Chapter 17 How to Select the Right AC Motor Drive
CT2000 Series
17-1
Chapter 17 How to Select the Right
AC Motor Drive
17-1 Capacity formula
17-2 General Precautions
17-3 How to choose a suitable motor
The choice of the right AC motor drive for the application is very important and has great influence on its
lifetime. If the capacity of AC motor drive is too large, it cannot offer complete protection to the motor and
motor maybe damaged. If the capacity of AC motor drive is too small, it cannot offer the required
performance and the AC motor drive maybe damaged due to overloading.
But by simply selecting the AC motor drive of the same capacity as the motor, user application
requirements cannot be met completely. Therefore, a designer should consider all the conditions,
including load type, load speed, load characteristic, operation method, rated output, rated speed, power
and the change of load capacity. The following table lists the factors you need to consider, depending on
your requirements.
Item
Related Specification
Speed and torque
characteristics
Time
ratings
Overload
capacity
Starting
torque
Load type
Friction load and weight
load
Liquid (viscous) load
Inertia load
Load with power
transmission
●
●
Load speed and
torque
characteristics
Constant torque
Constant output
Decreasing torque
Decreasing output
●
●
Load
characteristics
Constant load
Shock load
Repetitive load
High starting torque
Low starting torque
●
●
●
●
Continuous operation, Short-time operation
Long-time operation at medium/low speeds
●
●
Maximum output current (instantaneous)
Constant output current (continuous)
●
●
Maximum frequency, Base frequency
●
Power supply transformer capacity or
percentage impedance
Voltage fluctuations and unbalance
Number of phases, single phase protection
Frequency
●
●
Mechanical friction, losses in wiring
●
●
Duty cycle modification
●
Summary of Contents for CT2000 Series
Page 5: ...Chapter 1 Introduction CT2000 Series 1 2 Model Name VFD 750 CT 43 F 00 A6 Serial Number...
Page 22: ...Chapter 1 Introduction CT2000 Series 1 19 Digital Keypad KPC CC01 KPC CE01 Unit mm inch...
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Page 41: ...Chapter 4 Wiring CT2000 Series 4 6 This page intentionally left blank...
Page 71: ...Chapter 7 Optional Accessories CT2000 Series 7 18 Wall Mounting Embedded Mounting...
Page 87: ...Chapter 8 Optional Cards CT2000 Series 8 8 PG Card intallation...
Page 88: ...Chapter 8 Optional Cards CT2000 Series 8 9 Disconneting the extension card...
Page 92: ...Chapter 8 Optional Cards CT2000 Series 8 13 PG2 Wiring Diagram...
Page 95: ...Chapter 8 Optional Cards CT2000 Series 8 16 PG2 Wiring Diagram...
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Page 259: ...Chapter 12 Description of Parameter Settings CT2000 Series 12 1 03 11...
Page 260: ...Chapter 12 Description of Parameter Settings CT2000 Series 12 1 03 12...
Page 263: ...Chapter 12 Description of Parameter Settings CT2000 Series 12 1 03 15...
Page 266: ...Chapter 12 Description of Parameter Settings CT2000 Series 12 1 03 18...
Page 397: ...Chapter 13 Warning Codes CT2000 Series 13 8 This page intentionally left blank...
Page 407: ...Chapter 14 Fault Codes and Descriptions CT2000 Series 14 10 This page intentionally left blank...
Page 489: ...Chapter 16 PLC Function CT2000 Series 16 48 LD X1 Load Contact a of X1 OUT Y1 Drive Y1 coil...
Page 592: ...Chapter 16 PLC Function CT2000 Series 16 151...
Page 594: ...Chapter 16 PLC Function CT2000 Series 16 153...
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