electrical machines elec
... The essence of transformer action requires only the existence of time-varying mutual flux linking two windings. (58) Such action can occur for two windings coupled through air, but coupling between the windings can be made much more effectively using a core of iron or other ferromagnetic material, b ...
... The essence of transformer action requires only the existence of time-varying mutual flux linking two windings. (58) Such action can occur for two windings coupled through air, but coupling between the windings can be made much more effectively using a core of iron or other ferromagnetic material, b ...
TPS61175 SEPIC Design Application Report ...................................................................................... Design Example
... The loop bandwidth assumption of 5 kHz may have to be modified later. The designer selected C2 = 2 × 22 mF, 50-V output capacitors instead of one 47-mF capacitor because the resonance frequency of most 47-mF capacitors is above the 1-MHz switching frequency. If capacitors with higher ESRs than those ...
... The loop bandwidth assumption of 5 kHz may have to be modified later. The designer selected C2 = 2 × 22 mF, 50-V output capacitors instead of one 47-mF capacitor because the resonance frequency of most 47-mF capacitors is above the 1-MHz switching frequency. If capacitors with higher ESRs than those ...
TechTopics
... rated short-circuit current. This 117% TRV withstand value applies at reduced fault current values of 10% of rated short-circuit current, as shown in C37.06-2000, table 6. Interruption of load currents has not been discussed, as the resulting TRV is much lower than the TRV for fault currents. The re ...
... rated short-circuit current. This 117% TRV withstand value applies at reduced fault current values of 10% of rated short-circuit current, as shown in C37.06-2000, table 6. Interruption of load currents has not been discussed, as the resulting TRV is much lower than the TRV for fault currents. The re ...
179 the mouse valve series ev, et, ec series valves
... R-482 valves are recognized under the Component Program of Underwriters Laboratories, Inc. File No. MH 13573 ...
... R-482 valves are recognized under the Component Program of Underwriters Laboratories, Inc. File No. MH 13573 ...
PDF
... BREAKER in which sulphur hexafluoride gas is used for arc extinction. VACUUM CIRCUIT BREAKER in which vacuum is used for arc extinction. The circuit breaker used in this work is SF6 Circuit Breaker. Vacuum Circuit Breaker incorporates a specially designed and completely sealed Interrupter to perform ...
... BREAKER in which sulphur hexafluoride gas is used for arc extinction. VACUUM CIRCUIT BREAKER in which vacuum is used for arc extinction. The circuit breaker used in this work is SF6 Circuit Breaker. Vacuum Circuit Breaker incorporates a specially designed and completely sealed Interrupter to perform ...
KG2317111721
... Three-phase AC/DC/AC and AC/AC converters with variable frequency (VF) and variable voltage operation have found wide applications in the industry. The most popular configuration uses voltage source inverter (VSI) with a diode rectifier as the front end for adjustable speed drives (ASDs), uninterrup ...
... Three-phase AC/DC/AC and AC/AC converters with variable frequency (VF) and variable voltage operation have found wide applications in the industry. The most popular configuration uses voltage source inverter (VSI) with a diode rectifier as the front end for adjustable speed drives (ASDs), uninterrup ...
A Modular Subsea Direct-Current Electrical
... that operates at current source mode. All of the subsea loads are connected in series. The example configuration does not require a DC circuit breaker to break the current and isolate the faulty equipment. Instead, it requires a bypass switch that provides an alternative path for the line current wh ...
... that operates at current source mode. All of the subsea loads are connected in series. The example configuration does not require a DC circuit breaker to break the current and isolate the faulty equipment. Instead, it requires a bypass switch that provides an alternative path for the line current wh ...
Means for minmizing pulse reflections in linear delay lines loaded
... pulses from different parts of SEAC which have fallen sure synchronization of the pulses from source 1 with out of synchronization owing to the characteristics of the other pulses from other sources. circuits through which they have passed. For these and The action of the circuit shown in Figure 1 w ...
... pulses from different parts of SEAC which have fallen sure synchronization of the pulses from source 1 with out of synchronization owing to the characteristics of the other pulses from other sources. circuits through which they have passed. For these and The action of the circuit shown in Figure 1 w ...
ZZ013748752
... and phase-to-phase voltages. Voltage sag is caused by a fault in the utility system, a fault within the customer’s facility or a large increase of the load current, like starting a motor or transformer energizing. Typical faults are single-phase or multiple-phase short circuits, which leads to high ...
... and phase-to-phase voltages. Voltage sag is caused by a fault in the utility system, a fault within the customer’s facility or a large increase of the load current, like starting a motor or transformer energizing. Typical faults are single-phase or multiple-phase short circuits, which leads to high ...
DU36723729
... the bidirectional switch of this topology made up of S+ and S- is not controlled to be turned-ON simultaneously, therefore current can only flow in a predefined direction, defined by the currently turnedON switch. Modifying the switching strategy this inverter can inject reactive power into the grid ...
... the bidirectional switch of this topology made up of S+ and S- is not controlled to be turned-ON simultaneously, therefore current can only flow in a predefined direction, defined by the currently turnedON switch. Modifying the switching strategy this inverter can inject reactive power into the grid ...
Introduction To Current Source Power Units
... A logical question that may come to mind is: Why do you fix drive current in some power units and make it variable in others?” Another question often asked is: “Why do you offer variable drive current and what level of current should I use in my application if it is variable?” ...
... A logical question that may come to mind is: Why do you fix drive current in some power units and make it variable in others?” Another question often asked is: “Why do you offer variable drive current and what level of current should I use in my application if it is variable?” ...
Sensor - ABB Group
... Fig. 2. Integrated combi sensor in AX1 panel (AIS). HxWxD 2240x650x1050 (ABB Distribution AB) Another trend in the switchgear industry is the aim for shorter delivery times. Here the complicated logistics of conventional CT's and VT's is a major problem. To specify a transformer, the information on ...
... Fig. 2. Integrated combi sensor in AX1 panel (AIS). HxWxD 2240x650x1050 (ABB Distribution AB) Another trend in the switchgear industry is the aim for shorter delivery times. Here the complicated logistics of conventional CT's and VT's is a major problem. To specify a transformer, the information on ...
Testing Resistance Welding Transformers
... operate at a higher frequency than 60 Hz and have diodes on the output side of the transformer. The operating range of Inverter DC transformers is between 1000 and 1200 Hz. Question 8: What is the relationship between KVA and output current? Answer: A transformer’s KVA rating is a thermal rating and ...
... operate at a higher frequency than 60 Hz and have diodes on the output side of the transformer. The operating range of Inverter DC transformers is between 1000 and 1200 Hz. Question 8: What is the relationship between KVA and output current? Answer: A transformer’s KVA rating is a thermal rating and ...
Surge arresters, A71-H16X-X2610
... than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specification is suitable for use in a particular customer application. 2. We also point out that in individua ...
... than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether an EPCOS product with the properties described in the product specification is suitable for use in a particular customer application. 2. We also point out that in individua ...
ixrfd631 - IXYS Colorado
... 30 A Low-Side RF MOSFET Driver Applications Information Introduction Circuits capable of very high switching speeds and high frequency operation require close attention to several important issues. Key elements include circuit loop inductance, Vcc bypassing, and grounding. ...
... 30 A Low-Side RF MOSFET Driver Applications Information Introduction Circuits capable of very high switching speeds and high frequency operation require close attention to several important issues. Key elements include circuit loop inductance, Vcc bypassing, and grounding. ...
Katsuhiro Hata, Takehiro Imura, Yoichi Hori, Maximum Efficiency
... C. Secondary current on wireless power transfer Fig. 4 shows the WPT system for maximum efficiency control using the DC-DC converter. In this paper, a rectangular voltage is used as a power source on the primary side. When the SS circuit topology is applied to the WPT system, the transfer function f ...
... C. Secondary current on wireless power transfer Fig. 4 shows the WPT system for maximum efficiency control using the DC-DC converter. In this paper, a rectangular voltage is used as a power source on the primary side. When the SS circuit topology is applied to the WPT system, the transfer function f ...
Fig. 4(a) Waveforms for positive and negative half cycles of supply
... of the supply current should be below 19%. A PMSM motor when fed by a diode bridge rectifier (DBR) with a high value of dc link capacitor draws peaky current which can lead to a THD of supply current of the order of 65% and power factor as low as 0.8. In this paper a DBR followed by a power factor c ...
... of the supply current should be below 19%. A PMSM motor when fed by a diode bridge rectifier (DBR) with a high value of dc link capacitor draws peaky current which can lead to a THD of supply current of the order of 65% and power factor as low as 0.8. In this paper a DBR followed by a power factor c ...
Mercury-arc valve
A mercury-arc valve or mercury-vapor rectifier or (UK) mercury-arc rectifier is a type of electrical rectifier used for converting high-voltage or high-current alternating current (AC) into direct current (DC). It is a type of cold cathode gas-filled tube, but is unusual in that the cathode, instead of being solid, is made from a pool of liquid mercury and is therefore self-restoring. As a result, mercury-arc valves were much more rugged, long-lasting and could carry much higher currents than most other types of gas discharge tube.Invented in 1902 by Peter Cooper Hewitt, mercury-arc rectifiers were used to provide power for industrial motors, electric railways, streetcars, and electric locomotives, as well as for radio transmitters and for high-voltage direct current (HVDC) power transmission. They were the primary method of high power rectification before the advent of semiconductor rectifiers, such as diodes, thyristors and gate turn-off thyristors (GTOs) in the 1970s.