A5 Control Optimization Parameter - Veikong VFD200A Series Operation Manual

100.0% corresponds to the rated torque of the inverter.
When the torque is set to 1~7 mode, 100% of communication, analog input and pulse input
correspond to the percentage of A0-03.0-01
Torque control forward
A0-05
maximum frequency
Torque control reverse
A0-06
maximum frequency
It is used to set the forward or reverse maximum running frequency of the inverter under the torque
control mode.
When the inverter torque is controlled, if the load torque is less than the motor output torque, the
motor speed will continue to rise. To prevent accidents such as flying in the mechanical system, the
maximum motor speed during torque control must be limited.
A0-07 Torque control acceleration time 0.00s～65000s
A0-08 Torque control deceleration time 0.00s～65000s
In the torque control mode, the difference between the motor output torque and the load torque
determines the speed change rate of the motor and the load, so the motor speed may change rapidly,
causing problems such as excessive noise or mechanical stress. By setting the torque control
acceleration/deceleration time, the motor speed can be changed gently.
However, for situations where fast
acceleration/deceleration time must be set to 0.00 s.

A5 Control optimization parameter

A5-00 DPWM switching upper limit frequency
Only valid for VF control. The wave-forming mode of the asynchronous machine VF is determined.
Below this value is the 7-segment continuous modulation mode, and the opposite is the 5-segment
intermittent modulation mode.
In the case of 7-segment continuous modulation, the switching loss of the inverter is large, but the
current ripple is small; in the 5-segment intermittent debugging mode, the switching loss is small and the
current ripple is large; but at high frequencies, it may cause The instability of the motor operation generally
does not need to be modified.
Please refer to function code P3-11 for VF operation instability. For function loss and temperature rise,
please refer to function code P0-15.
A5-01 PWM Modulation
Only valid for VF control. Synchronous modulation means that the carrier frequency changes linearly
with the output frequency conversion, ensuring that the ratio (carrier ratio) of the two is constant, and is
generally used when the output frequency is high, which is beneficial to the output voltage quality.
At lower output frequencies (below 100 Hz), synchronous modulation is generally not required
because the ratio of carrier frequency to output frequency is higher at this time, and the advantage of
asynchronous modulation is more obvious.
When the running frequency is higher than 85 Hz, the synchronous modulation takes effect, and the
frequency is fixed below the asynchronous modulation mode.
Chapter 6 Parameter Instruction
0.00Hz～Maximum frequency
0.00Hz～Maximum frequency
torque response is required,
0.00Hz～15.00Hz
0: Asynchronous modulation
1: Synchronous modulation
105
Default：50.00Hz
Default：50.00Hz
Default：0.00s
Default：0.00s
the torque control
Default：12.00
Default：0