1.2 General Description
28 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
◆ Control Mode Selection
Table 1.2 gives an overview of the E1000 control modes and their various features.
Table 1.2 Control Modes and their Features
Motor Type Induction Motors Permanent Magnet Motors Comments
Control Mode V/f OLV/PM –
Parameter Setting A1-02 = 0 A1-02 = 5 Default Setting is V/f control.
Basic Description
V/f control
Open Loop Vector control
for PM motors
–
Type of
Applications
Multi Motor YES N/A –
Motor data
unknown
YES N/A –
High Speed
Accuracy
N/A YES –
Control
Characteristics
Speed Control
Range
1:40 1:20 May fluctuate with characteristics and motor temperature.
Speed Accuracy ±2 to 3% ±0.2%
Speed deviation when operating at constant speed. May fluctuate with
characteristics and motor temperature.
Speed Response 3 Hz (approx.) 10 Hz
Max. frequency of a speed reference signal that the drive can follow. May
fluctuate with characteristics and motor temperature.
Starting Torque 150% at 3 Hz 100% at 5% speed
May fluctuate with characteristics and motor temperature.
Performance may differ by capacity.
Application-
Specific
Auto-Tuning
• Energy Saving Tuning
• Line-to-line resistance
• Stationary
• Line-to-line resistance
Automatically adjusts parameter settings that concern electrical
characteristics of the motor.
Speed Search YES YES
Bi-directional speed detection of a coasting motor to restart it without
stopping.
Energy-Saving
Control
YES N/A Saves energy by always operating the motor at its maximum efficiency.
High Slip
Braking
YES N/A
Increases motor loss to allow for faster deceleration than normal without the
use of dynamic braking options. The effectiveness may vary based on motor
characteristics.
Kinetic Energy
Buffering
YES YES
Decelerates the drive to allow it to ride through a momentary power loss and
continue operation.
Overexcitation
Deceleration
YES N/A Provides fast deceleration without using dynamic braking options.
Overvoltage
Suppression
YES YES
Prevents overvoltage by increasing speed during regeneration. Never use
this function with hoist or crane applications.
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