The application of PI500 inverter in industrial centrifuges

The application of PI500 inverter in industrial centrifuges

    Centrifuge as one of the important industrial production equipment widely used in food, chemical, pharmaceutical and other industries, it will mainly by centrifugal force role solid-liquid separation, generally by feeding, washing, dehydration, scraper, discharge of several parts.The principle of centrifugal separator is centrifugal filtration and centrifugal sedimentation.Centrifugal filtration is to make suspending liquid centrifugal pressure generated in a centrifugal force field, the effect on the filter medium, make the liquid through a filter medium filtrate, and solid particles trapped in the filter medium surface, so as to realize the liquid - solid separation;Centrifugal sedimentation is the use of suspension (or emulsion) density of different components in the centrifugal field the principle of rapid subsidence in the layered implementation liquid - solid (or liquid-liquid separation, centrifuge according to the discrete structure and horizontal two kinds.

                                                 离心机1.png 
Vertical centrifuge
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 Horizontal centrifuge


    Characteristics and requirements of centrifuge work

    2.1The centrifuge is a large inertial load, which must overcome the phenomenon of overloading and deceleration

    2.2The centrifuge load has a high torque, to making sure the starting is stable, the low frequency torque is large, and the parking is not coasting.

    2.3There are two reliable braking modes with dc braking and energy consumption braking, which can make the centrifuge stop reliably and reliably during the specified time. 

    Principle of the application of centrifuge frequency inverter

    Centrifuge is one of the main equipment in chemical industry, the use of frequency inverter to control the operation of the motor, the motor starting smoothly, limit the starting current of the motor, under the premise of the normal operation of equipment, provide a better protection to the motor



    Features of PI500 and PI9000 series inverters

    DSP is used as the core control unit to realize high speed high performance control.Three speed control methods: V/F control, no PG vector control, and PG vector control. Support the vector control of asynchronous motor and permanent magnet synchronous motor, accurate motor parameter self-learning.Under the non-inductive vector, the torque output of 0.5hz /150% can be realized, with low torque and low torque ripple.Simple PLC function can achieve up to 16 speed control.Advanced thermal management, independent air duct design, adapt to 40  environment temperature, can discharge type fan, easy installation and maintenance.The built-in 485 communication interface, easy-to-use upper computer software, the realization of networked communication with the upper computer, support for a variety of communications.Three anti-coating coating, suitable for all kinds of bad environment.

    Site application examples and pictures

5.1 
example 1

    The site is a production down  feather enterprise, the equipment is the down  feather washing and dehydration equipment (centrifuge), the equipment motor is 22KW using POWTRAN PI500 series inverter.

MODEL

PI500 022G3

Series No.

 

Application

centrifuge

Motor rating frequency

50Hz

Power

22kw

Motor rating current

43.8A

Rating volt

380v

Motor rating RPM

970Rr/min

Working volt

380v

Inverter working current

43A

frequency

20,50Hz

IGBT working temp.

53

power grid

380v

DC modus voltage fluctuate

NO

grounding

NO

Inverter working model

continuous working



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5.2.example 2

    The site is a sugar producing enterprise, the equipment is a centrifuge, the centrifuge is used in the sugar water separation, the equipment motor is 75KW, for the PI500 series inverter

MODEL

PI500 022G3

Series No.

 

Application

centrifuge

Motor rating frequency

50Hz

Power

75kw

Motor rating current

150A

Rating volt

380v

Motor rating RPM

970Rr/min

Working volt

393v

Inverter working current

96-130A

frequency

45-50Hz

IGBT working temp.

55

power grid

380v

DC modus voltage fluctuate

NO

grounding

separation

Inverter working model

continuous working


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 Upper suspended intermittent centrifuge

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Continuous centrifuge

    PI500 and PI9000 series frequency inverter function is stable and reliable, which makes it successful and a lot of application in the centrifuge industry, and achieved the desired effect.




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