15P0082B8
USER MANUAL
SINUS/ISD
6 - 46/82
6.4.1.29
PATTERN GEN
The pattern generator function block
allows the user to configure the inverter
PWM (Pulse Width Modulator)
operation.
Functional Description
The SINUS/ISD inverter provides a unique quiet pattern PWM strategy in order to reduce audible motor noise.
The user is able to select between the quite pattern or the more conventional fixed carrier frequency method.
With the quiet pattern strategy selected (random pattern enabled), audible motor noise is reduced to a dull hiss.
In addition, the user is able to select the PWM carrier frequency. This is the main switching frequency of the
power output stage of the Frequency Inverter. A high setting of carrier frequency (e.g. 9kHz) reduces audible
motor noise but only at the expense of higher inverter losses and lower motor torque at low output frequencies. A
low setting of carrier frequency (e.g. 3kHz), reduces inverter losses but increases audible motor noise.
MMI Menu Map
1
SETUP PARAMETERS
2
FUNCTION BLOCKS
3
MOTOR CONTROL
4
PATTERN GEN
RANDOM PATTERN
PATTERN GEN FREQ
DEFLUX DELAY
DRIVE FREQUENCY
VOLTS
BOOST
PATTERN GEN
PATTERN GEN
DRIVE FREQUENCY [591] –– 0.0 Hz
VOLTS [592] –– 0.0 V
BOOST [593] –– 0.0 V
TRUE – [ 98] RANDOM PATTERN
––
3 kHz –– [ 99] FREQ SELECT
––
2.0 s –– [100] DEFLUX DELAY
––
Parameter Descriptions
Parameter Descriptions
RANDOM PATTERN
RANDOM PATTERN
Range: FALSE / TRUE
This parameter selects between random pattern (quiet motor noise) or the more
conventional fixed carrier PWM strategies. When TRUE, random pattern is enabled.
FREQ SELECT
FREQ SELECT
Range: Enumerated - see below
This parameter selects the base switching frequency of the output power stack. The
choices of switching frequency are:
Enumerated Value
:
Frequency
0 : 3 kHz
1 : 6 kHz
2 : 9 kHz
The higher the switching frequency, the lower the level of motor audible noise. However,
this is only achieved at the expense of increased Inverter losses.
Note: This parameter is internally clamped to 3kHz on 0.75kW, 380/460V units
DEFLUX DELAY
DEFLUX DELAY
Range: 0.1 to 10.0 s
Sets the minimum allowed delay between disabling and then re-enabling PWM
production (i.e. stopping and starting the drive).
DRIVE FREQUENCY
DRIVE FREQUENCY
Range: xxxx.x Hz
The inverter output frequency.
VOLTS
VOLTS
Range: xxxx.x V
The inverter output volts.
BOOST
BOOST
Range: xxxx.x V
The inverter output boost.
Summary of Contents for SINUS/ISD 200 S-0.75
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