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[原创] Microchip冰箱压缩机参考设计(RCDRD)

关键词:消费类电子 电冰箱 冰箱压缩机

时间:2020-03-18 11:15:51       来源:中电网

Microchip公司的冰箱压缩机参考设计(RCDRD)是采用dsPIC33EP64MC202 微控制器和PMSM马达,比传统的单相AC马达具有较高的效率和更低的噪音.典型冰箱电控系统有两个控制板:一个是冰箱系统控制,另一个是压缩机控制.冰箱压缩机开发参考设计(RCDRD)给工程师提供采用dsPIC®数字信号控制器(DSC)开发PMSM压缩机控制应用的机会,提供有竞争力无传感器控制解决方案,可用于内永磁同步马达(IPMSM)和表面永磁同步电动机(SPMSM)压缩机.两者都提供了硬件和软件解决方案.参考设计的额定输出电流为0.65A(RMS),工作电压187V-264V单相电压,连续输出功率大约为250W,峰值输出功率为350W.中电网为您整理如下详细资料,本文介绍了dsPIC33EP64MC202 微控制器主要特性和框图,以及冰箱压缩机开发板主要电指标,框图和电路图.

PMSM motor is getting widely used in household electric refrigerator compressors for its higher efficiency and lower noise over traditional single-phase AC motor. A typical refrigerator electrical control system has 2 control boards,one is for refrigerator system control, another for compressor control.

This Refrigerator Compressor Development Reference Design (RCDRD) is intended to aid the engineers to develop the PMSM compressor control application with dsPIC® Digital Signal Controllers (DSCs). This development Ref Design is targeted to provide a competitive sensor-less control solution applies to both Interior Permanent Magnet Synchronous Motor (IPMSM) and Surface Permanent Magnet Synchronous Motor (SPMSM) compressor. Both hardware and software are provided.

The rated continuous output current is 0.65A (RMS). This allows up to approximately 250W continuous output power when running from a 187V to 264V single-phase input voltage in room temperature environment. The peak output power is 350W for instantaneous high compressor pressure operation.

图1.冰箱压缩机参考设计外形图
Basic requirements

• Refrigerator Compressor Development Board (RCDB).
• MPLAB X V5.10 or later.
• Compiler XC16 V1.33 or later.
• PICkit™ 3 / PICkit™ 4 In-Circuit Debugger (Part Number: PG164130 / PG164140)

The RCDB is powered from 220V AC grid and controls the compressor motor with dsPIC33EP64MC202. The input 220V AC voltage is passed through the Filter & protection circuitry, and then converted to DC voltage by rectifier circuitry. An auxiliary power supply circuitry supplies non-isolated 15V and 3.3V voltage to MCU, feedback circuitry and three phases inverter bridge circuitry.

图2.冰箱压缩机开发板外形图

图3.冰箱压缩机开发板所有插座和LED指示器位置图
冰箱压缩机开发板主要电指标:


图4.冰箱压缩机开发板(RCDB)框图

图5.冰箱压缩机开发板(RCDB)功能模块
RCDB功能模块包括:


图6.冰箱压缩机开发板(RCDB)EMI滤波器和保护电路

图7.冰箱压缩机开发板(RCDB)整流器电路

图8.冰箱压缩机开发板(RCDB)辅助电源电路

图9.冰箱压缩机开发板(RCDB)通信端口电路

图10.冰箱压缩机开发板(RCDB)电路(1)

图11.冰箱压缩机开发板(RCDB)电路(2)

图12.冰箱压缩机开发板(RCDB)电路(3)

dsPIC33EP64MC202 微控制器(DSC)主要特性:

This document contains device-specific information forthe dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X and PIC24EPXXXGP/MC20X Digital SignalController (DSC) and Microcontroller (MCU) devices.

dsPIC33EPXXXMC20X/50X and dsPIC33EPXXXGP50Xdevices contain extensive Digital Signal Processor(DSP)functionality with a high-performance, 16-bitMCU architecture.

图13.dsPIC33EP64MC202 微控制器框图
Bit Microcontrollers and Digital Signal Controllerswith High-Speed PWM, Op Amps and Advanced Analog

dsPIC33EP64MC202 微控制器主要特性:

Operating Conditions
• 3.0V to 3.6V, -40℃ to +85℃, DC to 70 MIPS
• 3.0V to 3.6V, -40℃ to +125℃, DC to 60 MIPS
Core: 16-Bit dsPIC33E/PIC24E CPU
• 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
Clock Management
• 1.0% Internal Oscillator
• Programmable PLLs and Oscillator Clock Sources
• Fail-Safe Clock Monitor (FSCM)
• Independent Watchdog Timer (WDT)
• Fast Wake-up and Start-up
Power Management
• Low-Power Management modes (Sleep, Idle, Doze)
• Integrated Power-on Reset and Brown-out Reset
• 0.6 mA/MHz Dynamic Current (typical)
• 30 μA IPD Current (typical)
High-Speed PWM
• Up to Three PWM Pairs with Independent Timing
• Dead Time for Rising and Falling Edges
• 7.14 ns PWM Resolution
• PWM Support for:
- DC/DC, AC/DC, Inverters, PFC, Lighting
- BLDC, PMSM, ACIM, SRM
• Programmable Fault Inputs
• Flexible Trigger Configurations for ADC Conversions
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
- Six analog inputs on 28-pin devices and up to
16 analog inputs on 64-pin devices
• Flexible and Independent ADC Trigger Sources
• Up to Three Op Amp/Comparators with
Direct Connection to the ADC module:
- Additional dedicated comparator
- Programmable references with 32 voltage points
• Charge Time Measurement Unit (CTMU):
- Supports mTouch™ capacitive touch sensing
- Provides high-resolution time measurement (1 ns)
- On-chip temperature measurement
Timers/Output Compare/Input Capture
• 12 General Purpose Timers:
- Five 16-bit and up to two 32-bit timers/counters
- Four Output Compare (OC) modules, configurable
as timers/counters
- PTG module with two configurable timers/counters
- 32-bit Quadrature Encoder Interface (QEI) module,
configurable as a timer/counter
• Four Input Capture (IC) modules
• Peripheral Pin Select (PPS) to allow Function Remap
• Peripheral Trigger Generator (PTG) for Scheduling
Complex Sequences
Communication Interfaces
• Two UART modules (17.5 Mbps):
- With support for LIN/J2602 protocols and IrDA®
• Two 4-Wire SPI modules (15 Mbps)
• ECAN™ module (1 Mbaud) CAN 2.0B Support
• Two I2C™ modules (up to 1 Mbaud) with SMBus
Support
• PPS to allow Function Remap
• Programmable Cyclic Redundancy Check (CRC)
Direct Memory Access (DMA)
• 4-Channel DMA with User-Selectable Priority Arbitration
• UART, SPI, ADC, ECAN, IC, OC and Timers
Input/Output
• Sink/Source 12 mA or 6 mA, Pin-Specific for
Standard VOH/VOL, up to 22 or 14 mA, respectively
for Non-Standard VOH1
• 5V Tolerant Pins
• Peripheral Pin Select (PPS) to allow Digital Function
Remapping
• Selectable Open-Drain, Pull-ups and Pull-Downs
• Up to 5 mA Overvoltage Clamp Current
• Change Notification Interrupts on All I/O Pins
Qualification and Class B Support
• AEC-Q100 REVG (Grade 1, -40℃ to +125℃) Planned
• AEC-Q100 REVG (Grade 0, -40℃ to +150℃) Planned
• Class B Safety Library, IEC 60730
Debugger Development Support
• In-Circuit and In-Application Programming
• Two Program and Two Complex Data Breakpoints
• IEEE 1149.2 Compatible (JTAG) Boundary Scan
• Trace and Run-Time Watch
中电网为您整理如下详细资料详情请见:
http://ww1.microchip.com/downloads/en/DeviceDoc/Refrigerator%20Compressor%20Reference%20Design%20User%20Guide.pdf
http://ww1.microchip.com/downloads/en/DeviceDoc/70000657H.pdf
Refrigerator Compressor Reference Design User Guide.pdf
70000657H.pdf

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