Microchip dsPIC30F Application Note AN984 Using dsPIC30F MCU to Control AC Induction Motor

About this manual

The note provides a step‑by‑step example showing how a dsPIC30F MCU can be used to control an AC induction motor (ACIM). It lists the required hardware, including MPLAB ICD‑2, dsPICDEM MC1 and MC1H development boards, and a 3‑phase ACIM rated at 208/460 V.

Control is achieved by generating PWM signals that drive an inverter (SCR, MOSFET or IGBT) and by using a sine‑wave lookup table (64, 128 or 256 points) to produce the desired motor voltage waveforms. The document also covers phase‑shift techniques for multi‑phase operation, speed control via frequency and voltage adjustment, and safety considerations for motor slip and torque. This manual is written in Chinese.

What's inside

• Introduction
• Required Hardware
• Inverse Converter Circuit
• PWM Generation
• Sine Table Lookup
• Phase‑Shift for Multi‑Phase Motors
• Speed and Frequency Control
• Motor Slip and Torque
• VF Curve Characteristics
• Safety and Warranty Notice

Specifications

Frequently asked questions

What PWM frequency is recommended for driving the ACIM?

A carrier frequency of 16 kHz is used in the example.

What motor power range can be controlled with this application note?

The example supports motors from 16 HP up to 102 HP.