CN201611861U - Star-delta reduced voltage starter of electromotor - Google Patents

Abstract

The utility model discloses a star-delta reduced voltage starter of an electromotor. The starter comprises a star-point control module, a fault recognition control module and a fault output module, and further comprises a star-delta contactor control module, a star-delta conversion control module and a starting failure recognition module, wherein the star-point control module, the star-delta contactor control module, the star-delta conversion control module and the fault recognition control module are connected in an interlocking manner; and the failure recognition control module controls and is connected with the fault output module and the starting fault recognition module. In the star-delta reduced voltage starter of the electromotor, a star-delta starting controller is developed so as to reduce the wiring amount of a secondary line and the use of an intermediate relay and a time relay; and the arranged starting fault recognition module has the starting fault recognition function, so that when the starting time exceeds the allowable longest time, the starting fault recognition module can recognize the starting fault and output the fault alarming contacts, and the operation is safe and reliable.

Description

A kind of motor star triangle reduced voltage starter

Technical field:

The utility model relates to a kind of controller, relates in particular to a kind of controller of motor star triangle reduced voltage starting.

Background technology:

When load motor starting moment is not had and to be strict with again restrictions motor starting current and motor and to satisfy 380V/ Δ wiring condition and could adopt the starting method of star triangle; This method is: when electric motor starting motor is connected into star-like wiring, the motor reconfiguration is become triangular form wiring (switching rapidly by double-throw switch) again after the electric motor starting success; Because of the electric motor starting electric current is directly proportional with supply voltage, the starting current that this moment, electrical network provided has only 1/3 of full voltage starting electric current, but starting torque also has only 1/3 of full voltage starting moment.

Star triangle starting, he is that cost exchanges for and reduces starting current and realize to sacrifice power to belong to reduced voltage starting.So can not be without exception and determine whether to need to adopt the starting of star triangle with the size of power of motor, also need to see to be which type of load, load was heavy when generally load gently moved when needs start still can adopt the star triangle start, the starting current of squirrel-cage motor is 5～7 times of running current generally speaking, and generally be positive and negative 10% to the voltage request of electrical network, in order not form the impact excessive to line voltage, so adopt the starting of star triangle, general require power at squirrel-cage motor to surpass 10% o'clock of transformer rated power will to adopt the starting of star triangle, and have only squirrel-cage motor just to adopt the starting of star triangle.

Common control cubicle motor star triangle reduced voltage starting control is to use auxiliary relay, and the time relay waits realizes star triangle reduced voltage starting, and circuit wiring amount is more like this, and the contact is switched many, is easy to generate fault.

The utility model content:

The purpose of this utility model is that many, as to be easy to generate fault deficiencies are switched in more, the contact of circuit wiring amount when being used for remedying prior art motor star triangle reduced voltage starting, and a kind of motor star triangle reduced voltage starter that reduces the use of auxiliary relay, the time relay and have time-out protection function is provided.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of motor star triangle reduced voltage starter, this starter is made up of asterism control module, Fault Identification control module and fault output module, and it also comprises connection delta tentaculum control module, triangle conversion and control module and starting failure identification module,

Interlocking connects between described asterism control module, connection delta tentaculum control module, triangle conversion and control module and the Fault Identification control module;

Described Fault Identification control module control connection fault output module and starting failure identification module;

Be provided with the starting time delay module in described asterism control module, connection delta tentaculum control module and the triangle conversion and control module;

Described asterism control module and connection delta tentaculum control module pulsimeter number average time-delay 0.5S;

Described triangle conversion and control module is adjustable step-by-step counting time delay module.

A kind of motor star of the utility model triangle reduced voltage starter; exploitation motor star triangle starter controller; reduced secondary line route distribution quantity; auxiliary relay; the use of the time relay, a star triangle reduced voltage starter is only used in star triangle reduced voltage starting controller loop, saves production cost; improve the control cubicle reliability, and starting there are functions such as overtime protection.Star triangle reduced voltage starting controller only just can be realized with a module in a star triangle reduced voltage starting loop, in the star triangle reduced voltage starter starting time delay module is arranged, there is initiating signal to rise after 0.6 second, this time-delay can be eliminated the Fraquent start problem, avoid Fraquent start to cause the damage of main noddle on contactor, and the starting failure recognition function is arranged by the starting failure identification module that is provided with, surpass the longest permission during the time when the starting time, module will have been thought fault, and defeated fault alarm contact, safe and reliable.

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model terminals subgraphs

Fig. 3 implements illustration for the utility model

Embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

With reference to illustrated in figures 1 and 2:

A kind of motor star triangle reduced voltage starter, this starter is by the asterism control module, Fault Identification control module and fault output module are formed, it also comprises connection delta tentaculum control module, triangle conversion and control module and starting failure identification module, the asterism control module, connection delta tentaculum control module, interlocking connects between triangle conversion and control module and the Fault Identification control module, the asterism control module realizes and connection delta tentaculum control module by the fault interlocking signal, the synchronous open and-shut mode of triangle conversion and control module and Fault Identification control module is if normally off realizes that interlocking also carries out closure with other corresponding switch when promptly realizing switch.

Fault Identification control module control connection fault output module and starting failure identification module carry out Control and Feedback to it; Be provided with the starting time delay module in asterism control module, connection delta tentaculum control module and the triangle conversion and control module; Asterism control module and connection delta tentaculum control module pulsimeter number average time-delay 0.5S; Triangle conversion and control module is adjustable step-by-step counting time delay module.

N connecting to neutral line on the binding post among Fig. 2, the L line of starting to exchange fire, L1 connects asterism, L2 connects operation, L3 connects the star triangle, A wherein, B, C, D forms the fault output module, 1 and 2 is the starting failure identification module, the utility model starter is connected on the threephase asynchronous machine, as shown in Figure 3, when N connecting to neutral line, L connects live wire, 0.5 second left and right sides L1 output 220V voltage, after 0.5 second L2 output 220V voltage, realize the starting of star triangle, again through the starting time-delay, L1 stops output, L2 keeps output, spends about 0.2 second, L3 output 220V voltage, finish the starting of star triangle, in the process of starting in the delay time as 1,2 starting failure identification modules do not have feedback signal, will be considered as breaking down L1, L2, L3 stops output, A on the fault output module, B and C, switch on the D begins closure, and malfunction indicator lamp is lighted prompting and broken down.

A kind of motor star of the utility model triangle reduced voltage starter; exploitation motor star triangle starter controller; reduced secondary line route distribution quantity; auxiliary relay; the use of the time relay, a star triangle reduced voltage starter is only used in star triangle reduced voltage starting controller loop, saves production cost; improve the control cubicle reliability, and starting there are functions such as overtime protection.Star triangle reduced voltage starting controller only just can be realized with a module in a star triangle reduced voltage starting loop, in the star triangle reduced voltage starter starting time delay module is arranged, there is initiating signal to rise after 0.5 second, this time-delay can be eliminated the Fraquent start problem, avoid Fraquent start to cause the damage of main noddle on contactor, and the starting failure recognition function is arranged by the starting failure identification module that is provided with, surpass the longest permission during the time when the starting time, module will have been thought fault, and defeated fault alarm contact, safe and reliable.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (3)

1. motor star triangle reduced voltage starter, this starter is made up of asterism control module, Fault Identification control module and fault output module, it is characterized in that, it also comprises connection delta tentaculum control module, triangle conversion and control module and starting failure identification module, and interlocking connects between described asterism control module, connection delta tentaculum control module, triangle conversion and control module and the Fault Identification control module; Described Fault Identification control module control connection fault output module and starting failure identification module; Be provided with the starting time delay module in described asterism control module, connection delta tentaculum control module and the triangle conversion and control module.

2. a kind of motor star triangle reduced voltage starter according to claim 1 is characterized in that, described asterism control module and connection delta tentaculum control module pulsimeter number average time-delay 0.5S.

3. a kind of motor star triangle reduced voltage starter according to claim 1 is characterized in that described triangle conversion and control module is adjustable step-by-step counting time delay module.

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