YASKAWA VS MINI J7 Manuel d'utilisateur télécharger pdf (Page 73)

• General-purpose motor and inverter motor

Induction motors are classified as general-purpose motors or inverter

motors, based on their cooling capabilities. Therefore, the motor overload

function operates differently between these two motor types.

Example of 200V class motor

General-purpose MotorInverter Motor

Cooling Effect Torque Characteristics

Electronic Thermal

overload

Effective when

operated at

50/60Hz from

commercial

power supply.

Effective even

when operated at

low speed

(approx. 6Hz)

Base Frequency 60Hz

(V/f for 60Hz, 220V Input Voltage)

For low-speed operation, torque

must be limited in order to stop

motor temperature rise.

Base Frequency 60Hz

(V/f for 60Hz, 220V Input Voltage)

Use an inverter motor for

continuous operation at low speed.

“OL1” error (motor

overload protection)

occurs when

continuously

operated at 50/60Hz

or less at 100% load.

Electronic thermal

overload protection

not activated even

when continuously

operated at 50/60Hz

or less at 100% load.

60 SEC

SHORT-TERM

CONTINUOUS

RATING

180

155

140

100

320 60 120

TORQUE

(%)

OPERATION FREQUENCY (Hz)

180

150

100

660120

TORQUE

(%)

OPERATION FREQUENCY (Hz)

60 SEC

SHORT-TERM

CONTINUOUS

RATING

 Selecting Cooling Fan Operation

In order to increase lifetime, the cooling fan can be set to operate only when

inverter is running.

n35 = 0 (initial setting) : Operates only when inverter is running (Continues

operation for 1 minute after inverter is stopped.)

= 1 : Operates with power ON

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YASKAWA VS MINI J7 Manuel d'utilisateur Page 73

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