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Geared Induction Motors Open Loop Commissioning

The Elevator Core drive can control Geared Induction Motors without an encoder module (Open Loop Feedback).

Below are the steps for commissioning the drive for a Geared Open Loop application:

Step 1 - Wiring Connections

For this guide it is assumed that the electrical wiring follows the default wiring example from below.

Figure 1. Default Wiring Configuration
Default Wiring Configuration

For full detail on electrical installation see the topic electrical installation.Electrical Installation - Whole System



Step 2 - Pre-Power Checks

Below are all the checks that must be preformed before applying any power to the drive.

Action/Checks

Danger_2.png

Do Not Apply Electrical Power Yet!

  • Check that all safety circuits/safety chains are in the correct state, failure to do so could result in damage to the equipment and possible injury or death.

  • Check that the intended voltage source matches that of the drive voltage rating.

  • Check that any unexpected movement in the motor will not result in damage to equipment / safety risk to persons.

  • Check that the elevator controller will not give a start signal to the drive when Electrical power is applied.

  • Ideally the Lift car should be balanced (i.e. with brakes off the lift car should not naturally move) and with enough shaft headroom to prevent reaching end stops during initial test travels.

Check all necessary electrical connections

  • Check Electrical Supply cables are connected to the Input power terminals of the drive.

  • Check Motor Cables are connected to the drive U, V, W terminals (If cables have identification markers connect correct phase sequence).

  • Check Brake resistor is connected to the “+DC” and “BR” terminals of the drive and that the resistance is higher than the minimum allowable value (as shown in the Drive Data topic) and resistor is suitably protected from Thermal Overload.

  • Check correct control connections are made between the Elevator Core control panel and the drive (For full detail on electrical installation see the topic electrical installation).Electrical Installation - Whole System

Step 3 - Apply Power

Action/Checks

Danger.png

Apply Electrical Power to the drive

  • Apply rated voltage to the drive.

  • Check that the drive displays Stop or Inhibit

  • Check that the Encoder module (Optional) left hand LED light is illuminated Red

Step 4 - Motor Nameplate Data Entry

Step 4 is entering the values from the motor nameplate into the parameters in Group 4.

Warning

This step is mandatory and each parameter needs to have the correct value. If these parameters are not entered or incorrect then the motor could be damaged.

Action

Parameter Change

Additional Information

Select Geared (Induction) motor control

  • Set P4-01 to 0

Some older motors may work better in simple vector mode. To do this set P4-01 to 1

Enter motor rated voltage (P4-02)

  • Enter value into P4-02

Enter Voltage value as shown on the motor nameplate (Volts).

Enter Motor Rated Current (P4-03)

  • Enter value into P4-03

Enter Current value as shown on the motor nameplate (Amps).

Enter Motor Rated Frequency (P4-04)

  • Enter value into P4-04

Enter Frequency value as shown on the motor nameplate (Hz).

Enter Number of Motor Poles (P4-05)

  • Enter value into P4-05

Enter motor pole value as shown on the motor nameplate, if unknown set P4-05 to 0 where the drive will automatically calculate the value providing P4-04 (Motor Rated Frequency) and P4-06 (Motor Rated Speed) have been entered correctly.

Enter Motor Rated Speed (P4-06)

  • Enter value into P4-06

Enter motor rated speed value as shown on the motor nameplate (rpm). The drive display will now show motor speed in estimated rpm. All speed related parameters, such as Minimum and Maximum Speed, High Speeds etc. will also be displayed in rpm.

This parameter must be entered to set 0 in Parameter P4-05 to auto calculate the number of motor poles.

If you want the drive to display the speed in Hz leave this parameter at 0.

Enter Motor power factor Cos Ø (P4-07)

  • Enter value into P4-07

Obtained from Motor nameplate.

If Motor power factor is unknown leave as default value and set P4-01 to 1.

The drive can auto calculate this value. When the motor is running, parameter P0-22 displays the measured power factor value, and this can then be entered into P4-07. The closer you run to rated speed and load the more accurate this measurement.

Enter the Maximum speed (P8-01)

  • Enter value into P8-01

This is the maximum allowable speed.

Step 5 - Motor Auto-tune

A Motor Auto-tune must be carried out in order to measure the motor electrical characteristics, brakes will be applied by the drive (unless controlled by other means) during this test.

Action/Check

Additional Information

Danger_2.png

System Check

  • If the motor contactor(s) are controlled by the elevator controller then they should be activated to close so that the motor is electrically connected to the drive, otherwise the “Auto-tune” cannot be carried out.

  • If the motor contactor(s) are controlled by the drive (connected to relay 1) the motor contactor will automatically be energised when the “Auto-tune” is enabled.

Note

For the motor contactor to close the safety chain will need to be closed. Unless using Macro 9 or Macro 11.

Safety Chain Check

  • Check Safe Torque off input connections have been made.

Geared_Comissioning_-_Geared_Closed_Loop_-_Safety_Chain.svg

To start the Auto-tune the Safety Chain inputs must be closed (STO1 & STO2).

You are able to pre-load the Auto-tune in P4-08 while the drive shows inhibit (Safety Chain open), so as soon as the Safety Chain close.

Note

The STO input status can be viewed in parameter P0-03 (0 = Open 1 = Closed).

Enable Auto-tune

  • Set P4-08 to a 1 and press the NAVIGATE button.

Elevator_Core_Size_2_navigate_button.eps

Auto-tune Sequence

  1. The motor contactors will close (if controlled by the drive through Relay 1 with P1-30 set to 11.

  2. The Motor brake will remain applied if connected to Relay 2.

  3. The display will show Auto-t. This display indicates that the Auto-tune is in progress.

  4. Once the Auto-tune is completed P4-08 will return to 0 and the display will show Stop (P4-24 through to P4-28 will be populated) and the Motor contactors (Relay 1) will open.

Note

If the drive trips refer to the Troubleshooting topic.

Note

The Motor Auto-tune will need to be repeated if the motor, motor cables, motor parameters or drive control mode is changed in P4-01.

Step 6 - First run of the Elevator

This step details the procedure to run the elevator car for the first time.

Action/Check

Guidance

  • Check for Suitable travel headroom

Ideally the Lift car should be balanced (i.e. with brakes off, the lift car should not naturally move) and with enough shaft headroom to prevent reaching end stops during initial test travels.

  • Run the elevator at reduced speed

Steps to run the elevator at a reduced speed

  1. Close STO1 & STO2 inputs and the drive should show Stop.

    Geared_Comissioning_-_Geared_Closed_Loop_-_Inspection_Speed.svg
    Geared_Comissioning_-_Geared_Closed_Loop_-_Stop_Display.svg

  2. Provide a reduced speed reference to the drive. This value is normally around 10% of the maximum running speed of the elevator.

    This can be done with either of the 2 methods listed below:

    • Inspection speed terminal can be used. If P1-02 is at default value (P1-02=1) then inspection speed is defined in parameter P8-08, in this case inspection speed is selected when DI6 is high.

      Geared_Comissioning_-_Geared_Closed_Loop_-_Inspection_Speed.svg

    • Alternatively, the maximum speed parameter (P8-01) can be used to limit the maximum speed reference.

  3. Provide a run-direction command to the drive.

    Geared_Comissioning_-_Geared_Closed_Loop_-_Run_Command.svg

Note

If the drive trips refer to the Troubleshooting topic.

  • If no problems are encountered then the lift can now be run normally

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