CN110429602A - A kind of array tuned method - Google Patents

Abstract

The present invention discloses a kind of array tuned method, by m capacity be C1 capacitor and n capacity be C2 capacitor parallel connection obtain 1 equivalent capacity C, equivalent capacity C=mC1+nC2, if capacitor C1 be greater than C2, obtain the smallest capacitance error be △ C=C1-C2.By using the method for the present invention, circuit can be made to be in threshold oscillation state, greatly save the energy for country, and be easy to produce in enormous quantities and apply simultaneously.

Description

A kind of array tuned method

Technical field

The present invention relates to energy-saving consumption-reducing field technologies, refer in particular to a kind of array tuned method.

Background technique

Motor at runtime, in order to realize energy-saving consumption-reducing, uses following three kinds of methods at present:

Method A: in Fundamental Theory of Electrical Engineering, if it is desired to which an asynchronous motor operates in optimum state, then must be added to compensation electricity Hold (as shown in Figure 1), in this way could be that country saves the energy and reduces useless reactive loss, but the production technology of capacitor limits Made compensation precision, the elementary error of capacitor between 10%-20%, and motor reactive loss also only have 30% or so, so most More are saved 10%.

Method B: being simplified to one phase equivalent circuit for the circuit structure in Fig. 1, then obtain circuit structure as shown in Figure 2, Here it is a typical antiresonant circuits, can be obtained according to antiresonant circuit formula: Ζ=(R+j ω L) (- j/ ω C)/(R+ j ω L-j/ ω C)

≈ j ω L(-j/ ω C)/(R+ j ω L-j/ ω C)

=L/C/ R+ j(ω L-1/ ω C) }；

Because of ω L-1/ ω C ≈ 0, | Z |=L/RC.

I.e. parallel resonance when, load circuit impedance is equivalent to infinite amplification, that is to say, that total current can reduction at double, electricity The a large amount of power saving in road, but the dynamics for being transmitted to load will not reduce.

Method C: if to meet method A and method B, circuit structure as shown in Figure 3 is obtained, motor needs are mixed One three variable capacitance, thus may be implemented maximum energy-saving, but this there has been a problem again, if variable capacitance is matched The motor of one 7.5KW, it may be necessary to house is so big, also wants selective gear, high-voltage isulation driving etc., theoretical feasible, but It can not the marketization.

Therefore, it is necessary to study a kind of methods to solve the above problems.

Summary of the invention

In view of this, in view of the deficiencies of the prior art, the present invention aims to provide a kind of array tuned sides Method greatly can save the energy for country, and be easy to produce in enormous quantities and apply simultaneously.

To achieve the above object, the present invention is using following technical solution:

A kind of array tuned method, by m capacity be C1 capacitor and n capacity be C2 capacitor parallel connection obtain 1 equivalent electricity Hold C, equivalent capacity C=mC1+nC2, if capacitor C1 is greater than C2, obtaining the smallest capacitance error is △ C=C1-C2.

The present invention has obvious advantages and beneficial effects compared with the existing technology, specifically, by above-mentioned technical proposal Known to:

By using the method for the present invention, circuit can be made to be in threshold oscillation state, greatly save the energy for country, and simultaneously easily In mass production and application.

In order to explain the structural features and functions of the invention more clearly, come with reference to the accompanying drawing with specific embodiment to this hair It is bright to be described in detail.

Detailed description of the invention

Fig. 1 be in the prior art motor running when realize energy-saving consumption-reducing electrical block diagram；

Fig. 2 be in the prior art motor running when realize energy-saving consumption-reducing another electrical block diagram；

Fig. 3 be in the prior art motor running when realize energy-saving consumption-reducing another electrical block diagram；

Fig. 4 is the electrical block diagram of the preferred embodiments of the invention.

Specific embodiment

Present invention discloses a kind of array tuned methods, as shown in figure 4, by m capacity be C1 capacitor and n capacity be The capacitor parallel connection of C2 obtains 1 equivalent capacity C, equivalent capacity C=mC1+nC2, if capacitor C1 is greater than C2, obtains the smallest capacitor Error is △ C=C1-C2.

According to above-mentioned formula, the precision-matched of large area can be realized with plate easy way with open-and-shut item number, it is false If doing the matching of 100KW, capacitor uses star connection, and capacitor is 3.3 μ F with 4.3 μ F, then obtaining minimum mismatch error is 1 μ F, I.e. 220²/ 3183*173=263Var, compared to 263/100000 ≈ 0.26% of general power.

It can be seen that circuit is in threshold oscillation state, the energy greatly is saved for country, and it is raw to be easy to high-volume simultaneously It produces and applies.

The technical principle of the invention is described above in combination with a specific embodiment.These descriptions are intended merely to explain of the invention Principle, and shall not be construed in any way as a limitation of the scope of protection of the invention.Based on the explanation herein, the technology of this field Personnel can associate with other specific embodiments of the invention without creative labor, these modes are fallen within Within protection scope of the present invention.

Claims (1)

1. a kind of array tuned method, it is characterised in that: by m capacity be C1 capacitor and n capacity be C2 capacitor it is in parallel 1 equivalent capacity C, equivalent capacity C=mC1+nC2 are obtained, if capacitor C1 is greater than C2, obtaining the smallest capacitance error is △ C=C1- C2。