Electrical Control Techniques Simulator (EKTS) Documentation

Design command and motor circuits to run 3 units of 3 phase induction motors as specified below:

• First motor starts to rotate by pressing start button.
• After 5 seconds second motor starts to rotate.
• After 5 seconds as second motor runs third motor will start and first motor stops.
• Second and third motors will stop after 5 second work together.
• Al motors will stop by pressing stop button at any time.

This circuit is designed as shown in Figure 14.

Figure 15 3 units of 3 phase motor circuit designed with EKTS.

In this circuit “Z1” time relay is used to send pulse in every 5 second. “M1”, “M2” and “M3” relays are used to control 3 phase motors relatively. This relays are controlled by control circuit.

Design command and motor circuits to run two units of 3 phase and one unit 1 phase motors as specified below.

• 1 phase motor starts after 3 seconds as start button pressed.
• After 5 seconds as 1 phase motor runs both of 3 phase motors start.
• After 5 seconds as 3 phase motors start 1 phase motor and one of the 3 phase motors stop.
• Working 3 phase motor stops after 10 seconds.

This circuit is designed as shown in Figure 15.

Figure 16 Circuit of one 1 phase and two 3 phase motors designed with EKTS.

In this circuit “M1”, “M2” and “M3” relays used to control three motors. Control of this relays is done in command circuit.