3.17 Motor Application Precautions
SIEPCYEUOQ2V01A Q2V Technical Manual
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3.17
Motor Application Precautions
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Precautions for Existing Standard Motors
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Low-Speed Range
When a drive operates a standard motor, it will lose more power compared to operating the motor with a
commercial power supply. In the low speed range, the temperature of the motor increases quickly because the
motor cannot decrease its temperature when the speed decreases. In these conditions, decrease the load torque of
the motor in the low-speed range.
shows the permitted load characteristics for a Yaskawa standard
motor. When 100% continuous torque is necessary at low speeds, use a motor designed to operate with a drive.
A - 25% ED (or 15 min)
B - 40% ED (or 20 min)
C - 60% ED (or 40 min)
D - Continuous operation
Figure 3.46 Permitted Load Characteristics for a Yaskawa Standard Motors
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Insulation Withstand Voltage
Consider motor voltage tolerance levels and motor insulation in applications with an input voltage of over 440 V
or particularly long wiring distances. Use an insulated drive motor.
NOTICE:
Use an inverter-duty motor or vector-duty motor with reinforced insulation and windings applicable for use with an AC
drive. If the motor does not have the correct insulation, it can cause a short circuit or ground fault from insulation deterioration.
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High-Speed Operation
If you operate a motor more than its rated speed, you can have problems with the motor bearing durability and
dynamic balance of the machine. Contact the motor or machine manufacturer.
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Torque Characteristics
When you operate a motor with a drive, the torque characteristics are different than when you operate the motor
directly from line power. Make sure that you know about the load torque characteristics for your application.
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Vibration
Vibrations could occur in the these conditions:
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Resonance with the natural frequency of machinery
Use caution if you add a variable-speed drive to applications that operate the motor from line power at a
constant speed. If resonance occurs, install shock-absorbing rubber around the base of the motor and enable the
Jump frequency control.
•
The motor is not balanced
Use caution if the motor speed is more than the rated motor speed.
•
Subsynchronous resonance
Subsynchronous resonance can occur with long motor shafts and in applications such as turbines, blowers, and
fans with high inertia loads.
Summary of Contents for Q2V Series
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Page 12: ...12 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 18: ...i 2 Legal Information 18 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 26: ...1 2 Features and Advantages of Control Methods 26 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 38: ...2 8 Installation Methods 38 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 70: ...3 3 Main Circuit Wiring 70 SIEPCYEUOQ2V01A Q2V Technical Manual Models B006 B012...
Page 102: ...3 17 Motor Application Precautions 102 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 138: ...4 12 Test Run Checklist 138 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 144: ...5 2 European Standards 144 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 145: ...Standards Compliance 5 5 2 European Standards SIEPCYEUOQ2V01A Q2V Technical Manual 145...
Page 146: ...5 2 European Standards 146 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 266: ...7 10 Troubleshooting Without Fault Display 266 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 284: ...8 6 Storage Guidelines 284 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 312: ...10 10 Peripheral Devices and Options 312 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 430: ...11 21 Parameters Changed by PM Motor Code Selection 430 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 731: ...SIEPCYEUOQ2V01A Q2V Technical Manual 731 Z Z pulse Auto Tuning 125...