CN204334400U - A kind of signal sampling device controlled for motor in electric automobile - Google Patents
A kind of signal sampling device controlled for motor in electric automobile Download PDFInfo
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- CN204334400U CN204334400U CN201520052864.8U CN201520052864U CN204334400U CN 204334400 U CN204334400 U CN 204334400U CN 201520052864 U CN201520052864 U CN 201520052864U CN 204334400 U CN204334400 U CN 204334400U
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Abstract
Description
技术领域technical field
本实用新型属于一种电信号采装置，尤其涉及一种用于电动汽车电机控制的信号采样装置。The utility model belongs to an electrical signal sampling device, in particular to a signal sampling device used for electric vehicle motor control.
背景技术Background technique
对于电动汽车电机控制系统，实时准确的获得三相的电压、电流及速度等反馈信息是电机能否稳定运行与准确调速的关键，甚至是电动汽车动力性能优劣的关键。目前，针对诸如对永磁同步电机进行矢量控制时的控制系统环境复杂多变的情况，通常采用对输入信号的硬件滤波或者软件上的补偿，这种采样方法不能很好的抑制电气环境中的随机噪声，达到预期的采样和控制效果。For the electric vehicle motor control system, the real-time and accurate acquisition of three-phase voltage, current and speed feedback information is the key to the stable operation and accurate speed regulation of the motor, and even the key to the power performance of electric vehicles. At present, for the complex and changeable environment of the control system such as the vector control of the permanent magnet synchronous motor, hardware filtering or software compensation for the input signal is usually used. This sampling method cannot well suppress the noise in the electrical environment. Random noise, to achieve the expected sampling and control effect.
中国专利授权公告为：CN203722530U，公告日为：2014年7月16日实用新型专利公开了一种用变频空调、空调压缩机控制器及其电流采样电路，包括差分滤波模块、差分运放模块以及滤波模块的电流采样电路；所述差分滤波模块包括第一电阻R1、第一电容C1、第二电容C2、第三电容C3以及第二电阻R2；所述电路采样电路包括采样电阻；所述差分运放模块包括第三电阻R3、运算放大器以及第四电阻R4。该装置为解决采用永磁同步电机驱动的变频空调压缩机进行矢量控制采样精确度的问题，但其滤波方法简单，没有考虑周围复杂的电气环境产生的干扰，采样效果不理想。The Chinese patent authorization announcement is: CN203722530U, and the announcement date is: July 16, 2014. The utility model patent discloses an inverter air conditioner, an air conditioner compressor controller and its current sampling circuit, including a differential filter module, a differential operational amplifier module and The current sampling circuit of the filtering module; the differential filtering module includes a first resistor R1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a second resistor R2; the circuit sampling circuit includes a sampling resistor; the differential The operational amplifier module includes a third resistor R3, an operational amplifier and a fourth resistor R4. This device is to solve the problem of vector control sampling accuracy of frequency conversion air conditioner compressor driven by permanent magnet synchronous motor, but its filtering method is simple, without considering the interference generated by the surrounding complex electrical environment, and the sampling effect is not ideal.
实用新型内容Utility model content
本实用新型的目的是针对现有永磁同步电机控制中采样快速性和精确度的缺陷和不足，提供一种单元化、结构紧凑、滤波效果好的用于电动汽车电机控制的信号采样装置。The purpose of the utility model is to provide a unitized, compact structure and good filtering effect signal sampling device for electric vehicle motor control in view of the defects and insufficiencies of sampling speed and accuracy in the existing permanent magnet synchronous motor control.
为了实现上述目的，本实用新型采用的技术方案是：In order to achieve the above object, the technical solution adopted by the utility model is:
一种用于电动汽车电机控制的信号采样装置，包括多通道采集单元，信号处理单元，通信单元以及供电单元，其特点是：所述多通道采集单元输入端与全差分驱动电路的输出端相连，所述全差分驱动电路信号输入端用于连接电动汽车电机的反馈信号采集端；所述多通道采集单元输出端与所述信号处理单元连接，用于对反馈信号的处理，所述信号处理单元与所述通信单元相连，所述通信单元输出端用于连接电动汽车的电机控制器。A signal sampling device for electric vehicle motor control, including a multi-channel acquisition unit, a signal processing unit, a communication unit and a power supply unit, characterized in that: the input end of the multi-channel acquisition unit is connected to the output end of a fully differential drive circuit , the signal input end of the fully differential drive circuit is used to connect the feedback signal acquisition end of the electric vehicle motor; the output end of the multi-channel acquisition unit is connected to the signal processing unit for processing the feedback signal, and the signal processing The unit is connected to the communication unit, and the output end of the communication unit is used to connect the motor controller of the electric vehicle.
所述全差分驱动电路包括RC低通滤波器电路，全差分运放电路；所述信号处理单元包括存储器扩展电路，时钟复位电路以及DSP电源电路。The fully differential drive circuit includes an RC low-pass filter circuit and a fully differential operational amplifier circuit; the signal processing unit includes a memory expansion circuit, a clock reset circuit and a DSP power supply circuit.
所述通信单元包括CAN总线和UART，所述CAN总线实现与电动汽车电机控制器的，所述UART与上位机实现通信。The communication unit includes a CAN bus and a UART, the CAN bus communicates with the motor controller of the electric vehicle, and the UART communicates with the upper computer.
所述信号采样装置安装于电动汽车控制系统中，既能为电动汽车控制系统中的独立一个单元，亦可以嵌入电动汽车控制系统中。The signal sampling device is installed in the electric vehicle control system, and can be an independent unit in the electric vehicle control system, or can be embedded in the electric vehicle control system.
本实用新型的软件采用自抗扰控制技术中的跟踪微分器(TD)算法，将频率不同的被测信号从随机干扰信号与被测信号的混合信号中提取出来，并输出数字信号到电机控制器，实现电动汽车控制中电压、电流等多个信号的快速准确采样。The software of the utility model adopts the tracking differentiator (TD) algorithm in the active disturbance rejection control technology to extract the measured signals with different frequencies from the mixed signal of the random interference signal and the measured signal, and output the digital signal to the motor control It realizes fast and accurate sampling of multiple signals such as voltage and current in electric vehicle control.
本实用新型的有益效果是：The beneficial effects of the utility model are:
1、本实用新型采集电机环境中被测信号与随机干扰的混合信号，通过自抗扰技术中的数字滤波算法，有效去除随机干扰信号，获得快速、准确的反馈电信号，改善电机控制器的控制性能。1. The utility model collects the mixed signal of the measured signal and random interference in the motor environment, and effectively removes the random interference signal through the digital filtering algorithm in the active disturbance rejection technology, obtains fast and accurate feedback electrical signals, and improves the performance of the motor controller. control performance.
2、本实用新型集成度高、结构紧凑，既可以作为独立单元，亦可嵌入电机控制器中，适用范围广。2. The utility model has high integration and compact structure, and can be used as an independent unit or embedded in a motor controller, and has a wide range of applications.
附图说明Description of drawings
图1为本实用新型的系统结构示意图。Fig. 1 is a schematic diagram of the system structure of the present utility model.
图2为本实用新型输入信号及输出信号的比较图。Fig. 2 is a comparative diagram of the input signal and the output signal of the utility model.
具体实施方式Detailed ways
为了使本实用新型的目的、技术方案以及有点更加清晰，以下对其作进一步的详细描述：In order to make the purpose of the utility model, the technical scheme and a little clearer, it is described in further detail below:
参见图1和图2，本实用新型的一种用于电动汽车电机控制的信号采样装置，包括多通道采集单元2，信号处理单元3，通信单元7，供电单元6以及全差分驱动电路。所述多通道采集单元前端与所述全差分驱动电路相连，后端与信号处理单元连接，所述全差分驱动电路包括RC低通滤波器电路，全差分运放电路。Referring to Fig. 1 and Fig. 2, a signal sampling device for electric vehicle motor control of the utility model includes a multi-channel acquisition unit 2, a signal processing unit 3, a communication unit 7, a power supply unit 6 and a fully differential drive circuit. The front end of the multi-channel acquisition unit is connected to the fully differential driving circuit, and the rear end is connected to the signal processing unit. The fully differential driving circuit includes an RC low-pass filter circuit and a fully differential operational amplifier circuit.
所述信号处理单元包括存储器扩展电路，时钟复位电路，信号处理单元通过所述通信单元将反馈数字信号输出至电动汽车的电机控制器以及上位机。所述通信单元包括CAN与UART，CAN通信实现与电动汽车电机控制器传送数字信号，UART与上位机通信。The signal processing unit includes a memory expansion circuit and a clock reset circuit, and the signal processing unit outputs the feedback digital signal to the motor controller and the upper computer of the electric vehicle through the communication unit. The communication unit includes CAN and UART, the CAN communication realizes the transmission of digital signals with the motor controller of the electric vehicle, and the UART communicates with the upper computer.
所述供电单元6包括隔离型DC-DC单元。The power supply unit 6 includes an isolated DC-DC unit.
所述全差分驱动电路模拟输入信号连接于永磁同步电机I/V反馈采集端，所述信号处理单元数字输出信号连接于电机控制器。The analog input signal of the fully differential drive circuit is connected to the I/V feedback acquisition terminal of the permanent magnet synchronous motor, and the digital output signal of the signal processing unit is connected to the motor controller.
在电动汽车电机控制系统中，除了由于电机矢量控制引起的高频干扰，还有由于测量系统内部引起的扰动(如传感器与其他电子器件)，以及环境因素引起的干扰(如测量温度等)。对于高频干扰，可以采用窄带滤波的方法去除，而对于具有不确定性的随机噪声则需要一种性能较好的滤波方法。In the electric vehicle motor control system, in addition to the high-frequency interference caused by the motor vector control, there are also disturbances caused by the internal measurement system (such as sensors and other electronic devices), and interference caused by environmental factors (such as measuring temperature, etc.). For high-frequency interference, narrow-band filtering can be used to remove it, while for random noise with uncertainty, a filtering method with better performance is needed.
本实用新型的工作原理如下：通过前端信号调理与采集单元得到被测信号和干扰信号的混合信号，将模拟量转化为数字量，再根据自抗扰技术，提取被测信号的数字量，直接输出到电机控制器的反馈检测单元。The working principle of the utility model is as follows: the mixed signal of the measured signal and the interference signal is obtained through the front-end signal conditioning and acquisition unit, the analog quantity is converted into a digital quantity, and then the digital quantity of the measured signal is extracted according to the self-disturbance rejection technology, directly Output to the feedback detection unit of the motor controller.
本实用新型将信号调理与采集单元安装于电动汽车电机控制系统的I/V反馈处，独立一个处理单元对被测信号做数字处理，软件上采用自抗扰控制技术中的微分跟踪(TD)算法，将频率不同的被测信号从随机干扰信号与被测信号的混合信号中提取出来，并输出数字信号到电机控制器，实现电动汽车控制中电压、电流等多个信号的快速准确采样。In the utility model, the signal conditioning and acquisition unit is installed at the I/V feedback of the motor control system of the electric vehicle, and an independent processing unit performs digital processing on the measured signal, and the differential tracking (TD) in the active disturbance rejection control technology is adopted in the software The algorithm extracts the measured signals with different frequencies from the mixed signal of the random interference signal and the measured signal, and outputs the digital signal to the motor controller to realize the rapid and accurate sampling of multiple signals such as voltage and current in electric vehicle control.
本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。The content not described in detail in this specification belongs to the prior art known to those skilled in the art.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107645A1 (en) * | 2015-12-25 | 2017-06-29 | 北京新能源汽车股份有限公司 | Phase current signal sampling method and apparatus, electric motor controller and electric vehicle |
| CN114596833A (en) * | 2022-03-13 | 2022-06-07 | 哈尔滨理工大学 | Multi-point synchronous acquisition circuit, key unit and noise suppression method for fan noise in base station |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107645A1 (en) * | 2015-12-25 | 2017-06-29 | 北京新能源汽车股份有限公司 | Phase current signal sampling method and apparatus, electric motor controller and electric vehicle |
| CN114596833A (en) * | 2022-03-13 | 2022-06-07 | 哈尔滨理工大学 | Multi-point synchronous acquisition circuit, key unit and noise suppression method for fan noise in base station |
| CN114596833B (en) * | 2022-03-13 | 2024-06-11 | 哈尔滨理工大学 | Base station fan noise multipoint synchronous acquisition circuit, key unit and noise suppression method |
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