CN203590093U

CN203590093U - Multi-motor soft start circuit structure

Info

Publication number: CN203590093U
Application number: CN201320677390.7U
Authority: CN
Inventors: 程竹
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2013-10-31
Filing date: 2013-10-31
Publication date: 2014-05-07
Anticipated expiration: 2023-10-31

Abstract

The utility model discloses a multi-motor soft start circuit structure. The circuit structure is composed of a breaker QM, a soft starter N, contactors KM11, KM12, KM13, KM21, KM22 and KM23, relays FR1, FR2 and FR3, fuses FU1, FU2 and FU3 and motors M1, M2 and M3. The circuit structure is simple and has high reliability. Only one soft starter is needed to start multiple large-power motors in order. Requirements of industrial production are met, energy consumption is lowered greatly and cost is saved. In the circuit structure, the line arrangement quantity and the cabinet usage quantity are decreased, The circuit structure can be used in a room with narrow power distribution space and has strong applicability.

Description

A kind of circuit structure of multiple electric motors soft start

Technical field

The utility model relates to a kind of circuit structure of multiple electric motors soft start, belongs to industrial power distribution and control technology field.

Background technology

In industrial power distribution and control, many heavy-duty motors need to adopt soft start (as shown in Figure 2),, after motor stabilizing operation, switch to conventional loop power supply (bypass power supply).For the circuit structure of soft start conventionally by soft initiator with design of electrical motor for corresponding one by one, this circuit structure advantages of simple comparatively in the design of original industrial power distribution, but, along with energy-saving and cost-reducing and requirement cheaply improve constantly, when using the situation of many heavy-duty motors, sort circuit structure is just difficult to satisfy the demands.

Summary of the invention

The technical problem that the utility model solves is: provide a kind of structure comparatively simple, can significantly reduce the circuit structure of energy consumption, cost-saving multiple electric motors soft start, to overcome the deficiencies in the prior art.

The utility model is to form like this: it is by circuit breaker Q M, soft initiator N, and contactor KM11, KM12, KM13, KM21, KM22, KM23, relay FR1, FR2, FR3, fuse FU1, FU2, FU3, motor M 1, M2, M3 form; Bus enters soft initiator N after circuit breaker Q M, then after contactor KM11, KM12, KM13, enters separately respectively motor M 1, M2, M3 by soft initiator N, forms soft start loop; Bus is also connected with contactor KM21, KM22, KM23 respectively after fuse FU1, FU2, FU3, then after relay FR1, FR2, FR3, enters separately motor M 1, M2, M3 by contactor KM21, KM22, KM23, forms bypass power supply.

Owing to having adopted technique scheme, compared with prior art, circuit structure of the present utility model is comparatively simple, and reliability is higher.Only need the soft initiator just can many heavy-duty motors of sequence starting, meet industrial needs, significantly reduced energy consumption, saved cost.The utility model has also reduced line arrangement quantity and bin usage quantity simultaneously, in the room of some distribution narrow spaces, also can use, and applicability is stronger.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the electrical block diagram of soft starter for motor in background technology;

Being labeled as of accompanying drawing: QM-circuit breaker, N-soft initiator, KM-contactor, FR-relay, FU-fuse, M-motor.

Embodiment:

Embodiment of the present utility model: as shown in Figure 1, it is by circuit breaker Q M, soft initiator N, contactor KM11, KM12, KM13, KM21, KM22, KM23, relay FR1, FR2, FR3, fuse FU1, FU2, FU3, motor M 1, M2, M3 form; Bus is entered after circuit breaker Q M to soft initiator N, then after contactor KM11, KM12, KM13, enter separately respectively motor M 1, M2, M3 by soft initiator N, form soft start loop; Again bus is connected with contactor KM21, KM22, KM23 respectively after fuse FU1, FU2, FU3, then after relay FR1, FR2, FR3, enters separately motor M 1, M2, M3 by contactor KM21, KM22, KM23, form bypass power supply.

In galvanization, first closed contactor KM11, motor M 1 soft start; after its stable operation reaches synchronous speed, contactor KM11 and contactor KM21 are switched, control KM21 contactor closed; through relay FR1 protection, form general electric motor loop, it is carried out to distribution and control.Equally can sequence starting motor M 2, M3, and make its normally steady operation, contactor can be controlled by existing software programming or mechanical chain.

Execution mode of the present utility model is not limited to above-described embodiment, and the various variations of making under the prerequisite that does not depart from utility model aim all belong to the protection range of utility model.

Claims

1. a circuit structure for multiple electric motors soft start, is characterized in that: it is to consist of circuit breaker (QM), soft initiator (N), contactor (KM11, KM12, KM13, KM21, KM22, KM23), relay (FR1, FR2, FR3), fuse (FU1, FU2, FU3), motor (M1, M2, M3); Bus enters soft initiator (N) after circuit breaker (QM), then after contactor (KM11, KM12, KM13), enters separately respectively motor (M1, M2, M3) by soft initiator (N), forms soft start loop; Bus is also connected with contactor (KM21, KM22, KM23) respectively after fuse (FU1, FU2, FU3), by contactor (KM21, KM22, KM23), after relay (FR1, FR2, FR3), entered separately again motor (M1, M2, M3), form bypass power supply.