Chapter 12 Descriptions of Parameter Settings
MH300
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
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.
When the maximum setting for Pr.00-34 is 2.0 kHz (± 1 kHz). The carrier frequency fluctuation
range is according to the diagram below.
When the RPWM function is enabled and Pr.00-17 is set to 5, 6, or 7 kHz, the setting range for
Pr.00-34 is 0.0–4.0 kHz.
When the maximum setting for Pr.00-34 is 4.0 kHz (± 2 kHz). The carrier frequency fluctuation
range is according to the diagram below.
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.
To Next Page
Loading...
