Variable frequency AC drive control mode

Posted By veikong on August 9, 2017

Generally variable frequency AC drive has following control modes: open loop vector control, V/F control, open loop torque control, closed loop vector control, slip frequency control. Open-loop vector control Apply to high performance general-purpose application with no PG encoder, one AC drive controls an electric motor only. Such as machine tools, centrifuge machines, wire drawing …

AC drive inverter parameters setting (3)

Posted By veikong on

7. Torque limit It can be divided into drive torque limitation and brake torque limitation. It is based on the inverter output voltage and current values and calculates torque by CPU, to make the impact load recovery characteristics of the deceleration and constant speed running improved significantly. The torque limitation function can achieve automatic acceleration …

Variable speed drive parameters setting (2)

Posted By veikong on

Generally, there are dozens of function parameters in variable speed drive, or even hundreds for option. In practical application, it is not necessary to set every parameter, most parameters can be keep factory default settings. 1. Acceleration/deceleration time Acceleration time is the time required by output frequency from 0 Hz to the maximum frequency, deceleration …

Variable frequency drive parameters setting (1)

Posted By veikong on July 27, 2017

Lots of parameters need to be set in the variable frequency drive, and each parameter has a setting range, improper setting in individual parameter will result in the variable frequency AC drive can not work smoothly. Therefore, every parameter must have a correct setting to ensure the whole system operation security. 1. Control modes: Such …