1.2 General Description
u
Control Mode Details
Table 1.1 gives an overview of the various features associated with the Z1000 Bypass.
Table 1.1 Control Mode Features
Motor Type Induction Motors Comments
Control Mode V/f –
Basic Description V/f control –
Type of Applications
Motor Type IM –
Multi Motor YES –
Motor data unknown YES –
High Speed Accuracy – –
Control
Characteristics
Speed Control Range 1:40 May fluctuate with characteristics and motor temperature.
Speed Accuracy ±2 to 3%
Speed deviation when operating at constant speed may
fluctuate with characteristics and motor temperature.
Speed Response 3 Hz (approx.)
Max. frequency of a speed reference signal that the drive can
follow may fluctuate with characteristics and motor
temperature.
Starting Torque 140% at 3 Hz
Starting torque may fluctuate with characteristics and motor
temperature.
Performance may differ by capacity.
Application-Specific
Auto-Tuning
• Energy Saving Tuning
• Line to line resistance
Automatically adjusts parameter settings that concern
electrical characteristics of the motor.
Speed Search YES
Bi-directional speed detection of a coasting motor to restart
it without stopping.
Energy-Saving Control YES
Saves energy by always operating the motor at its maximum
efficiency.
High Slip Braking YES
Increases motor loss to allow for faster deceleration.
Effectiveness may vary based on motor characteristics.
Kinetic Energy Buffering YES
Decelerates the drive to allow it to ride through a momentary
power loss and continue operation.
Overexcitation Deceleration YES Provides fast deceleration without using a braking resistor.
Overvoltage Suppression YES
Prevents overvoltage by increasing speed during
regeneration.
1.2 General Description
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
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1
Receiving
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