Effect of harmonics on current ratings and voltage drop
... harmonic currents. Multiplying the 50 Hz conductor resistance by the appropriate factor, Cr, from the above table will give the resistance at that frequency. If Cr x Rf is substituted for Rh in equation 2 it is clear that Rf will cancel in the numerator and the denominator. Thus the factors given in ...
... harmonic currents. Multiplying the 50 Hz conductor resistance by the appropriate factor, Cr, from the above table will give the resistance at that frequency. If Cr x Rf is substituted for Rh in equation 2 it is clear that Rf will cancel in the numerator and the denominator. Thus the factors given in ...
Study Notes for Test 1
... 30. What is full wave rectification? When a rectifier bridge is used to avoid loss of energy, (due to loss of ½ the AC pulses, the pulses in wrong direction) all the pulses are used. We still get a pulsating DC current, but now we have more DC pulses per second which gives the same xray exposure in ...
... 30. What is full wave rectification? When a rectifier bridge is used to avoid loss of energy, (due to loss of ½ the AC pulses, the pulses in wrong direction) all the pulses are used. We still get a pulsating DC current, but now we have more DC pulses per second which gives the same xray exposure in ...
Problem: Error in Low Voltage, Low Current Measurements
... Problem: Error in Low Voltage, Low Current Measurements Potential Cause: Voltage Burden One of the biggest sources of error in measuring low currents from low voltage sources is voltage burden. Unlike an ideal ammeter, a shunt style ammeter (for example, in a DMM) has some resistance, and current flo ...
... Problem: Error in Low Voltage, Low Current Measurements Potential Cause: Voltage Burden One of the biggest sources of error in measuring low currents from low voltage sources is voltage burden. Unlike an ideal ammeter, a shunt style ammeter (for example, in a DMM) has some resistance, and current flo ...
productspec SMX700HGwordlogo
... PowerAlert UPS monitoring software is available via free download from www.tripplite.com for all common network and standalone operating systems. Ships with 2 cables, 1-USB to USB & 1-DB9 to DB9 ...
... PowerAlert UPS monitoring software is available via free download from www.tripplite.com for all common network and standalone operating systems. Ships with 2 cables, 1-USB to USB & 1-DB9 to DB9 ...
Sensorless six-step BLDC commutation
... hardware logic or a microprocessor lookup table to convert this three bit pattern into a six bit pattern that can be used to control the six transistor bridge. The three bit word can take on eight possible patterns but we only see six. Since a three phase set of sine waves are never either all posit ...
... hardware logic or a microprocessor lookup table to convert this three bit pattern into a six bit pattern that can be used to control the six transistor bridge. The three bit word can take on eight possible patterns but we only see six. Since a three phase set of sine waves are never either all posit ...
STK402-040
... Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in se ...
... Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in se ...
ametek programmable power
... simultaneously simulating up to 24 parallel channels for use with micro-inverters. “An essential part of this testing is to provide the inverter under test with accurate simulation of the PV array response to its maximum power point tracking (MPP) function. To perform this task, the power source mus ...
... simultaneously simulating up to 24 parallel channels for use with micro-inverters. “An essential part of this testing is to provide the inverter under test with accurate simulation of the PV array response to its maximum power point tracking (MPP) function. To perform this task, the power source mus ...
Synchronous Generator is a doubly excited machine
... coupling from a primary winding to a secondary winding, the two windings being separated by an air gap. In threephase induction motors, that are inherently self-starting, energy transfer is usually from the stator to either a wound rotor or a short-circuited squirrel cage rotor. Three-phase cage rot ...
... coupling from a primary winding to a secondary winding, the two windings being separated by an air gap. In threephase induction motors, that are inherently self-starting, energy transfer is usually from the stator to either a wound rotor or a short-circuited squirrel cage rotor. Three-phase cage rot ...
Three phase half controlled bridge converters
... corresponding phase supply voltage reverses. The frequency of output ripple frequency for a 3-phase half wave converter is fs, where fs is the input supply frequency. 3 The 3-phase half wave converter is not normally used in practical converter systems because of the disadvantage that the supply cur ...
... corresponding phase supply voltage reverses. The frequency of output ripple frequency for a 3-phase half wave converter is fs, where fs is the input supply frequency. 3 The 3-phase half wave converter is not normally used in practical converter systems because of the disadvantage that the supply cur ...
Maquette brochure KV 70 A4
... Machine is driven by an electrical motor. Machine is started or stopped by means of the foot pedal (stoppage is automatically done on completion of the filling). So both the operator’s hands are free. ...
... Machine is driven by an electrical motor. Machine is started or stopped by means of the foot pedal (stoppage is automatically done on completion of the filling). So both the operator’s hands are free. ...
B5-0631
... Electrochemical double layer capacitors (EDLCs), also known as supercapacitors, display high power (10 kW·kg-1) and extremely high cycle life (up to millions of cycles) [1]. Because of these characteristics EDLCs are currently considered as one of the most important electrochemical storage devices, ...
... Electrochemical double layer capacitors (EDLCs), also known as supercapacitors, display high power (10 kW·kg-1) and extremely high cycle life (up to millions of cycles) [1]. Because of these characteristics EDLCs are currently considered as one of the most important electrochemical storage devices, ...
Part Three - The Agilent E3631A Power Supply 1. Setting the Output
... verify that two ways: with a short circuit, and with an LED. 3) First, note the voltage and current displays: the voltage is very close to 5.000 V, and the current is 0.000A (since nothing is connected to the + and terminals of the 6 V supply). Also, at the right side of the display a "CV" is showin ...
... verify that two ways: with a short circuit, and with an LED. 3) First, note the voltage and current displays: the voltage is very close to 5.000 V, and the current is 0.000A (since nothing is connected to the + and terminals of the 6 V supply). Also, at the right side of the display a "CV" is showin ...
Design of Three Phase PWM Voltage Source Inverter
... get a waveform identical to a square wave to which the inverter got it's name. In ac-motor drives the switch-mode dc-to-ac inverters are applied and un interruptible supplies of ac power where the central equitable is to provide a sinusoidal ac output where magnitude and frequency the couple can be ...
... get a waveform identical to a square wave to which the inverter got it's name. In ac-motor drives the switch-mode dc-to-ac inverters are applied and un interruptible supplies of ac power where the central equitable is to provide a sinusoidal ac output where magnitude and frequency the couple can be ...
3A1981
... 3. The base shall be secured to a compatible DIN-Rail ground bar using the methods described in this instruction. 4. Proper grounding continuity shall be determined. 5. Please install the protector module inaccordance with the applicable requirements of the National Electrical Code®, Article 800 or ...
... 3. The base shall be secured to a compatible DIN-Rail ground bar using the methods described in this instruction. 4. Proper grounding continuity shall be determined. 5. Please install the protector module inaccordance with the applicable requirements of the National Electrical Code®, Article 800 or ...
Variable-frequency drive
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.