Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt

... Craig DC Motor / Tachometer Closed-Loop Speed Control System 28 Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 29 9. Testing of the Closed-Loop System ...   ωω i B J K J K L R L i L V t b in L N M O Q P = − − − L N M M O Q P P L N M O Q P + L N M O Q P 0 1 Mechatronics Kevin Craig DC Motor / Tac...

Ngày tải lên: 25/01/2014, 13:20

... drawback to SWDC motors is that they do not have precise speed control like PMDC and SHWDC motors have. FIGURE 4: SERIES-WOUND DC MOTORS Armature Brush Permanent Magnet Poles DC Voltage Supply Armature Brush Shunt Field DC Voltage Supply Armature Brush Series Field DC Voltage Supply  ... and series-wound motors. As shown in Figure 5, CWDC motors employ both a series and a shunt...

Ngày tải lên: 22/12/2013, 14:15

Ngày tải lên: 10/12/2013, 02:15

... Configuration -> Administrative Templates -> Control Panel. 2. Chọn “Show only specified Control Panel Applets” hay “Hides specified Control Panel Applets”. ở cửa sổ bên phải. Right Click ... bạn chọn “Show only specified Control Panel Applets” ở bước 2, hay giấu, nếu bạn chọn “Hides specified Control Panel Applets” ở bước 2, như sau: o “sysdm.cpl” cho System Properties...

Ngày tải lên: 18/01/2014, 07:20

... MIICyzCCAnWgAwIBAgIBATANBgkqhkiG9w0BAQQFADBtMRgwFgYDVQQKEw9TLiBK b3NlZnNzb24gQ0ExNzA1BgNVBAsTLkNsYXNzIDEgUHVibGljIFByaW1hcnkgQ2Vy dGlmaWNhdGlvbiBBdXRob3JpdHkxGDAWBgNVBAMTD1MuIEpvc2Vmc3NvbiBDQTAe Fw0wMDA4MjUxMDQ3NTRaFw0wMTA4MjUxMDQ3NTRaMDUxDzANBgNVBAMTBlVzZXIg MDEiMCAGCSqGSIb3DQEJARYTdXNlcjBAam9zZWZzc29uLm9yZzCCASIwDQYJKoZI hvcNAQEBBQADggEPADCCAQoCggEBAOt7vExdSCyArDkurB6fiFwnIuc9CrRWyt6Q BSyq...

Ngày tải lên: 14/02/2014, 08:20

... CASE STUDY Washington DC Law Firm Enables Wireless Coverage CHALLENGE Kirkpatrick & Lockhart Preston Gates Ellis LLP

Ngày tải lên: 21/12/2013, 07:17

... time. initial height =1 m surface area = 2 m 2 Ki = 1 liter/min/degree Ko = 2 liter/min/m valve angle = 20 degrees T = 30 sec. page 45 5.1.3 Second Order System Example • Consider the second order example ... 48 5.2 DISCRETE CONTROLLERS • The system models we developed before allow us to predict how a system will behave. A sepa- rate, and important topic is computer control. • With no...

Ngày tải lên: 19/01/2014, 20:20

... 0x330, /* Base address for card */ r, c_now, /* Set up variables for equations */ e_now, e_last=0, /* error values */ m_now, m_last=0; /* control values */ double T = 0.1; /* set the system time ... process */ sleep(T); /* an operating system specific timing function */ c_now = inp(base+0 )/1 6 + inp(base+1)*16; /* calculate the current value */...

Ngày tải lên: 19/01/2014, 20:20

... common systems assumed - first and second order. • First order systems are very simple, as is shown below. 7.1.6 A Motor Control System Example • Condsider the example of a DC servo motor controlled ... and changing spring constant, etc. 3.2 CONTROL SYSTEM CHARACTERISTICS • Control systems are present in most systems we see. Example - elevator height. • Some systems are natura...

Ngày tải lên: 25/01/2014, 04:20

... 19 AN887 CONTROL TECHNIQUES Various speed control techniques implemented by modern-age VFD are mainly classified in the following three categories: • Scalar Control (V/f Control) • Vector Control ... 20% in the operating speed of the motor from its rated speed will result in an almost 50% reduction in the input power to the motor. This is not possible in a system where th...

Ngày tải lên: 25/01/2014, 13:20