DM300027 Microchip Technology, DM300027 Datasheet - Page 36

• Manufacturer Part Number: DM300027
• Description: BOARD DEV STARTER PIC24 28-PIN
• Manufacturer: Microchip Technology
• Type: MCUr

Specifications of DM300027

• Contents: Board, Cables, CD, Sample Part
• Processor To Be Evaluated: dsPIC30F/PIC24F/dsPIC33F
• Data Bus Width: 16 bit
• Interface Type: USB
• Silicon Manufacturer: Microchip
• Core Architecture: PIC, DsPIC
• Core Sub-architecture: PIC24, DsPIC30, DsPIC33
• Silicon Core Number: PIC24F, DsPIC30F, DsPIC33F
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: dsPIC30F/33F and PIC24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Summary
Many applications in the areas of motor control, power
control, Uninterruptible Power Supplies (UPS) and Switched
Mode Power Supplies (SMPS) demand a stable, regulated
DC power source with reduced input current harmonic
content and better power factor. The application solution
describes the efficient Average Current Mode Control using a
dsPIC® DSC to implement Power Factor Correction (PFC).
Capabilities of this Application Solution
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Summary
This application note describes a sensorless Brushless
Direct Current (BLDC) motor control algorithm that is
implemented using a dsPIC33F/E DSC. The algorithm
works utilizing a majority function for digitally filtering
the Back-Electromotive Force (BEMF). Each phase of the
motor is filtered to determine when to commutate the
motor drive voltages. This control technique excludes the
need for discrete, low-pass filtering hardware and off-chip
comparators.
Capabilities of this Application Solution
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Power Factor Correction Using dsPIC® DSCs
Application Note: AN1106 • Ready-to-Use Solution
Sensorless BLDC Control with Back EMF Filtering
Using a Majority Function
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Power factor correction up to 0.99
Implementation using output compare or motor control
PWM modules
Implementation on dsPIC30F and dsPIC33F family of
products
Voltage feed forward compensator implementation to
improve stability
Voltage and current PI control loops for better dynamic
response
Sensorless motor control
Simple and easy to implement and lower board cost
Can run the motors at very low speed
Majority function helps to improve transient response of
motor
Majority detect algorithm greatly eases motor tuning
process
Proven Software Source Code
Proven Software Source Code
Software Solutions and Tools for the 16-bit and 32-bit Designer
Application Note: AN1160 • Ready-to-Use Solution
dsPICDEM™ MCHV
Development Board
(DM330023)
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dsPICDEM™ MCLV
Development Board
(DM330021)
User configurable switching frequency, default frequency
of 80 kHz
Synchronization of PWM and ADC allowing low cost
current sensing
Program code size: 2 Kbytes
RAM used: 142 bytes
CPU usage: 10 MIPS