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Description: 摘 要:目的分析一般单片机变频调速系统的特点，通过引入专用芯片SA4828改善控制性能。方法通过单片机与SA4828芯片相结合实现对交流异步机的变频调速，给出了硬件电路和软件设计流程。结果系统充分发挥了SA4828的自身特性，分担了部分控制工作，减轻了单片机的任务，单片机可余出机时备作它用，同时系统可靠性增加。结论相对于单纯的单片机控制变频调速系统，引入SA4828的系统控制效果更好。
-Abstract : analysis of the general purpose microcontroller Frequency Control System features By introducing ASIC SA4828 improve performance. By SA4828 chip microcontroller with the combination of AC induction machines VVVF, given the hardware and software design process. Results of the system into full play its characteristics of the SA4828, sharing some control work ease the task of microcontroller, microprocessor can Airport when I prepared for it and at the same time increasing system reliability. Conclusions for the simple microcontroller-control system, the introduction of the SA4828 system control better results.
Platform: |
Size: 173286 |
Author: 嵇辉辉 |
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Description: 摘 要:目的分析一般单片机变频调速系统的特点，通过引入专用芯片SA4828改善控制性能。方法通过单片机与SA4828芯片相结合实现对交流异步机的变频调速，给出了硬件电路和软件设计流程。结果系统充分发挥了SA4828的自身特性，分担了部分控制工作，减轻了单片机的任务，单片机可余出机时备作它用，同时系统可靠性增加。结论相对于单纯的单片机控制变频调速系统，引入SA4828的系统控制效果更好。
-Abstract : analysis of the general purpose microcontroller Frequency Control System features By introducing ASIC SA4828 improve performance. By SA4828 chip microcontroller with the combination of AC induction machines VVVF, given the hardware and software design process. Results of the system into full play its characteristics of the SA4828, sharing some control work ease the task of microcontroller, microprocessor can Airport when I prepared for it and at the same time increasing system reliability. Conclusions for the simple microcontroller-control system, the introduction of the SA4828 system control better results.
Platform: |
Size: 173056 |
Author: 嵇辉辉 |
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Description: 各功能描述:
1. 当A为低电平时,AC-3灯点亮,即是AC-3的输入方式 当A为高电平时,STEREO灯点亮,即是STEREO的输入方式
2. 当STANDBY灯点亮时，为待机状态；此LED闪动时为MUTE状态,PT2258为静音状态,同时STANDBY为低电平
3. 各声道（FRONT，SUB，REAR，CENT）其微调音量调节+/-5dB；音量调节从01~80dB
4. 面板无任何按键,均为遥控器控制
5. 刚开机时为待机状态，开机时音量为50dB状态,各微调为0dB,
6. 按遥控器的REST键后,系统为开机时状态，
7. PT2258音量衰减共80DB,按遥控器每按一次衰减1dB,
-Description of each function: 1. When A low when, AC-3 lights lit, that is, AC-3 input mode when A is high when, STEREO lights lit, that is, STEREO input 2. When the STANDBY lamp lit, for standby mode this LED flashing when the MUTE state, PT2258 for the mute state, at the same time STANDBY low 3. the channel (FRONT, SUB, REAR, CENT) fine tuning to adjust the volume of its+ /-5dB adjust the volume from 01 ~ 80dB4. panel without any keys are remote control 5. just machines for the standby mode, the boot volume to 50dB, and the fine-tuning for 0dB, 6. by remote REST button, the system for boot-up status, 7. PT2258 total volume attenuation 80DB, by remote control every time attenuation 1dB,
Platform: |
Size: 821248 |
Author: 吴智斌 |
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Description: 多媒体5.1声道遥控功放全套方案(原理图+制作元件参数全套)各功能描述:
1. 当A为低电平时,AC-3灯点亮,即是AC-3的输入方式 当A为高电平时,STEREO灯点亮,即是STEREO的输入方式
2. 当STANDBY灯点亮时，为待机状态；此LED闪动时为MUTE状态,PT2258为静音状态,同时STANDBY为低电平
3. 各声道（FRONT，SUB，REAR，CENT）其微调音量调节+/-5dB；音量调节从01~80dB
4. 面板无任何按键,均为遥控器控制
5. 刚开机时为待机状态，开机时音量为50dB状态,各微调为0dB,
6. 按遥控器的REST键后,系统为开机时状态，
7. PT2258音量衰减共80DB,按遥控器每按一次衰减1dB,
-Multimedia 5.1-channel amplifier remote control package (schematic diagram produced a full set of component parameters) of the function description: 1. When A low when, AC-3 lights lit, that is, AC-3 input mode when the A when is high, STEREO lights lit, that is, STEREO input 2. When the STANDBY lamp lights when the standby state this LED flashing when the MUTE state, PT2258 for the mute state, while low STANDBY 3. the channel (FRONT, SUB, REAR, CENT) its fine-tuning to adjust the volume /-5dB adjust the volume from 01 ~ 80dB4. panel without any keys are remote control 5. just machines for the standby mode, boot volume to 50dB, and the fine-tuning for 0dB, 6. according to the REST button remote control, the system for boot-up status, 7. PT2258 total volume attenuation 80DB, by remote control every time attenuation 1dB,
Platform: |
Size: 822272 |
Author: 班小栓 |
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Description: This book is intended to be an exposition of the modeling and control of
electric machines, specifically, the direct current (DC) machine and the
alternating current (AC) machines consisting of the induction motor, the
permanent magnet (PM) synchronous motor, and the brushless DC motor.
The particular emphasis here is on techniques used for high-performance
applications, that is, applications that require both rapid and precise control
of position, speed, and/or torque. Traditionally, DC motors were reserved
for high-performance applications (positioning systems, rolling mills,
traction drives, etc.) because of their relative ease of control compared to
AC machines. However, with the advances in control methods, computing
capability, and power electronics, AC motors continue to replace DC motors
in high-performance applications. The intent here is to carefully derive
the mathematical models of the AC machines and show how these mathematical
models are used to design control algorithms
Platform: |
Size: 24651776 |
Author: kumar |
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Description: AC DC Drives :Modeling and Simulation Drives All machines
Platform: |
Size: 5137408 |
Author: RAFIK |
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Description: AC Machines
Controlled as
DC Machines
(Brushless DC
Machines/Electronics)
Platform: |
Size: 157696 |
Author: gada.s |
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Description: DC AC Electrical machines manual
Platform: |
Size: 165888 |
Author: vasan |
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Description: Sensorless Control of AC machines for integrated starter generator application
Platform: |
Size: 3270656 |
Author: iswell |
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Description: 交流电机建模，该论文对交流电机进行了简化建模，并对交流电机Park/clark变换原理进行详细说明-AC Motor modelling, the modelling theory of AC motor and also the principle of Park/Clark Transformation
Platform: |
Size: 2071552 |
Author: liu ming |
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Description: Improvement of EMC management for matrix converter fed AC machines
Platform: |
Size: 10240 |
Author: benkhada |
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Description: AC supply for machines using simulink tools
Platform: |
Size: 11264 |
Author: ALI ALMARHOON |
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Description: From the principles of electrical engineering it is known that the 3-phase
quantities of the 3-phase AC machines can be summarized to complex
vectors. These vectors can be represented in Cartesian coordinate systems,
which are particularly chosen to suitable render the physical relations of
the machines. These are the field-orientated coordinate system for the 3-
phase AC drive technology or the grid voltage orientated coordinate
system for generator systems. The orientation on a certain vector for
modelling and design of the feedback control loops is generally called
vector orientation.
Platform: |
Size: 13651968 |
Author: cx |
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Description: 交流电机FOC控制模型的M文件，可以分析steady state和transient state
-Field Orientation of AC Machines
Platform: |
Size: 1024 |
Author: peter |
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Description: On the Causes of Circulating Currents in PWM
Drives With Open-End Winding AC Machines
Phase-Shifting-Transformer-Fed Multimodular
Matrix Converter Operated by a
New Modulation Strategy
An All-DC Offshore Wind Farm With
Series-Connected Turbines: An Alternative to the
Classical Parallel AC Model?
Reactive Power Control of Permanent-Magnet
Synchronous Wind Generator With Matrix Converter
Platform: |
Size: 7259136 |
Author: sina |
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Description: Flux switching machines using
segmental rotors
Platform: |
Size: 15504384 |
Author: vulkan2
|
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