Stock code:SZ 002334
Current location:Home Solutions HVAC
HVAC
Screw Air Compressor Case in Israel - INVT Goodrive 300-01 Series Inverter
Click amount:
Abstract: This paper introduces the feature of screw air compressor, INVT Goodrive300-01 series special inverter for compressor, and the successful application in Israel.
Key words: screw air compressor, Goodrive300-01, PID, constant pressure

1.Foreword
A rotary-screw compressor is a type of gas compressor which is based on a rotary-type positive-displacement mechanism. It is commonly used to replace piston compressors in either large industrial applications or high-power air tools where large volume of high-pressure air is needed. The traditional pressure control method is loading or unloading, which causes pressure fluctuation, energy waste. The use of frequency inverter for constant pressure control is the current mainstream.

Fig.1 Working process of screw air compressor

2.System requirements
The Israeli air compressor factory has more than three decades of experience in the design and production of air compressors.Their technical requirements are as follows:
(1) Built-in PID function:
1) Preset a pressure value on HMI so that the inverter automatically can adjust the speed according to the feedback pressure to make the pressure constant.
2) No controller needed.
(2) Valve control:
If measured pressure<setting pressure(8.5bar), the inlet valve opens;
If measured pressure≥9 bar, the inlet valve closes;
(3) Sleep mode:
If the inlet valve is closed, set pressure(8.5bar)≤measured pressure<9 bar.After 120 seconds delay time, inverter sleep.
(4) Cooling fan control:
Be able to measure the temperature of compressor, if temperature ≥80℃, start the cooling fan, if temperature <75℃, stop the cooling fan.
(5) Over pressure protection:
≥10 bar, display alarm on HMI, continue to work
≥10.5 bar,  display alarm on HMI, shut down
(6) Over heat protection:
≥98℃, display alarm on HMI, then continue to work.
≥105℃, display alarm on HMI, then shut down.
(7) Maintenance time alarm:
Be able to set maintenance time, alarm when it is reached
(8) Other protection:
Pressure sensor disconnected alarm, temperature sonsor disconnected alarm, Emergency stop etc.
(9) GD300-01 series inverter + HMI meets all the requirements of customer.

3.System scheme

Fig.2 System diagram

Supplied list:

Type

Model

Remarks

Inverter

GD300-01-037G-4

Special inverter for compressor, integrated compressor control logic.

Standard power range is from 4kW to 315kW

HMI

VT series

Controlling and monitoring interface, different sizes are available

Pressure sensor

4~20mA, 24V

Hessman type, for air pressure measurement

Temperature sensor

PT100

For compressor temperature measurement

24V power supply

24V, 1A

Power supply for HMI


4.Parameters setting

Code

Description

Value

Remarks

P00.00

1.Vector control
2.V/f control

1

 

P00.01

Modbus control

2

 

P00.06

PID reference

7

 

P00.11

ACC time

10

 

P00.12

DEC time

10

 

P02.00

Motor type

0

0:Asynchronous motor
1:Synchronous motor

P02.01

Rated power of motor

kW

According to motor nameplate

P02.02

Rated frequency of motor

Hz

According to motor nameplate

P02.03

Rated speed of motor

rpm

According to motor nameplate

P02.04

Rated voltage of motor

V

According to motor nameplate

P02.05

Rated current of motor

A

According to motor nameplate

P05.01

S1 Emergency stop

9

 

P05.10

S1 Normally closed

1

0:  normally open
1: normally closed

P05.32

Lower limit of AI1 (pressure sensor)

2V

4~20mA correspond to 2~10V

P06.03

Valve control relay

27

RO1

P06.04

Fan control relay

28

RO2

P09.00

PID reference selection

10

Pressure reference from HMI

P09.02

PID feedback selection

8

Pressure feedback to AI1

P09.04

Kp of PID

20

 

P09.05

Ti of PID

2

 

P09.06

Td of PID

2

 

P09.09

PID output upper limit

100%

100% correspond to 50Hz

P09.10

PID output lower limit

60%

60% correspond to 30Hz

P18.00

Compressor mode enabled

1

0: disabled
1: enabled

P18.01

Sleep mode enabled

1

0: disabled
1: enabled

P18.02

Load/unload mode

0

0: Automatic open/close the valve
1:Manual control the valve

P18.03

Temperature signal

1

0: from analog input AI2
1: directly from PT100

P18.05

Valve close pressure

0.9 Mpa

 

P18.06

Valve open pressure

0.85 Mpa

 

P18.07

Setting pressure

0.85 Mpa

 

P18.08

Fan start temperature

80

 

P18.09

Fan stop temperature

75

 

P18.11

Lower limit frequency of valve open

30Hz

 

P18.12

Running frequency of valve closed

30Hz

 

P18.13

Sleep delay time

120 sec

 

P18.14

Stop delay time

15sec

 

P18.15

Valve open delay  time

1 sec

 

P18.16

Restart delay time

15 sec

 

P18.17

Alarm pressure

1Mpa

Display alarm on HMI, continue to work

P18.18

Shut down pressure

1.05Mpa

Display alarm on HMI, shut down



Related products recommended
Email: overseas@invt.com.cn
Learn more about latest solutions and cases, please enter your email address to subscribe to
Online top

Our site uses cookies to provide you with a better onsite experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy .