PWM for DC motor driver circuit
... Pulse-width modulation uses square waves generated by microcontrollers to control voltage across a circuit. Square waves alternate between a high-logic (binary 1) level and a low logic (binary 0) level, where high logic has a positive voltage and low logic has zero voltage. Figure 2 is an example. N ...
... Pulse-width modulation uses square waves generated by microcontrollers to control voltage across a circuit. Square waves alternate between a high-logic (binary 1) level and a low logic (binary 0) level, where high logic has a positive voltage and low logic has zero voltage. Figure 2 is an example. N ...
Micronote 128
... In the first quadrant of Figure 1 where the anode is biased positively relative to the cathode, is the diode forward-voltage characteristic for the low voltage “Forward Conduction” mode. Transients are also clipped in this direction as shown, but at a low level on the order of a volt or two. Higher ...
... In the first quadrant of Figure 1 where the anode is biased positively relative to the cathode, is the diode forward-voltage characteristic for the low voltage “Forward Conduction” mode. Transients are also clipped in this direction as shown, but at a low level on the order of a volt or two. Higher ...
RFVC1844 数据资料DataSheet下载
... RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. RFMD Green: RoHS compliant per EU Directive 2002/95/EC, halogen free per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and ...
... RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice. RFMD Green: RoHS compliant per EU Directive 2002/95/EC, halogen free per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric materials and ...
International Electrical Engineering Journal (IEEJ) Vol. 6 (2015) No.2, pp. 1749-1755
... less pollutant drives. Loads, such as, diode bridge rectifier or a thyristor bridge feeding a highly inductive load, presenting themselves as current source at point of common coupling (PCC), can be effectively compensated by connecting an APF in shunt with the load [4-6]. On the other hand, there a ...
... less pollutant drives. Loads, such as, diode bridge rectifier or a thyristor bridge feeding a highly inductive load, presenting themselves as current source at point of common coupling (PCC), can be effectively compensated by connecting an APF in shunt with the load [4-6]. On the other hand, there a ...
Resistors for Power Supply Applications
... uneven sharing and potential voltage overload on the capacitor with the higher leakage resistance. In other words, if Rla (Va) < Rlb (Vb) then the result will be Vb > Va and possible failure of Cb. The solution is to use balancing resistors as shown in Figure 5. These are high value resistors rated ...
... uneven sharing and potential voltage overload on the capacitor with the higher leakage resistance. In other words, if Rla (Va) < Rlb (Vb) then the result will be Vb > Va and possible failure of Cb. The solution is to use balancing resistors as shown in Figure 5. These are high value resistors rated ...
Experiment No. 1 Study of Separately
... Although separate excitation requires a separate dc power source, it is useful in cases where a generator must respond quickly and precisely to an external control source, or when the output voltage must be varied over a wide range. With no electrical load connected to the generator, no current flow ...
... Although separate excitation requires a separate dc power source, it is useful in cases where a generator must respond quickly and precisely to an external control source, or when the output voltage must be varied over a wide range. With no electrical load connected to the generator, no current flow ...
There are various ways to measure or detect the amplitude (as
... input is +Ve with respect to the capacitor voltage, hence ‘topping up’ the capacitor voltage to the peak level, but blocking any current from flowing back out through the diode when the input voltage is below the capacitor voltage. Unfortunately, all real diodes are non-linear. The current they pass ...
... input is +Ve with respect to the capacitor voltage, hence ‘topping up’ the capacitor voltage to the peak level, but blocking any current from flowing back out through the diode when the input voltage is below the capacitor voltage. Unfortunately, all real diodes are non-linear. The current they pass ...
Tender specifications
... 7.- Feeding from the wind generator. 8.- Feeding from the battery. Some practical exercises possibilities with the Optional SCADA System: 9.- Monitoring and Data Acquisition wind turbine curves. 10.- Measurement of energy generation in function of the wind speed. 11.- Remote control of the wind turb ...
... 7.- Feeding from the wind generator. 8.- Feeding from the battery. Some practical exercises possibilities with the Optional SCADA System: 9.- Monitoring and Data Acquisition wind turbine curves. 10.- Measurement of energy generation in function of the wind speed. 11.- Remote control of the wind turb ...
Abstract - Induction motor is used in majority of the
... Current transformers are used so that ammeters and the current coils of other instruments and relays need not be connected directly to high voltage lines. In other words, these instruments and relays are insulated from high voltages. CT’s also step down the current in a known ratio. The use of CT me ...
... Current transformers are used so that ammeters and the current coils of other instruments and relays need not be connected directly to high voltage lines. In other words, these instruments and relays are insulated from high voltages. CT’s also step down the current in a known ratio. The use of CT me ...
A transformer is a device that transfers electrical energy from
... relationship between the primary and secondary windings. Transformer types are also designated by the function the transformer serves in a circuit. A .............................................................. are generally used in electrical power distribution and transmission systems. This clas ...
... relationship between the primary and secondary windings. Transformer types are also designated by the function the transformer serves in a circuit. A .............................................................. are generally used in electrical power distribution and transmission systems. This clas ...
S4624 npmxxx Reactive Power
... can be extracted from it. In a circuit where there is both inductive and capacitive impedances the combination of a lagging and leading current waveforms will tend to cancel each other out. Thus the reactive power in an inductive circuit, which is that most commonly found in industry and commerce, c ...
... can be extracted from it. In a circuit where there is both inductive and capacitive impedances the combination of a lagging and leading current waveforms will tend to cancel each other out. Thus the reactive power in an inductive circuit, which is that most commonly found in industry and commerce, c ...
FMB2222A FFB2222A MMPQ2222A NPN Multi-Chip General Purpose Amplifier
... NPN Multi-Chip General Purpose Amplifier This device is for use as a medium power amplifier and switch requiring collector currents up to 500 mA. Sourced from Process 19. ...
... NPN Multi-Chip General Purpose Amplifier This device is for use as a medium power amplifier and switch requiring collector currents up to 500 mA. Sourced from Process 19. ...
Rectifier
A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification. Physically, rectifiers take a number of forms, including vacuum tube diodes, mercury-arc valves, copper and selenium oxide rectifiers, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motors have been used. Early radio receivers, called crystal radios, used a ""cat's whisker"" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or ""crystal detector"".Rectifiers have many uses, but are often found serving as components of DC power supplies and high-voltage direct current power transmission systems. Rectification may serve in roles other than to generate direct current for use as a source of power. As noted, detectors of radio signals serve as rectifiers. In gas heating systems flame rectification is used to detect presence of a flame.Because of the alternating nature of the input AC sine wave, the process of rectification alone produces a DC current that, though unidirectional, consists of pulses of current. Many applications of rectifiers, such as power supplies for radio, television and computer equipment, require a steady constant DC current (as would be produced by a battery). In these applications the output of the rectifier is smoothed by an electronic filter (usually a capacitor) to produce a steady current.More complex circuitry that performs the opposite function, converting DC to AC, is called an inverter.