SJME-01AMC41-OY OMRON Servo Digital Motor Control AC Induction

SJDE-01APA

SJDE-02APA

SJDE-04APA

SJDE-04APA+SJME-04AMB41

SJDE-08APA

SJME-01AMA41

SJME-04AMA41

SJME-04AWA41

SJME-08AWA41

This application note describes the design of a 3-phase AC Induction Motor (ACIM) vector control drive with position encoder coupled to the motor shaft. It is based on Freescale’s 56F80x and 56F8300 dedicated motor control devices. The software design takes advantage of Processor ExpertTM (PE) software.

AC induction motors, which contain a cage, are very popular in variable-speed drives. They are simple, rugged, inexpensive and available at all power ratings. Progress in the field of power electronics and microelectronics enables the application of induction motors for high-performance drives, where traditionally only DC motors were applied. Thanks to sophisticated control methods, AC induction drives offer the same control capabilities as high performance four-quadrant DC drives.

This drive application allows vector control of the AC induction motor running in a closed-speed loop with the speed / position sensor coupled to the shaft. The application serves as an example of AC induction vector control drive design using a Freescale hybrid controller with PE support. It also illustrates the use of dedicated motor control libraries that are included in PE.

Advantages and Features of Freescale’s Hybrid Controller The Freescale 56F80x (56800 core) and 56F8300 (56800E core) families are well-suited for digital motor control, combining the DSP’s calculation capability with an MCU’s controller features on a single chip. These hybrid controllers offer many dedicated peripherals, including a Pulse Width Modulation (PWM) unit, an Analog-to-Digital Converter (ADC), timers, communication peripherals (SCI, SPI, CAN), on-board Flash and RAM. Generally, all the family members are appropriate for use in AC induction motor control. The following sections use a specific device to describe the family’s features.