vsd control - ssdservice.pl
... reduced. Occasionally, the pump could deliver a high flow even though the system is completely cut off. ...
... reduced. Occasionally, the pump could deliver a high flow even though the system is completely cut off. ...
Inverters deliver power solution
... Inverters are rated in watts, which refers to the maximum continuous power it can supply to a 240V appliance and often will have a peak rating (the amount of power that can be supplied above the continuous rating for a short period). For example, a 2500W– 5000W peak inverter can cope with a starting ...
... Inverters are rated in watts, which refers to the maximum continuous power it can supply to a 240V appliance and often will have a peak rating (the amount of power that can be supplied above the continuous rating for a short period). For example, a 2500W– 5000W peak inverter can cope with a starting ...
Type 4 self-contained single beam for access control FF
... done on delivery to shorten time spent on setting up the system. The mechanics of both column and mirrors is designed to fulfill the requirements of the optics, and eases beam alignment adjustment. Moreover, a laser pen can be used to adjust beam alignment quickly. The integrated functions simplify ...
... done on delivery to shorten time spent on setting up the system. The mechanics of both column and mirrors is designed to fulfill the requirements of the optics, and eases beam alignment adjustment. Moreover, a laser pen can be used to adjust beam alignment quickly. The integrated functions simplify ...
Datasheet
... +29dB. This gain can be changed by programming from +22dB to -37dB in 1dB steps. The user can also change the gain via Register VOL (See section "Handsfree"). The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage at LO1 of LO2 to 1V p. It prevent ...
... +29dB. This gain can be changed by programming from +22dB to -37dB in 1dB steps. The user can also change the gain via Register VOL (See section "Handsfree"). The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage at LO1 of LO2 to 1V p. It prevent ...
DS32EV100 Programmable Single Equalizer
... The CML inputs and outputs must have a controlled differential impedance of 100Ω. It is preferable to route CML lines exclusively on one layer of the board, particularly for the input traces. The use of vias should be avoided if possible. If vias must be used, they should be used sparingly and must ...
... The CML inputs and outputs must have a controlled differential impedance of 100Ω. It is preferable to route CML lines exclusively on one layer of the board, particularly for the input traces. The use of vias should be avoided if possible. If vias must be used, they should be used sparingly and must ...
Aalborg Universitet A Novel Harmonic Elimination Approach in Three-Phase Multi-Motor Drives
... (uncontrolled) or thyristor-based rectifiers (phase-controlled) of less complexity and cost are still widely used in Adjustable Speed Drives (ASD). In addition, the undesirable nonlinearity of the conventional AC-DC conversion stage may become significant, when a large number of industrial converter ...
... (uncontrolled) or thyristor-based rectifiers (phase-controlled) of less complexity and cost are still widely used in Adjustable Speed Drives (ASD). In addition, the undesirable nonlinearity of the conventional AC-DC conversion stage may become significant, when a large number of industrial converter ...
Full-text
... voltage unbalance is undesirable since it leads to negative consequences, primarily to overheating of electric motors, generation of harmonics, additional power losses, are detrimental for power electronic converters and adjustable speed drives [1], [2], [3]. Therefore techniques of voltage unbalanc ...
... voltage unbalance is undesirable since it leads to negative consequences, primarily to overheating of electric motors, generation of harmonics, additional power losses, are detrimental for power electronic converters and adjustable speed drives [1], [2], [3]. Therefore techniques of voltage unbalanc ...
Ultra-Low Noise Amplifier
... careful consideration of resistor values. The feedback and gain set resistors (Rf and Rg) and the non-inverting source impedance (Rsource) all contribute noise to the circuit and can easily dominate the overall noise if their values are too high. The datasheet is specified with an Rg of 25Ω, at whic ...
... careful consideration of resistor values. The feedback and gain set resistors (Rf and Rg) and the non-inverting source impedance (Rsource) all contribute noise to the circuit and can easily dominate the overall noise if their values are too high. The datasheet is specified with an Rg of 25Ω, at whic ...
IOSR Journal of Electrical and Electronics Engineering (IOSRJEEE)
... A power distribution system is a very complex system. It is important to remove any system faults or abnormalities so that the rest of the power distribution network is not interrupted or damaged. When a fault or an abnormality event occurs somewhere in a power distribution network, the voltage is a ...
... A power distribution system is a very complex system. It is important to remove any system faults or abnormalities so that the rest of the power distribution network is not interrupted or damaged. When a fault or an abnormality event occurs somewhere in a power distribution network, the voltage is a ...
Magnetics Design 4 - Power Transformer Design
... loop changes duty cycle D inversely proportional to VIN to maintain a constant output voltage, VO. (VIND = n•VO'), where n is the turns ratio NP/NS, and VO’ equals output voltage VO plus diode forward voltage drop at full load. At a fixed switching frequency and with normal steady-state operation, t ...
... loop changes duty cycle D inversely proportional to VIN to maintain a constant output voltage, VO. (VIND = n•VO'), where n is the turns ratio NP/NS, and VO’ equals output voltage VO plus diode forward voltage drop at full load. At a fixed switching frequency and with normal steady-state operation, t ...
Distribution of Active and Reactive Energy in a Power Line
... A number of features are used to evaluate the amount and quality of the energy which is supplied and used. The most significant ones are those, accepted in IEEE 1459-2000 Standard [1]. Some new definitions of the different types of powers, of the Power factor and distortions are given in it, based o ...
... A number of features are used to evaluate the amount and quality of the energy which is supplied and used. The most significant ones are those, accepted in IEEE 1459-2000 Standard [1]. Some new definitions of the different types of powers, of the Power factor and distortions are given in it, based o ...
STGW25H120DF
... maximize the efficiency of high switching frequency converters. Moreover, a slightly positive VCE(sat) temperature coefficient and very tight parameter distribution result in safer paralleling ...
... maximize the efficiency of high switching frequency converters. Moreover, a slightly positive VCE(sat) temperature coefficient and very tight parameter distribution result in safer paralleling ...
MAX1574 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN
... MAX1574 goes through soft-start, bringing the LED current up to ILED_. Dimming is then done by pulsing EN low (500ns to 500µs pulse width). Each pulse reduces the LED current by 10%, so after one pulse the LED current is 0.9 x ILED. The tenth pulse reduces the current by 5%, so the ILED_ current red ...
... MAX1574 goes through soft-start, bringing the LED current up to ILED_. Dimming is then done by pulsing EN low (500ns to 500µs pulse width). Each pulse reduces the LED current by 10%, so after one pulse the LED current is 0.9 x ILED. The tenth pulse reduces the current by 5%, so the ILED_ current red ...
Component Testing Using an Oscilloscope with
... This test method can apply a fair amount of current to the DUT. For example, if there is a 0.7 V drop across a diode, then that leaves a maximum of 1.8 V across the waveform generator’s 50-ohm output resistance. This means the current flowing through the diode can exceed 36 mA. If the component bein ...
... This test method can apply a fair amount of current to the DUT. For example, if there is a 0.7 V drop across a diode, then that leaves a maximum of 1.8 V across the waveform generator’s 50-ohm output resistance. This means the current flowing through the diode can exceed 36 mA. If the component bein ...
PQ Circle Diagram Based Parameter Measurement for Permanent
... frequencies, a PWM inverter with 7.5 kHz carrier frequency is utilized. A digital power meter detects (DPM) the active power, reactive power, and input voltage. Load conditions for the PMSM is adjusted by changing the external resistance through the generator (PMSG) that connects directly to the PMS ...
... frequencies, a PWM inverter with 7.5 kHz carrier frequency is utilized. A digital power meter detects (DPM) the active power, reactive power, and input voltage. Load conditions for the PMSM is adjusted by changing the external resistance through the generator (PMSG) that connects directly to the PMS ...
SVC for Mitigating 50 Hz Resonance of a Long 400 kV ac
... the successful, reliable and continuous operation of the Auas SVC presents special high demands on the design, quality, functionality and layout of the individual components and sub-systems as well as the SVC scheme as a whole. Furthermore, the Auas substation is relatively remote from technical sup ...
... the successful, reliable and continuous operation of the Auas SVC presents special high demands on the design, quality, functionality and layout of the individual components and sub-systems as well as the SVC scheme as a whole. Furthermore, the Auas substation is relatively remote from technical sup ...
Motor Control
... This section provides a basic understanding of how resistors are used for motor control, and the information required to design a resistor configuration. To order a resistor assembly, simply obtain the data needed for your motor type and call the factory. Our engineers will design a package that bes ...
... This section provides a basic understanding of how resistors are used for motor control, and the information required to design a resistor configuration. To order a resistor assembly, simply obtain the data needed for your motor type and call the factory. Our engineers will design a package that bes ...
Evaluates: MAX1898 MAX1898 Evaluation Kit General Description Features
... The LED on the EV kit is driven by the CHG pin. Depending on the Li+ cell’s charging status, the pin is low or high impedance, thus turning the LED ON or OFF. If the Li+ cell cannot be charged to 2.5V in less than 1/4 of the total programmed charge time, the charger will go into fault mode. During t ...
... The LED on the EV kit is driven by the CHG pin. Depending on the Li+ cell’s charging status, the pin is low or high impedance, thus turning the LED ON or OFF. If the Li+ cell cannot be charged to 2.5V in less than 1/4 of the total programmed charge time, the charger will go into fault mode. During t ...
MVW01 - Medium Voltage Drive
... - ND = Normal Duty: maximum current/power with 115% overload for 60 seconds, every 10 minutes. - HD = Heavy Duty: maximum current/power with 150% overload for 60 seconds, every 10 minutes. - Motor power is for reference only and it is based on 4P motor, with 0.87 P.F. and 97% efficiency at full load ...
... - ND = Normal Duty: maximum current/power with 115% overload for 60 seconds, every 10 minutes. - HD = Heavy Duty: maximum current/power with 150% overload for 60 seconds, every 10 minutes. - Motor power is for reference only and it is based on 4P motor, with 0.87 P.F. and 97% efficiency at full load ...
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.