AN1857 Freescale Semiconductor / Motorola, AN1857 Datasheet - Page 9

• Manufacturer Part Number: AN1857
• Description: A 3-Phase ac Induction Motor Control System Based on the MC68HC908MR32
• Manufacturer: Freescale Semiconductor / Motorola

MR32 Control
Board
AN1857
MOTOROLA
For a more detailed description of the MR32 control board, refer to
Motorola’s Embedded Motion Control Series MR32 Control Board User’s
Manual (Motorola document order number MEMCMR32CBUM/D) that
comes with board (kit #ECCTR908MR32).
This document can also be downloaded from the web at
http://mcu.motsps.com/documentation/hc08/devhc08.html. The control
board is designed as an aid for hardware and software design of single,
3-phase, permanent magnet, brush and brushless dc motor drive
applications.
The control board does not contain the MR32 microcontroller. The
control board is designed to be directly connected to an MR32 EM
(emulator) board, which is part of an MMDS/MMEVS emulation system
connected by an impedance matched ribbon cable. A daughter board is
designed to house the MR32 and will plug into the control board in place
of the emulator cable. With the daughter board plugged into the control
board, standalone operation of the system is possible.
Because this application note is intended for use with a 3-phase ac
induction motor, only the circuitry resident on the MR32 control board
pertaining to the 3-phase ac motor is discussed here. Applications of the
control board with other types of motors are covered in additional
application notes.
control board.
Control board features include:
•
•
•
•
•
•
•
•
•
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
Six motor control PWM outputs with LED indicators
Speed control potentiometer
Optoisolated half duplex RS-232 interface
Start/Stop and forward/reverse switches
Hall effect inputs (for brushless dc motor control)
Back-EMF inputs (for brushless dc motor control)
Tachometer input configuration jumpers
2-position DIP switch for user option control
Emulator/Daughter board connectors
Processor reset switch
Two system fault inputs
Nine analog inputs
Go to: www.freescale.com
Figure 3
shows a complete block diagram of the
System Hardware
Application Note
9