Choosing between a soft starter and a variable frequency drive to fit
... The mechanical system requires a gentle start to relieve torque spikes and tension associated with normal startup (for example, conveyors, belt-driven systems, gears, and so on) ...
... The mechanical system requires a gentle start to relieve torque spikes and tension associated with normal startup (for example, conveyors, belt-driven systems, gears, and so on) ...
Energy Regeneration
... Trains during normal operation are required to stop quite frequently and sometimes quickly. The kinetic energy can be dissipated into friction brakes assisted by dynamic braking resistors to reduce wear and tear on mechanical components. With DC electrified railways, it is not possible to return pow ...
... Trains during normal operation are required to stop quite frequently and sometimes quickly. The kinetic energy can be dissipated into friction brakes assisted by dynamic braking resistors to reduce wear and tear on mechanical components. With DC electrified railways, it is not possible to return pow ...
Understanding Steering Diode Arrays
... ProTek Devices, based in Tempe, Arizona USA, is a manufacturer of Transient Voltage Suppression (TVS) products designed specifically for the protection of electronic systems from the effects of lightning, Electrostatic Discharge (ESD), Nuclear Electromagnetic Pulse (NEMP), inductive switching and EM ...
... ProTek Devices, based in Tempe, Arizona USA, is a manufacturer of Transient Voltage Suppression (TVS) products designed specifically for the protection of electronic systems from the effects of lightning, Electrostatic Discharge (ESD), Nuclear Electromagnetic Pulse (NEMP), inductive switching and EM ...
Experiment 9
... In the circuit shown in Figure 9-1 below, the source voltage, Vs, is “chopped” to produce an average voltage somewhere between 0% and 100% of Vs. Thus the average value of the voltage applied to the Motor, Vm, is controlled by closing and opening the “switch”, Q1. To close the switch, a firing signa ...
... In the circuit shown in Figure 9-1 below, the source voltage, Vs, is “chopped” to produce an average voltage somewhere between 0% and 100% of Vs. Thus the average value of the voltage applied to the Motor, Vm, is controlled by closing and opening the “switch”, Q1. To close the switch, a firing signa ...
Application Note 600V CoolMOS™ C6 Mastering the Art of Slowness
... on and during turn off. There is no increase in di/dt during turn on and only a small increase in di/dt during turn off when the current changes from 5A to 16A. This gives the designer safety in peak current conditions such as AC cycle drop out, start up or load jumps as the di/dt basically stays in ...
... on and during turn off. There is no increase in di/dt during turn on and only a small increase in di/dt during turn off when the current changes from 5A to 16A. This gives the designer safety in peak current conditions such as AC cycle drop out, start up or load jumps as the di/dt basically stays in ...
Low Frequency AC Transmission System
... International Journal for Research in Applied Science & Engineering Technology (IJRASET) with same rated current but only one third of original rated voltage. At the receiving end, a thyristor based cycloconverter is used as an interface between the low frequency side and 60Hz or 50Hz power grid. Th ...
... International Journal for Research in Applied Science & Engineering Technology (IJRASET) with same rated current but only one third of original rated voltage. At the receiving end, a thyristor based cycloconverter is used as an interface between the low frequency side and 60Hz or 50Hz power grid. Th ...
turns ratio meter 4167f - Tinsley Instrumentation Ltd
... TINSLEY, A DIVISION OF HARTEST PRECISION INSTRUMENTS LTD ...
... TINSLEY, A DIVISION OF HARTEST PRECISION INSTRUMENTS LTD ...
Assemble Manual - DIY, audio, electronics
... 5. You can use screw terminals or solder hookup wire to the PCB. Soldering is generally the best connection from an electrical / signal point of view but may be unpractical. Note that you should avoid soldering on/off the cables, especially the power and speaker cables. As these cables are usually q ...
... 5. You can use screw terminals or solder hookup wire to the PCB. Soldering is generally the best connection from an electrical / signal point of view but may be unpractical. Note that you should avoid soldering on/off the cables, especially the power and speaker cables. As these cables are usually q ...
Maurizio Delfanti - CIRED • International Conference on Electricity
... Voltage events: voltage dips Definition: a temporary reduction of the voltage at a point in the electrical supply system below a specified start threshold. Note 1: For the purpose of this standard, the dip start threshold is equal to 90 % of the reference voltage. Note 2: Typically, a dip is associa ...
... Voltage events: voltage dips Definition: a temporary reduction of the voltage at a point in the electrical supply system below a specified start threshold. Note 1: For the purpose of this standard, the dip start threshold is equal to 90 % of the reference voltage. Note 2: Typically, a dip is associa ...
high speed low power multi–threshold voltage flip flops
... voltage techniques. High threshold voltage MOSFET transistors are applied on the non-critical paths of flip-flops in order to suppress the stand-by leakage-current, while low threshold voltage MOSFET transistors are applied on the cross-coupled critical path which in fact is the speed bottle neck of ...
... voltage techniques. High threshold voltage MOSFET transistors are applied on the non-critical paths of flip-flops in order to suppress the stand-by leakage-current, while low threshold voltage MOSFET transistors are applied on the cross-coupled critical path which in fact is the speed bottle neck of ...
power model - TAMU Computer Science People Pages
... Vdd : voltage scaling, variable voltage processor f: low-frequency and clock gating ...
... Vdd : voltage scaling, variable voltage processor f: low-frequency and clock gating ...
28169VPROOF .fm
... Voltage proof tests, also called “high pot” tests, are used to check if a capacitor has a breakdown failure mode occurring at a certain test voltage. The detection of breakdown is done by a current detection, specified if exceeding a certain limit (cut off current). For all capacitor technologies th ...
... Voltage proof tests, also called “high pot” tests, are used to check if a capacitor has a breakdown failure mode occurring at a certain test voltage. The detection of breakdown is done by a current detection, specified if exceeding a certain limit (cut off current). For all capacitor technologies th ...
Power Conscious Embedded Processors
... Vdd : voltage scaling, variable voltage processor f: low-frequency and clock gating ...
... Vdd : voltage scaling, variable voltage processor f: low-frequency and clock gating ...
Signal Injection in Sensorless PMSM Drives Equipped With Inverter
... and produce bearing currents. Voltage harmonics cause acoustic noise and power losses; the losses caused by eddy currents are a special concern in high-speed solid-rotor motors. ...
... and produce bearing currents. Voltage harmonics cause acoustic noise and power losses; the losses caused by eddy currents are a special concern in high-speed solid-rotor motors. ...
The capacitive divider in medium-voltage switchgear
... However, the technology used offers much more than merely a continual visual “yes”/“no” indication. If a suitable device is connected onto the measurement capacitance of the divider, the value of the voltage can also be continuously displayed. If this cost-effective device is used directly at the in ...
... However, the technology used offers much more than merely a continual visual “yes”/“no” indication. If a suitable device is connected onto the measurement capacitance of the divider, the value of the voltage can also be continuously displayed. If this cost-effective device is used directly at the in ...
Light Emitting Diodes and Digital Circuits I
... and NOR gates, on page 238 of DH. We consider the TTL (transistor-transistor logic) device called the 7400. It is part of the TTL family of digital logic devices whose names all begin with 74. All members of this family operate from a power supply of + 5V. The members are all compatible in that outp ...
... and NOR gates, on page 238 of DH. We consider the TTL (transistor-transistor logic) device called the 7400. It is part of the TTL family of digital logic devices whose names all begin with 74. All members of this family operate from a power supply of + 5V. The members are all compatible in that outp ...
Power electronics
Power electronics is the application of solid-state electronics to the control and conversion of electric power. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, time-varying energy-processing electronic systems with fast dynamics.The first high power electronic devices were mercury-arc valves. In modern systems the conversion is performed with semiconductor switching devices such as diodes, thyristors and transistors, pioneered by R. D. Middlebrook and others beginning in the 1950s. In contrast to electronic systems concerned with transmission and processing of signals and data, in power electronics substantial amounts of electrical energy are processed. An AC/DC converter (rectifier) is the most typical power electronics device found in many consumer electronic devices, e.g. television sets, personal computers, battery chargers, etc. The power range is typically from tens of watts to several hundred watts. In industry a common application is the variable speed drive (VSD) that is used to control an induction motor. The power range of VSDs start from a few hundred watts and end at tens of megawatts.The power conversion systems can be classified according to the type of the input and output power AC to DC (rectifier) DC to AC (inverter) DC to DC (DC-to-DC converter) AC to AC (AC-to-AC converter)