeration compressor, and the first end of the inductor L2 is added.
  • the two ends of the inductor L2 are connected to the motor secondary winding terminal S.
  • FIG. 9 is a ninth embodiment.
  • an inductor L2 is added, and one end of the inductor L2 is provided.
  • One end of the primary coil of the current transformer L1 and the third end of the secondary coil are connected to the A terminal of the AC power source, and the two ends of the inductor L2 are connected to the T1 pole of the triac T.
  • FIGS. 10-18 are Embodiments 10-18, respectively, which are the G pole of the triac T and the four ends of the secondary coil of the current transformer L1 described in Embodiments 1-9.
  • a current limiting resistor R is connected in series.
  • the current changes of the different motors and the primary coils of the current transformer L1 are different, and the phase relationship of the currents in the motor starting circuit is also different.
  • the secondary coil of the current transformer L1 can obtain the trigger current with the best phase relationship with the current in the motor starter circuit, and at the same time, the trigger current can obtain the optimal change required for starting the motor. Used to trigger the triac T that is connected in series in the motor starter circuit.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

L'invention concerne un démarreur à courant sans contact à inductance mutuelle pour moteur de compresseur frigorifique commercial, qui comprend un transformateur de courant L1 et un dispositif au silicium commandable bidirectionnel T. Une borne (1) d'une bobine primaire du transformateur de courant L1, une borne (3) d'une bobine secondaire du transformateur de courant L1 et un pôle T1 du dispositif au silicium commandable bidirectionnel T sont connectés ensemble à une borne A d'une alimentation électrique en courant alternatif (AC). L'autre borne (2) de la bobine primaire du transformateur de courant L1 est connectée à une borne de sortie d'enroulement primaire M d'un moteur. L'autre borne (4) de la bobine secondaire du transformateur de courant L1 est connectée à un pôle G du dispositif au silicium commandable bidirectionnel T. Un pôle T2 du dispositif au silicium commandable bidirectionnel T est connecté à une borne de sortie d'enroulement secondaire S du moteur. Une borne de sortie de combinaison d'enroulements primaire et secondaire L du moteur est connectée à une borne B de l'alimentation en courant alternatif. Par utilisation du transformateur de courant L1 pour échantillonner le courant du moteur, la consommation d'énergie peut être efficacement régulée ; et le démarreur est économe en énergie et très efficace, possède une structure de circuit simple, un petit nombre de composants et une grande universalité, peut résister à un courant intense, et améliore la sécurité de démarrage du moteur tout en garantissant un démarrage fiable du moteur.
PCT/CN2015/077628 2014-07-11 2015-04-28 Démarreur à courant sans contact à inductance mutuelle pour moteur de compresseur frigorifique commercial WO2016004786A1 (fr)

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CN201410330943.0A CN104113236A (zh) 2014-07-11 2014-07-11 一种商用制冷压缩机电机互感式无触点电流起动器
CN201410330943.0 2014-07-11

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CN104113236A (zh) * 2014-07-11 2014-10-22 常熟市天银机电股份有限公司 一种商用制冷压缩机电机互感式无触点电流起动器

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CN201422093Y (zh) * 2009-04-27 2010-03-10 中山大洋电机股份有限公司 单相交流电机电子启动电路
CN101814875A (zh) * 2010-04-23 2010-08-25 常熟市天银机电有限公司 用于单相交流电机的互感式无触点起动器
CN104113236A (zh) * 2014-07-11 2014-10-22 常熟市天银机电股份有限公司 一种商用制冷压缩机电机互感式无触点电流起动器
CN204068776U (zh) * 2014-07-11 2014-12-31 常熟市天银机电股份有限公司 一种商用制冷压缩机电机互感式无触点电流起动器

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CN2744065Y (zh) * 2004-11-24 2005-11-30 常熟市天银机电有限公司 互感式无触点起动器
CN1283037C (zh) * 2005-01-21 2006-11-01 常熟市天银机电有限公司 互感式无触点起动器
CN200959581Y (zh) * 2006-09-21 2007-10-10 蔡宗法 单相异步电动机电子起动电路
CN201656866U (zh) * 2010-04-23 2010-11-24 常熟市天银机电有限公司 互感式无触点起动器
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Publication number Priority date Publication date Assignee Title
CN201422093Y (zh) * 2009-04-27 2010-03-10 中山大洋电机股份有限公司 单相交流电机电子启动电路
CN101814875A (zh) * 2010-04-23 2010-08-25 常熟市天银机电有限公司 用于单相交流电机的互感式无触点起动器
CN104113236A (zh) * 2014-07-11 2014-10-22 常熟市天银机电股份有限公司 一种商用制冷压缩机电机互感式无触点电流起动器
CN204068776U (zh) * 2014-07-11 2014-12-31 常熟市天银机电股份有限公司 一种商用制冷压缩机电机互感式无触点电流起动器

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