Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 57)

1.2 General Description
u Control Mode Details
Table 1.1 gives an overview of the various features associated with the 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 150% at 3 Hz
Starting torque may fluctuate with characteristics
and motor temperature.
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.
Overexcitation
Deceleration
YES
Provides fast deceleration without using a braking
resistor.
Commercial Power Switching
Selection
YES
When the output frequency matches the power
supply frequency (60 Hz), the PWM switching
operation stops and switches to operation with a
direct commercial power supply connection.
1.2 General Description
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual 57
1
Receiving