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16-bit Product Family with Advanced Peripherals
Advanced Motor Control is bene?tted by the DSP resources found on the dsPIC? Digital Signal Controllers (DSCs). For
example, our sensorless ?eld-oriented control algorithm makes use of the single cycle MAC with data saturation, zero
overhead looping and barrel shifting to achieve stunning performance.
dsPIC?16-bit Digital Signal Controller Family
■ Large family of code and pin-compatible Flash devices
– The dsPIC30F device family offers 5V or 3.3V operation
and are available in 28, 40, 64 and 80-pin packages
– The dsPIC33F device family provides 3.3V operation and
are available in 20, 28, 44, 64, 80 and 100-pin packages
– Easy to migrate between family members
– Facilitates low-end to high-end product strategy
– Flash program memory for faster development cycles and
lower inventory cost
■ High Speed 16-bit CPU with complier-efficient architecture
– 40 MIPS operation dsPIC33F (30 MIPS operation on
dsPIC30F)
– Modified Harvard architecture for simultaneous data and
program access
– 16 x 16-bit general purpose registers for efficient
software operations
– Optimized for C code by design with industry-leading
efficiency
■ Built-in DSP engine enables high speed and precision PID
control loops
– Full featured DSP engine with two 40-bit accumulators for
multi-loop PID control
– Dual data fetches for single-cycle MAC instruction
support
– Hardware barrel shifter and single-cycle multiplier
– Saturation support, rounding modes, circular buffer and
modulo addressing modes for shorter control loops
■ Direct-Memory Access (DMA) (many dsPIC33F devices)
– Peripherals automatically store/retrieve data from RAM
without stealing cycles from the CPU
■ Single supply voltage rails eliminate extra voltage regulator
circuits
■ Precision High Speed Internal Oscillator eliminates external
crystal
■ Comprehensive System Integration Features
– Up to 4 Kbytes of Data EEPROM (dsPIC30F) for
non-volatile data storage
– High current sink/source I/O pins: 25 mA/25 mA
(dsPIC30F), 4 mA/4 mA (dsPIC33F)
– Flexible Watchdog Timer (WDT) with on-chip low-power RC
oscillator for reliable operation
– Power-on Reset (POR), Power-up Timer (PWRT) and
Oscillator Start-up Timer (OST)
– Fail-Safe clock monitor operation detects clock failure and
switches to on-chip low power RC oscillator (IEC 60730)
– Programmable code protection
– In-Circuit Serial Programming? (ICSP?)
– Selectable power-saving modes – Sleep, Idle and
Alternate Clock modes; Doze mode (dsPIC33F)
– Programmable Low-Voltage Detection (PLVD) (dsPIC30F)
– Programmable Brown-out Reset (BOR)
– Industrial and extended temperature ranges
■ MCPWM Module (MC Family)
– Dedicated time base with up to 8 PWM outputs
– Up to 4 complementary pairs for 3-phase control
– Independent output mode for BLDC Control
– Edge and center-aligned modes for quieter operation
– Programmable dead-time insertion with separate turn-on
and turn-off times
– Programmable A/D trigger for precise sample timing
– Up to 2 fault inputs to shutdown PWMs
– Multiple time bases (i.e., supports motor control and PFC)
■ PCPWM Module (GS Family)
– Up to 18-channels of independent PWMs supporting
different duty cycles and frequencies for each PWMH and
PWML pair
– Two Master Time Bases – support multiple 3-phase motors
– Improved PWM frequency of ~1 MHz at 10-bits of
resolution
– PWM frequency, duty cycle and phase shift resolution
of 1 ns
– PWM modes: edge-aligned, center-aligned, independent,
complementary, push-pull, multi-phase, variable phase,
current limit and current reset
– PWM output chopping feature – high frequency clock
chops up PWM signal for passage through a pulse
transformer
– Secondary ADC trigger enables two ADC sample requests
within a single PWM cycle
– Leading Edge Blanking (LEB) for internal comparators
and/or external inputs to the PWM module to prevent
fault signals during noisy MOSFET switching periods
– PWM time-base capture via an analog comparator or ext.
signal
– More fault and current limit inputs and improved flexibility
■ High-speed Analog-to-Digital Converter (ADC)
– Up to 16 channels, 10-bit resolution, 1.1 Msps (1 μs)
high speed conversion rate
– Up to 4 sample and hold circuits for simultaneous
sampling capability for all 3 phases
– Flexible sampling and conversion modes with 16 result
registers
– Monotonic with no missing codes
■ Up to 2 Quadrature Encoder Interfaces (QEI) for shaft
encoder inputs
– Programmable digital noise filters on input pins for
robustness against noise
– Full encoder interface support: A, B, index and up/down
■ Up to 4 comparators
– 20 ns response time for rapid response
– Programmable voltage reference
■ 12-bit A/D converter (up to 0.5 Msps operation)
■ Up to eight input capture, output compare, standard PWM
channels
■ Communication peripherals including UART, SPI, I 2 C? and
CAN
4
Motor Control Design Solutions
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相关PDF资料
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