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.

Company advantage service:
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems

All kinds of module card driver controller servo motor servo motor embedded card wires and cables Power module control module is applicable to steel, hydropower, nuclear power, power generation, glass factory, tire factory, rubber, thermal power, paper making, shipping, navigation, etc

ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit

Main products:
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P0911RS Module base supply

Description

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