【国民技术M4内核热销款N32G45XVL评估】第四篇三相BLDC电机”六步”控制波形生成

oxygen_sh 发表于 2022-2-13 23:12

本实验是使用TIM1产生三相BLDC电机控制控制波形，也就是所谓的六步换向控制波形。

N32G45的TIM1输出信号及影像关系如下表。在N32G45XVL-STB板上选择最后一组端口映射来输出PWM信号。

 

  

下面是实验代码：

端口配置

<pre>
<code>void GPIO_Conf(void)
{
GPIO_InitType GPIO_InitStructure;

RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_AFIO | RCC_APB2_PERIPH_GPIOE, ENABLE);

AFIO->RMP_CFG |= 0xC0;

GPIO_InitStructure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 ;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);

/* GPIOE Configuration: BKIN pin */
GPIO_InitStructure.Pin = GPIO_PIN_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitPeripheral(GPIOE, &GPIO_InitStructure);
}</code></pre>

TIM1 配置

<pre>
<code> /* Time Base configuration */
TIM_TimeBaseStructure.Prescaler = 0;
TIM_TimeBaseStructure.CntMode = TIM_CNT_MODE_UP;
TIM_TimeBaseStructure.Period = 4095;
TIM_TimeBaseStructure.ClkDiv = 0;
TIM_TimeBaseStructure.RepetCnt= 0;

TIM_InitTimeBase(TIM1, &TIM_TimeBaseStructure);

/* Channel 1, 2,3 and 4 Configuration in PWM mode */
TIM_OCInitStructure.OcMode = TIM_OCMODE_TIMING;
TIM_OCInitStructure.OutputState= TIM_OUTPUT_STATE_ENABLE;
TIM_OCInitStructure.OutputNState = TIM_OUTPUT_NSTATE_ENABLE;
TIM_OCInitStructure.Pulse = 2047;
TIM_OCInitStructure.OcPolarity = TIM_OC_POLARITY_HIGH;
TIM_OCInitStructure.OcNPolarity= TIM_OCN_POLARITY_HIGH;
TIM_OCInitStructure.OcIdleState= TIM_OC_IDLE_STATE_SET;
TIM_OCInitStructure.OcNIdleState = TIM_OCN_IDLE_STATE_SET;

TIM_InitOc1(TIM1, &TIM_OCInitStructure);

TIM_OCInitStructure.Pulse = 1023;
TIM_InitOc2(TIM1, &TIM_OCInitStructure);

TIM_OCInitStructure.Pulse = 511;
TIM_InitOc3(TIM1, &TIM_OCInitStructure);

/* Automatic Output enable, Break, dead time and lock configuration*/
TIM_BDTRInitStructure.OssrState = TIM_OSSR_STATE_ENABLE;
TIM_BDTRInitStructure.OssiState = TIM_OSSI_STATE_ENABLE;
TIM_BDTRInitStructure.LockLevel = TIM_LOCK_LEVEL_OFF;
TIM_BDTRInitStructure.DeadTime = 1;
TIM_BDTRInitStructure.Break = TIM_BREAK_IN_DISABLE; // TIM_BREAK_IN_ENABLE;
TIM_BDTRInitStructure.BreakPolarity = TIM_BREAK_POLARITY_HIGH;
TIM_BDTRInitStructure.AutomaticOutput = TIM_AUTO_OUTPUT_ENABLE;

TIM_ConfigBkdt(TIM1, &TIM_BDTRInitStructure);

TIM_EnableCapCmpPreloadControl(TIM1, ENABLE);

TIM_ConfigInt(TIM1, TIM_INT_COM, ENABLE);

/* TIM1 counter enable */
TIM_Enable(TIM1, ENABLE);

/* Main Output Enable */
TIM_EnableCtrlPwmOutputs(TIM1, ENABLE);</code></pre>

 

运行后结果：

CH1/2/3波形

  

CH1/2N/3N波形

  

 

波形满足要求，可以作为六步换向控制信号。

littleshrimp 发表于 2022-2-14 09:48

代码有种和STM32兼容的感觉

freebsder 发表于 2022-2-14 19:58

这个波形看起来生成的还不错

fxyc87 发表于 2022-2-22 10:45

赞，楼主只是单独生成波形？有电机实操么？学习中

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【国民技术M4内核热销款N32G45XVL评估】第四篇 三相BLDC电机”六步”控制波形生成

【国民技术M4内核热销款N32G45XVL评估】第四篇三相BLDC电机”六步”控制波形生成