K8AK-PA 3-phase Asymmetry, Phase Sequence, Phase Loss Relay
... operation. Use the asymmetry detection function. Normally, three-phase motors will continue to rotate even if one phase is open. The three-phase voltage will be induced at the motor terminals. The diagram shows voltage induction at the motor terminals when phase R is lost with a load applied to a th ...
... operation. Use the asymmetry detection function. Normally, three-phase motors will continue to rotate even if one phase is open. The three-phase voltage will be induced at the motor terminals. The diagram shows voltage induction at the motor terminals when phase R is lost with a load applied to a th ...
AP7365 600mA, LOW QUIESCENT CURRENT, FAST TRANSIENT LOW DROPOUT LINEAR REGULATOR
... keep low undershoot and overshoot. Output capacitor must be placed as close as possible to OUT and GND pins. ...
... keep low undershoot and overshoot. Output capacitor must be placed as close as possible to OUT and GND pins. ...
Lab E4: Capacitors and the RC circuit
... has +Qo , the other has -Qo). The larger the capacitance, the larger the charge carried. If the two sides of this charged capacitor are then connected by a wire, there will be a large, brief current through the wire as the capacitor discharges. If we use a large resistance R, instead of a wire, to c ...
... has +Qo , the other has -Qo). The larger the capacitance, the larger the charge carried. If the two sides of this charged capacitor are then connected by a wire, there will be a large, brief current through the wire as the capacitor discharges. If we use a large resistance R, instead of a wire, to c ...
Review on Fault Diagnosis in Three-Phase
... increase with large currents [16]. It has been estimated that the winding temperature also increases with load. Therefore to operate the motor at a specific load, insulation system should be selected accordingly, to meet a rating that is well above the operating temperature. 2) Electrical stresses: ...
... increase with large currents [16]. It has been estimated that the winding temperature also increases with load. Therefore to operate the motor at a specific load, insulation system should be selected accordingly, to meet a rating that is well above the operating temperature. 2) Electrical stresses: ...
General-Purpose Inverters and Servo Systems
... raised processing speed, and control data processing speed has more than doubled. In servo systems, operations formerly processed with software have been processed with hardware through utilization of application specific integrated circuits (ASICs), for example, and the control period has been made ...
... raised processing speed, and control data processing speed has more than doubled. In servo systems, operations formerly processed with software have been processed with hardware through utilization of application specific integrated circuits (ASICs), for example, and the control period has been made ...
evaluation of simple fault location on a mv feeder with dg
... [1]-[3]. Lethonen et. al. [4] presents a method for estimating the distance to the fault by comparing the measured and the calculated fault current. In addition, information from fault locators in the branching points and knowledge of fault frequencies of different line sections are utilized. There ...
... [1]-[3]. Lethonen et. al. [4] presents a method for estimating the distance to the fault by comparing the measured and the calculated fault current. In addition, information from fault locators in the branching points and knowledge of fault frequencies of different line sections are utilized. There ...
Low voltage versatile telephone transmission circuit with dialler
... extremely-low voltage conditions ...
... extremely-low voltage conditions ...
Energy efficiency and harmonics in electric power systems
... As for the technology we are in the middle of a historical change towards energy optimization and sustainable energy production. Fossil fuels are becoming less politically accepted and many nations are starting to replace it with green energy. This evolution leads to large changes in production site ...
... As for the technology we are in the middle of a historical change towards energy optimization and sustainable energy production. Fossil fuels are becoming less politically accepted and many nations are starting to replace it with green energy. This evolution leads to large changes in production site ...
FL ballasts Electronic dimming PCA T5 EXCEL one4all lp Y, 3x14
... Deactivation: If the corridorFUNCTION is wrongly activated in a switchDIM system (for example a switch is used instead of pushbutton), there is the option of installing a pushbutton and deactivating the corridorFUNCTION mode by five short pushes of the button within three seconds. switchDIM and corr ...
... Deactivation: If the corridorFUNCTION is wrongly activated in a switchDIM system (for example a switch is used instead of pushbutton), there is the option of installing a pushbutton and deactivating the corridorFUNCTION mode by five short pushes of the button within three seconds. switchDIM and corr ...
Control and Power Supply for Resistance Spot Welding (RSW)
... In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high speed, simple mechanism and applicability for automation. RSW has become the predominant means of auto body assembly, resulting in two to six thousands spot welds performed on each manufactured car. In th ...
... In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high speed, simple mechanism and applicability for automation. RSW has become the predominant means of auto body assembly, resulting in two to six thousands spot welds performed on each manufactured car. In th ...
MAX6921/MAX6931 20-Output, 76V, Serial-Interfaced VFD Tube Drivers General Description
... and multiplexed displays. The output ports feature high current-sourcing capability to drive current into grids and anodes of static or multiplex VFDs. The ports also have active current sinking for fast discharge of capacitive display electrodes in multiplexing applications. The 4-wire serial inter ...
... and multiplexed displays. The output ports feature high current-sourcing capability to drive current into grids and anodes of static or multiplex VFDs. The ports also have active current sinking for fast discharge of capacitive display electrodes in multiplexing applications. The 4-wire serial inter ...
Singh2013-StressAnalysis-MEMS.pdf
... dielectric material is used on top of the signal line. The characteristics of the switch are mainly governed by the design of the membrane. To lower the pull-down voltage, meanders are included on the sides of the membrane, which helps to lower the spring constant of the membrane. The membrane is th ...
... dielectric material is used on top of the signal line. The characteristics of the switch are mainly governed by the design of the membrane. To lower the pull-down voltage, meanders are included on the sides of the membrane, which helps to lower the spring constant of the membrane. The membrane is th ...
ENERGY SAVINGS AND OPERATION
... 2. Description of rotary kiln Cement kilns are long, steel plate cylinders, lined with bricks, which slowly rotate at between 30 and 250 revolutions per hour, with a diameter of 3 – 5 meters and a total length reaching up to 200 meters, built with a small slope (1–4°) to assist material flow inside ...
... 2. Description of rotary kiln Cement kilns are long, steel plate cylinders, lined with bricks, which slowly rotate at between 30 and 250 revolutions per hour, with a diameter of 3 – 5 meters and a total length reaching up to 200 meters, built with a small slope (1–4°) to assist material flow inside ...
Supply Regulation Techniques for Phase-Locked
... The power supply for the VCO is handled by a separate regulator pair in order to ensure that any supply variations that might be introduced by the divider, which is a digital block does not get coupled to the VCO. The prototype schematics were designed in a standard (non-triple well) 90nm CMOS proce ...
... The power supply for the VCO is handled by a separate regulator pair in order to ensure that any supply variations that might be introduced by the divider, which is a digital block does not get coupled to the VCO. The prototype schematics were designed in a standard (non-triple well) 90nm CMOS proce ...
TECHniques - Markertek
... You would think it would be pretty simple. SDI comes into a device and it goes out the back. Well, let’s consider that “out” for a moment. Just as we are concerned with equalizing the input SDI signal coming off the coaxial cable, the same must be true when feeding a coaxial cable from the output of ...
... You would think it would be pretty simple. SDI comes into a device and it goes out the back. Well, let’s consider that “out” for a moment. Just as we are concerned with equalizing the input SDI signal coming off the coaxial cable, the same must be true when feeding a coaxial cable from the output of ...
element3
... 13] The Distance Measuring Equipment (DME) ground station has a built-in delay between reception of an interrogation and transmission of the reply to allow : a} Someone to answer the call. b} The VOR to make a mechanical hook-up. c} Clear other traffic for a reply. d} Operation at close range.@@ ...
... 13] The Distance Measuring Equipment (DME) ground station has a built-in delay between reception of an interrogation and transmission of the reply to allow : a} Someone to answer the call. b} The VOR to make a mechanical hook-up. c} Clear other traffic for a reply. d} Operation at close range.@@ ...
Additional safety prescriptions for trolleybuses
... distances for all electrical and electronic equipment. Annexes A and D. Paragraph 2., title Current is new wording for (electrical) power. Paragraph 2.1. New wording for the current collector and parts thereof replaces the old wording with reference to TS50502 Railway applications – Rolling stock El ...
... distances for all electrical and electronic equipment. Annexes A and D. Paragraph 2., title Current is new wording for (electrical) power. Paragraph 2.1. New wording for the current collector and parts thereof replaces the old wording with reference to TS50502 Railway applications – Rolling stock El ...
Servo Motor Kontrolü Servo Motors
... Controlling Servo Motors Servo motors are controlled by a series of pulses and to make it easy to use them, an Arduino library has been created so that you can just instruct the servo to turn to a particular angle. The position of the servo motor is set by the length of a pulse. The servo expects t ...
... Controlling Servo Motors Servo motors are controlled by a series of pulses and to make it easy to use them, an Arduino library has been created so that you can just instruct the servo to turn to a particular angle. The position of the servo motor is set by the length of a pulse. The servo expects t ...
MAX1178/MAX1188 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range General Description
... In track mode, the internal hold capacitor acquires the analog signal (Figure 4). In hold mode, the T/H switches open and the capacitive DAC samples the analog input. During the acquisition, the analog input (AIN) charges capacitor CHOLD. The acquisition ends on the second falling edge of CS. At thi ...
... In track mode, the internal hold capacitor acquires the analog signal (Figure 4). In hold mode, the T/H switches open and the capacitive DAC samples the analog input. During the acquisition, the analog input (AIN) charges capacitor CHOLD. The acquisition ends on the second falling edge of CS. At thi ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.