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 DSTA180
Display operation panel DSTA180
Display operation panel DSTA171
Display operation panel DSTA170
Display operation panel DSTA160
Display operation panel DSTA133I
Display operation panel DSTA131
Display operation panel DSTA131
Display operation panel DSTA-121A57120001
Display operation panel DSTA-121A
Display operation panel DSTA121
Display operation panel DSTA002
Display operation panel DSSS170
Display operation panel DSSR122M
Display operation panel DSSR122 ABB控制器
Display operation panel DSSR122 4899001-NK
Display operation panel DSSR122 48990001-NK
Display operation panel DSSR122 48990001-LH
Display operation panel DSSR122
Display operation panel DSSR122
Display operation panel DSSR121
Display operation panel DSSR120
Display operation panel DSSR116
Display operation panel DSSR115
Display operation panel DSSR110
Display operation panel DSSC-01C
Display operation panel DSSB170
Display operation panel DSSB146
Display operation panel DSSB145
Display operation panel DSSB140 48980001-P
Display operation panel DSSB140
Display operation panel DSSB140
Display operation panel DSSB120
Display operation panel DSSB110
Display operation panel DSSB-01C 3AFE68300746
Display operation panel DSSB-01C
Display operation panel DSSB-01C
Display operation panel DSSB-01C
Display operation panel DSSA165
Display operation panel DSSA165
Display operation panel DSSA165
Display operation panel DSRF197 3BSE019297R1
Display operation panel DSRF182K13
Display operation panel DSRF182AK02 3BSE014078R1
Display operation panel DSRF182
Display operation panel DSRF180M
Display operation panel DSRF180A 57310255-AV
Display operation panel DSRF180A
Display operation panel DSRF160M
Display operation panel DSRF160
Display operation panel DSRF154M
Display operation panel DSRF150
Display operation panel DSRC113
Display operation panel DSRB310
Display operation panel DSRB110
Display operation panel DSQT239
Display operation panel DSQS118
Display operation panel DSQC697
Display operation panel DSQC697
Display operation panel DSQC679 3HAC028357-001
Display operation panel DSQC679 3HAC028357-001
Display operation panel DSQC679
Display operation panel DSQC679
Display operation panel DSQC668 3HAC029157-001
Display operation panel DSQC668
Display operation panel DSQC664
Display operation panel DSQC663 3HAC0298180881
Display operation panel DSQC663 3HAC029818-001/14
Display operation panel DSQC663 3HAC029818-001
Display operation panel DSQC663
Display operation panel DSQC661 3HAC026253-001
Display operation panel DSQC661
Display operation panel DSQC659
Display operation panel DSQC658
Display operation panel DSQC658
Display operation panel DSQC653
Display operation panel DSQC652 3HNA025917-001
Display operation panel DSQC652
Display operation panel DSQC651
Display operation panel DSQC643 3HAC024488-001
Display operation panel DSQC639 3HAC025097-001
Display operation panel DSQC639
Display operation panel DSQC639
Display operation panel DSQC633
Display operation panel DSQC627 3HAC020466-001
Display operation panel DSQC627 3HAC020466-001
Display operation panel DSQC627
Display operation panel DSQC626A
Display operation panel DSQC626
Display operation panel DSQC626
Display operation panel DSQC611
Display operation panel DSQC611
Display operation panel DSQC609
Display operation panel DSQC609
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