CN204013185U

CN204013185U - A kind of medium-high voltage frequency converter

Info

Publication number: CN204013185U
Application number: CN201420420201.2U
Authority: CN
Inventors: 周旭旺
Original assignee: ZHEJIANG AEROSPACE SHENZHOU ELECTRIC CONTROL TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG AEROSPACE SHENZHOU ELECTRIC CONTROL TECHNOLOGY Co Ltd
Priority date: 2014-07-29
Filing date: 2014-07-29
Publication date: 2014-12-10
Anticipated expiration: 2024-07-29

Abstract

The utility model discloses a kind of medium-high voltage frequency converter, comprise bypass cabinet, transformer case, power cabinet and control cubicle, in bypass cabinet, be provided with multiple manual bypass and multiple auto by pass, in transformer case, be provided with phase shifting transformer, the secondary of phase shifting transformer comprises that 24 are paid limit winding, in power cabinet, be provided with 24 power cells, wherein every 8 power cells form a phase, 24 power cells are paid limit winding corresponding being connected one by one with described 24, described 24 power cells in power cabinet are also connected with described control cubicle simultaneously, also comprise heat abstractor, heat abstractor respectively with described bypass cabinet, transformer case, power cabinet and control cubicle are connected.The beneficial effects of the utility model are, the utility model provides a kind of medium-high voltage frequency converter, and this frequency converter has advantages of that interchangeability is good, easy to maintenance, noise is low, harmonic content is little and can not cause motor torque ripple.

Description

A kind of medium-high voltage frequency converter

Technical field

The utility model relates to converter technology field, particularly relates to a kind of medium-high voltage frequency converter.

Background technology

Frequency converter VFD (Variable-frequency Drive) is application converter technique and microelectric technique, controls the Electric Drive element of alternating current motor by changing the frequency of machine operation power supply and the mode of amplitude.Frequency converter is integrated high-voltage high-power transistor technology and electron controls technology, be used widely.The effect of frequency converter is frequency and the amplitude that changes alternating current machine power supply, thereby changes the cycle of its moving magnetic field, reaches the object of level and smooth control motor speed.The appearance of frequency converter, complicated speed regulating control is simplified, with frequency converter+mouse cage AC formula induction motor combination replacement most of work that originally can only complete with direct current machine, dwindled volume, reduce maintenance rate, made drive technology develop into the new stage.Present frequency converter interchangeability is poor, maintenance is difficult for, and noise is high, and harmonic content is larger, easily causes the torque pulsation of motor.

Utility model content

For solving the problems of the technologies described above, the utility model provides that a kind of interchangeability is good, easy to maintenance, noise is low, harmonic content is little and can not cause the medium-high voltage frequency converter of motor torque ripple.

Of the present utility model, comprise bypass cabinet, transformer case, power cabinet and control cubicle, in described bypass cabinet, be provided with multiple manual bypass and multiple auto by pass, in described transformer case, be provided with phase shifting transformer, described bypass cabinet is connected with the described phase shifting transformer in described transformer case with described auto by pass by described manual bypass respectively, the secondary of described phase shifting transformer comprises that 24 are paid limit winding, in described power cabinet, be provided with 24 power cells, wherein every 8 power cells form a phase, described 24 power cells are paid limit winding corresponding being connected one by one with described 24, described 24 power cells in described power cabinet are also connected with described control cubicle simultaneously, also comprise heat abstractor, described heat abstractor respectively with described bypass cabinet, transformer case, power cabinet and control cubicle are connected.

Optionally, described multiple manual bypass are 3 manual bypass, and described multiple autos by pass are 3 autos by pass.

Compared with prior art the beneficial effects of the utility model are: the utility model provides a kind of medium-high voltage frequency converter, all power models are made into unified unit by this frequency converter, greatly improve interchangeability, easy to maintenance, and agent structure forms by organizing power unit cascade more, thereby produce by each group of low pressure stack the High voltage output needing, it is little to harmonic pollution in electric power net, Harmonics of Input distortion is less than 3%, the harmonic distortion of electrical network input voltage is less than 1.5%, the harmonic wave that directly meets IEEE518-1882 suppresses standard, input power factor is high, needn't adopt input harmonics filter and power factor compensation device, output waveform quality is good, and output current harmonics distortion is less than 2%, and the problems such as the additional heating of motor that does not exist harmonic wave to cause and torque pulsation, noise, output dv/dt, common-mode voltage, needn't add output filter, just can use common asynchronous machine.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.

As shown in Figure 1, comprise bypass cabinet 1, transformer case 2, power cabinet 3 and control cubicle 4, in described bypass cabinet, be provided with multiple manual bypass 8 and multiple auto by pass 9, in described transformer case 2, be provided with phase shifting transformer 5, described bypass cabinet 1 is connected with the described phase shifting transformer 5 in described transformer case with described auto by pass 9 by described manual bypass 8 respectively, the secondary of described phase shifting transformer 5 comprises that 24 are paid limit winding 6, in described power cabinet, be provided with 24 power cells 7, wherein every 8 power cells form a phase, described 24 power cells are paid limit winding corresponding being connected one by one with described 24, described 24 power cells in described power cabinet are also connected with described control cubicle simultaneously, also comprise heat abstractor 10, described heat abstractor respectively with described bypass cabinet, transformer case, power cabinet and control cubicle are connected, all power models are made into unified unit by this frequency converter, greatly improve interchangeability, easy to maintenance, and agent structure forms by organizing power unit cascade more, thereby produce by each group of low pressure stack the High voltage output needing, it is little to harmonic pollution in electric power net, Harmonics of Input distortion is less than 3%, the harmonic distortion of electrical network input voltage is less than 1.5%, the harmonic wave that directly meets IEEE518-1882 suppresses standard, input power factor is high, needn't adopt input harmonics filter and power factor compensation device, output waveform quality is good, and output current harmonics distortion is less than 2%, and the problems such as the additional heating of motor that does not exist harmonic wave to cause and torque pulsation, noise, output dv/dt, common-mode voltage, needn't add output filter, just can use common asynchronous machine

As the preferred implementation of the utility model embodiment, described multiple manual bypass are 3 manual bypass, and described multiple autos by pass are 3 autos by pass.

The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection range of the present utility model.

Claims

1. a medium-high voltage frequency converter, it is characterized in that, comprise bypass cabinet, transformer case, power cabinet and control cubicle, in described bypass cabinet, be provided with multiple manual bypass and multiple auto by pass, in described transformer case, be provided with phase shifting transformer, described bypass cabinet is connected with the described phase shifting transformer in described transformer case with described auto by pass by described manual bypass respectively, the secondary of described phase shifting transformer comprises that 24 are paid limit winding, in described power cabinet, be provided with 24 power cells, wherein every 8 power cells form a phase, described 24 power cells are paid limit winding corresponding being connected one by one with described 24, described 24 power cells in described power cabinet are also connected with described control cubicle simultaneously, also comprise heat abstractor, described heat abstractor respectively with described bypass cabinet, transformer case, power cabinet and control cubicle are connected.

2. medium-high voltage frequency converter as claimed in claim 1, is characterized in that, described multiple manual bypass are 3 manual bypass, and described multiple autos by pass are 3 autos by pass.