Toshiba G9 APPLICATION GUIDELINE 8.3

G9 APPLICATION GUIDELINE 8.3

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Auto Tune

Introduction

Auto Tune is a function that calculates and measures four motor constants. These motor constants are used to define the motor
model for vector control operation. Vector Control includes Automatic Torque Boost, Sensorless Vector (Open Loop), and PG
Feedback Vector Control mode (Closed Loop).

In lieu of manually calculating the motor constants of the motor, the drive provides the option to calculate the constants. This is
the recommended method when the motor data provided is limited to Capacity, Current, and RPM.

Programming

Direct Access # Parameter Default Value New Value

2: Automatic Torque Boos
3: Sensorless Vector Control (Speed)
4: Sensorless Vector Control (Speed/Torque

F015 V/f Pattern 0: Constant Torque

Switching)
7: PG Feedback Vector Control (Speed)
8: PG Feedback Vector Control

(Speed/Torque Switching)

F011 Maximum Frequency 80.0 Hz

F012 Upper Limit Frequency 60.0 Hz

F014 Base Frequency 60.0 Hz

F409 Base Frequency Voltage Drive dependent

F402 Auto tuning 2 0: Off

F405 Motor Rated Capacity Drive Dependent

F406 Motor Rated Current Drive Dependent

F407 Motor Rated RPM Drive Dependent

F400 Auto tuning 1 0: Auto tune disabled

Table 1: Motor Auto Tune Parameters

1.1 x F012 or greater

Application Dependent

Motor Nameplate

Motor Nameplate

Choose fan cooled or blower cooled

(optional)

Motor Nameplate

Motor Nameplate

Motor Nameplate

4:

Motor constant auto calculation

2: Enable auto tune on run command*

*Must have the motor connected to the drive.

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tional Corporation 2021 www.toshiba.com/tic Email: [e-mail] [phone] 13131 West Little York Road, Houston, TX

Page: 1 of 4

Notes

To perform an auto tune, enter the following information:

 Motor’s Base Frequency (Hz)
 Motor’s Base Frequency Voltage (VAC)
 Motor’s Rated Capacity (kW)
 Motor’s Rated Current (A)
 Motor’s Rated RPM (RPM)

Table 1 shows the parameters that need to be set for a proper auto tune operation. These parameters can be set individually
through the Direct Access menu, and most are configured during the Setup Wizard.

F015 – The V/f pattern should be set to 2, 3, 4, 7 or 8 in order for the motor model to function.

F011 – The maximum frequency needs to be set at least 10% greater than the Upper Limit Frequency for Vector Control to operate
correctly.

F012 – The Upper Limit Frequency is set by the operation of the system. This is typically 60.0 Hz.

F014 – Defines the base frequency at which the motor is rated for. This can be found on the motor nameplate.

F409 – Defines the voltage at which the motor is rated at its base frequency. This can be found on the motor nameplate.

(kW = 0.746 x HP)

F402 – Adds a thermal component to the motor model. You can select a motor that is self-cooled (ODP, TEFC), one that has a blower
attached to it providing constant air flow regardless of rotor speed, or you can leave the compensation OFF.

F405 – Defines the kW capacity of the motor. This can be found on the motor nameplate.

F406 – Defines the full load current of the motor at base voltage and frequency. This can be found on the motor nameplate.

F407 – Defines the rated rotor RPM at full load current, base voltage, and base frequency.

F400 – Enables Auto tune.

Step 1: Enter/verify all the information in all the listed parameters.

Step 2: Set F400 to 4.

This instantaneou

sly auto updates parameters F410 – F413 according to the items set previously and resets F400 to 0.

Step 3: Set F400 to 2.

Step 4: Run th

The

drive sends a pulse to the motor and measures its feedback to adjust F410 and F412 as necessary. The LEDs will display “Atn”

e drive.

during this process. The larger the motor, the longer this will take to complete. Once complete, the drive will run the motor and set
F400 back to 0.

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tional Corporation 2021 www.toshiba.com/tic Email: [e-mail] [phone] 13131 West Little York Road, Houston, TX

Page: 2 of 4

Constant Torque

Variable Torque

Auto Torque Boost

Sensorless Vector 1

Sensorless Vector 2

5-point V/Hz

PM

PG Feedback 1

V/f Pattern F015 0 1 2 3 4 5 6 7 8
Base Frequency F014
Base Frequency Voltage F409
Manual Torque Boost F016 △ △
Slip Frequency Gain F401
Auto-Tuning 2 F402

─ ─ ─
─ ─

─ ─ ─

△ △ △

❒

△ △

△ △

─ ─

─ ─ ─ ─

△ △ △

─

Motor Rated Capacity F405
Motor Rated Current F406

─ ─

❒ ❒ ❒

❒ ❒ ❒

─

Motor Rated RPM F407
MC1 - Torque Boost F410
MC2 - No Load Current F411
MC3 - Leakage Inductance F412

─ ─

† † †

† † †

─

MC4 - Rated Slip F413

❒ : Should Be Set
△ : Adjustable

◌ : Calculated

: Measured

●

† : Adjusted when auto tuned

PG Feedback 2

† Auto-Tune 1

F400=4 F400=2

◌
◌ ←
◌
◌ ←

●

●

Auto Tune Example

Default x = 4 x = 2 x = 4 x = 2

F014 60 Hz ← ← ← ←
F409 230 V ← ← ← ←
F405 .75 kW ← ← ← ←
F406 3.4 A ← ← 2.8 A ←
F407 1690 RPM ← ← 1750 ←
F410 7.3% 4.2% 10.1% 1.7% 8.4%
F411 54% 55% ← 39% ←
F412 100 89 195 41 123
F413 6.11% 6.15% ← 2.82% ←

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Auto Tune Mode (F400 = x)

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Page: 3 of 4

The top chart shows which parameters are referenced in the different V/f patterns of operation. The Base Frequency and Voltage

g

s

should be set in the Fundamental Parameters. Manual Torque Boost, Slip Frequency Gain, and Auto Tuning 2 should only be
changed as an advanced effort to fine tune the system. Motor Rated Capacity, Motor Rated Current, and Motor Rated RPM should
be read off the motor nameplate and entered in F405 - F407. F410 - F413 are changed automatically when performing a F400=4
and then a F400=2 auto tune.

The bottom chart illustrates the how the default motor parameters change when the motor characteristics are set and an auto
tune is performed. The first column shows the parameter defaults. The second shows the values after a F400=4 auto tune is
performed. The third column is where a F400=2 fine tuning has occurred. Look how the numbers have changed. These auto
tunes were performed without entering the correct motor data. In column three you will see that the motor nameplate data has
been correctly entered in the drive. The drive now correctly calculates the motor constants when a F400=4 initiated. Finally, a
F400=2 tuning is performed to pulse the motor and measure the primary resistance and leakage inductance.

Revision History

Rev. Date Written/Revised By Approved By Description

8.1 6/23/2011 Joshua Austin Doug Napier Formatting. Revised to incorporate document control
requirements.

8.2 9/8/2014 Marvin Marcia Terry Voigt Added F015 to

8.3 3/3/2021 Joshua Austin Terry Voigt Updated document with F011 and F012 and formatting.
Updated contact number.

© Toshiba International Corporatio

n 2021 www.toshiba.com/tic Email: [e-mail] [phone] 13131 West Little York Road, Houston, TX

Page: 4 of 4

Programmin

and

Note

sections.