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 NKDS01-100
Display operation panel NKDO01-5
Display operation panel NKDO01-2
Display operation panel NKCS01-10
Display operation panel NKCL01-7
Display operation panel NKCL01-6
Display operation panel NKCL01-33
Display operation panel NKCL01-20
Display operation panel NKCL01-10
Display operation panel NKAS11-15
Display operation panel NKAS11-12
Display operation panel NKAS01-9
Display operation panel NKAS01-8
Display operation panel NKAS01-15
Display operation panel NKAS01-13
Display operation panel NKAS01-12
Display operation panel NKAS01-11
Display operation panel NKAS01-10
Display operation panel NIS21
Display operation panel NIRL03
Display operation panel NIRL01
Display operation panel NIPL01
Display operation panel NIOX01
Display operation panel NIOP02
Display operation panel NINT-64
Display operation panel NIMP02
Display operation panel NIMP01
Display operation panel NIMP01
Display operation panel NIMP01
Display operation panel NIMF02
Display operation panel NIMF01
Display operation panel NIDS01
Display operation panel NIDO01
Display operation panel NIDI01
Display operation panel NICS01
Display operation panel NICL01
Display operation panel NIAO01
Display operation panel NIAM02
Display operation panel NIAM01
Display operation panel NIAI05
Display operation panel NIAI04
Display operation panel NIAI03
Display operation panel NIAI02
Display operation panel NIAI01
Display operation panel NIA001
Display operation panel NHSS01
Display operation panel NGCM02
Display operation panel NGCM01
Display operation panel NFTP01
Display operation panel NFTP01
Display operation panel NFCS01
Display operation panel NFBA01
Display operation panel NFAN02
Display operation panel NFAN01
Display operation panel NF93A-2
Display operation panel Nextmove E100
Display operation panel NE870 3BSE080239R1
Display operation panel NDSO04
Display operation panel NDSO03
Display operation panel NDSO02
Display operation panel NDSO01
Display operation panel NDSM05
Display operation panel NDSM04
Display operation panel NDSM03
Display operation panel NDSM02
Display operation panel NDSM01
Display operation panel NDSI02
Display operation panel NDSI01
Display operation panel NDLS03
Display operation panel NDLS02
Display operation panel NDLS01
Display operation panel NDIS01
Display operation panel NDIO-02
Display operation panel NDCU-33CX 3AUA0000052751
Display operation panel NDCU-12C NDCU-12CK
Display operation panel NDCS03
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