NXP LPC15xx系列MCU马达控制方案

NXP公司的LPC15xx系列是基于72MHz的ARM Cortex-M3内核的MCU,采用三级流水线和哈佛架构,集成了256KB闪存,32KB ROM，4KB EEPROM和多达36KB SRAM，以及多种外设,主要用在嵌入应用如马达控制,太阳能逆变器,家用电器,医疗设备,建筑物和工厂自动化,数字电源.本文介绍了LPC15xx主要特性,框图和LPCXpressoBLDC马达控制板主要特性和电路图.

The LPC15xx are ARM Cortex-M3 based microcontrollers for embedded　applications featuring a rich peripheral set with very low power consumption. The ARM Cortex-M3 is a next generation core that offers system enhancements such as enhanced debug features and a higher level of support block integration.

The LPC15xx operate at CPU frequencies of up to 72 MHz. The ARM Cortex-M3 CPU incorporates a 3-stage pipeline and uses a Harvard architecture with separate local instruction and data buses as well as a third bus for peripherals. The ARM Cortex-M3 CPU also includes an internal prefetch unit that supports speculative branching.

The LPC15xx includes up to 256 kB of flash memory, 32 kB of ROM, a 4 kB EEPROM,and up to 36 kB of SRAM. The peripheral complement includes one full-speed USB 2.0 device, two SPI interfaces, three USARTs, one Fast-mode Plus I2C-bus interface, one C_CAN module, PWM/timer subsystem with four configurable, multi-purpose State Configurable Timers (SCTimer/PWM) with input pre-processing unit, a Real-time clock module with independent power supply and a dedicated oscillator, two 12-channel/12-bit,2 Msamples/s ADCs, one 12-bit, 500 kSamples/s DAC, four voltage comparators with internal voltage reference, and a temperature sensor. A DMA engine can service most peripherals.

LPC15xx主要特性：
 System:
 ARM Cortex-M3 processor (version r2p1), running at frequencies of up to 72 MHz.
 ARM Cortex-M3 built-in Nested Vectored Interrupt Controller (NVIC).
 System tick timer.

低压高频CMOS电流乘法器原理图低压高频CMOS电流乘法器原理图通过调节跨导参数k和参数a，来调节乘法器的增益。参数k和MOS管的尺寸直接相关。减小跨导参数k或MOS管的尺寸，带来了较高的增益和较低的功耗，同时由于与MOS管相关的较

正弦波电压变大，变压器畸变电流急剧增加，请大神分


电路图如上，正弦波频率9KHz，正弦波幅值增加的时候，流过线圈1-3的电流急剧增加，请各位大神分析一下原因。


上传几张波形图：










CH1:变压器1脚和

电弧产生原理图电弧产生原理图也是一个简易高压发生器电路，使用一块固定频率脉宽调制电路TL494 产生方波信号控制MOS 管Q1，Q1 上的交变电流在通过串联的黑白电视机高压包T 的时候升压到2k~10kV，升压后经

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