Control Techniques Unidrive 1 Series, Руководство пользователя

Страница: 92 / 208

Safety
Information
Product
Information
Mechanical
Installation
Electrical
Installation
Getting
Started
Menu 0
Running
the motor
Optimisation Macros
Advanced
Parameters
Technical
Data
Diagnostics
UL Listing
Information
92
Unidrive User Guide
www.controltechniques.com Issue Number: 9
8 Optimisation
8.1 Motor map parameters
8.1.1 Open loop motor control
This section provides information on how to get the most from the
Unidrive once an autotune and basic set up has been completed.
A separate section is provided for each operating mode at the beginning
and then common parameters / features are detailed towards the end of
the section.
Information such as tuning the speed and current loop gains and also
explanations of the effects of motor map parameters are included.
Pr 0.46 {5.07} Motor rated current Defines the maximum motor continuous current
The motor rated current parameter must be set to the maximum continuous current of the motor to ensure the current limits in the drive function at
the correct levels so that the motor is protected should an overload situation occur.
Pr 0.42 {5.11} Motor number of poles Defines the number of motor poles
The motor number of poles parameter defines the speed displayed by the drive for a given output frequency.
i.e. 4 pole motor 50 Hz = 1,500 rpm
2 pole motor 50 Hz = 3,000 rpm
Pr 0.44 {5.09} Motor rated voltage Defines the voltage applied to the motor at rated frequency
Pr 0.47 {5.06} Motor rated frequency Defines the frequency at which rated voltage is applied
The voltage and frequency parameters define the relationship between
the voltage and frequency applied to the motor as shown aside:
The volts / frequency ratio must be kept constant to ensure rated torque
is available from the motor over the frequency range.
At low frequencies (from 0 Hz to ½ x Pr
5.06 ) the voltage is increased
from this characteristic by a level governed by either the voltage boost
parameter or the motor parameters (found during the stator resistance
test) depending on whether the drive is in fixed boost or open loop vector
mode as shown aside:
Pr 0.43 {5.10} Motor rated power factor
Defines the angle between the motor rated current and the torque
producing current
The power factor is found by the drive during the autotune procedure. It
is used in the open loop vector algorithm and to set the current limit
levels for the torque producing (active) current.
Output
voltage
Pr / 2 5.09
Pr 5.09
Pr / 2 5.06 Pr 5.06
Output
frequency
Output voltage characteristic
Output
voltage
Pr / 2 5.09
Pr 5.09
Pr / 2 5.06 Pr 5.06
Output
frequency
Output voltage characteristic
Voltage boost
Torque
producing
current
Magnetising
current
Total motor
current
Cos
φ