AI723F ABB Communication module control card

Description

Digital model: AI723F
Manufacturer: ABB
Weight: 1Kg
Shipping weight: 3Kg
Quantity: 19
Warranty：1 year
Imported: Yes
Available for sale: nationwide
Shipping term：DHL / FEDEX/ EMS /UPS/TNT/EMS

The measurement information from the motor is fed back to the motor model. The motor model is very complex, but only such a complex motor model can accurately calculate the motor data. Before running DTC drive, some parameters of the motor such as stator resistance, common impedance, saturation coefficient, etc. need to be input into the motor model. These parameters do not need to be manually input, but they will be automatically input into the motor model after we input the correct motor nameplate data into the frequency converter and then conduct motor identification operation. Of course, the identification of motor model parameters
It can also be carried out without rotating the motor rotor. That is to say, the identification operation of the motor can be conducted at zero speed
Complete, which makes DTC drive more widely used. However, if the control accuracy is required to be relatively high
Identify whether the operation should be completed at non-zero speed.
When the static accuracy is required to be lower than 0.5%, the DTC transmission device does not need encoder or tachometer. In fact
The static accuracy of 0.5% can meet the requirements of most industrial applications. Speed feedback not required is DTC drive area
An important characteristic different from other AC drives. In fact, the motor model is that DTC transmission is good at low speed
The key to good features.
The output control signal of the motor model directly reflects the actual torque and magnetic flux of the motor
The shaft speed is also completed in the motor model.
3. Torque comparator and flux comparator
The torque comparator and the magnetic flux comparator jointly output the pulse control information of the power element conduction.
In the comparator, the actual value of torque and magnetic flux is compared with the given value every 25 microseconds
The inter state is calculated by the double hysteresis control mode, which ensures the accuracy of the calculation and the stability of the controller.
After the signal is output from the two comparators, it goes to the next link – the optimized pulse selector.

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