CN2766436Y

CN2766436Y - Multi elevator sharing DC generatrix energy-saving device

Info

Publication number: CN2766436Y
Application number: CN 200420110175
Authority: CN
Inventors: 查建军; 杨志勇
Original assignee: CHANGJIANG SIMAIPU LIFT Co LTD SHANGHAI
Current assignee: CHANGJIANG SIMAIPU LIFT Co LTD SHANGHAI
Priority date: 2004-11-23
Filing date: 2004-11-23
Publication date: 2006-03-22
Anticipated expiration: 2014-11-23

Abstract

The utility model provides energy-saving device for DC generatrix shared by a plurality of elevators, which comprises an air switch, a contactor, a rectifier, inverters, a motor and a fuse. The utility model is characterized in that the DC sides of the control system of the elevators are respectively connected to the sharing DC generatrix by a contactor, any elevator which are connected to the DC generatrix can generate energy when the elevator descends with load and ascends without load, and the energy can feed back to the DC generatrix through respective inverters. Other elevators which are connected with the DC generatrix can fully utilize the energy which is used up by a braking resistance, the energy absorbed from power system is reduced, and the purpose of energy saving is achieved. When the electricity of one elevator switches off, the air switch of the elevator is cut. In order to limit the fault coverage of the elevator and avoid influencing the use of other elevators, the fault elevator is cut from the DC generatrix by the quick fuse. The utility model has the characteristics of low cost, simple structure, safety, etc.

Description

The energy saver of many elevator common DC buses

Technical field

The utility model relates to hoisting machinery, refers to the elevator crane especially, and many elevators are taked the energy saver of common DC bus.

Background technology

In elevator industry, towed elevator is for saves energy, adopts the method for taking turns a side and increase counterweight at elevator traction to come the weight of balance opposite side lift car weight and fractional load.Reduced the power loss of motor like this.When the elevator underloading descended with the heavy duty rising, elevator needed obtain electric energy from electric power system.When the elevator underloading rose with heavy duty decline, the motor on the elevator was in generating state, produces a certain amount of electric energy, and this part electric energy is consumed by the brake resistance on the elevator by the DC side of inverter fed to apparatus for controlling elevator.

Summary of the invention

The purpose of this utility model is to provide a kind of energy saver of many elevator common DC buses, make other elevators that heavy duty is risen or underloading descends of energy resource supply that any elevator produces in the elevator of common DC bus go to use, reach the purpose of energy savings.

The technical solution of the utility model is: the DC side in many apparatus for controlling elevator is connected on the dc bus with a contactor respectively.Like this, be connected the energy that any elevator on the dc bus produces when heavy duty decline and underloading rising, inverter fed by separately is to dc bus, be connected other elevators on the dc bus and just can utilize fully and be braked this part energy that resistance consumption falls originally, reach the purpose of the conservation of power energy.

Effect of the present utility model is: with many elevator common DC buses, make the elevator that heavy duty is risen or underloading descends in other elevators of energy resource supply that any elevator produces in the elevator of common DC bus go to use, reach the purpose of energy savings.

Description of drawings

Fig. 1 is an electrical block diagram of the present utility model

Label declaration in the accompanying drawing:

The 1-air switch; 12-air switch two;

1n-air switch n; The 2-contactor;

22-contactor two; 2n-contactor n;

The 3-rectifier; 32-rectifier two;

3n-rectifier n; The 4-inverter;

42-inverter two; 4n-inverter n;

The 5-dc bus;

The 6-motor; 62-motor two;

6n-motor n; The 7-fuse;

72-fuse two; 7n-fuse n;

Embodiment

Below in conjunction with accompanying drawing the technical solution of the utility model is further described, as shown in Figure 1.Be connected on the dc bus 5 being connected with a winding tentaculum on the DC side branch line in many apparatus for controlling elevator respectively.The motor 1 of first elevator is when underloading rising or heavy duty decline, motor 1 on this elevator is in generating state, produce a certain amount of electric energy, this electric energy will feed back to the DC side of elevator 1 control system by the inverter 4 of this TV station elevator, flow through fuse 7 and contactor 2 main contactss are transported on the dc bus 5, elevator 2 or elevator n are when underloading decline or heavy duty rising, then elevator 2 or elevator n will make full use of elevator 1 and feed back to electric energy on the dc bus 5, make elevator 2 or elevator n obtain to such an extent that electric energy reduces from electric power system.In like manner, the electric energy that elevator 2 or elevator n produce when underloading rising or heavy duty decline also is transported on the dc bus 5 and uses for other elevators, thereby reaches energy-conservation effect.When elevator need have a power failure, the air switch that only needs to cut off this TV station elevator got final product, and needed to cut off the power supply as elevator 1, only needed to cut off air switch 1, thereby cut off the power supply of contactor 2, by the main contacts disconnection dc bus 5 of contactor 2.Other elevators of common DC bus 5 in like manner can cut off and being connected of dc bus 5 easily, have guaranteed the safety of the person and lift facility.When fault such as ground connection or short circuit takes place in certain elevator in the elevator of common DC bus 5, cut off being connected of these elevators and dc bus 5 by the fast acting fuse on this TV station elevator 7, break down as elevator 1, fast acting fuse 7 fusing, disconnection elevator 1 is connected with 5 of dc buss, other elevators in like manner make fault be limited in the minimum zone like this, reach the purpose that prevents that fault from further enlarging.

Claims

1, a kind of energy saver of many elevator common DC buses comprises motor, inverter, rectifier, air switch, it is characterized in that:

In many apparatus for controlling elevator, be provided with contactor and fuse separately, and be connected on the shared dc bus.

2, the energy saver of many elevator common DC buses according to claim 1 is characterized in that:

Be connected with a winding tentaculum contact on the DC side branch line in many apparatus for controlling elevator respectively, be connected on the dc bus.

3, the energy saver of many elevator common DC buses according to claim 1 is characterized in that:

Be connected with fuse and contacts of contactor on rectifier in every apparatus for controlling elevator and the AC line branch line between the inverter, be connected with shared dc bus again.