Abstract: Washing machine is important equipment in garment factory, washing plant, mining company, schools, hotels and hospitals. It can improve working efficiency and reduce the labor cost. Keeping the stability of the control system and drive system is very important. This article will introduce an application of INVT inverter Goodrive200A used on washing machine, which is very popular in Indonesia market. This application proved the stable solution of INVT.
Keywords: Goodrive200A, frequency inverter, washing machine
About the industry washing machine, there are 2 main parts: electrical system and mechanical system, this article introduces the design scheme and the hardware structure of the electric-drive control system.
Figure 1 Structure of washing machine
2. Main part list:
|Drive||GD200A-011G/015P-4||To drive the roller motor, receive the start/stop signal and speed signal from controller|
|PLC||IVC1-1614MAR1||Mange the entire control system, monitor the feedback signal from side equipments and output the single to operate solenoid valves, adjust the running speed of roller|
|Motor||7.5kW/380V/60Hz/1750rpm/14.4A||Drive the roller for washing|
Generally there are 4 steps in the washing process: soaking / washing/ drainage / dehydration.
a.Soaking: After users put the cloths or hotel supplies to the roller, lock the door, select the suitable program and press the START button, the PLC will operate the inlet values to let the water and detergent into the roller. At the same time, output a running command to start the inverter, and rotate the roller at a low speed 2Hz/70rpm, keep the running direction positive or reverse moving in circles.
b.Washing: After the setting time(about 10 minutes), PLC will increase the output analog signal, keep the motor running at 10.7Hz/375rpm, keep the running direction forward or reverse moving in circles.
c.Drainage: After the setting time (Can be adjusted by HMI), operate the drain value to drain the water,
d.Dehydration: PLC will increase the output analog signal, keep the motor running at 146.3Hz/5120rpm, in order to clean the water by centrifugal force.
◆ Adopt INVT PLC and inverter on the washing machine, the effect is very clear:
◆ Reduce the surge current and make the motor running process are more smooth.
◆ Improve the speed control performance, more accurate.
◆ Increase the maximum speed up to 5120rpm, about 3 times of the motor rated speed 1750rpm.
◆ Frequent acceleration and deceleration, the positive and reverse switch without fault;
◆ Sensor-less vector control, keep the output torque at low frequency.
◆ Reduce the maintenance of the speed adjustment mechanism.
◆ Set the washing process and program the PLC is easier.
◆ Reduce the wiring, more clear to maintain
Figure 2 Circuit diagram of inverter
|P00.00||Speed control mode||P01.08||Stop selection|
|P00.01||Run command channel||P05.01||S1 terminal function|
|P00.03||Max. frequency||P05.02||S2 terminal function|
|P00.04||Upper limit frequency||P05.03||S3 terminal function|
|P00.05||Lower limit frequency||P05.33||AI lower limit|
|P00.06||Frequency command||P05.35||AI upper limit|
|P00.11||ACC time||P06.03||Output relay 1 function|
|P00.12||DEC time||P10.04||Multi-step speed 1|
Washing machine figure:
For industry washing machine, INVT Goodrive 200A shows us a excelent performance, it proves that GD200A can meet the requirement, and realize the stable and reliable characteristic. Based on the advantages, INVT industrial washing solution has been widely used successfully in Indonesia, China and other countries.
 Operation manual of Goodrive200A inverter of Shenzhen INVT Electric Co., Ltd.