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 PFCL201C
Display operation panel PFCL 201CE-50
Display operation panel PFCA401SF 3BSE024387R4
Display operation panel PFBL141B-75KN
Display operation panel PFBL141B/C
Display operation panel PFBK165
Display operation panel PE1315A
Display operation panel PDX11-FBP.500
Display operation panel PDX11-FBP.300
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Display operation panel PDV12-FBP.0
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Display operation panel PDA11-FBP.050
Display operation panel PCO012
Display operation panel PCO012
Display operation panel PCO011
Display operation panel PCO011
Display operation panel PCO010
Display operation panel pci201-514d
Display operation panel PCI201-514
Display operation panel pci001-518d
Display operation panel PCI001-508D
Display operation panel PCD530A102 3BHE041343R0102
Display operation panel PCD244A101
Display operation panel PCD237A101 3BHE028915R0101
Display operation panel PCD235B1101 3BHE032025R1101
Display operation panel PCD235B1101 3BHE032025R1101
Display operation panel PCD235B101 3BHE032025R0101
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Display operation panel PCD235A101
Display operation panel PCD232A101 3BHE022293R0101
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Display operation panel PCD232 3BHE022293R0101
Display operation panel PCD232
Display operation panel PCD231B101 3BHE025541R0101
Display operation panel PCD231B101 3BHE025541R0101
Display operation panel PCD231B101
Display operation panel PCD230A101 3BHE022291R0101
Display operation panel PCD230A101
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Display operation panel PCD230A
Display operation panel PCD230
Display operation panel PCD230
Display operation panel P61615-0-1200000
Display operation panel P5EAa HENF206350R2
Display operation panel P4LQA HENF209736R0003
Display operation panel P3EDb HENF452778R1
Display operation panel P3ECa HENF315309R2
Display operation panel P3EB HENF315223R1
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Display operation panel P10800K02+HN800K02
Display operation panel OCAHG 492838402
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