Hitachi WJ C1 Series User Manual

Chapter 9 Inverter Functions
9-5-1
9.5 Selecting Control Mode for the Motor and Load
9.5.1 Selection of Control Mode
 What are the motor control methods available?
 How to set the appropriate control method for the intended application?
 Use "Control mode selection [A044]
*1
" to set the appropriate control mode according to the
drive motor and intended application. For details, refer to the table below, and the descriptions
of each control mode provided in the following sections.
Control
mode
Summary
Torque
boost
Automatic
energy-
saving
operation
V/f
control
with
encoder
Multi
motor
drive
Motor
constant
settings or
auto-tuning
V/f control
Constant
torque
characteristics
Suitable for easy setup and
adjustment for conveyors, carts,
and other motor drive
applications requiring a
constant torque.
Applicable
Applicable
*2
Applicable
*3
Applicable
*2
Not
required
*2
V/f control
Reduced
torque
characteristics
Suitable for easy setup and
adjustment for fans, pumps, and
other motor drive applications
that do not require a large
torque.
Applicable
Applicable
*2
Applicable
*3
Applicable
*2
Not
required
*2
V/f control
Free V/f
Suitable for applications where
the user is free to set an output
voltage relative to the output
frequency, such as for special
motors and other such
applications.
Not
applicable
Not
applicable
Applicable
*3
Applicable
Not
required
Sensorless
vector control
Suitable for applications that
require high torque from low
speeds, and applications that
require high precision output
frequency.
Not
applicable
Not
applicable
Not
applicable
Not
applicable
Required
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
*2. Automatic energy-saving operation and multi motor drive will be unavailable while using the automatic torque
boost function. In addition, motor constant settings or auto-tuning are required.
*3. This does not function when "2nd-motor control [SET]" is on. This function is only available when using the 1st
motor control mode.
 When using sensorless vector control and automatic torque boost, be sure to set the motor
constant for your motor. For details, refer to "8.1.5 Setting Motor Constant" or "8.3 Carrying Out
Motor Auto-tuning ".
 When multiple induction motors (IM) are driven by a single inverter, use V/f control.
 In V/f control, an external encoder provides feedback on the actual motor speed, allowing for
highly accurate and stable speed control. For details, refer to "9.5.5 Motor Operation with V/f
Control with Encoder".
Q
A
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Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English