CN200950536Y

CN200950536Y - Intelligent controller for motor

Info

Publication number: CN200950536Y
Application number: CN 200620009667
Authority: CN
Inventors: 孙学俊; 李健; 崔成军
Original assignee: 孙学俊
Priority date: 2006-09-03
Filing date: 2006-09-03
Publication date: 2007-09-19
Anticipated expiration: 2016-09-03

Abstract

The utility model provides an intelligent control apparatus for motors which relates to a control device for motors. The utility model has a closing switch, the normally closed contact of an intermediate relay, a contactor coil of the starting device of the motor being communicated between two power wires after being communicated in series, a delayed action jumping two ends of the contactor coil QC, the normally open contact of the delayed action, the normally open contact of the intermediate relay, the intermediate relay coil being communicated between two power wires after being communicated in series, one end of an opening switch and the normally open contact of a motor protector being respectively communicated with a power wire while the other end being respectively communicated between the normally open contact of the intermediate relay and the intermediate relay coil. The control apparatus can effectively control the motor when voltage fluctuation problems occur and can make the motor quickly return to normal operation which enhance the security and continuity of significant power load after voltage fluctuation problems disappear and the power returns to normal operation.

Description

The motor intelligent controller

Technical field

The utility model provides a kind of control device of motor, the control device of motor during in particular for power supply " rolling ".

Background technology

With in the electric process, " rolling " phenomenon of power supply appears sometimes." rolling " of so-called power supply generally is meant electrical network owing to thunderbolt, shorted to earth, power plant failure and other inside and outside reason cause the electrical network short trouble, and the line voltage that causes fluctuates widely in short-term, even the phenomenon of short supply interruption several seconds.Along with the development of electrical network, capacity and scale constantly enlarge, and " rolling " this unique electrical network phenomenon occurs more and more frequently, and is also increasing to the influence of the especially modernized industrial and mineral of electric consumer enterprise.Although " rolling " duration is shorter, the fluctuation of transient voltage will cause the motor breaking, and line voltage recovers the back motor and can not resume operation automatically, and the manual reversion process is generally longer, thereby cause bigger loss.Common loss comprises the appearance of safety, environmental issue and waste product that unexpected shut-down brings, the loss of raw material etc.

Summary of the invention

Technical problem to be solved in the utility model is, a kind of motor intelligent controller is provided, and when it can " rolling " take place at power supply motor effectively controlled, thereby improved the fail safe and the continuity of important motivity load operation.

The utility model is to realize like this; the motor intelligent controller; it has the combined floodgate switch; the normally-closed contact of auxiliary relay; be connected between two power lines after the contactor coil serial connection on the motor starter; delayer is connected across the contactor coil two ends; normally opened contact on the delayer; normally opened contact on the auxiliary relay; be connected between two power lines the separating brake switch behind the auxiliary relay coil tandem; normally opened contact one end on the motor protector is connected on respectively on the power line; the other end is connected on the normally opened contact on the auxiliary relay respectively; between the auxiliary relay coil.

Adopt the motor intelligent controller of said structure, in the time of " rolling " taking place at power supply motor is realized effectively control, power supply is after experience " rolling " recovery in short-term is normal, and motor can normally move fast, thereby has improved the fail safe and the continuity of important motivity load operation.And other normal running or automatic operation are in full accord with the control of conventional contactor.Sort controller is converted into parallel circuits with the series circuit in the Motor Control loop, thereby has greatly simplified circuit structure, has made things convenient for installation and operation maintenance.And therefore overcome no power consumption protector easily causes repetitive in many control circuits problem, enlarged the range of application of no power consumption protector.

Description of drawings

Fig. 1 is the schematic diagram of the utility model structure.

Embodiment

The embodiment that provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model.

As shown in drawings; the motor intelligent controller of the utility model; it is characterized in that; it has combined floodgate switch HA; the normally-closed contact ZJ2 of auxiliary relay; be connected between two power lines after the contactor coil QC serial connection on the motor starter; delayer SJ is connected across contactor coil QC two ends; normally opened contact SJ1 on the delayer; normally opened contact ZJ1 on the auxiliary relay; be connected between two power lines separating brake switch TA after the auxiliary relay coil ZJ serial connection; normally opened contact RJ one end on the motor protector is connected on respectively on the power line; the other end is connected on the normally opened contact ZJ1 on the auxiliary relay respectively; between the auxiliary relay coil ZJ.

The operation principle of the controller of the utility model is as follows.

Close a floodgate (startup): any type of reclosing command (manual or automatic), the capital makes combined floodgate switch HA closure, contactor coil QC and delayer SL simultaneously electric work, motor gets electric startup, the normally opened contact SJ1 closure that instantaneous make delay is opened, delayer SJ and contactor coil QC realize self-sustaining, and reclosing command disappearance back circuit is operate as normal still.

Separating brake (shutdown): any type of separating brake instruction (manual or automatic); the capital makes separating brake switch TA closure; auxiliary relay coil ZJ gets electronic work and self-sustaining; its normally-closed contact ZJ2 opens to cut off delayer SJ and contactor coil QC power supply; motor quits work; even separating brake instruction pop-off, the separating brake process still can effectively be finished.

When " rolling " phenomenon takes place, be example to set the anti-rolling electricity of delayer 1 second of (outage) time limit, when shaking the electric time during less than 1 second, the normally opened contact SJ1 that delayer is opened instantaneous make delay is in hold mode.Electrical network recovered just often in 1 second, and the charged motivation of contactor QC is resumed work automatically, and this moment, motor speed did not have obvious reduction, and impulse current is very low, produces and can not produce interruption.When rolling electricity time during greater than 1 second, delayer makes normally opened contact SJ1 open after 1 second in that the rolling electricity takes place, even power system restoration after 1 second, motor is also no longer resumed work.The adjusting of anti-rolling electricity time limit length should take into full account that apparatus and process requires and two kinds of factors such as electrical network impact resistance.

The physical circuit of disclosed delayer has multiple, can select for use as required.Its particular circuit configurations and operation principle no longer describe in detail.

On combined floodgate switch HA, also can be parallel with other combined floodgate switches HA1.On combined floodgate switch TA, also can be parallel with other combined floodgate switches TA1.Normally opened contact RJ is the normally opened contact on the motor protectors such as the overcurrent, overtemperature protection of peripheral hardware.

Described two power lines for the 220V power supply, are live wire and zero line, for the 380V power supply, are two live wires.

Claims

1; the motor intelligent controller; it is characterized in that; it has combined floodgate switch HA; the normally-closed contact ZJ2 of auxiliary relay; be connected between two power lines after the contactor coil QC serial connection on the motor starter; delayer SJ is connected across contactor coil QC two ends; normally opened contact SJ1 on the delayer; normally opened contact ZJ1 on the auxiliary relay; be connected between two power lines separating brake switch TA after the auxiliary relay coil ZJ serial connection; normally opened contact RJ one end on the motor protector is connected on respectively on the power line; the other end is connected on the normally opened contact ZJ1 on the auxiliary relay respectively; between the auxiliary relay coil ZJ.