BENSHAW RSi H2 Series - V;F (Voltage;Frequency) Control

Parameter Descriptions
131
890053-00-02
Note
When the maximum frequency value is high, output frequency deviation may result due to
analog input variation and deviations in the calculations.
5.3.3 BAS-07 V/F (Voltage/Frequency) Control
Configure the inverter’s output voltages, slope, and output patterns to achieve a target output
frequency with V/F control. The amount of torque boost used during low frequency operations can
also be adjusted.
5.3.3.1 Linear V/F Pattern Operation
A linear V/F pattern configures the inverter output voltage and frequency to increase or decrease
at a fixed rate throughout the speed range. This V/F characteristic is referred to as a constant V/Hz
(or V/F) ratio and is applied to loads that require constant torque regardless of speed.
Group
Code
Name
LCD Display
Parameter Setting
Setting Range
Unit
DRV
09
Control mode
Control Mode
0
V/F
0–1
-
MOT
02
Base frequency
Base Freq
60.00
30.00–400.00
Hz
DRV
19
Start frequency
Start Freq
0.50
0.01–10.00
Hz
BAS
07
V/F pattern
V/F Pattern
0
Linear
0–3
-
Linear V/F Pattern Setting Details
Code
Description
MOT-02
Base Freq
Sets the base frequency. A base frequency is the inverter’s output frequency
when running at the motor’s rated voltage. Refer to the motor’s name plate to
set this parameter value.
DRV-19
Start Freq
Sets the start frequency. A start frequency is the frequency at which the
inverter starts to output voltage. If a deceleration stop is made while
operating above the start frequency, output voltage will continue until the
operating frequency reaches a full-stop (0 Hz).
3
M[Hz]+{M[Hz]*(G[%]*A[%])}
30Hz(M)+{30[Hz]x(50%(G)x40%(A))}=36Hz
4
M[Hz]+G[%]*2*(A[%]-50[%])[Hz]
30Hz(M)+50%(G)x2x(40%(A)–50%)x60Hz=24Hz
5
M[HZ]*{G[%]*2*(A[%]-50[%])}
30Hz(M)x{50%(G)x2x(40%(A)–50%)}=-3Hz(Reverse)
6
M[HZ]/{G[%]*2*(A[%]-50[%])}
30Hz(M)/{50%(G)x2x(60%–40%)}=-300Hz(Reverse)
7
M[HZ]+M[HZ]*G[%]*2*(A[%]-50[%])
30Hz(M)+30Hz(M)x50%(G)x2x(40%(A)–50%)=27Hz
• *M: main frequency reference (Hz or rpm)
• G: auxiliary reference gain (%)
• A: auxiliary frequency reference (Hz or rpm) or gain (%).
• **If the frequency setting is changed to rpm, it is converted to rpm instead of Hz.