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.
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369-HI-R-0-0-0 GE relay
369-HI-R-0-0-0-0 GE Relay
369-HI-B-M-0-0 GE relay
369-H1-0-M-F-E-0 GE relay
369-H1-0-M-0-0-E GE relay
369-HI-0-B-F-D-0-E GE relay
369-HI-R-M-0-0-0-E GE relay
369-HI-R-M-0-0-0-0 GE relay
369-HI-R-0-0-0 GE relay
369-HI-0-M-F-E-0 GE relay
369-HI-0-M-0-0-0-E GE relay
369-HI-0-M-0-0-0 GE Motor management relay
369-HI-0-M-0-0 GE Motor protective relay
369-HI-0-0-0-0 GE Motor management
DS6800CCIE1F1D GE Power adapter
DS3800HPIB GE Circuit board
DS3800DFXA1B1C GE I/O module
DS215TCQAG1BZZ01A GE Circuit boards
DS215KLDCG1AZZ03A GE Turbine control system
DS215DMCBG1AZZ03A GE High speed electronic drive board
DS200UDSAG1ADE GE Gas turbine control
DS200TCTGG1AFF GE Simplex trip plate
DS200TCRAG1ACC GE Relay output board
DS200TCQCG1BKG GE Overflow plate
DS200TCQAG1BHF GE Analog I/O board
DS200TCPDG2BEC GE switchboard
DS200TCPDG1BEC GE switchboard
DS200TCEBG1ACE GE Emergency overdrive plate
DS200TCEAG1BNE GE Emergency overspeed plate
DS200TCCAG1BAA GE Simulate I/O modules
DS200TBQDG1AFF GE Extension termina
DS200TBQCG1AAA GE Analog terminal board
DS200SLCCG1AFG GE Control system
DS200SLCCG1AEE GE Local area Network (LAN) communication card
DS200SLCCG1ACC GE LAN communication card
DS200SIOBH1ACA GE Output terminal board
DS200SIOBH1ABA GE VME Stand I/O Card
DS200SIOBH1AAA GE I/O card
DS200SDCIG2AHB GE Dc power supply
DS200SDCIG2AEB GE Electrostatic sensitive device
DS200SDCIG1ABA GE Instrument board
DS200SDCCG5AHD GE Drive control card
DS200SDCCG1AGD GE Drive control panel
DS200SDCCG1AFD GE controller
DS200SDCCG1AEC GE Master controller
DS200RTBAG2AFB GE Trunk terminal board
DS200PCCAG1ABB GE Power card
DS200LPPAG1AAA GE Line protection panel
DS200LDCCH1ANA GE microprocessor
DS200L DCCH1AGA GE Drive control
DS200KLDBG1ABC GE Display Board
DS200IQXSG1AAA GE Line protection card
DS200IIBDG1A GE Insulated gate bipolar transistor
DS200FSAAG2ABA GE Power amplifier board
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