CN202085114U

CN202085114U - Battery-friendly controller for pressure reduction start of high power motor and convertion between star and triangle for running

Info

Publication number: CN202085114U
Application number: CN2011202027693U
Authority: CN
Inventors: 任旭华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2011-12-21
Anticipated expiration: 2021-06-10

Abstract

The utility model relates to a battery-friendly controller for pressure reduction start of a high power motor and conversion between a star and a triangle for running. The controller comprises a control circuit and a stroke switch converter, wherein the control circuit is used for controlling a stator winding to change into a Y-shaped connection for running after the motor is separated and under the condition of light load and controlling the stator winding to return to a triangular connection for running and supplying electricity when a clutch is combined, and the stroke switch converter is connected with a stroke switch in the control circuit and comprises a movable contact head connected with a feeler lever of the stroke switch and a control operating rod of the clutch. The controller moves along with the control operating rod of the clutch, can automatically carry out reversible conversion between the star and the triangle for running when the clutch is separated and combined, the start procedure can only be carried out under the separated state of the clutch, and the controller has the protection functions of voltage loss and overload when in loss of the phase, and the like.

Description

High power motor decompression starting and star triangle conversion operation electricity-saving controller

Technical field

The utility model belongs to the Electrical Control Technology field, particularly high power motor start-up control device

Background technology

In reality is produced, all there are several the small-sized machine chains of rings supporting before and after the heavy mechanical equipment, coordinated production.Any one link goes out a problem intermittent main frame clutch separation that makes of just having to, and suspends and produces, and after waiting to fix a breakdown, makes it in conjunction with resuming production again.Generally speaking, be accumulated in 1 because of intermittent separation makes the motor no-load running time every day---and in 3 hours scopes, What is more as wood working band sawing machine, and its no-load running time is unexpectedly greater than the operating time.But because old-fashioned control appliance is unable energy-conservation, people also just have been accustomed to.For supporting high power motor starting and the timely working conditions change in the reply production process easily, large-scale manufacturing machine in equipment manufacturing all design and installation various clutches, by the separation of manual operation clutch with combine, cut off and combine motor and export to the dynamic torque of main frame to reach.But because of the dynamo-electric discrete control of the old-fashioned starting equipment of producing in the past and can't carry out reversible conversion operation, thereby cause these plant equipment that power consumption is very big in process of production under the underloading situation after the clutch separation, motor still obtains the total head power supply, haul clutch outer member idle running with very low power factor and efficient, wasted a large amount of valuable energy.

Summary of the invention

The utility model purpose is a kind of high power motor decompression starting of design and star triangle conversion operation electricity-saving controller, to reach the purpose of saves energy.

Specifically, high power motor decompression starting and star triangle conversion operation electricity-saving controller, its be comprise the control motor after separation under the underloading situation stator winding become automatically Y connection running simultaneously clutch in conjunction with the time revert to the control circuit of star-star-delta connection Y-Y-running total head power supply automatically, and the travel switch transducer that is connected with travel switch in this control circuit, and described travel switch transducer comprises a movable contact that is connected with the travel switch feeler lever, and this movable contact is connected with clutch control rod.

The utility model is at large-scale power driving machinery control carbon emission reduction, the energy-saving and cost-reducing and energy-saving motor start-up control equipment of the electromechanical integration of new generation trial-produceed successfully.It enlarges the clutch function of utilizing on the equipment, under the underloading situation after it separates, the motor stator winding is become the Y connection running automatically, thereby realizes purpose of saving; If want clutch in conjunction with the time, can revert to the power supply of star-star-delta connection Y-Y-running total head again automatically, to reach full load outputting power moment of torsion.The utility model is followed clutch pull rod action, carries out the reversible conversion operation of Y--△ in clutch separation automatically when combining, and can only enter starting sequence under the clutch separation state, possesses protective effects such as phase failure decompression, overload simultaneously.

Description of drawings

Fig. 1 is the utility model control circuit schematic diagram.

Device description of symbols: knife switch QS, three-phase alternating current L1, L2, L3, fuse Fu, miniature transformer T, A.C. contactor KM, KMY, KM △, auxiliary relay KA1, KA2, KA3, travel switch SQ, stop button SB1, SB3, starting button SB2, SB4.

Fig. 2 is external travel switch transducer of the utility model and travel switch connection diagram.

Figure number explanation: 1-travel switch SQ normally closed interlock, 2-travel switch SQ normally closed interlock, 3-travel switch SQ normally open contact, 4-travel switch SQ normally open contact, 5-travel switch roller, 6-fork plate, 7-travel switch converter shell, 8-shift fork adjusting rod screw rod, 9-fastening screw nut, 10-shift fork mandrel, 11-shift fork movable sleeve, 12-main frame clutch control rod, 13-travel switch housing.

Embodiment

Fig. 1,2 has provided the concrete structure of this high power motor decompression starting and star triangle conversion operation electricity-saving controller, it comprise the control motor after separation under the underloading situation stator winding become automatically Y connection running simultaneously clutch in conjunction with the time revert to the control circuit of star-star-delta connection Y-Y-running total head power supply automatically, and the travel switch transducer that is connected with travel switch in this control circuit, and described travel switch transducer comprises a movable contact that is connected with the travel switch feeler lever, and this movable contact is connected with clutch control rod 12.Described movable contact is installed on the roller 5, this roller sidepiece is equipped with fork plate 6, fork plate 6 is connected with shift fork adjusting screw(rod) 8 in being contained in shift fork mandrel 10, shift fork movable sleeve 11 is housed on the shift fork mandrel 10 and shift fork movable sleeve 11 upper ends are connected on the clutch control rod 12.Described control circuit has travel switch, be connected to auxiliary relay KA1 and KA2 respectively on two contacts of the trip switch, auxiliary relay KA1 is connected with KMY with two A.C. contactor KM △ respectively with KA2, and two A.C. contactor KM △ are connected with KMY all and are connected with the motor M that is controlled; Two A.C. contactor KM △ are connected with knife switch QS by A.C. contactor KM with KMY simultaneously; Starting button SB2 and stop button SB1 and be installed between knife switch QS and the A.C. contactor KMY.

Make principle according to motor designs, stator winding runs well motor for star-star-delta connection Y-Y-after changing Y connection under the underloading situation, is added in voltage on the winding and can reduces to rated voltage

Doubly (being about 219 volts).Because the iron loss of motor is similar to voltage squared and is directly proportional, so after the step-down power supply, active loss will reduce.Not only limited starting current, and no-load current also can be reduced to original 1/3 thereupon.Large-scale manufacturing machine supporting high power motor when running well its winding generally all be star-star-delta connection Y-Y-, utilize the clutch function on the equipment, under the underloading situation after it separates, the motor stator winding is become the Y connection running automatically, thereby realize purpose of saving; If want clutch in conjunction with the time, can revert to the power supply of star-star-delta connection Y-Y-running total head again automatically, to reach full load outputting power moment of torsion.

Operation principle:

According to motor with watt level the different rule of rated current, this controller is carried out the producing in serial form of pressing the controlled power size and distinguishing model, increase along with the control capacity, controller box also increases thereupon, and corresponding variation also made in last Chinese character in its name of product: when the product of control capacity during in the 13----30KW scope is called " controller "; Product when the 40----125KW scope is called " control cabinet "; Product when the 150----300KW scope is called " control cubicle ".Selected A.C. contactor, integrated protector for electric motor, auxiliary relay and travel switch etc. are brand-name, high-quality new products, its overload capacity and motor rated current interference coupling.Because travel switch SQ draws with connecting line and is installed on the host computer control pedestal,,, adopt the 36V safe voltage to give auxiliary relay KA1, KA2 power supply separately so in its circuit, installed a miniature transformer additional as power supply in order to keep the safety in production.Also can on the controller box panel, install electric current, voltmeter additional according to user's needs, so that monitor and measure the operation and the status of energy consumption of motor intuitively.Aspect the automatic protection of motor operation; this controller has been eliminated old-fashioned sensitivity and the very slow thermal relay of reset speed owed in design and installation; and then adopted the quick restoration type comprehensive protection device of novel perforations formula magnetic induction; not only improved production efficiency, substantially had rapid and reliable phase shortage automatic protection functions over more than 50 year first but also motor starting and control equipment is come out.

The current trend of this controller in controlling process is: under the clutch separation state, press start button SB2 or SB4, L1 phase line current is by stopping knob SB1 and SB3, flowing through the auxiliary normally closed interlock of A.C. contactor KM △ again; Because controller operates as the master with star-star-delta connection Y-Y-in the course of the work; for saving coil electricity consumption travel switch 36V power supply of connection auxiliary relay KA1 earlier when being designed to the running of Y shape herein; the KA1 normally open contact is connected after the adhesive; so just make Control current enter A.C. contactor KMY coil smoothly; at this moment; the end of interior 3 A.C. contactors of controller and auxiliary relay KA3 and time relay KT coil all connects together; and through straight-through behind the comprehensive protector of motor normally closed interlock in the L2 phase line; so KMY is adhesive immediately earlier---main contact is connected the Y point; auxiliary normally open contact KMY connects A.C. contactor KM coil and adhesive; then its main contact is connected 3 cross streams power supplys; two auxiliary normally open contacts are connected the concatenation type holding circuit, and motor just also gets into smooth with Y type connected mode decompression starting continuously in moment.In the time will formally producing, combination along with clutch, after pull bar produces displacement, the shift fork that the companion is connected on above it will drive travel switch cut-out auxiliary relay KA1 coil power, discharge back normally open contact KA1 disconnection, normally closed interlock KA1 connection, the disconnection of normally open contact KA1 discharges A.C. contactor KMY outage and withdraws from the Y point, and auxiliary normally closed interlock KMY recovers current.For prevent clutch in conjunction with the time motor with the at full capacity big electric current across-the-line starting of △ shape connected mode, danger side of body equipment and power grid security, so the power taking of A.C. contactor KM △ coil is in the following contact of the auxiliary normally open contact of A.C. contactor KM second latching circuit, at this moment because KM has been in attracting state, Control current is straightway to enter A.C. contactor KM △ coil and makes its adhesive immediately so the connection of normally closed interlock KA1 makes---and the connection of main contact makes stator winding moment become the running of △ shape connected mode, the fully loaded output torque.And need to suspend when producing midway, will draw back clutch, cut off the power output of motor, but along with the contraction and the shift fork of clutch pull rod are return, travel switch just automatically resets to normally closed interlock and connects the normally open contact off-state, and auxiliary relay KA1 adhesive, KA2 are discharged.Withdraw from star-star-delta connection Y-Y-because of the disconnection of the normally closed head of KA1 discharges A.C. contactor KM △ main contact, the connection of KA1 normally open contact makes A.C. contactor KMY adhesive immediately again, and like this, motor just under the underloading situation, returns to Y shape connected mode energy-saving operation again.So control procedure repeatedly drives auxiliary relay commander KM △ and the action by turns of two A.C. contactors of KMY by travel switch entirely, the connected mode of converting motor stator winding just can be finished, again because the roller shift fork of travel switch companion is connected on the clutch control rod, like this, still according to the method for operating original equipment, when combining, the connecting and disconnecting of two groups of contacts of travel switch SQ have also just been operated in the separation of operated clutch in passing.For energy savings to greatest extent, in A.C. contactor KM first self-locking circuit, installed time relay KT additional again, control the power supply of its coil by auxiliary relay KA2, outage when A.C. contactor KM △ works, when A.C. contactor KMY works, connect, can make that motor is unloaded under operatorless situation to surpass setting-up time (10-15 second) stall of cutting off the power supply automatically.So not only can reduce long-time unloaded power consumption; but also can be when the contingency travel switch breaks down; but motor also with Y shape connected mode running and operating personnel under ignorant situation in conjunction with clutch after auto power off just in the short time, protection motor safety.

The utility model is through testing on hollow brickmaking unit, its unit main frame is joined the whole process control that the 90KW motor carries out decompression starting and production process, stable operation till now, experiment shows this new controller flexible operation, safe and reliable, every performance has all reached designing requirement, energy-saving effect is but well beyond expected design, make no-load current reduce to original 1/4, on this same motor, no-load current before installing during the old-fashioned starting equipment control of actual measurement is 50.3A, and this advanced control equipment back no-load current that comes into operation only is 12.5A, and same power saving rate under the underloading situation is up to 75%.If 37.8 spend by calculating in minimum unloaded one hour just can to economize on electricity every day.Add factors such as taking other measure economize on electricity, deduction shut-downs in the controller, only this motor is enough to break through the ten thousand degree high pointes of economizing on electricity the whole year.

Application notice:

1, be bonded to length of lead-out wire and line loss voltage drop between the controller box in order to reduce motor wiring, controller box should be tried one's best and be put near motor.

2, after the travel switch transducer is drawn with connecting line, be installed on the main frame base, shift fork movable sleeve and clutch pull rod companion connect, and should make the travel switch moving contact behind the eliminating gap before the clutch combination puts in place, produce action.

3, for energy savings as much as possible, this controller is except that starting button SB2 being installed on panel and stopping the button SB1, also can draw external connection, strange land start button SB4 is installed on the clutch control control desk and stops button SB3, so that need timely start-stop controller power source midway, reduce the motor electricity consumption time.

Claims

1. high power motor decompression starting and star triangle conversion operation electricity-saving controller, it is characterized in that comprising the control motor after separation under the underloading situation stator winding become automatically the Y connection running simultaneously clutch in conjunction with the time revert to the control circuit of star-star-delta connection Y-Y-running total head power supply automatically, and the travel switch transducer that is connected with travel switch in this control circuit, and described travel switch transducer comprises a movable contact that is connected with the travel switch feeler lever, and this movable contact is connected with clutch control rod (12).

2. high power motor decompression starting according to claim 1 and star triangle conversion operation electricity-saving controller, it is characterized in that described movable contact is installed on the roller (5), this roller sidepiece is equipped with fork plate (6), fork plate (6) is connected with shift fork adjusting screw(rod) (8) in being contained in shift fork mandrel (10), shift fork movable sleeve (11) and shift fork movable sleeve (11) upper end is housed on the shift fork mandrel (10) is connected on the clutch control rod (12).

3. high power motor decompression starting according to claim 1 and star triangle conversion operation electricity-saving controller, it is characterized in that described control circuit has travel switch, be connected to auxiliary relay KA1 and KA2 respectively on two contacts of the trip switch, auxiliary relay KA1 is connected with KMY with two A.C. contactor KM △ respectively with KA2, and two A.C. contactor KM △ are connected with KMY all and are connected with the motor M that is controlled; Two A.C. contactor KM △ are connected with knife switch QS by A.C. contactor KM with KMY simultaneously; Starting button SB2 and stop button SB1 and be installed between knife switch QS and the A.C. contactor KMY.

4. high power motor decompression starting according to claim 3 and star triangle conversion operation electricity-saving controller, it is characterized in that described control circuit has installed time relay KT additional in A.C. contactor KM first self-locking circuit, and control the power supply of its coil by auxiliary relay KA2, outage when A.C. contactor KM △ works is connected when A.C. contactor KMY works.

5. according to claim 3 or 4 described high power motor decompression startings and star triangle conversion operation electricity-saving controller, it is characterized in that adopting in the described control circuit miniature transformer as power supply, and give auxiliary relay KA1, KA2 power supply separately with the 36V safe voltage.

6. high power motor decompression starting according to claim 5 and star triangle conversion operation electricity-saving controller is characterized in that also installing additional in the described control circuit electric current, voltmeter.

7. high power motor decompression starting according to claim 6 and star triangle conversion operation electricity-saving controller, it is characterized in that in the described control circuit strange land start button SB4 being installed and stopping button SB3 strange land start button SB4 and stop button SB3 and be connected starting button SB2 and stop the drawing on the external connection of button SB1 on the clutch control control desk.