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 SPBLK01
Display operation panel SPBLK01
Display operation panel SPA-ZC22
Display operation panel SPA-ZC22
Display operation panel SPA-ZC21
Display operation panel SPAU140C
Display operation panel SPAU140C
Display operation panel SPASO11
Display operation panel SPASO11
Display operation panel SPASO11
Display operation panel SPASO11
Display operation panel SPASI23
Display operation panel SPASI23
Display operation panel SPASI23
Display operation panel SPASI23
Display operation panel SPASI23
Display operation panel SPAM150C
Display operation panel SPAD346C3
Display operation panel SPAD346C
Display operation panel SPAD346C
Display operation panel SPAD346C
Display operation panel SPAD330C
Display operation panel SNAT7261 PCP
Display operation panel SNAT7261
Display operation panel SNAT634PAC
Display operation panel SNAT617CHC
Display operation panel SNAT617CHC
Display operation panel SNAT607MCI
Display operation panel SNAT605SDB
Display operation panel SNAT603CNT/61007041
Display operation panel SN:4910391523
Display operation panel SMU-03 3HNA03638-001/01
Display operation panel SMU-03 3HNA024411-001/00
Display operation panel SMU-03 3HNA013638-001/02
Display operation panel SMS01
Display operation panel SMB-01 3HNA006142-001
Display operation panel SM811K01 3BSE018173R1
Display operation panel SM811K01
Display operation panel SM811K01
Display operation panel SM811
Display operation panel SM810K01
Display operation panel SLC01-RE
Display operation panel SK829007-B
Display operation panel SK829007-B
Display operation panel SK829007-B
Display operation panel SK616001-A
Display operation panel SK616001-A
Display operation panel SINT4611C
Display operation panel SINT4510C
Display operation panel SER-740
Display operation panel SE99182066 DSDP170
Display operation panel SE96920414 YPK112A
Display operation panel SE96920414 YPK112A
Display operation panel SDN20-24-100C
Display operation panel SDN20-24-100C
Display operation panel SDI-03 3HNA001582-001/02
Display operation panel SDi-03 3HNA001582-001
Display operation panel SDCS-SNAT624
Display operation panel SDCS-POW-4-SD
Display operation panel SDCS-POW-4
Display operation panel SDCS-POW-1C
Display operation panel SDCS-POW-1
Display operation panel SDCS-PIN-4B
Display operation panel SDCS-PIN-48-SD
Display operation panel SDCS-PIN-48-SD
Display operation panel SDCS-PIN-48-COAT
Display operation panel SDCS-PIN-4
Display operation panel SDCS-PIN-205B
Display operation panel SDCS-PIN-205B
Display operation panel SDCS-IOE-2C
Display operation panel SDCS-IOE-1
Display operation panel SDCS-FEX-4A
Display operation panel SDCS-FEX-4
Display operation panel SDCS-FEX-2A
Display operation panel SDCS-CON-4
Display operation panel SDCS-CON-4
Display operation panel SDCS-CON-2B
Display operation panel SDCS-CON-2A
Display operation panel SDCS-CON-2A
Display operation panel SDCS-CON-2
Display operation panel SDCS-CON-1
Display operation panel SDCS-COM-81
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