Lenze 8400 User Manual

5 Motor control (MCTRL)
5.10 Parameterisable additional functions
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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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5.10 Parameterisable additional functions
5.10.1 Selection of switching frequency
The switching frequency of the inverter that can be selected in C00018 influences the smooth
running performance and the noise generation in the connected motor as well as the power losses
in the inverter.
The lower the switching frequency the higher the concentricity factor, the smaller the losses, and
the higher the noise generation.
Short overview of the relevant parameters:
 Stop!
If operated at a switching frequency of 16 kHz, the inverter output current must not
exceed the current limit values specified in the technical data! (See "Rated data" section
of the hardware manual.)
 Note!
• Operate mid-frequency motors only at a switching frequency of 8 kHz or 16 kHz
(var./drive-opt.).
• If operated at a switching frequency of 16 kHz, the Ixt evaluation (C00064
) is
considered including the required derating to 67 % of the rated device current at
switching frequencies of 2.4 and 8 kHz.
• Ensure that the value does not fall below the permissible switching frequency,
• if the motor is not approved for the setting switching frequency
- or -
• if a sinusoidal filter has been connected between the output of the inverter and the
motor which is not approved for the setting switching frequency.
(see section "Preventing a decrease of the switching frequency
")
Parameters Info Lenze setting
Value Unit
C00018 Switching frequency 2: "8 kHz var./drive-opt."
C00144
Switching frequency reduction (temp.) 1: On
C00725 Current switching frequency -
C00910/1
Max. pos. output frequency 1000 Hz
C00910/2
Max. neg. output frequency 1000 Hz
C02864/1
Bit 4:
MCTRL: Special settings 2
Option "Motor ident: Switching frequency 8 kHz"
(from version 14.00.00)
0x0000
(Off)
Greyed out = display parameter

Lenze 8400 Specifications

General

Category	DC Drives
Series	8400
Protection class	IP20
Control Type	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature
Input Voltage	AC 230/400/480 V