CN2632937Y

CN2632937Y - Voltage and frequency variable speed adjuster of high voltage motor

Info

Publication number: CN2632937Y
Application number: CN 03251855
Authority: CN
Inventors: 张文海; 王德武; 张环宇
Original assignee: CHANGCHUN ERA NEW MACHINERY AND ELECTRICITY TECHNOLOGY Co Ltd
Current assignee: CHANGCHUN ERA NEW MACHINERY AND ELECTRICITY TECHNOLOGY Co Ltd
Priority date: 2003-08-01
Filing date: 2003-08-01
Publication date: 2004-08-11
Anticipated expiration: 2013-08-01

Abstract

The utility model relates to a high pressure electromotor transform and frequency control speed regulator. The utility model relates to an improved frequency control speed regulator and is characterized in that a transform frequency converter 6000V to 3464 V phase shifting transformer is arranged between a power supply and an asynchronous motor, and a frequency converter power unit is adopted to change the Y wiring of the asynchronous motor into a delta wiring. The beneficial effects of the utility model are: only by changing the wiring to shift 6000 V wire voltage into a 3464 V wire voltage, and the phase shifting voltage into the step down transformer; in the way the input voltage of the frequency power unit is reduced, and the power unit number is correspondingly lowered, as well as the one third of the construction cost of the frequency converter, and at the same time electricity saving effect is maintained.

Description

High-tension motor variable voltage variable frequency speed regulator

Technical field:

The utility model belongs to line load power-saving technique field, relates to a kind of improvement of RHVC.

Background technology:

At present, the supporting motor of blower fan, pump machines in enterprises such as oil, chemical industry, generating, metallurgy, cement, mines mostly is 6KV/Y wiring mouse-cage type high-tension motor, and its energy conservation potential is very big.

And this line load being realized economize on electricity by frequency control, its technical performance, degree of regulation, power savings are very tangible, also are that traditional mode of speed regulation is incomparable.Existing frequency converter such as high-voltage large-power frequency convertor without power network pollution (patent No.: 97100477.3) employed all is high---high scheme (is the 6KV input, 6KV exports) or high---low---high scheme (input side dress 6KV/380V step-down transformer, join low-tension transformer, outlet side dress 380V/6KV step-up transformer, supply with motor), which kind of scheme no matter this frequency converter adopt, and all having a problem is that one-time investment is big, often is subjected to the sincere elbow of fund on promoting the use of.

Summary of the invention:

Problem to be solved in the utility model is;

A kind of simple in structure, little high-tension motor variable voltage variable frequency speed regulator of investment is provided.

The technical solution of the utility model is:

Seal in varying-voltage frequency converter 6000/3464V phase shifting transformer between power supply and asynchronous motor, transducer power unit is with the wiring of asynchronous motor Y wiring changing Δ.

The beneficial effects of the utility model are:

Application of electric motors Y wiring changes the Δ wiring, line drop is hanged down 1/1.732 principle, utilize original motor and loop thereof, only change its wiring and change 6000V line voltage into 3464V line voltage, and with phase shifting transformer as step-down transformer, reduced the input voltage of transducer power unit like this, the corresponding power cell number that reduced, can reduce by 1/3 frequency converter cost, keep the good advantage of power savings simultaneously again.

Description of drawings:

Fig. 1 is the high-voltage large-power frequency convertor without power network pollution topology diagram;

Fig. 2 is the utility model topology diagram;

Fig. 3 is the utility model transducer power unit circuit diagram;

Embodiment:

With phase shifting transformer as step-down transformer, change secondary side 3464V line voltage into by primary side 6000V line voltage, the wiring of motor Y wiring changing Δ, motor also changes the 3464V electricity consumption into by the 6000V electricity consumption like this, therefore, between phase shifting transformer and motor, only need three transducer power units of string to get final product.

Claims

1, a kind of high-tension motor variable voltage variable frequency speed regulator is characterized in that: seal in varying-voltage frequency converter 6000/3464V phase shifting transformer between power supply and asynchronous motor, transducer power unit is with the wiring of asynchronous motor Y wiring changing Δ.