ABB INNPM12 infi90 output input module

ABB INNPM12 infi90 output input module

Direct Torque Control (DTC)

The ACS transmission control platform is based on ABB's highly acclaimed direct torque control

(DTC), can achieve the highest torque and speed performance that can be achieved by medium voltage frequency converters

Ability and minimum loss. The control of the frequency converter ensures real-time performance under all conditions

Peaceful and stable.

DTC can support precise control of motor speed and torque without coming from the motor shaft system

Pulse encoder feedback. In DTC, stator flux and torque are used as the main controls

Variables. The calculation of motor status is performed by a high-speed digital signal processor in advanced motor software modules

The model updates 40000 times per second (i.e. every 25 microseconds). Due to continuous updates on the motor status

The comparison between the new and actual values and the reference value is determined separately for each switching of the frequency converter. through

By switching power semiconductors only when necessary, DTC ensures absolute minimum loss.

Typical torque (T) response of DTC frequency converter and magnetic flux vector using open-loop pulse width modulation (PWM)

Compare quantity control

Quickly respond to power fluctuations and changes on the process side

The abnormally fast torque step response of a frequency converter refers to its ability to respond at an extremely fast speed

Respond to changes in process and power supply. This makes it easier to handle power loss situations and loads

The sudden change.

Power outage crossing

Due to its power outage ride through function, the frequency converter system can resist power supply interference. If

The input power supply voltage is cut off, and the frequency converter will continue to operate without generating torque

Run in mode. As long as the motor runs and generates electrical energy for the frequency converter, the frequency converter is in operation

In terms of activity status. When the power supply is restored, the frequency converter will be able to immediately resume normal operation.

Low number of components

The fewer components, the higher the reliability. ABB utilizes high-power semiconductor switching devices and energy

A topology structure that minimizes the number of components to the greatest extent possible.

No fuse design

ABB medium voltage frequency converters are designed to achieve safe operation without the use of fuses

The fuse is unreliable, expensive, and prone to aging. The design without fuses can reduce backup

The device should be able to quickly restart after overcurrent tripping.

No encoder

As is well known, encoders are prone to malfunction. The encoder is located on the motor and is vulnerable to attack

Location. ABB's medium voltage frequency converters can operate without encoders, thereby reducing

Maintain costs and ensure high reliability.