FELEVATOR

The FELEVATOR journal

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

Optimize your motor and inverter performance with our expert testing services: DC Link, Current Loop, and Zero Position Check. Ensure reliability and efficiency!

FELEVATOR3 min read
Read the article
CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check
The FELEVATOR journal

1. Inverter DC circuit inspection

The DC circuit test checks the voltage and functionality of the following components: SGRW, SH, input rectifier, braking chopper, braking resistor, and capacitor bank.

► AS.ESE panel: Set the following switches to the following positions:
– JRH to NORMAL
– JHM to RELEASED.
► Ensure the safety circuit is closed.
► HMI: Perform a DC link test.
HMI: Tests → VF test → DC link test → OK

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

2. Motor current loop check

The current loop test checks the following: motor circuit IGBTs, wiring from the FC to the MH, inductance, and load symmetry.

► Ensure the safety circuit is closed.
► HMI: Perform the current loop test.
HMI: Tests → VF test → Current Loop test → OK

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check


3. PM traction motor zero position check

- The zero-position test is only applicable to PM traction machines (synchronous models).
- Asynchronous traction machine names begin with "F". This test is not required for asynchronous traction machines.
- The zero-position test can detect discrepancies between the rotor position and the motor encoder position.

► Ensure the traction medium is not yet installed.
The motor will stArt for a few seconds during the zero-position test.
► Ensure that:
– The traction machine is of the synchronous type.
– The DC circuit test is completed.
– The current loop test is completed.
► AS. SCMAIN.ESE: Disconnect the recall control panel.

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position CheckWarn

During the motor zero-position check, the elevator car suddenly moved.

When checking the zero position of the PM traction motor, the motor rotated for several seconds. Therefore, if the traction media had already been installed for any reason, the elevator car could move upwards by more than two meters, posing a real risk of collision.

If testing is required with the traction media already installed, ensure that the elevator car is positioned at a distance greater than 3 meters below the top floor or machine room floor.

The described steps must be strictly followed to ensure the correct execution of the inspection procedure.

► AS.SCMAIN.ESE: Use the IMOF package to install the recall control panel onto the recall control plugin, as shown below.

IMOF plug - Identification number 57816206

AS.SCMAIN.ESE-HK

HK-[ESE+TSD]

TSD

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

1. AS – Control Cabinet                               2. AS.SCMAIN.ESE-HK – IMOF Connector
3. HK-[ESE+TSD] – IMOF Connector      4. TSD – IMOF Connector
5. ESE Panel                                                    6. AS – SCMAIN PCBA

► HMI: Set the installation and operation mode to MOF.
HMI: Command → Special Trips → MOF → ON → OK.
– HMI displays "Success".

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

► AS.ESE panel: Set the switch position to:
– JRH to INSPECTION.
► AS.SCMAIN.DEM/DRH: Ensure the LED on the DEM/DRH-E button is illuminated.

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

► HMI: Perform zero position test.
HMI: Tests → VFTest (Variable Frequency Drive Test) → ZeroPositionTst t3 → OK.
► HMI: Wait until the "Begin Test" message is displayed.
► AS.ESE panel: Press and hold the DRH-D or DRH-U button until the elevator car stops.
► In case of emergency, release the DRH-D or DRH-U button.
► AS.ESE panel: Release the DRH-D or DRH-U button.
► Wait 3...5 seconds.
► Repeat the last four steps until the HMI displays:

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

► MR.ACVF: Monitoring the status of the LED:

LED (color) state explanation
ERROR (red) OFF No fault
OK (green) ON All parameters are available.
PARAMETER (yellow) OFF Correct debugging

► HMI: Save changes using the "End Commission Command":
HMI: Commands → Drv End Commis → OK.

CO SC 1 Motor & Inverter Testing: DC Link, Current Loop & Zero Position Check

Then, the drive parameters are saved to the storage device.

► HMI: If the zero position test has been performed, please ensure that the parameter value is not zero.
HMI: Parameter → ACSyn Motor → ZeroPosition ≠ 0.

If the ZeroPosition value is 0, perform the zero-position test again.

► HMI: Adjusting the control clock date and time:
HMI: Parameters → System → Date.
Parameters → System → Time.

Working on a similar project?

Send a part number or photo. Our team can help with the next step.

Ask our team
Image detail

Share the part number, product photo, elevator model, and quantity. Our team will help confirm compatibility, availability, and shipping.

Contact FELEVATOR

Send your requirements to our elevator parts team.