n8: PM Motor Control Tuning

n8-01

(0540)

Expert

Pole Position Detection Current

Sets the Initial Rotor Position Estimated Current as a percentage where E5-03 [PM Motor Rated Current (FLA)] = 100%. Usually it is not necessary to change this setting.

50%

(0 - 100%)

Details

n8-02

(0541)

Expert

Pole Alignment Current Level

Sets the current at the time of polar attraction as a percentage where E5-03 [motor rated current] is 100%. Usually it is not necessary to change this setting.

80%

(0 - 150%)

Details

n8-11

(054A)

Expert

Observer Calculation Gain 2

Sets the gain for speed estimation. Usually it is not necessary to change this setting.

Determined by n8-72

(0.0 - 1000.0)

Details

n8-14

(054D)

Expert

Polarity Compensation Gain 3

Sets the gain for speed estimation. Usually it is not necessary to change this setting.

1.000

(0.000 - 10.000)

Details

n8-15

(054E)

Expert

Polarity Compensation Gain 4

Sets the gain for speed estimation. Usually it is not necessary to change this setting.

0.500

(0.000 - 10.000)

Details

n8-21

(0554)

Expert

Motor Back-EMF (Ke) Gain

Sets the gain for speed estimation. Usually it is not necessary to change this setting.

0.90

(0.80 - 1.00)

Details

n8-35

(0562)

Initial Pole Detection Method

Sets how the drive detects the position of the rotor when the motor starts.

0

Pull-in

 

1

High Frequency Injection

 

2

Pulse Injection

 

Determined by A1-02

(0 - 2)

Details

n8-36

(0563)

HFI Frequency Level for L Tuning

Sets the injection frequency for high frequency injection.

500 Hz

(200 - 1000 Hz)

Details

n8-37

(0564)

Expert

HFI Voltage Amplitude Level

Sets the high frequency injection amplitude as a percentage where 200 V = 100% for 200 V class drives and 400 V = 100% for a 400 V class drives. Usually it is not necessary to change this setting.

20.0%

(0.0 - 50.0%)

Details

n8-39

(0566)

HFI LPF Cutoff Freq

Sets the low-pass filter shut-off frequency for high frequency injection.

250 Hz

(0 - 1000 Hz)

Details

n8-41

(0568)

Expert

HFI P Gain

Sets the response gain for the high frequency injection speed estimation.

2.5

(-10.0 - +10.0)

Details

n8-42

(0569)

Expert

HFI I Time

Sets the integral time constant for the high frequency injection speed estimation. Usually it is not necessary to change this setting.

0.10 s

(0.00 - 9.99 s)

Details

n8-45

(0538)

Speed Feedback Detection Gain

Sets the internal speed feedback detection reduction unit gain as a magnification value. Usually it is not necessary to change this setting.

0.80

(0.00 - 10.00)

Details

n8-47

(053A)

Pull-in Current Comp Filter Time

Sets the time constant the drive uses to align the pull-in current reference value with the actual current value. Usually it is not necessary to change this setting.

5.0 s

(0.0 - 100.0 s)

Details

n8-48

(053B)

RUN

Pull-in/Light Load Id Current

On the basis that parameter E5-03 [Motor Rated Current (FLA)] is the 100% value, this parameter sets the d-axis current that flows to the motor during run at constant speed as a percentage.

30%

(0 - 200%)

Details

n8-49

(053C)

RUN

Expert

Heavy Load Id Current

Sets the d-axis current to that the drive will supply to the motor to run it at a constant speed with a heavy load. Considers E5-03 [PM Motor Rated Current (FLA)] to be 100%. Usually it is not necessary to change this setting.

Determined by E5-01

(-200.0 - +200.0%)

Details

n8-50

(053D)

Expert

Medium Load Iq Level (High)

Sets the load current level at which heavy load control starts where E5-03 [Motor Rated Current (FLA)] is 100%. Usually it is not necessary to change this setting.

80%

(50 - 255)

Details

n8-51

(053E)

Pull-in Current @ Acceleration

Sets the pull-in current allowed to flow during acceleration/deceleration as a percentage of the motor rated current.

Determined by A1-02

(0 - 200%)

Details

n8-54

(056D)

Expert

Voltage Error Compensation Time

Sets the time constant that the drive uses when adjusting for voltage errors.

1.00 s

(0.00 - 10.00 s)

Details

n8-55

(056E)

Motor to Load Inertia Ratio

Sets the ratio between motor inertia and machine inertia.

0

Below 1:10

 

1

Between 1:10 and 1:30

 

2

Between 1:30 and 1:50

 

3

Beyond 1:50

 

0

(0 - 3)

Details

n8-56

(056F)

Expert

PM High Performance Selection

Sets the high efficiency control method for IPM motors. Usually it is not necessary to change this setting.

0

Disabled

 

1

Enabled (Vd)

 

2

Enabled (Vd & Vq)

 

1

(0 - 2)

Details

n8-57

(0574)

HFI Overlap Selection

Sets the function that detects motor speed with high frequency injection.

0

Disabled

Use this setting with SPM motors. The speed control range is approximately 1:20.

When n8-57 = 0, you cannot set E1-09 [Minimum Output Frequency] ≤ 1/20 of the value of E1-06 [Base Frequency].

1

Enabled

The speed control range is 1:100. It gives sufficient speed detection at low speeds.

Note:

• It is not available with an SPM motor.

• The speed control range 1:100 is the momentary operation area. When you operate the motor continuously, make sure that the drive capacity and motor capacity are acceptable.

0

(0, 1)

Details

n8-62

(057D)

Expert

Output Voltage Limit Level

Sets the output voltage limit to prevent saturation of the output voltage. Usually it is not necessary to change this parameter.

200 V Class: 200.0 V, 400 V: 400.0 V

(200 V Class: 0.0 to 230.0 V, 400 V Class: 0.0 to 460.0 V)

Details

n8-63

(057E)

Expert

Output Voltage Limit P Gain

Sets the proportional gain for output voltage control. Usually it is not necessary to change this setting.

1.00

(0.00 - 100.00)

Details

n8-64

(057F)

Expert

Output Voltage Limit I Time

Sets the integral time for output voltage control. Usually it is not necessary to change this setting.

0.040 s

(0.000 - 5.000)

Details

n8-65

(065C)

Expert

Speed Fdbk Gain @ oV Suppression

Sets the gain of internal speed feedback detection suppression while the overvoltage suppression function is operating as a magnification value. Usually it is not necessary to change this parameter.

1.50

(0.00 - 10.00)

Details

n8-69

(065D)

Expert

Speed Observer Control P Gain

Usually it is not necessary to change this setting. Sets the Proportional gain that the drive uses for speed estimation.

1.00

(0.00 - 20.00)

Details

n8-70

(065E)

Expert

Speed Observer Control I Time

Sets the speed estimator integral time constant. It is available when n8-72 = 1 [Speed Estimation Method Select = Method 2]. Usually it is not necessary to change this setting.

0.0 s

(0.0 - 100.0)

Details

n8-71

(065F)

Expert

Speed Observer Control D Gain

Set the speed estimator differential gain. It is available when n8-72 = 1 [Speed Estimation Method Select = Method 2]. Usually it is not necessary to change this setting.

5.00

(0.00 - 50.00)

Details

n8-72

(0655)

Expert

Speed Estimation Method Select

Selects the speed estimation method. Usually it is not necessary to change this setting.

0

Method 1

 

1

Method 2

 

1

(0, 1)

Details

n8-73

(0656)

Expert

Observer Mode Switch-Over Speed

Sets the speed level for pull-in current control at motor start as a percentage of E1-06 [Base Frequency]. Usually it is not necessary to change this setting.

10%

(0 - 100)

Details

n8-74

(05C3)

Expert

Light Load Iq Level

Set n8-48 [Pull-in/Light Load Id Current] to the percentage of load current (q-axis current) that you will apply, where E5-03 [Motor Rated Current (FLA)] = a setting value of 100%.

30%

(0 - 255%)

Details

n8-75

(05C4)

Expert

Medium Load Iq Level (low)

Set n8-78 [Medium Load Id Current] to the percentage of load current (q-axis current) that you will apply, where E5-03 [Motor Rated Current (FLA)] = a setting value of 100%.

50%

(0 - 255%)

Details

n8-76

(05CD)

Expert

Id Switching Filter Time

Sets the filter time constant for the d-axis current reference. Usually it is not necessary to change this setting.

200 ms

(0 - 5000 ms)

Details

n8-77

(05CE)

Expert

Heavy Load Iq Level

Set n8-49 [Heavy Load Id Current] to the percentage of load current (q-axis current) that you will apply, where E5-03 [Motor Rated Current (FLA)] = a setting value of 100%.

90%

(0 - 255%)

Details

n8-78

(05F4)

RUN

Expert

Medium Load Id Current

Sets the level of the pull-in current as a percentage, where E5-03 [PM Motor Rated Current (FLA)] = 100%.

0%

(0 - 255%)

Details

n8-79

(05FE)

Pull-in Current @ Deceleration

Sets the pull-in current that can flow during deceleration as a percentage of the E5-03 [PM Motor Rated Current (FLA)].

50%

(0 - 200%)

Details

n8-84

(02D3)

Expert

Polarity Detection Current

Sets the current that the drive uses to estimate the initial motor magnetic pole as a percentage where E5-03 [PM Motor Rated Current (FLA)] = 100%.

100%

(0 - 150%)

Details

n8-87

(02DA)

Output Voltage Limit Method

Sets the method of output voltage limit. If there is vibration in the constant output range, set Feedforward Method. Usually it is not necessary to change this setting.

0

Feedback Method

 

1

Feedforward Method

 

0

(0, 1)

Details

n8-88

(02BD)

Vout Limit Switching Level

Sets the current level at which output voltage limit sequence selection occurs as a percentage where the motor rated current is 100%. Normally there is no need to change this setting.

400%

(0 - 400%)

Details

n8-89

(02BE)

Vout Limit Switching Hysteresis

Sets the hysteresis width of the current level at which output voltage limit sequence selection occurs as a percentage where the motor rated current is 100%. Normally there is no need to change this setting.

3%

(0 - 400%)

Details

n8-90

(02BF)

Vout Limit Switching Speed

Sets the speed level at which output voltage limit sequence selection occurs as a percentage where the maximum output frequency is 100%. Usually it is not necessary to change this setting.

200%

(0 - 200%)

Details

n8-91

(02F7)

Id Limit at Voltage Saturation

Sets the limit value of feedback output voltage limit Id operation. Enabled when n8-87 = 0 [Output Voltage Control Selection = Speed Feedback Form]. Usually it is not necessary to change this setting.

-50%

(-200 - 0%)

Details

n8-94

(012D)

Expert

Flux Position Estimation Method

Sets the criteria that the drive uses to find changes in speed or load. Usually it is not necessary to change this setting.

0

Softstarter

 

1

Speed Feedback

Set n8-57 = 1 [HFI Overlap Selection = Enabled] to enable this parameter. Increases the stability when the speed or load suddenly change, for example with rapid acceleration/deceleration or impact loads.

1

(0, 1)

Details

n8-95

(012E)

Expert

Flux Position Est Filter Time

Sets the time constant of the filter used for the recognition criteria value for speed and load changes. Usually it is not necessary to change this setting.

30 ms

(0 - 100 ms)

Details