PRESENTATION ON SUBSTATION DESIGN AND CONSTRUCTION
... Substation Grounding Circumstances for Human Electric Shock Relatively high fault current to ground in relation to the area of the grounding system and its resistance to remote earth. Soil resistivity and distribution of ground currents such that high potential gradients may occur at points at th ...
... Substation Grounding Circumstances for Human Electric Shock Relatively high fault current to ground in relation to the area of the grounding system and its resistance to remote earth. Soil resistivity and distribution of ground currents such that high potential gradients may occur at points at th ...
- Yokogawa
... variable speed drive in combination with a three phase induction motor. Where an Oscilloscope often has a limited channel count and non-isolated input channels, the DL850E can be equipped with 16 or more channels and has a diverse range of input modules, where each channel is individually isolated. ...
... variable speed drive in combination with a three phase induction motor. Where an Oscilloscope often has a limited channel count and non-isolated input channels, the DL850E can be equipped with 16 or more channels and has a diverse range of input modules, where each channel is individually isolated. ...
Design of SVPWM Inverter for Induction Motor Drive Using PID
... industrial purposes. As compared to DC machine, it gives less cost and easy maintenance. However, the speed control of induction motor is more complex, which gives non-linear in nature. Therefore, speed variation can be achieved for this kind of machine by acting on the supply net frequency. There i ...
... industrial purposes. As compared to DC machine, it gives less cost and easy maintenance. However, the speed control of induction motor is more complex, which gives non-linear in nature. Therefore, speed variation can be achieved for this kind of machine by acting on the supply net frequency. There i ...
ERP020-030-040 data sheet revF 26OCT2016
... The ERP020/030/040 LED driver has been designed to operate with a 100 kΩ NTC resistor to provide a knee in the output current regulation between 90°C and 95°C . The graph in Figure 2 shows the reduction in output current as the temperature of the NTC rises above 90°C. For this example, the NTC is a ...
... The ERP020/030/040 LED driver has been designed to operate with a 100 kΩ NTC resistor to provide a knee in the output current regulation between 90°C and 95°C . The graph in Figure 2 shows the reduction in output current as the temperature of the NTC rises above 90°C. For this example, the NTC is a ...
Optical Communications Laboratory
... Look at the falling edge on the 50ns time scale with the function generator waveform superimposed, and attach a 47ρF capacitor across R2. Observe what happens. This is known as a speed-up capacitor, and decreases the storage time by storing charge to neutralize the base charge "just after turn-off". ...
... Look at the falling edge on the 50ns time scale with the function generator waveform superimposed, and attach a 47ρF capacitor across R2. Observe what happens. This is known as a speed-up capacitor, and decreases the storage time by storing charge to neutralize the base charge "just after turn-off". ...
AG4201218222
... restrictions and social problems too. Thus effective utilization of the existing transmission systems with the help of new technologies so called Flexible AC Transmission Systems (FACTS) devices[3]. Here we are using Unified Power Flow Controller (UPFC) for ATC enhancement in between the areas, Sinc ...
... restrictions and social problems too. Thus effective utilization of the existing transmission systems with the help of new technologies so called Flexible AC Transmission Systems (FACTS) devices[3]. Here we are using Unified Power Flow Controller (UPFC) for ATC enhancement in between the areas, Sinc ...
Silicon Controlled Rectifier (SCR) notes
... Other ratings include gate/cathode currents and voltages, maximum peak surge current, maximum temperatures and fusing requirements. Anyone involved in SCR circuit design would of course have to be concerned with all specifications. The SCR is most often used in electrical control circuits and is pa ...
... Other ratings include gate/cathode currents and voltages, maximum peak surge current, maximum temperatures and fusing requirements. Anyone involved in SCR circuit design would of course have to be concerned with all specifications. The SCR is most often used in electrical control circuits and is pa ...
ACS752SCA-050 - Allegro Microsystems
... been saturated, usually when the device has been subjected to a full-scale or high-current overload condition. The magnetic offset is largely dependent on the material used as a flux concentrator. The larger magnetic offsets are observed at the lower operating temperatures. Accuracy (ETOT). The accu ...
... been saturated, usually when the device has been subjected to a full-scale or high-current overload condition. The magnetic offset is largely dependent on the material used as a flux concentrator. The larger magnetic offsets are observed at the lower operating temperatures. Accuracy (ETOT). The accu ...
class ab square root domain filter
... transistor to realize the expander f() which result in class A filter. Input signal currents can not be larger than input bias currents, It is well known that the power dissipation and the capacitor area is proportion to the dynamic range of class A filter. A general approach for the implementation ...
... transistor to realize the expander f() which result in class A filter. Input signal currents can not be larger than input bias currents, It is well known that the power dissipation and the capacitor area is proportion to the dynamic range of class A filter. A general approach for the implementation ...
Study and Analysis of Universal Gates Using Stacking Low
... Lot of tools available to automate the design process. ...
... Lot of tools available to automate the design process. ...
frequency and phase modulation
... but synchronization is needed in case complex as variation of modulating of SSBSC AM carrier. signal has to be converted and detected from corresponding variation in frequencies.(i.e. voltage to frequency and frequency to voltage conversion has to be done). AM is more susceptible to noise FM is less ...
... but synchronization is needed in case complex as variation of modulating of SSBSC AM carrier. signal has to be converted and detected from corresponding variation in frequencies.(i.e. voltage to frequency and frequency to voltage conversion has to be done). AM is more susceptible to noise FM is less ...
Understanding Loudspeaker Power Handling Selecting the Proper
... Duration of Test: The loudspeaker is “broken in” for approximately 30 minutes at a low power level prior to the progressive power rating process. The loudspeaker is then subjected to successively higher power levels with time allowed for the loudspeaker to stabilize at each increment with 30 minutes ...
... Duration of Test: The loudspeaker is “broken in” for approximately 30 minutes at a low power level prior to the progressive power rating process. The loudspeaker is then subjected to successively higher power levels with time allowed for the loudspeaker to stabilize at each increment with 30 minutes ...
Thyristor power controller TE10A Burst-firing Single
... failure to observe the instructions given in this manual. PERSONNEL The installation, configuration, commissioning and maintenance of the power unit should only be carried out by personnel qualified and trained to work with low voltage electrical equipment in an industrial environment. INDEPENDENT S ...
... failure to observe the instructions given in this manual. PERSONNEL The installation, configuration, commissioning and maintenance of the power unit should only be carried out by personnel qualified and trained to work with low voltage electrical equipment in an industrial environment. INDEPENDENT S ...
AP6502A Description Pin Assignments
... Above the ‘EN Rising Threshold’, the internal regulator is turned on and the quiescent current can be measured above this threshold. The enable (EN) input allows the user to control turning on or off the regulator. To enable the AP6502A, EN must be pulled above the ‘EN Lockout Threshold Voltage’ and ...
... Above the ‘EN Rising Threshold’, the internal regulator is turned on and the quiescent current can be measured above this threshold. The enable (EN) input allows the user to control turning on or off the regulator. To enable the AP6502A, EN must be pulled above the ‘EN Lockout Threshold Voltage’ and ...
U-153 UC3855A/B High Performance Power Factor Preregulator
... QMAIN drain-to-source node capacitance charges to VO and the main diode begins to supply current to the load. Since the node capacitance initially holds the drain voltage to zero, the turn off losses are significantly reduced. It can be seen through the above description that the operation of the co ...
... QMAIN drain-to-source node capacitance charges to VO and the main diode begins to supply current to the load. Since the node capacitance initially holds the drain voltage to zero, the turn off losses are significantly reduced. It can be seen through the above description that the operation of the co ...
Brushless Motor Revolution WRAM Seminar 2005 Introduction
... A Himax 2812-0850 has a 28mm outside diameter of the motor, a 12mm magnet length and a Kv of 850 RPM/volt • What is Kv and what does it mean in selecting a motor? o Kv or the RPM/Volt constant is a number that relates how fast the motor will turn with an applied voltage WITH NO LOAD! Low Kv inne ...
... A Himax 2812-0850 has a 28mm outside diameter of the motor, a 12mm magnet length and a Kv of 850 RPM/volt • What is Kv and what does it mean in selecting a motor? o Kv or the RPM/Volt constant is a number that relates how fast the motor will turn with an applied voltage WITH NO LOAD! Low Kv inne ...
Issues, Models and Solutions for Triac Modulated Phase Dimming of
... current may not be enough to charge C1 to the diac breakover voltage during one half cycle. Fig. 5 represents a simulation for alpha of 90 degrees when the load is considered as either LEDs or a resistor. Notice that for this simulation, the diac voltage peaks at around 10V and never reaches its bre ...
... current may not be enough to charge C1 to the diac breakover voltage during one half cycle. Fig. 5 represents a simulation for alpha of 90 degrees when the load is considered as either LEDs or a resistor. Notice that for this simulation, the diac voltage peaks at around 10V and never reaches its bre ...
SGM3142 6-Channel Charge Pump White LED Driver with Low
... parameters such as input and output ripple, power efficiency, maximum supply current by charge pump, and start-up time. To reduce the input and output ripple effectively, the low ESR ceramic capacitors are recommended. Generally, to reduce the output ripple, increasing the output capacitance COUT is ...
... parameters such as input and output ripple, power efficiency, maximum supply current by charge pump, and start-up time. To reduce the input and output ripple effectively, the low ESR ceramic capacitors are recommended. Generally, to reduce the output ripple, increasing the output capacitance COUT is ...
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.