Chapter 12 Description of Parameter Settings
ME300
Default: 0
Settings 0: Disabled
1: RPWM mode 1
2: RPWM mode 2
3: RPWM mode 3
Different control modes for Pr.00-33:
Motor Induction Motor (IM)
Permanent Magnet
Synchronous Motor (PM)
Control Mode VF SVC SVC
0: RPWM mode 1
1: RPWM mode 2
2: RPWM mode 3
When the RPWM function is enabled, the drive randomly distributes the carrier frequency based
on actual Pr.00-17 carrier frequency settings.
The RPWM function can be applied to all control modes.
Once the RPWM function is enabled, particularly high frequency audio noise is reduced, and the
audio frequency produced by the running motor also changes (usually from a higher to lower).
Three RPWM modes are provided for different applications. Each mode corresponds to different
frequency distribution, electromagnetic noise distribution, and audio frequency.
The settings for Pr.00-17 (Carrier Frequency) vary with enabling or disabling RPWM.
Default: 0.0
Settings 0.0–4.0 kHz
Pr.00-17 = 4 kHz, 8 kHz: the setting range is 0.0–2.0 kHz
Pr.00-17 = 5–7 kHz: the setting range is 0.0–4.0 kHz
When the RPWM function is enabled, the minimum carrier frequency setting for Pr.00-17 is 3 kHz,
and the maximum is 9 kHz.
Pr.00-34 is valid only when the RPWM function is enabled (Pr.00-33 ≠ 0).
When the RPWM function is enabled and Pr.00-17 is set to 4 or 8 kHz, the setting range for
Pr.00-34 is 0.0–2.0 kHz (± 1 kHz).
Example:
When Pr.00-17 = 4 kHz, Pr.00-33 is enabled (= 1, 2, or 3), Pr.00-34 = 2.0 kHz, then the carrier
frequency outputs on the basis of 4 kHz, and the random frequency distribution tolerance is ± 1
kHz, that is, the carrier frequency randomly fluctuates from 3 kHz to 5 kHz.
When Pr.00-17 = 4 or 8 kHz, the maximum setting for Pr.00-34 is 2.0 kHz (± 1 kHz). The carrier
frequency fluctuation range is according to the diagram below.
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