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 NDBU-95C
Display operation panel NDBU-95C
Display operation panel NCTM01
Display operation panel NCPM01
Display operation panel NCOM04
Display operation panel NCOM03
Display operation panel NCOM02
Display operation panel NCOM01
Display operation panel NCNA-01
Display operation panel NCIS02
Display operation panel NCIS01
Display operation panel NBTM01
Display operation panel NBRA-658C
Display operation panel NBIO-21CU
Display operation panel NBIO-21C
Display operation panel NBIM02
Display operation panel NBIM01
Display operation panel NASO01
Display operation panel NASM04
Display operation panel NASM03
Display operation panel NASM02S
Display operation panel NASM02E
Display operation panel NASM02
Display operation panel NASM01
Display operation panel NASI02/F
Display operation panel NASI02
Display operation panel NAOM01
Display operation panel NAMU-01C 64702475D
Display operation panel NAMM03
Display operation panel NAMM02
Display operation panel NAMM01
Display operation panel NAIO-03
Display operation panel NAIO-03
Display operation panel NADS01
Display operation panel MX-CS101-401
Display operation panel MTB-01 3HNA006035-001
Display operation panel MSR04XI
Display operation panel MPRC086444-005
Display operation panel MPRC086444-005
Display operation panel MJFA9902
Display operation panel MFS3N-230V
Display operation panel MFPM02
Display operation panel MFE460A033BW
Display operation panel MEM86-3×192/CMBMR3
Display operation panel MDO32BNS
Display operation panel MDI32BIS
Display operation panel MCOB-02 3HNE09204-1/03
Display operation panel MCCB-02 3HNA001572-001
Display operation panel MCB-02 3HNA018575-001
Display operation panel MB810
Display operation panel MB801V512
Display operation panel MB510 3BSE044219DB
Display operation panel MB510 3BSE002540R1
Display operation panel MB510 3BSE002540R1
Display operation panel MAI32LAD
Display operation panel MAI32LAD
Display operation panel M3AA80B2
Display operation panel M2004HW
Display operation panel LXN1604-6
Display operation panel LWN2660-6EG
Display operation panel LWN2660-6E 3BHL000986P7002
Display operation panel LWN2660-6E
Display operation panel LWN2660-6
Display operation panel LWN1902-6
Display operation panel LTU-785
Display operation panel LTC745A101 3BHE039905R0101
Display operation panel LTC743CE22 3BHE013299R0022
Display operation panel LTC743CE 3BHE013299R0001
Display operation panel LTC743CE 3BHE013299R0001
Display operation panel LTC391AE01 HIEE401782R0001
Display operation panel LTC391AE01 HIEE401782R0001
Display operation panel LTC391AE01 HIEE401782R0001
Display operation panel LT8978BV1 HIEE320639R0001
Display operation panel LT8978bV1
Display operation panel LSP086388-001
Display operation panel LPS01
Display operation panel LMUSM02
Display operation panel LM80
Display operation panel LDSYN-101 3BHE005555R0101
Display operation panel LDSYN-101
Display operation panel LDSYN-101
Display operation panel LDSTA-01
Display operation panel LDSTA-01
Display operation panel LDMUI-01
Display operation panel LDMUI01
Display operation panel LDMUI01
Display operation panel LDMUI-001 61320946C
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