This section gives information about Auto-Tuning for induction motors. Auto-Tuning sets these parameters:

  • Motor parameters E1-xx, E2-xx (E3-xx, E4-xx for motor 2)

  • Speed feedback detection-use F1-xx (only with CLV)

Note:

Do Stationary Auto-Tuning if you cannot do Rotational Auto-Tuning. There can be large differences between the measured results and the motor characteristics when Auto-Tuning is complete. Examine the parameters for the measured motor characteristics after you do Stationary Auto-Tuning.

Table 1. Types of Auto-Tuning for Induction Motors

Mode

Parameter Settings

Application Conditions and Benefits

Applicable Control Method

(A1-02 Setting)

V/f

(0)

CL-V/f

(1)

OLV

(2)

CLV

(3)

AOLV

(4)

Rotational Auto-Tuning

T1-01 = 0

  • When you can decouple the motor and load the motor can rotate freely while Auto-Tuning.

  • When operating motors that have fixed output characteristics.

  • When it is necessary to use motors that have high-precision control.

  • When you cannot decouple the motor and load, but the motor load is less than 30%.

x

x

x

x

x

Stationary Auto-Tuning 1

T1-01 = 1

  • When you cannot decouple the motor and load, but the motor load is more than 30%.

  • When the information from the motor test report or motor nameplate is not available.

    With Stationary Auto-Tuning, the energized drive stays stopped for approximately 1 minute. During this time, the drive automatically measures the necessary motor parameters.

  • When operating the motor with a light load after Auto-Tuning.

    The drive can automatically calculate the motor parameter settings necessary for torque control. Set T1-12 = 1 [Test Mode Selection = Yes] to do a test run after Auto-Tuning.

-

-

x

x

x

Line-to-Line Resistance

T1-01 = 2

  • After Auto-Tuning, the wiring distance between the drive and motor changed by 50 m or more.

  • When the wiring distance is 50 m or more in the V/f Control mode.

  • When the motor output and drive capacity are different.

x

x

x

x

x

Input Data for Induction Motor Auto-Tuning

To do Auto-Tuning, input data for the items in Table 2 that have an "x". Before starting Auto-Tuning, prepare the motor test report or record the information on the motor nameplate as a reference.

Table 2. Input Data for Induction Motor Auto-Tuning

Input Data

Parameter

Unit

Auto-Tuning Mode

(T1-01 Setting)

Rotational Auto-Tuning

(0)

Stationary Auto-Tuning 1

(1)

Line-to-Line Resistance

(2)

Motor Rated Power

T1-02

kW

x

x

x

Motor Rated Voltage

T1-03

V

x

x

-

Motor Rated Current

T1-04

A

x

x

x

Motor Base Frequency

T1-05

Hz

x

x

-

Number of Motor Poles

T1-06

-

x

x

-

Motor Base Speed

T1-07

min-1

x

x

-

Encoder Pulse Count (PPR)

T1-08

-

○1

○ 1

-

Motor No-Load Current

T1-09

A

-

x

-

Motor Rated Slip Frequency

T1-10

Hz

-

○ 2

-

Motor Iron Loss

T1-11

W

○ 3

-

-

Test Mode Selection 4

T1-12

-

-

○ 5

-

No-load voltage

T1-13

V

○ 6

○ 6

-
 
1

Input this value when A1-02 = 3 [Control Method Selection = Closed Loop Vector].

2

Shows 0 Hz as the default value. If you do not know the Motor Rated Slip Frequency, keep the setting at 0 Hz.

3

Input this value when A1-02 = 0 or 1 [Control Method Selection = V/f Control or V/f Control w/ PG].

4

If T1-12 = 1 [Test Mode Selection = Yes], when you run the motor in Drive Mode for the first time after Auto-Tuning, the drive will automatically set E2-02 [Motor Rated Slip] and E2-03 [Motor No-Load Current].

5

Input this value when T1-10 [Motor Rated Slip Frequency] = 0 Hz.

6

Set the same value to No-Load Voltage as T1-03 [Motor Rated Voltage] to get the same characteristics using Yaskawa 1000-Series drives or other legacy models.