Hitachi SJ Series User Manual page 219

Chapter 12
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1
Check the motor type.
• Use an induction motor (IM).
Proceed to #2
2
Select a control mode.
• No feedback is to be used.
• To use in applications, such as lifts and
cranes, that require a high torque from the
start.
Proceed to "12.9.10 Use zero-speed
range (zero-Hz range) sensorless vector
control."
• To use in applications, such as conveyors
and machine tools, that carry heavy loads
and require a high torque.
Proceed to "12.9.9 Use sensorless
vector control."
• To use in applications where the
frequency-voltage characteristics of a
high-speed motor/special motor need to be
changed freely as intended.
Proceed to "12.9.4 Drive with free V/f
control."
• To use in applications that require a certain
torque at the start though the load is light.
Proceed to "12.9.6 Manually adjust
torque." or
Proceed to "12.9.7 Automatically adjust
torque."
• To save energy with V/f control
appropriately to a fan/pump.
Proceed to "12.9.3 Drive with V/f control
(reducing torque characteristics)."
• To use with generic characteristics of V/f
control.
Proceed to "12.9.2 Drive with V/f control
(constant torque characteristics)
• To use a synchronous motor (SM)/permanent
magnet motor (PMM).
Proceed to "12.9.12 Drive synchronous
motor (permanent magnet motor)."
• To use in applications that require feedback from
encoders, sensors, etc.
• To use in applications: that carry a heavy
load; that require control needing a high
torque; and that require position control.
Proceed to "12.9.11 Drive with vector
control with sensor."
• To use in applications where a motor with
an encoder is driven and the
frequency-voltage characteristics of the
motor need to be changed freely as
intended.
Proceed to "12.9.15 Drive with free V/f
control with sensor."
• To use in applications: where a motor with
an encoder is driven; that require a certain
torque at the start; and where the motor
revolution speed needs to be equal to the
command speed.
Proceed to "12.9.16 Use automatic
boost function with sensor."
• To use in applications where afan/pump
with an encoder is driven and where the
motor revolution speed needs to be equal
to the command speed while the energy
consumption needs to be reduced.
Proceed to "12.9.14 Drive with V/f
control with sensor (reducing torque
characteristics)."
• To use in applications where a motor with
an encoder is driven and where the motor
needs to be used with generic
characteristics of V/f control.
Proceed to "12.9.13 Drive with V/f
control with sensor (constant torque
characteristics)."
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• To conduct encoder feedback, see also "12.9.17
Use encoder."
12-9-2
Inverter Function