CN202856602U

CN202856602U - Frequency converter

Info

Publication number: CN202856602U
Application number: CN 201220548839
Authority: CN
Inventors: 晋高峰; 付天祥; 项潇逸; 郑军
Original assignee: UPSUN INDUSTRIAL GROUP Co Ltd
Current assignee: UPSUN INDUSTRIAL GROUP Co Ltd
Priority date: 2012-10-24
Filing date: 2012-10-24
Publication date: 2013-04-03
Anticipated expiration: 2022-10-24

Abstract

The utility model provides a frequency converter, which comprises a driving circuit and a main control circuit. A connection terminal, an IGBT rectifier module, a switching power supply protection module, a transformer module, an optocoupler driving module, an IGBT driving module and a Hall current detection module are electrically connected in sequence to form the driving circuit. The main control circuit comprises a current detection loop module, a signal conversion module, a signal control module, a multifunctional terminal control module and a secondary wiring control module which are electrically connected in sequence. A display control module is connected with a chip control module, the chip control module is connected with the current detection loop module, and an output end of the Hall current detection module of the driving circuit is connected with an input end of the current detection loop module of the main control circuit. The frequency converter provided by the utility model strengthens the current detection capacity through the Hall current detection module and the current detection loop module.

Description

Frequency converter

Technical field

The utility model relates to a kind of frequency converter.

Background technology

Along with developing rapidly of modern power electronics technology and Computer Control Technology, promoted the technological revolution of electric drive.AC speed regulating replaces DC speed regulation, and computer numerical control (CNC) replaces simulation control has become development trend.Ac motor speed control by variable frequency is current saves energy, improves the technological process of production, improve the quality of products, and a kind of Main Means that improves running environment.Frequency control is with its high efficiency, High Power Factor, and excellent speed governing and open the plurality of advantages such as braking ability and be known as the most rising mode of speed regulation both at home and abroad, but have the output error that frequency converter need to cause easily to the detection inaccuracy of size of current frequency converter now.

The utility model content

For above-mentioned deficiency, the purpose of this utility model provides a kind of frequency converter that can accurately detect electric current.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of frequency converter; it comprises drive circuit and governor circuit; described drive circuit comprises binding post; described drive circuit also comprises the Switching Power Supply protection module; transformer module; the optocoupler driver module; IGBT driver module inverter circuit and Hall current detection module; described IGBT driver module inverter circuit comprises IGBT rectification module and IGBT driver module; described binding post; the IGBT rectification module; the Switching Power Supply protection module; transformer module; the optocoupler driver module; the IGBT driver module is electrically connected successively with the Hall current detection module; described governor circuit comprises the current detection circuit module; display control module; chip control module; the signal controlling module; the secondary connection control module; signal conversion module and multifunction terminal control module; described current detection circuit module; signal conversion module; the signal controlling module; the multifunction terminal control module; the secondary connection control module is electrically connected successively; described display control module is connected with chip control module; chip control module is connected with the current detection circuit module, and the output of the Hall current detection module of described drive circuit is connected with the input of the current detection circuit module of governor circuit.

Be provided with piezo-resistance high voltage protective module between described binding post and the IGBT rectification module.

Be provided with Absorption Capacitance protective circuit module between described IGBT rectification module and the Switching Power Supply protection module.

Be provided with filter circuit module between described Absorption Capacitance protective circuit module and the Switching Power Supply protection module.

Be provided with filter circuit module between described IGBT rectification module and the Switching Power Supply protection module.

The beneficial effects of the utility model are by the control of Hall current detecting sensor and chip, to strengthen the detectability to electric current.

Description of drawings

Accompanying drawing 1 is the structural representation of drive circuit of the present utility model.

Accompanying drawing 2 is structural representations of governor circuit of the present utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

Referring to Fig. 1 and Fig. 2; the utility model comprises drive circuit and governor circuit; described drive circuit comprises binding post 1; described drive circuit also comprises Switching Power Supply protection module 4; transformer module 5; optocoupler driver module 6; IGBT driver module inverter circuit and Hall current detection module 7; described IGBT driver module inverter circuit comprises IGBT rectification module 2 and IGBT driver module 3; described binding post 1; IGBT rectification module 2; Switching Power Supply protection module 4; transformer module 5; optocoupler driver module 6; IGBT driver module 3 is electrically connected successively with Hall current detection module 7; described governor circuit comprises current detection module 8; display control module 14; chip control module 13; signal controlling module 10; secondary connection control module 12; signal conversion module 9 and multifunction terminal control module 11; described current detection circuit module 8; signal conversion module 9; signal controlling module 10; multifunction terminal control module 11; secondary connection control module 12 is electrically connected successively; described display control module 14 is connected with chip control module 13; chip control module 13 is connected with current detection circuit module 8, and the output of the Hall current detection module 7 of described drive circuit is connected with the input of the current detection circuit module 8 of governor circuit.

The binding post 1 of drive circuit receives alternating current; then by piezo-resistance high voltage protective module 15; this module is to its protective effect of whole drive circuit; prevent that external voltage is excessive; thereby puncture whole circuit; after piezo-resistance high voltage protective module 15; be input to the IGBT rectification module 2 of IGBT driver module inverter circuit; input voltage is carried out rectification; after over commutation, be input to again Absorption Capacitance protective circuit module 16; by the absorption of capacitor to sharp wave; further input current is carried out rectification; then voltage is input to filter circuit module 17; by a plurality of electrochemical capacitors electric current is carried out filtering; again filtered voltage is input to Switching Power Supply protection module 4; by being input to again transformer module 5 after this module; then be input to optocoupler driver module 6; optocoupler driver module 6 drives IGBT driver module 3 work of IGBT driver module inverter circuit; be input to again Hall current detection module 7; input current is detected; be input to afterwards the current detection circuit module 8 of governor circuit; this module is by chip control module control 13; chip control module 13 is directly set desired parameters by display control module 14; display control module 14 setup parameters are to chip control module 13; chip control module 13 is controlled current detection circuit module 8 and is carried out current detecting according to the value of setting; to detect qualified electric current and be input to signal conversion module 9; signal conversion module 9 output signals are to signal controlling module 10; signal controlling module 10 is directly controlled multifunction terminal control module 11, selects output by 11 pairs of secondary connection control modules 12 of Multifunctional control module.

Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection range of the present utility model.

Claims

1. frequency converter; it comprises drive circuit and governor circuit; described drive circuit comprises binding post (1); it is characterized in that: described drive circuit also comprises Switching Power Supply protection module (4); transformer module (5); optocoupler driver module (6); IGBT driver module inverter circuit and Hall current detection module (7); described IGBT driver module inverter circuit comprises IGBT rectification module (2) and IGBT driver module (3); described binding post (1); IGBT rectification module (2); Switching Power Supply protection module (4); transformer module (5); optocoupler driver module (6); IGBT driver module (3) is electrically connected successively with Hall current detection module (7); described governor circuit comprises current detection circuit module (8); display control module (14); chip control module (13); signal controlling module (10); secondary connection control module (12); signal conversion module (9) and multifunction terminal control module (11); described current detection circuit module (8); signal conversion module (9); signal controlling module (10); multifunction terminal control module (11); secondary connection control module (12) is electrically connected successively; described display control module (14) is connected with chip control module (13); chip control module (13) is connected with current detection circuit module (8), and the output of the Hall current detection module (7) of described drive circuit is connected with the input of the current detection circuit module (8) of governor circuit.

2. frequency converter according to claim 1 is characterized in that: be provided with piezo-resistance high voltage protective module (15) between described binding post (1) and the IGBT rectification module (2).

3. frequency converter according to claim 1 is characterized in that: be provided with Absorption Capacitance protective circuit module (16) between described IGBT rectification module (2) and the Switching Power Supply protection module (4).

4. frequency converter according to claim 3 is characterized in that: be provided with filter circuit module (17) between described Absorption Capacitance protective circuit module (16) and the Switching Power Supply protection module (4).

5. frequency converter according to claim 1 is characterized in that: be provided with filter circuit module (17) between described IGBT rectification module (2) and the Switching Power Supply protection module (4).