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 07EA90-SI
Display operation panel 07EA90-S
Display operation panel 07EA80
Display operation panel 07EA65R1
Display operation panel 07EA62R1
Display operation panel 07EA60R1
Display operation panel 07EA200
Display operation panel 07DI92
Display operation panel 07DC92D GJR5252200R0101
Display operation panel 07DC91C
Display operation panel 07CS61
Display operation panel 07CR41
Display operation panel 07BV60R1
Display operation panel 07BT60R1
Display operation panel 07BR61R1 GJV3074376R1
Display operation panel 07BR61R1
Display operation panel 07BE62R1
Display operation panel 07BE61R1
Display operation panel 07BE60R1
Display operation panel 07BA60R1
Display operation panel 07AS82
Display operation panel 07AI91 GJR5251600R4202
Display operation panel 07AI91
Display operation panel 07AI91
Display operation panel 07AC91R101
Display operation panel 07AC91D GJR5252300R0101
Display operation panel 07AC91D
Display operation panel 07AC91D
Display operation panel 07AC91C
Display operation panel 07AC91B
Display operation panel 07AC91 GJR5252300R0101
Display operation panel 07AC91 ABB
Display operation panel 07AC91
Display operation panel 07AC91
Display operation panel 07AB90-S
Display operation panel 07AB67R1
Display operation panel 07AB61R1
Display operation panel 07AB60R1
Display operation panel 07AB200
Display operation panel 07AA80
Display operation panel 07AA65R1
Display operation panel 07AA63
Display operation panel 07AA62R1
Display operation panel 07AA61R1
Display operation panel 07AA60R1
Display operation panel 050992 OMNISKIP
Display operation panel 050745 EICB
Display operation panel 050581 RACSII 050328 LSDCM
Display operation panel 050581 BCI 050368 RING GENERATOR
Display operation panel 050546 DC/DC 050992 OMNISKIP
Display operation panel 050368 RING GENERATOR 050328 LSDCM
Display operation panel 050328 LSDCM
Display operation panel 050290 FXS
Display operation panel 050183 TCM4-4W
Display operation panel 050183 TCM4
Excitation system ABB module ZT372a-E
Excitation system ABB module ZMU-02内存卡
Excitation system ABB module YYT107A
Excitation system ABB module YYT102N
Excitation system ABB module YYT102M
Excitation system ABB module YYT102D
Excitation system ABB module YYT102C
Excitation system ABB module YYE109A
Excitation system ABB module YXU168E YT204001-JB/1
Excitation system ABB module YXU168E
Excitation system ABB module YXU168E
Excitation system ABB module YXI115B
Excitation system ABB module YXE152A YT204001-AF
Excitation system ABB module YXE152A
Excitation system ABB module YXC110
Excitation system ABB module YTEA250-8
Excitation system ABB module YTEA250-15
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