Yaskawa G7 inverter realizes self-learning of motor parameters in elevator drive control

In order to make the inverter and the motor fully match the operation and achieve the best operating comfort, the characteristic parameters of the motor, such as no-load current, rated slip, etc., should be input into the inverter.

Tip: If you don’t know these parameters beforehand, you can use it for motor self-learning. (Note: During elevator installation and maintenance, this operation should not be confused with the motor encoder phase angle compensation correction operation and elevator shaft self-learning operation. Motor winding parameter learning operation, motor Encoder phase angle compensation correction operation and elevator shaft self-learning These are three different operations, which are the first step of the initial startup of the elevator, which is the matching operation between the traction motor and the configured frequency converter, so that the frequency converter automatically learns these Parameters. For the specific operation of inverter programming, please refer to the inverter operation instructions in this chapter.

The motor self-learning operation steps are as follows:

(1) Lift the car with a hoist, remove the wire rope from the traction sheave, make the motor completely free from the load, and confirm that there is no danger even if the motor rotates.

Note: The Yaskawa G7 inverter learns from the host, and can choose static self-learning operation. If you choose static self-learning operation, you don’t need to lift the car and unload the wire rope.

(2) Confirm that the rotary encoder is installed properly.

(3) Before self-learning, A1-02=02 must be set to A1-02=03 (open loop to closed loop).

(4) Confirm the rotation direction of the rotary encoder: when driving in slow, closed-loop operation, if the PG direction is opposite, the motor speed will be very slow, the feedback current will be very abnormal, and it may be accompanied by vibration. When the direction of rotation is opposite, use the programming method to change the F1-05 (rotary encoder pulse sequence phase sequence) parameter.

(5) Open the brake.

(6) Enter the self-learning menu Auto-Tuning, and then input the following parameters in sequence:

a) T1-01=0 (0 means rotating self-learning, 1 means static self-learning, Yaskawa G7 can choose static self-learning, select static self-learning and set this parameter to "1")

T1-02 (Rated Power motor output power)

T1-03 (Rated Voltage)

T1-04 (Rated Current)

T1-05 (Rated Frequency)

T1-06 (Number of poles motor poles, motor pole number = 120 f/v, f: the voltage frequency of the motor nameplate v: the motor speed)

T1-07 (Motor Speed ​​rated speed)

T1-08 (PG Pulses encoder pulse number)

b) Other parameters are ignored.

c) When press run key­ is displayed.

d) The operating contactor is artificially closed.

e) Press the "Run" key on the operation panel.

f) The inverter automatically enters the self-learning state. If you select the rotating self-learning, the motor will automatically run for a period of time.

g) The inverter displays "Tune Successful" to indicate the end of self-learning, and the motor will stop after a while.

(7)If the result of the self-learning operation fails, and an error indication will appear on the operation panel at the same time, the possible causes and solutions are as follows: re-enter the parameters after rectification, and re-use the operation panel to do the motor self-learning operation again.

(8) After the self-learning is completed, restore the brake to the tight state, release the running contactor, the wire rope and the car to return to their original state.

Yaskawa G7 frequency converter motor parameter learning is over