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Mine Hoist Case - INVT Goodrive300-19 Series Inverter
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Abstract: This article analyzes operating characteristics of mine hoist, controlling difficulty and special requirement to inverter, introduce Goodrive300-19 series special inverter for crane, and advantage of Goodrive300-19 applied to mine hoist.
Key words: Goodrive300-19, low-voltage inverter, mine hoist, crane

1.Foreword
Hoist is one of the most important equipment in the mine. It can be used to lift waste rocks, coal and barren rocks out of the mine, and also used to transport persons, equipments and materials. There are some high requirements on the electric drive system of mine hoist, since the reliability of electric drive system not only affects production capacity of the mine, but also directly concerns the safety of all miners, and any failure of electric control equipment may result in personal injury or halt the normal production, therefore, it require mine hoist maintains smooth operation in four quadrants, supports frequent change in operating command, including forward rotation, reverse rotation, start, stop and brake, high overload capacity, high reliability for non-stop operation without fault.

Fig.1Hoist working diagram


2.Brief introduction of Goodrive300-19

Goodrive300-19 serial is special inverter for crane, which is researched and developed based on lifting load characteristics and controlling requirement.
AC 3PH 380V(-15%)~440V(+10%)
1.5~500kW (paralleled for higher power)
V/F and sensorless vector control (GD35-19 for closed-loop vector)
Mechanical brake control, pre-exciting and torque verification function for crane
Built-in dynamic braking unit up to 30kW
Support two groups of motor parameter
High overload capacity design: 150% 60s, 180% 10s, 200% 1s

Fig.2 Goodrive300-19 inverter


3.Project information

Customer

Heibei Wuan Coal Mine

Industry

Mining

Equipment

Hoist

Motor type

Asynchronous motor

Rated voltage

380V

Rated power

450kW

Rated frequency

50Hz

Rated current

844A

Rated speed

741rpm

Lifting speed

3.8m/s


4.Schematic diagram

Fig.3 Schematic diagram


5.Parameter setting

Function code

Set value

Description

P00.00

1

SVC Mode 1

P00.01

1

Terminal control

P00.06

13

Hierarchical multi-step speed reference

P00.11

20.0s

ACC time

P00.12

10.0s

Dec time

P02.01

450kW

Rated power of motor

P02.02

50Hz

Rated frequency of motor

P02.03

741rpm

Rated speed of motor

P02.04

380V

Rated voltage of motor

P02.05

844A

Rated current of motor

P02.06

0.004

Stator resistor

P02.07

0.002

Rotor resistor

P02.08

0.1

Leakage inductance

P02.09

2.4

Mutual inductance

P02.10

276.3

Non-load current

P05.01

1

Upward runFWD

P05.02

2

Downward runREV

P05.03

59

Brake feedback

P05.04

61

Hierarchical reference terminal 1

P05.05

7

Fault reset

P05.06

6

Coast to stop

P06.03

34

Brake relay output

P06.04

5

Fault relay output

P08.37

1

Dynamic braking enabled

P08.38

700.0V

Dynamic braking voltage threshold

P19.00

0

Common mode

P19.01

0x01

Brake controlled by inverter

P19.06

60%

Hierarchical multi-step speed reference 0

P19.07

100%

Hierarchical multi-step speed reference 1

P19.12

2Hz

Forward brake open frequency

P19.13

60%

Forward brake open current

P19.14

60%

Forward brake open torque

P19.15

2Hz

Reverse brake open frequency

P19.16

40%

Reverse brake open current

P19.17

40%

Reverse brake open torque

P19.18

3Hz

Forward brake open holding frequency

P19.19

0.2s

Brake open delay tim

P19.20

3Hz

Forward brake close frequency

P19.21

3Hz

Reverse brake close frequency

P19.22

3Hz

Brake close holding frequency

P19.23

0.3s

Brake close delay time

P19.24

1.0s

Brake feedback detection time


6.Site photos

Fig.4 Site photos


7.Conclusion

INVT Goodrive300-19 series is a high-performance vector control inverter, and it has been widely applied to crane, mine hoist as well as other equipments in hoist and lifting industry. When it is applied to the mine hoist, it achieves high-precision speed control and realizes safe and high-efficiency operation. There is no obvious mechanical shock when the mine hoist starts or stops, which greatly enhances the stability and comfortableness when the mine hoist is in operating status. Meanwhile, this application has also achieved good energy conservation effect, and it is the optimal choice for mine hoist transformation and upgrading.

Reference
[1] Goodrive300-19 Series open loop vector control inverter special for  crane,Shenzhen Invt Electric Co., Ltd. 2015.
[2] Hebei Wuan Coal Mine business trip report, Aftermarket unit of Invt, 2015
[3] Wu Hucheng, Pei Wenxi • Mine Transportation and Hoisting Equipments• China Coal Industry Publishing House • 2004 •
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