Yaskawa iQpump Micro Manuel d'utilisateur télécharger pdf (Page 42)

3 6

100

25% ED (or 15 min)

40% ED (or 20 min)

60% ED (or 40 min)

Frequency (Hz)

Continuous operation

Torque

(%)

Figure i.2 Allowable Load Characteristics for a Yaskawa Motor

Insulation Tolerance

NOTICE: Consider motor voltage tolerance levels and motor insulation in applications with an input voltage of over 440 V or particularly

long wiring distances.

High-Speed Operation

NOTICE: Problems may occur with the motor bearings and dynamic balance of the machine when operating a motor beyond its rated speed.

Contact the motor or machine manufacturer.

Torque Characteristics

Torque characteristics differ compared to operating the motor directly from line power. The user should have a full

understanding of the load torque characteristics for the application.

Vibration and Shock

The drive allows selection of high carrier PWM control and low carrier PWM. Selecting high carrier PWM can help reduce

motor oscillation (drive current derating may be required).

Take particular caution when adding a variable speed drive to an application running a motor from line power at a constant

speed. If resonance occurs, use shock absorbing mounts to the motor base and enable the Jump frequency selection to prevent

continuous operation in the resonant frequency range.

Audible Noise

The audible noise of the motor varies based on the carrier frequency setting. However, drive current derating may be required.

When using a high carrier frequency, audible noise from the motor is comparable to the motor noise generated when running

from line power.

Specialized Motors

Multi-Pole Motor

Because the rated current will differ from a standard motor, be sure to check the maximum current when selecting a drive.

Always stop the motor before switching between the number of motor poles. If a regen overvoltage (oV) fault occurs or if

overcurrent protection (oC) is triggered, the motor will coast to stop.

Submersible Motor

The rated current of a submersible motor is greater than that of a standard motor, so select the drive accordingly. Use a motor

cable large enough to avoid decreasing the maximum torque level from voltage drop caused by a long motor cable.

Explosion-Proof Motor

The motor and the drive must be tested together to be certified as explosion-proof. The drive is not designed for explosion-

proof areas.

Geared Motor

Make sure that the gear and the lubricant are rated for the desired speed range to avoid gear damage when operating at low

speeds or very high speeds. Consult with the manufacturer for applications that require operation outside the rated speed range

of the motor or gear box.

i.2 General Safety

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Yaskawa iQpump Micro Manuel d'utilisateur Page 42

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