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 DSPC3221
Display operation panel DSPC3122
Display operation panel DSPC3121
Display operation panel DSPC3001
Display operation panel DSPC174 3BSE005461R1
Display operation panel DSPC174
Display operation panel DSPC173
Display operation panel DSPC172H
Display operation panel DSPC172H
Display operation panel DSPC172-2
Display operation panel DSPC172
Display operation panel DSPC172
Display operation panel DSPC171 57310001-CC
Display operation panel DSPC171
Display operation panel DSPC170H
Display operation panel DSPC170
Display operation panel DSPC170
Display operation panel DSPC157
Display operation panel DSPC155
Display operation panel DSPC154
Display operation panel DSPC153
Display operation panel DSPC-150
Display operation panel DSPB120
Display operation panel DSPB112
Display operation panel DSPB110
Display operation panel DSPA110
Display operation panel DSO14
Display operation panel DSMD113 5736045-N/1
Display operation panel DSMD113
Display operation panel DSMD112
Display operation panel DSMD110
Display operation panel DSMC112 57360001-HC
Display operation panel DSMC112
Display operation panel DSMB340
Display operation panel DSMB178
Display operation panel DSMB176
Display operation panel DSMB175 57360001-KG
Display operation panel DSMB175 57360001-KG
Display operation panel DSMB-175
Display operation panel DSMB175
Display operation panel DSMB173
Display operation panel DSMB151
Display operation panel DSMB144
Display operation panel DSMB137
Display operation panel DSMB133 57360001-CY
Display operation panel DSMB133
Display operation panel DSMB127 57360001-HG
Display operation panel DSMB127
Display operation panel DSMB-126A
Display operation panel DSMB126A
Display operation panel DSMB125
Display operation panel DSMB124
Display operation panel DSMB123
Display operation panel DSMB116
Display operation panel DSMB115
Display operation panel DSMB-112
Display operation panel DSMB112
Display operation panel DSMB110
Display operation panel DSMB-02C
Display operation panel DSMB-01C ABB
Display operation panel DSMB-01C
Display operation panel DSMB-01C
Display operation panel DSMB-01C
Display operation panel DSMB-01C
Display operation panel DSIH900
Display operation panel DSIH75VF
Display operation panel DSIH72VR 57310290-RB
Display operation panel DSIH72VP
Display operation panel DSIH71BK01 5735099-CJ
Display operation panel DSIH71
Display operation panel DSIH700
Display operation panel DSIH 72VP ENOK
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