50 punkti
Autor soovib selle materjali allalaadimise eest saada 50 punkti.
~ 6 lehte
Lehekülgede arv dokumendis
2017-12-05
Kuupäev, millal dokument üles laeti
2 laadimist
Kokku alla laetud
0 arvamust
Teiste kasutajate poolt lisatud kommentaarid
hehar
Õppematerjali autor
Therefore manufacturer's data sheet specifies the maximum forward current, that diode can withstand. This average current IF is the rate a diode can handle up to the forward direction when used as a rectifier. Another entry of interest in the data sheet is the forward voltade drop UF(max) when the maximum forward current occurs. An usual diode has this value 0.7-2.0V. Diode conducts easily when forward biased. Reverse biasing. The reverse current is a leakage current at the source rated voltage. Typically, silicon diodes have 1-10 microA and germanium 200-700 microA of leakage current. This value includes thermally produced current and surface leakage current. Only these currents take place, when a diode is reverse biased. At breakdown, the diode goes into avalanche where a number of carriers appear suddenly in the depletion layer. With a rectifier diode, breakdown is usually destructive. 4)Typical values: Uknee- approximatly 0.7V; UF 0.7-2.0V; leakage (IR) 1-10 microA/200-
Tallinn University of Technology Department of Electricl Power Engineering and Mechatronics Report on Exercises 3 on Power Electronics Three-Phase Rectifiers Tallinn 2017 Given parameters: Output voltage, Ud = 10 V Input frequency, fin = 50 Hz Load resistance, Rload = 70 kOhm Calculations: M3 rectifier: u1 10 I d= = =0.143 mA R L 70000 2π Ud 2 π∗10 U ¿max = = =12.09 V 3 √3 3 √3 U ¿ max 12.09 U ¿rms = = =8.55V √2 √2 B6 rectifier: πUd π∗10 U ¿max = = =6.05 V
Coolers 148 Fans 149 LEDs 151 7 Motors 161 Stepper Motors 161 DC Motors 180 Brushless DC Motors 184 Tradeoffs between Motors 198 Motor Torque 201 vi Contents 8 EMI 203 Ground Loops 203 ESD 208 9 High-Precision Applications 213 Input Offset Voltage 215 Input Resistance 216 Frequency Characteristics 217 Temperature Effects in Resistors 218 Voltage References 219 Temperature Effects in General 221 Noise and Grounding 222 Supply-Based References 227 10 Standard Interfaces 229 IEEE 1451.2 229 4-20 ma Current Loop 231 Appendix A: Opamp Basics 233 Four Opamp Configurations 233
output relays or destruction of the output transistors. As a countermeasure for such problems, external safety measures must be provided to ensure safety in the system. • When the 24-VDC output (service power supply to the PC) is overloaded or short-circuited, the voltage may drop and result in the outputs being turned OFF. As a countermeasure for such problems, external safety measures must be provided to ensure safety in the system. ! WARNING When transferring programs to other nodes, or when making changes to I/O memory, confirm the safety of the destination node before transfer. Not doing so may result in injury.
Check and if necessary adjust the idle speed and Lubricate all hinges, door locks, check straps and the mixture settings (Section 10) bonnet release mechanism (Section 31) Clean the distributor cap, coil tower and HT leads and Check the operation of all door, tailgate, bonnet release check for tracking (Section 11) and window regulator components (Section 31) On contact breaker point distributors lubricate the Carry out a road test (Section 32) distributor shaft and cam (Section 12) On contact breaker point distributors check and if necessary adjust the points gap (dwell angle), then Every 24 000 miles (40 000 km) or check the ignition timing (Sections 13 and 14) On RS Turbo models renew the spark plugs (Section 15)
A... AA Auto Answer AAA Authentication, Authorization and Accounting AAB All-to-All Broadcast AAC Advanced Audio Coding AACS Advanced Access Control System AAL Asynchronous Transfer Mode Adaption Layer AAM Automatic Acoustic Management AAP Applications Access Point [DEC] AARP AppleTalk Address Resolution Protocol AAS All-to-All Scatter AASP ASCII Asynchronous Support Package AAT Average Access Time AATP Authorized Academic Training Program [Microsoft] .ABA Address Book Archive (file name extension) [Palm] ABAP Advanced Business Application Programming [SAP] ABC * Atanasoff-Berry Computer (First digital calculating machine that used vacuum tubes) ABEND Abnormal End ABI Application Binary Interface ABIOS Advanced BIOS ABIST Automatic Built-In Self-Test [IBM] ABLE Adaptive Battery Life Extender + Agent Building and Learning Environment [IBM] ABM Asynchronous Balanced Mode ABR Available Bit Rate ABRD
oData transparency: In bit and byte oriented protocols, there is a problem if a control character (for ETX (End of Text) ·Same as ETB, only no more blocks will follow. ITB (End of > Differences with HDLC length of protocol field (1B or 2B) byte-oriented protocols) or the start-of-frame flag (for bit-oriented protocols) appears in the actual data. Intermediate Transmission Block) ·Same as ETB, except that the receiving statio Differs from HDLC because of multiaccess MAC that provides · Maximum payload length (default: 1500) This was not likely to happen in ASCII text, but is very likely with binary data. This is known as a data will not acknowledge after the error checking. EOT (End of Transmission) framing/error detection: · Type of CRC (2B or 4B) transparency problem an can be rectified with byte stuffing (for byte-orien
Chapter 4 Mechanical Properties of Wood David W. Green, Jerrold E. Winandy, and David E. Kretschmann Contents he mechanical properties presented in this chapter were obtained from tests of small pieces of wood Orthotropic Nature of Wood 4–1 termed “clear” and “straight grained” because they Elastic Properties 4–2 did not contain characteristics such as knots, cross grain, Modulus of Elasticity 4–2 checks, and splits. These test pieces did have anatomical Poisson’s Ratio 4–2 characteristics such as growth rings that occurred in consis-
annaabi.ee 
Sisene Facebook'ga
Sisene Google'ga
Sisene LinkedIn'ga
Kõik kommentaarid