CN201886332U - Power electronic control system based on MCU and FPGA - Google Patents

Abstract

A power electronic control system based on MCU and FPGA, including main system module, switching power supply module and signal conditioning module, the MCU chip and FPGA chip in the main system module are connected to form the processor structure of MCU+FPGA, and the periphery of the MCU chip is connected to the Flash chip , ADC circuit, CAN port, encoder interface, RS232 and RS485, SD/MMC card, ferroelectric memory, digital output, digital input and optical fiber interface, the main system module also has a power module, the power module is connected to the switching power supply module, ADC The circuit is connected to the signal conditioning module. The control system of the utility model has high-speed computing capability, good expansibility and reliability, and is widely applicable to the field of high-power electric electronics.

Description

A Power Electronic Control System Based on MCU and FPGA

technical field

The utility model relates to the field of high-power electric electronic control, in particular to a control system that can be widely used in the field of high-power electric electronic, which is a power electronic control system based on MCU and FPGA.

Background technique

High-power power electronics technology is the key to achieving high efficiency and energy saving, and it is also the technical basis for the development of smart grids. With the development of power electronics technology, objectively, the requirements for the real-time and robustness of the control system of power electronic devices are getting higher and higher, which also puts forward very high requirements for the design and development of the control system. At present, the development and design of high-power power electronic control systems are all aimed at specific applications, and the control systems designed in this way are not universal. At the same time, because the design work needs to consume a lot of manpower and financial resources, it also causes a waste of resources. The development of digital technology and the wide application of digital processors provide a good platform for the development of high-power power electronic control systems.

Contents of the invention

The problem to be solved by the utility model is: a universal power electronic control system is needed, which can realize reliable universal control of devices in the field of high-power power electronics, and better provide technical support for smart grids.

The technical solution of the utility model is: a power electronic control system based on MCU and FPGA, including a main system module, a switching power supply module and a signal conditioning module, the MCU chip and the FPGA chip in the main system module are connected to form a MCU+FPGA processor Structure, MCU chip peripheral connection Flash chip, ADC circuit, CAN port, encoder interface, RS232 and RS485, SD/MMC card, ferroelectric memory, digital output, digital input and optical fiber interface, the main system module also has a power module, The power supply module is connected to the switching power supply module, and the ADC circuit is connected to the signal conditioning module.

The Flash chip and the ADC circuit are connected to the FPGA chip and the MCU chip through the data address bus, the SD/MMC card is connected to the SPI communication port of the MCU chip, and the ferroelectric memory is connected to the I2C interface of the MCU chip.

The utility model adopts the MCU+FPGA processor architecture, the MCU chip mainly completes functions such as data collection, detection algorithm, and control algorithm, and the FPGA chip is responsible for PWM data generation and output, management and expansion of switching input and output, etc. The data interaction between MCU and FPGA is realized through the built-in dual-port RAM of FPGA. The signal conditioning circuit, digital output, digital input, and optical fiber interface can be expanded through connectors according to actual usage requirements.

The beneficial effects of the utility model are: the MCU+FPGA processor framework can well meet the real-time and reliability requirements of the high-power power electronic control system, and the set peripheral circuit makes the utility model universally applicable in the field of high-power power electronics , which saves the development cost of specially designed control system and speeds up the development cycle. The rich and expandable analog input, digital input and output ports and optical fiber interface can meet various requirements of high-power power electronic devices.

Description of drawings

Fig. 1 is a functional block diagram of the power electronic control system of the utility model.

Fig. 2 is a hardware structural diagram of the present utility model.

Fig. 3(a) is a schematic diagram of the power supply module in the main system module of the present invention.

Fig. 3 (b) is the schematic diagram of the MCU part in the main system module of the utility model.

Fig. 3 (c) is the schematic diagram of external expansion Flash chip, ferroelectric memory and SD/MMC in the main system module of the present utility model.

Fig. 3(d) is a schematic diagram of the interface of 485 in the main system module of the present invention.

Fig. 3(e) is a schematic diagram of the interface of the encoder in the main system module of the utility model.

Fig. 4 is the interface circuit diagram between the utility model MCU and ADC chip.

Fig. 5 is a schematic diagram of the digital quantity output part of the utility model.

Fig. 6 is a schematic diagram of the digital quantity input part of the utility model.

Fig. 7 is a schematic diagram of the optical fiber interface circuit of the present invention.

Detailed ways

The whole device of the utility model adopts the double processor structure of MCU+FPGA. The MCU adopts the latest high-speed floating-point processor TMS320C28346 of the C2000 series of TI Company, and the FPGA adopts the EP3C40 of the cyclone series of ALTERA Company. In data acquisition, three 6-input 16-bit high-speed ADC chips AD7656 can fully meet the precision and real-time requirements of high-power power electronic device control. Sufficient number of analog channels can not only collect input and output analog quantities, but also carry out remote DCS control.

Fig. 1 is a functional block diagram of the control system of the present invention, the MCU chip mainly completes functions such as AD control, speed measurement, control algorithm, and remote computer or PLC communication, and the FPGA chip is responsible for PWM data generation and output, optical fiber transceiver management, switching input and output processing, data buffering between MCU and FPGA, etc.

Fig. 2 is the hardware structural diagram that the utility model implements, and wherein comprises: comprise main system module, switching power supply module 18 and signal conditioning module 3, MCU chip 8 and FPGA chip 9 are connected to form the processor structure of MCU+FPGA in the main system module , MCU chip 8 peripheral connection Flash 4, ADC circuit 5, CAN port 6, encoder interface 7, RS232 and RS48510, SD/MMC card 11, ferroelectric memory 12, digital output 13, digital input 14 and optical fiber interface 16, the main The system module is also provided with a power module 17 , the power module 17 is connected to the switching power supply module 18 , and the ADC circuit 5 is connected to the signal conditioning module 3 . Flash 4 and ADC circuit 5 are connected with FPGA chip 9 and MCU chip 8 through data address bus 15, SD/MMC card 11 is connected with the SPI communication port of MCU chip 8, and ferroelectric memory 12 is connected with the I2C interface of MCU chip 8. The utility model MCU chip 8 is preferably a TMS320C28346 chip, and the FPGA chip 9 is an EP3C40 chip. The signal conditioning circuit 3, the digital output 13, the digital input 14, and the optical fiber interface 16 can be expanded through connectors according to actual usage requirements.

As shown in Figure 3(a), Figure 3(b), Figure 3(c), Figure 3(d), and Figure 3(e), the MCU chip TMS320C28346 passes the data bus A19-A0 and the address bus of the data address bus 15 D15-D0 is connected with external Flash chip SST39VF1601; connected with SD/MMC card through SPI-A; connected with ferroelectric memory chip FM24CL64 through I2C-A; connected with 485 interface circuit through SCI-A; connected with encoder through EQEPA module The interface is connected. Among them, the external Flash chip is used for the storage of MCU programs and data, the SD/MMC card is used for the recording and monitoring of operating data, the ferroelectric memory chip is used for the storage of important setting values of reused devices, and the 485 interface is used for remote monitoring of industrial sites. The encoder interface is used to measure the rotational speed of the motor for use in the control algorithm.

Figure 4 shows the interface circuit between ADC chip AD7656 and TMS320C28346. In order to facilitate the connection and data processing of the three ADC chips, the sampling pulses CONVSTA, CONVSTB, CONVSTC and chip select signal CS are processed by EP3C40 and then connected.

Figure 5, Figure 6, and Figure 7 show the digital output, digital input and optical fiber interface circuits respectively. They are connected with EP3C40, and can be expanded and used through connectors according to actual needs.

Claims (2)

1. power electronics control system based on MCU and FPGA, it is characterized in that comprising the main system module, switch power module (18) and signal condition module (3), MCU chip (8) and fpga chip (9) connect to form the processor structure of MCU+FPGA in the main system module, the peripheral Flash chip (4) that connects of MCU chip (8), adc circuit (5), CAN mouth (6), encoder interfaces (7), RS232 and RS485 (10), SD/MMC card (11), ferroelectric memory (12), numeral output (13), numeral input (14) and optical fiber interface (16), the main system module also is provided with power module (17), power module (17) connects switch power module (18), and adc circuit (5) connects signal condition module (3).

2. a kind of power electronics control system according to claim 1 based on MCU and FPGA, it is characterized in that Flash chip (4) is connected with MCU chip (8) with fpga chip (9) by data address bus (15) with adc circuit (5), SD/MMC card (11) is connected with the SPI communication port of MCU chip (8), and ferroelectric memory (12) links to each other with the I2C interface of MCU chip (8).

Images