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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H4136 HIMA H 4136 Relay amplifier in a terminal case
H4116 HIMA H 4116 Relay in terminal block case
H4122 HIMA H 4122 Relay in terminal block case
H7506 HIMA H 7506 Bus terminal
H7506 HIMA H 7506 Bus terminal
H7505 HIMA H 7505 Multifunctional interface converter
F8628X HIMA F 8628X communication module
F8628 HIMA F 8628 Ethernet communication
F8627X HIMA F 8627X ethernet module
F8627 HIMA F 8627 communication module
F8621A HIMA F 8621A Coprocessor module
F7131 HIMA F 7131 Power supply module
F7130A HIMA F 7130A Power supply monitoring with buffer batteries
F7126 HIMA F 7126 Power supply module
F7133 HIMA F 7133 Power distribution module
F6706 HIMA F 6706 2-fold Converter digital/analog
F6705 HIMA F 6705 2-fold Converter digital/analog
F6217 HIMA F 6217 8 fold analog input module
F6221 HIMA F 6221 Analog Input Module
F6220 HIMA F 6220 8 fold thermocouple input module
F6217 HIMA F 6217 8 fold analog input module
F6215 HIMA F 6215 analog input module
F6216 HIMA F 6216 8 fold analog input module
F6213 HIMA F 6213 4x analog input module
F6214 HIMA F 6214 4x analog input module
F3349 HIMA F 3349 digital output module
F3348 HIMA F 3348 digital output module
F3335 HIMA F 3335 digital output module
F3334 HIMA F 3334 4-channel output module
F3333 HIMA F 3333 4 fold output module
F3331 HIMA F 3331 8 fold output module
F3330 HIMA F 3330 8-channel output module
F3322 HIMA F 3322 16 fold output module
F5220 HIMA F 5220 2 fold counter module
F3248 HIMA F 3248 16-fold input module
F3240 HIMA F 32404 16-fold input module
F3237 HIMA F 3237 16-fold input module
F3224 A HIMA F3224A 4 16-fold input module
F3223 HIMA F 3223 4 fold input module
F3222 HIMA F 3222 digital input module
F3221 HIMA F 3221 16-fold input module
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