The Simple Mode Parameters In Detail; Torque Boost (Pr. 0); Minimum/Maximum Output Frequency (Pr. 1, Pr. 2) - Mitsubishi Electric FR-A800 Series Beginner's Manual

The simple mode parameters in detail

6.2 The simple mode parameters in detail
6.2.1

Torque Boost (Pr. 0)

Parameter 0 enables you to increase the output voltage at low output frequencies, which increases
the motor's torque. This function is useful in applications when you need high start-up torque at low
speeds.
Setting range
Parameter 0
6.2.2

Minimum/maximum output frequency (Pr. 1, Pr. 2)

The minimum and maximum output frequencies define the range within which the motor speed can
be adjusted with the frequency setting value.
You can use these two parameters to adjust the frequency setting range to match the mechanical
specifications of the connected system. For example, in many applications it is not desirable or pos-
sible to allow the drive to stop completely at the minimum setpoint value (output frequency = 0Hz).
At the other end of the scale you will often want to limit the maximum output frequency, and thus the
motor speed, so that you don't overstress the machine mechanically or exceed a maximum permitted
speed.
6 - 2
100 %
0
Output frequency (Hz)
Output frequency (Hz)
Pr. 1
Minimum output frequency
limit
You can use parameter 0 to achieve better
performance for starting the motor under
load. The base frequency is set in parameter 3.
Base
frequency
Pr. 2
0 —
0 — 10 V
4 mA — 20 mA
Maximum output frequency
limit
5 V
Frequency setpoint value
Parameter