CN201097221Y

CN201097221Y - A frequency conversion shift system for parallel operation blower

Info

Publication number: CN201097221Y
Application number: CNU2007200568123U2007200568123U
Authority: CN
Inventors: 沈剑山
Original assignee: DONGGUAN CAMDA GENERATOR WORK Co Ltd
Current assignee: DONGGUAN CAMDA GENERATOR WORK Co Ltd
Priority date: 2007-09-11
Filing date: 2007-09-11
Publication date: 2008-08-06
Anticipated expiration: 2017-09-11

Abstract

The utility model relates to a frequency conversion speed regulating system for air fans running in parallel, which comprises a plurality of air fans arranged in parallel, a main PID controller is connected on one of the air fans in series, a driven controller which works according to the command of the main PID controller is respectively connected on the rest of air fans in series, the main PID controller is electrically connected with the driven controller, a working signal command is transmitted to the driven controller through the main PID controller, to ensure the driven controller to run by tracking the main PID controller; the main PID controller is electrically connected with a pressure measuring circuit connected on a circuit in parallel, and is used for receiving the sensing signals of the pressure measuring circuit to control the rotating speed of the air fans; wherein through a mode of adopting the main PID controller to command the corresponding driven controller to work among the air fans run in parallel, the driven controller runs by tracking the main PID controller, and therefore the normal running of the air fans which are connected in parallel is ensured.

Description

A kind of fan frequency conversion governing system of parallel running

Technical field

The utility model relates to a kind of fan frequency conversion governing system, refers in particular to a kind of fan frequency conversion governing system of thereof using PID controller control parallel running.

Background technology

In engineering reality, the regulator control law that is most widely used is ratio, integration, differential control, is called for short PID control, claims PID to regulate again.The PID controller comes out so far,, good stability simple in structure with it, reliable operation, easy to adjust and become one of major technique of Industry Control.PID control also has PI and PD control in the reality, the PID controller is exactly the error according to system, and proportion of utilization, integration, difference gauge calculate that controlled quentity controlled variable controls.

At present, if the corresponding control of frequency converter one a typhoon machine rotating speed comes the controlled target blast, adopting the PID controller is the means that very simply and again are easy to realization, yet, under some occasion, when two of needs or the parallel running of many typhoons machine, generally can adopt the PID controller of many platform independent to carry out operation; As shown in Figure 1, be that example describes now with two typhoon machines, from figure, can know and see under two typhoon machines (a, b) situation in parallel, be connected in series a PID controller (a1, b1) by every typhoon machine (a, b), and each PID controller (a1, b1) electrically connects with pressure measurement circuitry (c) in the line in parallel all; Yet, in the true process as can be known, the deviation that always has the reference mark between each PID controller (a1, b1), and be exactly the otherness of listening deviation because of this reference mark partially, make the PID controller under integral action, can cause the extreme energy imbalance of two typhoon machines (a, b) power division to take place, a typhoon machine full speed running also can take place thereupon, the then zero-speed operation of another typhoon machine, therefore, how to overcome and become the problem that current industry is demanded improvement urgently in the prior art.

The utility model content

The utility model fundamental purpose is to provide a kind of fan frequency conversion governing system of parallel running, and it utilizes main PID controller instruction to carry out work from movement controller accordingly, further overcomes the existing in prior technology deficiency.

For realizing above-mentioned purpose, the utility model is taked following technology case:

A kind of fan frequency conversion governing system of parallel running, comprise a plurality of blower fans that are arranged in parallel, be serially connected with a main PID controller therein on the blower fan, and all be connected in series on remaining blower fan one according to main PID controller instruction works from movement controller, this main PID controller with electrically connect from movement controller, give from movement controller by this main PID controller transportation work signal instruction, make from movement controller and follow the tracks of main PID controller operation; This main PID controller is electrically connected with pressure measurement circuitry on the line in parallel, controls rotation speed of fan in order to the detection signal that receives pressure measurement circuitry.

The utility model compared with prior art, its advantage is the pattern that has adopted main PID controller instruction to carry out work accordingly from movement controller in the parallel running blower fan, make from movement controller and follow the tracks of main PID controller operation, so overcome the existing deficiency of pattern that needs the work of a plurality of independently PID controller in the prior art.

Description of drawings

Fig. 1 is the prior art circuits structural representation;

Fig. 2 is the utility model electrical block diagram.

The drawing reference numeral explanation:

A, b, blower fan a1, b1, PID controller c, pressure measurement circuitry

1, blower fan 11, PID controller

2, blower fan 21, from movement controller

3, pressure measurement circuitry

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 2, a kind of fan frequency conversion governing system of parallel running, comprise two blower fans that are arranged in parallel (1,2), be serially connected with a main PI D controller (11) therein on the blower fan (1), and blower fan (2) go up serial connection one according to main PID controller (11) instruction works from movement controller (21), this main PID controller (11) with electrically connect from movement controller (11), give from movement controller (21) by this main PID controller (11) transportation work signal instruction, make from movement controller (21) and follow the tracks of main PID controller (11) operation; This main PID controller (11) is electrically connected with pressure measurement circuitry (3) on the line in parallel, this pressure measurement circuitry (3) is wherein adjusted the rotating speed of blower fan (1) in order to the detecting blast by the detection signal of main PID controller (11) reception pressure measurement circuitry (3).

The principle of work of the utility model is as follows: by after the blast situation in pressure measurement circuitry (3) the detecting circuit detection signal being delivered in the main PID controller (11), wherein this main PID controller (11) is controlled the rotating speed of blower fan (1), send a working signal simultaneously and instruct, control the rotating speed of blower fan (2) from movement controller (21) by this to from movement controller (21).

Wherein, the utility model also can be provided with principal and subordinate's switching device shifter where necessary, for example be main PID control on the blower fan (1), blower fan (2) is driven control, and also changeable one-tenth blower fan (1) is driven control, blower fan (2) is an ACTIVE CONTROL, so only is that circuit is comparatively complicated, but still can realizes.

The pattern that the utility model design focal point is to have adopted in the parallel running blower fan main PID controller instruction to carry out work accordingly from movement controller makes from movement controller and follows the tracks of main PID controller operation, has guaranteed the normal operation of parallel fan.

The above, it only is the preferred embodiment of the fan frequency conversion governing system of a kind of parallel running of the utility model, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.

Claims

1, a kind of fan frequency conversion governing system of parallel running, comprise a plurality of blower fans that are arranged in parallel, it is characterized in that: be serially connected with a main PID controller therein on the blower fan, and all be connected in series on remaining blower fan one according to main PID controller instruction works from movement controller, this main PID controller with electrically connect from movement controller, give from movement controller by this main PID controller transportation work signal instruction, make from movement controller and follow the tracks of main PID controller operation; This main PID controller is electrically connected with pressure measurement circuitry on the line in parallel, controls rotation speed of fan with the detection signal that receives pressure measurement circuitry.