Design of Brushless DC Motor Control System Based on 11:22:37 on Source: foreign electronic components Author: Zheng haoxin, Zheng Bin, Li Jianmin
1 Introduction
In public cycles, the brushless DC motor has the advantages of simple AC motor, reliable operation, convenient maintenance, and high operation efficiency of the DC motor. It is not limited by Mechanical
Device context DC:
1 (wm_paint) drawing in the specified area
Paintstruct pS;
HDC = beginpaint (hwnd, PS );
Endpaint (hwnd, PS );
2. drawing in the entire user area
HDC = getdc (hwnd); releasedc (hwnd, HDC );
3. drawing in the entire form Area
HDC = getwindowdc (hwnd); releasedc (hwnd, HDC );
4. DC drawn in the entire display area
HDC = createdc (maid, maid, maid)
To draw on the screen, call
H
The pulse problem directly affects the EMI and power supply noise of the product, and it is necessary to add a spike pulse absorption circuit at some point.As can be seen, the peak pulse absorption circuit is an RC absorption circuit. As for where the DC and the RC absorption circuit, there is a rule, that is, when the switch tube on/off, with the inductor to form a circuit.How do I select RC parameters?The 1:RC 3dB cutoff frequency is set to 5~8 time
electricity for life (i.e. mains, 220V or 380V) is alternating current. One, the difference between AC and DC power: the size of alternating current (voltage) and the direction of the change over time, in China is 1 seconds 50 cycles (50Hz).alternating current does not divide the positive and negative pole.DC Powerthe size and direction are fixed. (such as: Battery isDC power supply). Second, why use AC: Because AC power is availableTransformerconveni
After using the Active Directory of Virtual Machine installation for Windows Server 2003 sp 1, we found that "RPC server unavailable" appeared when the system was used to install additional DC ", in this way, "BDC" cannot be installed, and the solution is finally found:1. Use Net start RPCSS to start the service // usually start 2. Access the master DC Through the UNC path and enter the Administrator and pa
1. Gets the handle to the current cursor's window and obtains the ID list of the window control:
HWND hwnd =:: GetFocus ();int IID =:: GetDlgCtrlID (HWND);if (IID = = idc_edit_cfgdata)//Idc_edit_cfgdata is the ID of a Eidt control
{
......
}
2. When you have more than one dialog box, get the handle of the main dialog box in the Child dialog box:
HWND hwnd = AfxGetApp ()->getmainwnd ()->getsafehwnd ();
:: SendMessage (HWND,WM_CONFIGURE_EVENT,A,B); WM_CONFIGURE_EVENT,A,B a message for the
Why do we install additional DCS? What do I need to be aware of installing additional DCS? How do I install an additional DC? What if I want to uninstall an extra DC? What do I need to notice when uninstalling? Please follow me to answer all these questions.One, the benefits of installing additional DCS:1, providing fault-tolerant functionality. When a DC fails,
Recently, air hunters are preparing to buy a DC.Every day, I went around to find relevant information, read technical indicators and articles about N types of DC, and kept asking questions on QQ, MSN, and Gtalk, I hate to add all the DC functions on the market to him.Of course there is no such DC on the one to be purchased, and even the highest-end DSLR cannot pr
frequency of the scan to match the true operating frequency of the chip, while using the new Transition ATPG model To produce the test pattern. Below we introduce The similarities and differences between DC Scan and AC scan Today's high-speed chips for industrial production require DC scan testing and AC scan testing, so DFT engineers also have to plug in two test circuits, producing tw
Yesterday the company's San Controller was hung up, directly resulting in dozens of virtual machine machines. Manager toss to midnight, finally replaced the new controller, re-mount Lun, and then seemingly return to normal, then pleasantly home.This morning the beans to the company, the first problem is that Exchange Outlook users cannot log in! After a closer look, we found that 4, 5 DC NTP points to a DC
characters long and can be in Chinese;Ou=organization Unit is an organizational unit, can have a maximum of four levels, a maximum of 32 characters per level, can be Chinese;O=organization is the name of the organization and can be 3-64 characters in lengthC=country is a country name, optional, 2 characters in lengthThe LDAP directory stores record items in a series of "property pairs", each of which includes attribute types and attribute values (which is fundamentally different from the relati
In linux, the dc calculator dc adopts the inverse polish expression, and the calculation process is manual maintenance of the stack. The reverse Polish style looks awkward, but it runs very efficiently. If you don't talk about things in a mess, you can directly enter the script positive question and negative sign in dc and use _ to represent rather than-, because
http://ssailyang.iteye.com/blog/413518
Turn from: http://stevenit.bokee.com/viewdiary.30578007.htmlAlthough many people will use dsadd and other commands to add users, but dsadd instructions inside does not involve the meaning of Dc,cn,ou, many people do not understand, here is Microsoft's technical support staff's reply, hope to help.CN, OU, DC are the distinguished names in the end strings of the LDAP co
Troubleshooting of DC brushless motor control problems
(1) What is the role of the hall line of the brushless motor in its rotation?
(2) Can the motor work normally without the hall line of the "brushless motor? If it works properly, what will happen?
(3) how to identify and determine whether a brushless motor has a phase of 60 and 120?
(4) Factors Affecting the speed of the brushless motor?
(5) What is the direct connection between "Sp
From today on, I will take a look at the source code of the DC. Web. httpcompress compression module. I also hope you can discuss it together ~
1. First, let's talk about the entire process. We all know that the following things will happen after you click the URL on the page in the browser:
The browser sends an HTTP request to the server. The server finds the page and returns it to the browser. After the browser downloads the file, it starts t
Use LVM to build bare devices and build libraries on red Flag DC server (Linux)
Some of the things you need to be aware of when creating LVM, creating raw device and building repositories.
In addition, using LVM allows you to dynamically add the size of the raw device to dynamically expand the size of the Oracle tablespace.
1 first create a primary partition: Fdisk/dev/hdb Create a partition/DEV/HDB52 Creating PV:PVCREATE/DEV/HDB53 Creating Vg:vgcrea
If you define a bitmap class, it contains the bitmap header, the bitmap information header, the palette, and the bitmap data. Then you read the bitmap file into your class in the format of the bitmap, and now you know all the information about the bitmap. The main information is contained in the bitmap information header, the data is in the bitmap data buffer inside. The question now is how to draw a bitmap out of windows, and now how to paint bitmaps from the data cache.In general, we are drawi
DC is the device context, which is a data structure inside GDI. a dc will work with a specific display device (
Such as printers and screens). If we can get the handle of the DC, We can display it here.
Write and draw pictures on the device.
In form or picturebox, there is an HDC attribute, which refers to this thing, but how can there be another
What about m
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