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.
Display operation panel DSIC111
Display operation panel DSI22
Display operation panel DSHM302
Display operation panel DSHM301
Display operation panel DSHM130
Display operation panel DSHM110
Display operation panel DSHM101
Display operation panel DSGC323
Display operation panel DSFS3001
Display operation panel DSFB112
Display operation panel DSF03SN-S
Display operation panel dse8610
Display operation panel DSDX-B001
Display operation panel DSDX454
Display operation panel DSDX453
Display operation panel DSDX452L
Display operation panel DSDX452
Display operation panel DSDX452
Display operation panel DSDX452
Display operation panel DSDX451L
Display operation panel DSDX451
Display operation panel DSDX404
Display operation panel DSDX404
Display operation panel DSDX403
Display operation panel DSDP451 57160001-X
Display operation panel DSDP301 57160001-LB
Display operation panel DSDP170/57160001-ADF
Display operation panel DSDP170 57160001-AOF
Display operation panel DSDP170 57160001-ADF
Display operation panel DSDP170
Display operation panel DSDP170
Display operation panel DSDP170
Display operation panel DSDP160
Display operation panel DSDP150 57160001-GE
Display operation panel DSDP150
Display operation panel DSDP150
Display operation panel DSDP140C 57160001-MP
Display operation panel DSDP140B 57160001-PU
Display operation panel DSDP140B 57160001-ACX
Display operation panel DSDP140B
Display operation panel DSDP140B
Display operation panel DSDP140A 57160001-KM
Display operation panel DSDP140A 57160001-ACT
Display operation panel DSDP110 57160001-DV
Display operation panel DSDON001
Display operation panel DSDO308 57160001-LV
Display operation panel DSDO305 57160001-CG
Display operation panel DSDO304 57160001-U
Display operation panel DSDO303 57160001-CS
Display operation panel DSDO301 57160001-CC
Display operation panel DSDO301
Display operation panel DSDO140 57160001-DO
Display operation panel DSDO131 57160001-KX
Display operation panel DSDO131
Display operation panel DSDO120 57160001-AX
Display operation panel DSDO120 57160001-AK
Display operation panel DSDO115A 3BSE018298R1
Display operation panel DSDO115A
Display operation panel DSDO115 57160001-NF
Display operation panel DSDO110 57160001-K
Display operation panel DSDO110
Display operation panel DSDI454 57160075-Y
Display operation panel DSDI453 57160075-AB
Display operation panel DSDI452 57160075E
Display operation panel DSDI452
Display operation panel DSDI451 57160075A
Display operation panel DSDI451
Display operation panel DSDI306 57160001-CM
Display operation panel DSDI304 57160001-DB
Display operation panel DSDI303 57160001-CX
Display operation panel DSDI301
Display operation panel DSDI146 3BSE007949R1
Display operation panel DSDI120AV1
Display operation panel DSDI120
Display operation panel DSDI110AV1/3BSE018295R1
Display operation panel DSDI110AV1 3BSE018295R1
Display operation panel DSDI110AV1
Display operation panel DSDI110AU1
Display operation panel DSD036S65U4031
Display operation panel DSCS150
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