Description
hardware flow control. It is an ideal choice in the field of industrial automation.
Distinguished according to whether there is a position sensor, first of all, it is divided into sensing
and non-sensing. That is, whether Hall or other similar position sensors are used to sense the
position angle of the stator and rotor. In air pump applications, many use non-inductive control.
The excellent algorithm of through-hole is that after the motor is running, it detects the changes in
phase current to switch the phase current. In some heavy-duty or precise control applications,
sensory methods are used.
According to the three-phase power supply of the inverter, it can be divided into square wave control
and sine wave control. The square wave control strategy is simple, and the control process is direct
and effective. It adopts a six-step commutation strategy. The CPU modulates the PWM to drive the
power switch tube to generate a three-phase power supply that can run the motor. The control strategy
of sine wave is relatively complex, but the control effect is much better.
In sine wave control, there are two main control strategies.
One is direct torque control DTC Baidu Encyclopedia. The method is to calculate the estimated values
of motor flux and torque based on the measured motor voltage and current. After controlling the torque,
the motor speed can also be controlled. Direct torque control is a patent of the European ABB company. .
The second is, space vector control FOC Baidu Encyclopedia. Its essence is to equate an AC motor to a DC
motor, and independently control the speed and magnetic field components. By controlling the rotor flux linkage,
and then decomposing the stator current, the two components of torque and magnetic field are obtained. After
coordinate transformation, the normal motor is realized. handover or decoupling control.
During sine wave control, there are many derived more sophisticated control strategies, such as feedforward
control, maximum torque control, field weakening control, etc.
In the process of controlling the motor, there are multiple feedback control loops. When controlling the output
of the motor, there is a current loop; on this basis, there is a control loop that controls the speed; when a servo
motor is used, there is a position loop control.
https://www.xmamazon.com
https://www.xmamazon.com
https://www.plcdcs.com/
www.module-plc.com/
https://www.ymgk.com
ABB CP450T-ETH 1SBP260189R1001
ABB 1SBP260188R1001
ABB CP450T
ABB CP450T 1SBP260188R1001
ABB 1SBP260187R1001
ABB CP440C-ETH
ABB CP440C-ETH 1SBP260187R1001
ABB 1SBP260197R1001
ABB CP435-T-ETH
ABB CP435-T-ETH 1SBP260197R1001
ABB 1SBP260197R1001
ABB CP435-ETH
ABB CP435-ETH 1SBP260197R1001
ABB 1SBP260195R1001
ABB CP430T
ABB CP430T 1SBP260195R1001
ABB CP430C
ABB CP430BP-ETH
ABB 1SBP260196R1001
ABB CP430B-ETH
ABB CP430B-ETH 1SBP260196R1001
ABB 1SBP260183R1001
ABB CP430-B
ABB CP430-B 1SBP260183R1001
ABB 1SBP260182R1001
ABB CP420-B
ABB CP420-B 1SBP260182R1001
ABB 1SBP260182R1001
ABB CP420B
ABB CP420B 1SBP260182R1001
ABB 1SBP260191R1001
ABB CP415M
ABB CP415M 1SBP260191R1001
ABB 1SBP260181R1001
ABB CP410M
ABB CP410M 1SBP260181R1001
ABB 1SBS260284R1001
ABB CP400
ABB CP400 1SBS260284R1001
ABB HIEE410730P201 AEND.:A
ABB HIEE305098R0001
ABB HIEE305098R0001 HIEE410730P201 AEND.:A
ABB UNS0007A-P V1 HIEE410730P201 AEND.:A
ABB UNS0007A-P V1 HIEE305098R0001
UNS0007A-P V1 HIEE305098R0001 HIEE410730P201 AEND.:A
ABB UNS0007A-P V1
ABB 3BHE029153R0101
ABB 3BHE029154P3 REV.G
ABB 3BHE029154P3 REV.G 3BHE029153R0101
Reviews
There are no reviews yet.