CN2361029Y - Compensating delayed starting and controlling device for motor - Google Patents

Abstract

The utility model provides a compensating delayed starting control device for a motor, which comprises make contacts of an AC contactor arranged in a compensation capacitor loop and a section delayed control circuit which controls the contacts, wherein, control signals output by the section delayed control circuit are delayed for 0.5 to 3 minutes at a first stage and delayed for 1.5 to 6 minutes at a second stage, and so on; the time interval between every two stages is 1 to 3 minutes; the output of each stage controls the action of a group of contacts of the AC contactor so that the throw-in of one group of compensation capacitors is controlled. The utility model has the advantages of simple and easy operation, stable operation, and wide application.

Description

Motor compensation delay start-up control device

The utility model relates to a kind of motor compensation delay start-up control device, belongs to motor compensation start-up control technical field.

At present, the threephase asynchronous energy-saving control device has frequency-adjustable speed-adjustable device, pole changing battery saving arrangement, speed differential clutch speed regulating device, voltage and speed governing by transistor device, computer regulated control device etc., though more than stable performance in the device, but one-time investment is too high, maintenance difficulty is big, unrealistic to the comprehensive penetration and promotion of enterprise, current enterprise practical is maximum is comprehensively capacitance compensation and two kinds of capacitance compensations on the spot on the spot separately, no matter comprehensive local compensation or independent local compensation are to the asynchronous motor of Electric Traction equipment, power savings is all very obvious.But, when the compensator of motor use is used manual operation, operating difficulties, the starting time is wayward, and long meeting scaling loss compensator is too short unfavorable to motor.Simultaneously, once drop into capacitance when big, electrical network is impacted very big, surge current is concentrated when especially dropping into simultaneously with motor.Now existing various start-up control devices, most structures, circuit are complicated, are not suitable for China's field conditions and maintenance personal's quality present situation.As patent No. 96202252,92201711 etc.

The purpose of this utility model is the simple, reliable of a kind of suitable China's national situation of design, the motor compensation delay start-up control device that field adjustable puts in place.

The technical solution of the utility model is the method input compensation device with time-delay, segmentation control, so that reduce the impact of surge current to power consumption equipments such as electrical network, motors.This compensation delay start-up control device comprises make contact CK1, the CK2 of the A.C. contactor that is arranged in the building-out capacitor loop ... fragment delay control circuit with this group contact of control, the first order delay time of fragment delay control circuit is 0.5-3 minute, second level delay time is 1.5-6 minute, and multistage the rest may be inferred.Guarantee during adjustment that each inter-stage time interval is 1-3 minute, move each one group of CK contact of level time-delay output control, has promptly controlled the input of one group of capacitive compensator;

Delay control circuit is by the elementary cell of a prescription wave oscillator as fragment delay in this programme, the wide 0.5-3 of first square wave minute, second square wave is wide to be 1.5-6 minute, the rest may be inferred, the potentiometer of adjusting width is arranged in each square-wave oscillator circuit, wide according to the on-the-spot adjustment each side wave-wave that needs, between square wave each other width interval be 1-3 minute, square-wave output signal control auxiliary relay J1, J2, J3 ... work, J1, J2, J3 control CK1, CK2, CK3 ... work, thereby control is respectively organized capacitive compensator time-delay, grouping, is successively dropped into successively.

The utility model has the advantages that simple, reliable, particularly can be according to field working conditions, length, the size of capacity, start mode, state of starting operating as the motor starting time are that field adjustables such as heavy duty or underloading are determined delay time, set the The optimal compensation making time, guaranteeing under the various operating modes can both smooth transition, easy to operate, applied widely, be not only applicable to motor, motor cluster also is applicable to compact electrical transformers low-pressure side reactive power compensation usefulness.

Below accompanying drawing is described, and further sets forth embodiment of the present utility model and operation principle:

Fig. 1 is a theory diagram of the present utility model, and load D and former control circuit are constant, the contact of fragment delay control circuit control CK1, CK2 A.C. contactor, and C1, C2 are building-out capacitors, RT is a fuse.

Fig. 2 is circuit theory diagrams, and power supply is added to operating voltage of delay circuit after transformer B step-down, D rectification, C7 filtering, make its work, and the charged adhesive J1 of J1 relay coil normally open contact makes J1 relay coil work self-locking.Ic chip 1, IC2 elements such as (CD406 or HCF4060B) are formed multistage square-wave oscillator circuit, 4060 is 14 grades of two divided-frequency serial counters, carry oscillator, constitute first order square-wave oscillator by (9), (10), (11) tripod and R1, R2, W1, C1, constitute second level square-wave oscillator [its period T 1=2.2 (R1+R2+W1) C1 and T2=2.2 (R7+R8+W3) C3] with R7, R8, C3, W2, change potentiometer W1 or W3 and can change cycle of oscillation.R3, W2 play the effect of one-level vibration amplitude limit.R9, W4 play the effect of secondary amplitude limit.D2, D4 oscillates locking action make the oscillator failure of oscillations.(11) pin is a signal input part, oscillator signal is imported by (11), behind 14 grades of frequency divisions, export high level signal [beginning (3) pin is a low level] by (3) pin again, (8), (16) pin is the IC power end, (12) pin is a clear terminal, C2, R5, R6, D1 form clear circuit, and R10, R11, D3, C4 form the zero clearing of secondary square wave, and R4, R12, C5, C6 play the current limliting filter action.Base resistance, BG1, BG2 that R15, R16 are respectively BG1, BG2 play the effect of high level saturation conduction, and J2 is charged in the BG1 conducting, contact closure, and the CK1 coil is charged, the self-locking of CK1 contact closure.Delayed time 1-3 minute, J3 is charged in the BG2 conducting, contact closure, and CK2 is charged, the contact closure self-locking.J2, J3 are auxiliary relays, the coil of controlling A.C. contactor CK1, CK2 respectively gets the electric time, and LeD1, LeD2 are that Light-Emitting Diode plays indicative function, and R13 and R14 are current-limiting resistances, D5, D6 are the afterflow diodes, QA is the motor start-up button, and K is a hand switch, and T1, T2 are indicator lights, TA is a stop button, RT is the fuse of capacitor loops, and C is a compensation condenser, and D is load.

The utility model embodiment is provided by Fig. 2, and concrete element is selected for use and is: resistance R 1, R13, R14 are 2.2K; R2, R3, R7, R8, R9 are 4.7K; R4, R12 are 1.5K; R5, R10 are 100K; R6, R11, R15, R16 are 10K.Capacitor C 1 is 0.01u/63V; C2, C4 are 0.15u/63V; C3 is 0.022u/63V; C5, C6 are 4.7u/25V; C7 is 100u/25V.Diode D1, D3 are IN4148; D2, D4 are 2CK; D5, D6, D ₀Be IN4001; LED1, LED2 are light-emitting diodes.Triode BG1, BG2 are C9014; Relay J 1, J2, J3 are DC12V, 400 Ω; Integrated circuit (IC) 1, IC2 are HCF4060.

Claims (1)

1, a kind of motor compensation delay start-up control device, comprise the make contact CK1 that is arranged in the A.C. contactor of respectively organizing the building-out capacitor loop, CK2 ... CKN and fragment delay control circuit, the output of fragment delay control circuit meets auxiliary relay J1, J2, J3 ... the Jn coil, auxiliary relay J1, J2, J3 ... the contact of Jn and A.C. contactor CK1, CK2, CK3 ... the series connection of CKn coil, it is characterized in that the fragment delay control circuit is by the elementary cell of a prescription wave oscillator as fragment delay, the wide 0.5-3 of first square wave minute, second square wave is wide to be 1.5-6 minute, the rest may be inferred, the potentiometer of adjusting width is arranged in each square-wave oscillator circuit, wide according to the on-the-spot adjustment each side wave-wave that needs, the wide each interval of each square wave is 1-3 minute, square wave output meets auxiliary relay J1, J2, J3 ... the coil of Jn, J1, J2, J3 ... the contact of Jn and A.C. contactor CK1, CK2, CK3 ... the coil series connection of CKn, thereby by its make contact CK1, CK2, CK3 ... CKn has controlled and has respectively organized the capacitive compensator time-delay, grouping successively drops into successively.

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