Vector Control - IMO HD2 IP Series Instruction Manual

HD2 IP55 High-ingress Protection Series Inverters

5.5.3 Vector control

Asynchronous motors are featured with high order, non-linear, strong coupling and multi-
variables, which makes it very difficult to control asynchronous motors during actual application.
The vector control theory aims to solve this problem through measuring and controlling the
stator current vector of asynchronous motor, and decomposing the stator current vector into
exciting current (current component which generates internal magnet field) and torque current
(current component which generates torque) based on field orientation principle, and then
controlling the amplitude value and phase position of these two components (namely, control
the stator current vector of motor) to realize decoupling control of exciting current and torque
current, thus achieving high-performance speed regulation of asynchronous motor.
The HD2IP series inverter carries built-in speed sensor-less vector control algorithm, which can
be used to drive the asynchronous motor and permanent-magnet synchronous motor
simultaneously. As the core algorithm of vector control is based on accurate motor parameter
model, the accuracy of motor parameters will impact the control performance of vector control.
It is recommended to input accurate motor parameters and carry out motor parameter
autotuning before vector operation.
As vector control algorithm is complicated, users should be cautious of regulation on dedicated
function parameters of vector control.
Function
code
P00.00
Name
Speed control mode
Description
0: SVC 0
1: SVC 1
2: SVM
3: VC
Note: If 0, 1 or 3 is selected, it is required
to carry out motor parameter autotuning
first.
-50-
Basic Operation Instructions
Default
value
2