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| Microchip dsPIC33EV系列低压马达驱动设计方案 |
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| 文章来源： 更新时间：2015/1/28 9:38:00 |
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Microchip公司的dsPIC33EVXXXGM00X系列是采用5V 70 MIPS dsPIC® DSC核的数字信号控制器(DSC),具有增强特性如CAN, SENT,高速PWM等外设和运放,误差修正码闪存等,支持32位乘法器,能用来控制BLDC,步进马达,交流电机,永磁电机,主要用在家用电器和汽车电子.本文介绍了dsPIC33EVXXXGM00X主要特性,框图和CPU核框图,以及dsPIC 33EV(DSC)低压马达控制开发套板如dsPIC® DSC信号板和马达控制10-24V驱动板主要特性,框图,电路图和PCB元件布局图.
Microchip’s dsPIC33EV family of digital signal controllers (DSCs) features a 5V 70 MIPS dsPIC® DSC core with enhanced on-chip features and is ideal for operating in harsh environments such as appliances and automotive applications. The 5V dsPIC33EV family comes with rich peripheral integration which includes CAN, SENT, High Speed PWMs, OP Amps and Error Correcting Code Flash for increased reliability and safety. The dsPIC33EV family of devices enable the design of high-performance, precision motor control systems that are more energy efficient. They can be used to control BLDC, permanent magnet synchronous, AC induction and stepper motors. These devices are ideal for automotive applications and high-performance general purpose applications.
dsPIC33EVXXXGM00X主要特性:
Operating Conditions
4.5V to 5.5V, -40ºC to +85ºC, DC to 70 MIPS
4.5V to 5.5V, -40ºC to +125ºC, DC to 60 MIPS
4.5V to 5.5V, -40ºC to +150ºC, DC to 40 MIPS
dsPIC33E Core
Code-Efficient (C and Assembly) Architecture
Two 40-Bit Wide Accumulators
Single-Cycle (MAC/MPY) with Dual Data Fetch
Single-Cycle, Mixed-Sign MUL plus Hardware Divide
32-Bit Multiply Support
Intermediate Security for Memory:
Provides a boot Flash segment in addition to the existing general Flash segment
Error Code Correction (ECC) for Flash
Added Two Alternate Register Sets for Fast Context Switching
High-Speed PWM
Up to Six Pulse-Width Modulation (PWM) Outputs (three generators)
Primary Master Time Base Inputs allow Time Base Synchronization from Internal/External Sources
Dead Time for Rising and Falling Edges
8.3 ns PWM Resolution at 60 MIPS,
16.6 ns Center-Aligned mode at 60 MIPS
PWM Support for:
DC/DC, AC/DC, inverters, Power Factor Correction (PFC) and lighting
Brushless Direct Current (BLDC), Permanent Magnet Synchronous Motor (PMSM), AC Induction Motor (ACIM), Switched Reluctance Motor (SRM)
Programmable Fault inputs
Flexible trigger configurations for Analog-to-Digital conversion
Independent Time Base
Supports PWM lock, PWM output chopping and dynamic phase shifting
Advanced Analog Features
ADC module:
Configurable as 10-bit, 1.1 Msps with four S&H or 12-bit, 500 ksps with one S&H
Up to 36 analog inputs
Flexible and Independent ADC Trigger Sources
Up to Four Op Amp/Comparators with Direct Connection to the ADC module:
Additional dedicated comparator and 7-bit Digital-to-Analog Converter (DAC)
Programmable references with 128 voltage points
Programmable blanking and filtering
Charge Time Measurement Unit (CTMU):
Supports mTouch™ capacitive touch sensing
Provides high-resolution time measurement (1 ns)
On-chip temperature measurement
Temperature sensor diode
Multiple sources of edge input triggers
Timers/Output Compare/Input Capture
Nine General Purpose Timers:
Five 16-bit and up to two 32-bit timers/counters, Timer3 can provide ADC trigger
Four Output Capture modules configurable as timers/counters
Four Input Capture modules
Communication Interfaces
Two Enhanced Addressable UART modules (6.25 Mbps):
Support for LIN/J2602 bus support and IrDA®
High and low speed (SCI)
Two SPI modules (15 Mbps):
25 Mbps data rate without PPS used
One I2C™ module (up to 1 Mbaud) with SMBus Support
Two SENT J2716 (Single Edge Nibble Transmission-Transmit/Receive) module for Automotive Applications
One CAN module:
32 buffers, 16 filters and three masks
Direct Memory Access (DMA)
4-Channel DMA with User-Selectable Priority Arbitration
Universal Asynchronous Receiver/Transmitter (UART), Serial Peripheral Interface (SPI), ADC, Input Capture, Output Compare and Controller Area Network (CAN)
Qualification and Class B Support
AEC-Q100 Rev G (Grade 1: -40ºC to +125ºC)
AEC-Q100 Rev G (Grade 0: -40ºC to +150ºC) Planned
Class B Safety Library, IEC 60730
Class B Fault Handling Support
Backup FRC
Windowed WDT uses LPRC
Windowed Deadman Timer uses System Clock (System Windowed Watchdog Timer)
H/W Clock Monitor Circuit
Oscillator Frequency Monitoring through CTMU
Dedicated PWM Fault Pin
Lockable Clock Configuration
图1. dsPIC33EVXXXGM00X框图
图2. dsPIC33EVXXXGM00X CPU框图
dsPIC 33EV(DSC)低压马达控制开发套板
The Low Voltage Motor Control Development Bundle provides a cost-effective method of evaluating and developing dual/single motor control power stage targeted to drive two Brushless DC (BLDC) motors or Permanent Magnet Synchronous Motors (PMSM) concurrently. The bundle comes with a dsPIC DSC Signal board, Motor Control 10-24V Driver Board and dsPIC33EP512GM710 Dual Motor Control PIM.
The dsPIC (DSC) Signal Board supports both 3.3V and 5V operated devices for various applications and frequently used human interface features along with the communication ports. The Signal Board has two major connectors, a 120-pin connector and a 60-pin connector to enable connection to the plug-in boards.
The Motor Control 10V–24V Driver Board (Dual/Single) along with the compatible dsPIC DSC Signal Board provides a software development platform to build and evaluate embedded motor control application software using Microchip’s high performance motor control Digital Signal Controllers (DSCs) and Microcontrollers (MCUs).
图3. dsPIC 33EV(DSC)低压马达控制开发套板外形图
dsPIC® DSC信号板
The dsPIC DSC Signal Board is a general purpose development board which provides the dsPIC DSC signal connections to application boards, along with user interfaces.
The board supports both +3.3V and +5V operated devices for various applications. The board has some frequently used user interface features, along with two major connectors: a 120-pin connector and a 60-pin connector to enable connection to plug-in boards. The 120-pin connector is connected to all PIM header pins, power supply signals and various grounds. The 60-pin connector allows expansion for communication, enhanced interfacing and light power applications.
dsPIC® DSC信号板主要特性:
• Interfaces:
- 120-pin power board interface connector for power application board (J13)
- 60-pin expansion connector for add-on boards (J7)
- 30-pin connector for signal monitoring or expansion (J4)
- 30-pin connector for signal monitoring or expansion (J5)
- 100/105-pin PIM header (U2A, U2B, U2C, U2D, U2E) support microcontroller and dsPIC DSC’s Plug-in Module (PIM) with internal or external op amp configuration
• User Interfaces:
- Reset push button (SW0)
- Four push buttons (SW1-SW4)
- Two 10 kW potentiometers (POT1 and POT2)
- Four LED indicators for debugging (LD1-LD4)
- Two power-on status LEDs (LD5, LD6)
- Two LED indicators for USB communications (LD7, LD8)
• Communication Ports:
- UART communication through USB (isolated) (J3)
- SPI interface (J8)
- PICkit™ serial analyzer (SPI protocol) interface (J10)
- PICkit serial analyzer interface (I2C™ protocol) (J12)
• Power Supply Connectors:
- 24V power input connector (J17)
• Programming Connectors:
- ICSP™ connector for programming the dsPIC DSC or microcontroller (J1)
- RJ11 connector for programming the dsPIC DSC or microcontroller (J2)
• Test Points:
- 20 test points (TP1-TP20) provided on the board for debugging and measurement
• Power:
- DC+, EXT DC+, DC24V, +5V, DVDD, AVDD
• Ground:
- Digital Ground (DGND), Analog Ground (AGND), Power Ground (PGND)
图4. dsPIC® DSC信号板外形图
The dsPIC DSC Signal Board has the following functions:
• Supports application power boards connected to the J13 and J7 connectors
• Experiments with functionality of devices on the PIM header
• Provides on-board user interface-like switches, LEDs and potentiometers
• Communicates with a host computer or external device through isolated USB, I2C and SPI interfaces
• Provides auxiliary power supply (DVDD = +3.3V or +5V) to various devices used on the dsPIC DSC Signal Board, as well as plug-in boards
• Provides a prototyping area for user circuit development or implementation
图5. dsPIC® DSC信号板框图
图6. dsPIC® DSC信号板电路图(1)
图7. dsPIC® DSC信号板电路图(2)
图8. dsPIC® DSC信号板电路图(3)
图9. dsPIC® DSC信号板电路图(4)
图10. dsPIC® DSC信号板电路图(5)
图11. dsPIC® DSC信号板PCB元件布局图
马达控制10-24V驱动板
The Motor Control 10-24V Driver Board (Dual/Single) is a low-voltage, dual motor control power stage, targeted to drive two Brushless DC (BLDC) motors or Permanent Magnet Synchronous Motors (PMSMs) concurrently.
The Motor Control 10-24V Driver Board (Dual/Single), along with the compatible dsPIC® DSC Signal Board, provides a software development platform to build and evaluate embedded motor control application software using Microchip’s high-performance motor control Digital Signal Controllers (DSCs) and Microcontrollers (MCUs).
马达控制10-24V驱动板主要特性:
• Two PMSM/BLDC motor control power stages with electrical specifications:
- Input DC voltage: 10-24V DC ±10% (9V-26.4V DC)
- Output phase RMS current: 10A nominal @ +25ºC per phase
• MCP8024 gate drivers with undervoltage, overvoltage, overcurrent, shoot-through and short-circuit protection
• Hall sensors/Quadrature Encoder Interface (QEI) in each motor control stage to enable sensor-based motor control algorithms
• Phase voltage and reconstructed neutral feedback signals in each motor control stage to enable sensorless BLDC operation
• DC bus current sense resistor for overcurrent protection, torque control of the BLDC motor and single-shunt Field Oriented Control (FOC) of PMSMs
• Phase current sensing resistors for Field Oriented Control
• DC bus voltage sensing
• Dynamic braking chopper circuit with hardware and software brake control for both the inverter stages
• Overcurrent protection
• LED indication for PWM signals and Power-on Status
图12.马达控制10-24V驱动板外形图
图13.马达控制10-24V驱动板框图
图14.马达控制10-24V驱动板电路图(1)
图16.马达控制10-24V驱动板电路图(2)
图17.马达控制10-24V驱动板电路图(3)
图18.马达控制10-24V驱动板PCB元件布局图
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