共查询到18条相似文献,搜索用时 140 毫秒
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设计并制作了一个光伏发电三端口DC-DC 变换器,用于稳定输出给负载供电,并实现三端口的MPPT(最大功率点跟踪)。本设计由双向DC-DC电路、主稳压电路、驱动电路、辅助电源电路等多个电路构成,其中2个升-降压控制器LM5117为核心器件设计一套可以充放电的双向DC-DC电路、LT8705构成一个主稳压电路。为提高电压调整率、负载调整率、精准控制输出电压、MPPT,MCU采用32位ARM微控制器STM32F103,以7路AD采样(输入电压、输入电流、电池端电压、电池端电流、负载端电压、负载端电流、负载识别处理电路输出采集端口)作为反馈实时进行PID调节和模式切换。最终实现了系统总体效率超过96%,模式无缝切换和三端口的MPPT。 相似文献
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为了实现发动机转速均匀需要对其精确供油,设计了一种程控大功率可调稳压电源,给出了具体的软硬件设计方法。稳压电路的开关电源芯片LM2596ADJ反馈输出稳定电压,大功率扩流电路实现了电源的大电流驱动能力,控制器STM32和数字电位计AD5293组成的程控调节电路自主调节稳压电路的输出电压。最后,电路中补充完成了抗负载干扰电路的设计,较为明显地改善了电路的通用性、稳定性和抗干扰性。整个系统具有功耗低、体积小、成本低等特点。 相似文献
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基于PIC16F876的步进电机细分驱动电路设计 总被引:3,自引:0,他引:3
介绍了由PIC16F876控制的步进电机细分驱动电路的设计,该电路主要包括单片机控制电路、斩波电路、功率驱动电路及温度报警与限流电路等。给出了细分驱动电路的设计原理及其实现的方法,提出细分按照线性加正弦规律的方法输出阶梯电压,经脉宽调制(PWM)输出各相驱动信号,实现细分驱动信号波形。应用于天文望远镜的90BF003步进电机驱动,性能良好。 相似文献
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压电陶瓷驱动电源是压电陶瓷微位移器应用中的关键部件。PA85是一种高电压、高功率MOSFET的带宽运算放大器,采用双电源供电,输出电流高达200mA,输出电压更可高达±215V。该文详细介绍了基于PA85的一种电源复合放大器的设计及仿真,通过对各项性能指标的仿真表明,该驱动电源具有精度高、分辨率高、稳定性好、纹波小和电路结构简单等优点。 相似文献
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基于谐振调幅电压激励石英晶体微天平设计了一种分子键裂型生物传感系统.该传感系统通过Arduino控制数字信号发生器DDS 9854产生正弦波以激励9.98 MHz压电石英晶体.采用了自主振荡电路法和被动激励振荡法,在低振幅(2V)下以谐振电路法测定晶体谐振频率,通过高速继电器切换到被动调幅激励电路中,经数控放大器调节不同激励电压实现谐振调幅,增大石英晶体表面的剪切动量,从而实现分子键裂.随着调幅电压的升高,晶体表面物质的动量增加,导致分子键断裂,通过谐振电路频率和调幅电压值在数分钟内可得到晶体表面物质结合强度的信息.将传感系统应用于A型金黄色葡萄球菌细胞壁蛋白(蛋白质A)和免疫球蛋白IgG体系,在调幅电压激励下会抑制二者的结合.同时,在不同激励电压下可区分蛋白质A与IgG的结合强度. 相似文献
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设计了一种全桥单相数控低压变频逆变电源。该逆变电源由正弦波脉宽调制电路(SPWM)、IR2104驱动电路、全桥电路、LC低通滤波电路以及电压电流采样电路构成。通过STC8H单片机发出两路互补的SPWM波,再经过IR2104驱动模块得到四路互补的SPWM波,分别推挽驱动全桥电路中四个MOS管通断,从而完成直流电到交流电的转换,同时A/D实时监控逆变后输出电压、电流,主控制器得到反馈后通过闭环调节SPWM的占空比,控制输出电压、电流保护电路安全。通过实验验证表明该设计基本实现数字化控制指标要求,可调控输出电压0 V~36 V、可调控输出频率2 Hz~200 Hz。 相似文献
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驱动芯片L293的应用 总被引:1,自引:0,他引:1
毛元礼 《电子制作.电脑维护与应用》2007,(8):43-44
在智能机器人的设计中,要用到减速电机以实现其行走能力(这里的行走是指像车轮一样可以前后方向转动)。在设计的初始阶段,作者试图用晶体三极管电路来驱动电机的转动,在调试过程中发现用晶体三极管电路做的驱动电路输出能力有限,容易因负载较大而把晶体三极管烧坏。 相似文献
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《电子制作.电脑维护与应用》2017,(2)
此设计完成的是一个DC-DC稳流电源变换器,由电池组提供电源电压,通过LM2577-12升压电路将电源电压成倍提升,再将输出电压转换成3档不同大小的恒流输出,用此电流驱动LED发光。在整个电路工作的过程中,保证输出电压不高于10.5V,若小于等于10.5V时,系统自动报警。 相似文献
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在单一效应的MEMS振动驱动微能源的基础上,提出了一种MEMS压电-磁电复合振动驱动微能源器件。该微能源由八悬臂梁-中心质量块结构和永磁铁两部分组成,环境振动使中心质量块振动,PZT压电敏感单元由于压电效应产生电势差;同时中心质量块上集成的高密度线圈切割磁感线产生感应电动势,将压电转换与磁电转换相结合把振动能转换为电能。建立了该结构的数学模型并用有限分析软件Ansys12.0对该器件进行力学特性分析,最后对加工出的微能源进行性能测试。测试结果表明,该微能源谐振频率为8 Hz,易与环境发生共振;在共振条件下,施加1 gn 的加速度,器件压电发电开路输出电压峰峰值达154 mV,磁电发电开路输出电压峰-峰值达8 mV,有望为无线传感网络节点提供稳定的能源。 相似文献
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压电式双振子微型发电机功率调节电路设计 总被引:1,自引:0,他引:1
为克服压电式单振子微型发电机通过一般整流、滤波和储能控制电路不能连续为瞬时发射功率较大的无线传感器网络发射模块供电的问题,提出了一种双振子振动发电的结构思想,介绍了双振子振动发电原理;提出了一种双振子微型发电机输出功率调节控制电路技术方案,它由主一辅整流电路、主储能器、滤波器、辅助补充能量控制电路、稳压电路、滞回比较器、开关控制电路和电子开关等组成.经实验证明:封装了该功率调节电路的压电式双振子微型发电机平均输出功率为250~950 μw,瞬时输出功率可以达到680 mw,而自身的功耗只有40微瓦以下,能满足连续振动环境中微功耗电子器件、传感器或间歇式较大功耗遥测电路供电的要求. 相似文献
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Yongsong He Xiaosheng Wu Fu Zheng Wenyuan Chen Weiping Zhang Feng Cui Wu Liu 《Microsystem Technologies》2014,20(2):185-191
Piezoelectric solid-state micro gyroscope is a novel kind of rotating rate sensor, which is based on the special thickness-shear vibrating mode of a piezoelectric body. Compared with the general vibratory micro gyroscope, it has no evident mass-spring component in its structure, so it has larger stiffness and robust resistance to shake and strike. Therefore, piezoelectric solid-state micro gyroscope can be used in the high-g environment. In this paper, piezoelectric solid-state micro gyroscope working principle is described. The closed loop driving and detect circuit of piezoelectric solid-state micro gyroscope is proposed in order to track the resonance frequency drift, stabilize the driving voltage value and detect the gyroscope output. The closed loop driving circuit (CLDC) mainly contains phase lock loop circuit, automatic gain circuit. Detect circuit mainly contains de-modulator, difference amplifier, Phase shift circuit and low pass filter. Experimental results show that the frequency of CLDC fluctuates within ±15 Hz with the resonance frequency of 357.9 kHz when get its stable status and the fluctuation of reference voltage is within ±7 mv, while the fluctuation of reference voltage in open loop driving circuit is ±23 mv. In the experiment, the sensitivity of the gyroscope with 740 mv/rad/s is observed. The work in the paper provides the theoretical and experimental foundation for realizing for this kind of gyroscope. 相似文献
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具有升压、降压,能量双向流动的空间电源成为新型航天飞行器的研究热点和关键技术。本文设计一种20kW级多路双向半桥结构的空间电源,具有以下功能和特点:拓扑结构简单,采用PWM闭环控制,利用Boost电路升压,Buck电路降压,不仅能够实现能量双向流动,而且可适应不同工况,不同输入电压下可选择不同电压恒压输出,电压精度高,电流纹波较小,系统效率高,体积和重量小,具有故障保护功能,可靠性高。 相似文献
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Yuki Ishihara Yuka Naito Kazuaki Maezumi Yuki Okane Hirozumi Oku Masaki Tatani Minami Takato Ken Saito Fumio Uchikoba 《Artificial Life and Robotics》2016,21(2):201-206
This paper presented a driving circuit which can output a driving waveform of the piezoelectric element impact-type actuator. The piezoelectric element impact-type actuator generates the rotational movement which is necessary to move the legs of the micro electro mechanical systems (MEMS) microrobot. The MEMS microrobot is made from silicon wafers fabricated by micro fabrication technology. The size of the fabricated MEMS microrobot is 4.0 mm × 4.6 mm × 3.6 mm. The driving circuit consists of a bare chip IC of the pulse-type hardware neuron model (P-HNM) and a peripheral circuit. P-HNM is an electrical oscillating model which has the same basic features of biological neurons. Therefore, P-HNM can output the driving waveform of the piezoelectric element impact-type actuator using electrical oscillation as biological neuron. As a result, we showed that the driving circuit can output the driving waveform of the piezoelectric element impact-type actuator without using any software programs or analog digital converters. 相似文献
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Naruhiko Kasai Yasuyuki Kudo Masato Ishii Hiroshi Kageyama Hajime Akimoto Norihiro Nakamura Takao Onoye 《Journal of the Society for Information Display》2009,17(10):779-784
Abstract— An external driving circuit that has realized long lifetime, power‐consumption control, and peak luminance for organic light‐emitting diode (OLED) displays have been developed. This circuit realizes an effective method for constant‐anode‐voltage (CV) driving refered to as clamped inverter (CI) driving. The feature of CV driving is to achieve low‐power consumption compared with constant‐anode‐current (CC) driving and to control the power consumption and peak luminance according to the image because display luminance can be easily changed by controlling the anode voltage. On the other hand, CV driving has the problem that luminance deterioration appears to be serious compared with that of CC driving because the current of the OLED element decreases according to usage time. To cope with this, a lifetime compensation circuit that has increased the anode voltage so that it compensates for the luminance deterioration has been developed. This circuit can compensate not only the decrease in current but also the decrease in luminance at a constant current that CC driving cannot. However, increasing the anode voltage causes an increase in stress on the OLED element. The influence of stress on OLED lifetime was verified. As a result, it was confirmed that this circuit can extend the lifetime by 32% even if the anode voltage is increased, causing stress on the OLED structure. 相似文献