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SPWM algorithm
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Application background Pulse modulation technology by certain rules to control the on-off of the switching element, to obtain a set of constant amplitude and width of the rectangular pulse waveform, is used to approximate sinusoidal voltage waveform. Pulse width modulation technology in Inverter Application in modern power electronics technology and the development of modern speed control system to play a great role in promoting. In recent years, the high frequency SPWM (sinusoidal pulse modulation) technology has been widely used in the motor control system due to the continuous emergence of the field control devices. Key Technology SPWM (Sinusoidal PWM) method is a relatively mature, the current use of a wide range of PWM. One of the important conclusions of the theory of sampling control is that the impulse is equal and the narrow pulse with different shapes and different shapes are basically the same as that in the process of inertia. S
行者少年 3 0
1
PWM control algorithm
4.0
Application background PWM control technology is one of the core technology of frequency conversion technology. From the initial use of analog circuit completed reference sine wave and triangular modulation, resulting in sinusoidal pulse modulation SPWM signal to control the switching of power devices begin, to present a full digital program, complete the optimization of real-time online PWM signal output, can be said that until now, PWM in various applications, still in a dominant position, and has been one of the hot. Key Technology PWM is a method of digital coding for analog signal level. By using the high resolution counter, Fang Bo's duty cycle is modulated to encode a specific analog signal level. PWM signal is still digital, because at any given time, the full magnitude of the DC power supply is either completely (ON), or no (OFF). The voltage or current source is a repetitive pulse sequence (ON) or off (OFF), which is applied to simulate
行者少年 0 0
1
Light intensity sampling and wireless data transmi
no vote
Application background Light intensity sampling and wireless data transmission and display on the LCD, the protocol is ZigBee communication protocol, the source code contains data sending and receiving. CC2530 applications in smart home is becoming more and more widely, and optical sampling and wireless display, is undoubtedly an important aspect of smart home. Key Technology & nbsp; to RF module using DMA mode data from memory to carry TXbuffer so as to realize the wireless transmission of real-time data as the application background, combined with the practice, give DMA using this configuration scheme and the modified SRCADDR after the value of re & amp; assignment DMAConfig[0] to DMA0CFG scheme, avoid using the DMA controller fault.
行者少年 0 0
1
AD sampling and wireless data communication and di
no vote
Application background CC2530 combines the excellent performance of the leading RF transceiver, the industry standard 8051 CPU, the system can be programmed to flash memory, RAM 8-KB and many other powerful features. The document contains the CC2530 based applications, there are AD sampling procedures and wireless data display to the LCD screen. Key Technology Powerful 5 channel DMA- 802.5.4 MAC IEEE timer, the general timer (a 16 bit timer, a 8 bit timer)- IR circuit- 32-kHz sleep timer with capture function- hardware support CSMA/CA
行者少年 0 0
1
UCOS_51 MCU program
no vote
Application background UCOS II is a open source, real-time system portability is very strong, which makes 51 MCU run up multi task, allowing you to write a program is more transplantation and help new easy-to-use 51 lovers quickly upgrade to a new stage. Data contains the source code, easy to view learning, but also contains the attention of the problem of uCOS transplantation. Key Technology UCOS_51 is based on the v2.52 MCS-51 uCOS-II series of series of advanced applications, the use of large models, in the Proteus simulation has been expanded SRAM 64KB. Learn from the idea of real-time operating system, so that more than 51 single chip running, code specifications and neat!
行者少年 0 0
1
Four rotor aircraft
no vote
Application background Four rotor aircraft design information, including the capacity of the design, control code reference, the use of all the chips, to improve the beginners very helpful. Four rotor aircraft applications have great market space in the aerial. Key Technology Four key points of the design of the rotor wing aircraft is also the key to the algorithm, the relevant source code can be reference for beginners to learn to use a lot of help.
行者少年 3 0
1
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