Principles of Doubly-Fed Induction Generators (DFIG)
... also serve as a doubly-fed induction generator. In this case, mechanical power at the machine shaft is converted into electrical power supplied to the ac power network via both the stator and rotor windings. Furthermore, the machine operates like a synchronous generator whose synchronous speed (i.e. ...
... also serve as a doubly-fed induction generator. In this case, mechanical power at the machine shaft is converted into electrical power supplied to the ac power network via both the stator and rotor windings. Furthermore, the machine operates like a synchronous generator whose synchronous speed (i.e. ...
section 26 29 23 - variable frequency motor controllers
... A. Shop drawings shall be provided that indicate the exact electric wiring diagram for each VFD, which includes a minimum of 2 circuit diagrams (power and control schematic of all VFD functions and a control ladder logic diagram). These drawings shall be delivered and approved by the AE and the Owne ...
... A. Shop drawings shall be provided that indicate the exact electric wiring diagram for each VFD, which includes a minimum of 2 circuit diagrams (power and control schematic of all VFD functions and a control ladder logic diagram). These drawings shall be delivered and approved by the AE and the Owne ...
PECL Clocks and Termination
... broad classes – DC coupled and AC coupled. Within these two classes, there are other possibilities, depending on the particular circuit requirements. When selecting an oscillator, the voltage would be selected to match the circuit being driven. In that case, there are no DC offsets to overcome so th ...
... broad classes – DC coupled and AC coupled. Within these two classes, there are other possibilities, depending on the particular circuit requirements. When selecting an oscillator, the voltage would be selected to match the circuit being driven. In that case, there are no DC offsets to overcome so th ...
SKY77318 数据资料DataSheet下载
... circuitry for 50 Ω input and output impedances and a Power Amplifier Control (PAC) block with an internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC function and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction ...
... circuitry for 50 Ω input and output impedances and a Power Amplifier Control (PAC) block with an internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC function and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction ...
Emission Limits for Customer Facilities Connected - Hydro
... disturbances caused by equipment in customer facilities connected to, or to be connected to, the Hydro-Québec transmission system. These limits apply to harmonic emissions, load or current imbalances, rapid voltage changes and flicker at the interface between a customer facility and the transmission ...
... disturbances caused by equipment in customer facilities connected to, or to be connected to, the Hydro-Québec transmission system. These limits apply to harmonic emissions, load or current imbalances, rapid voltage changes and flicker at the interface between a customer facility and the transmission ...
MAX1232 Microprocessor Monitor General Description Features
... external pullup resistor is not necessary. ...
... external pullup resistor is not necessary. ...
FREQUENCY DIVIDERS DESIGN FOR MULTI
... adopted on this point, but one result of the high speed wireless networks diffusion, is the overcrowding of the electromagnetic spectrum. An increasingly number of new standards and regulations (FCC in the United States), allows the efficient use of the available frequency spectrum, and intelligent ...
... adopted on this point, but one result of the high speed wireless networks diffusion, is the overcrowding of the electromagnetic spectrum. An increasingly number of new standards and regulations (FCC in the United States), allows the efficient use of the available frequency spectrum, and intelligent ...
SCADAPack ES Hardware Manual
... any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. If you have any suggestions for improvements or amendments or have found errors in this publication, please notify us. No part of this document may be reproduced in any form or by any ...
... any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. If you have any suggestions for improvements or amendments or have found errors in this publication, please notify us. No part of this document may be reproduced in any form or by any ...
MicroConverter , Dual 16-Bit ADCs with Embedded 62 kB Flash MCU ADuC836
... temperature sensor and a PGA (allowing direct measurement of low level signals). The ADCs with on-chip digital filtering and programmable output data rates are intended for the measurement of wide dynamic range, low frequency signals, such as those in weigh scale, strain gage, pressure transducer, o ...
... temperature sensor and a PGA (allowing direct measurement of low level signals). The ADCs with on-chip digital filtering and programmable output data rates are intended for the measurement of wide dynamic range, low frequency signals, such as those in weigh scale, strain gage, pressure transducer, o ...
Fast fault detection for power distribution systems
... performed so that the fault detection equipment can obtain information of the state of the system. The fault detection equipment and some general methods of fault detection are briefly described. Some algorithms and their possible adaptation to fast fault detection are described. A common principle o ...
... performed so that the fault detection equipment can obtain information of the state of the system. The fault detection equipment and some general methods of fault detection are briefly described. Some algorithms and their possible adaptation to fast fault detection are described. A common principle o ...
doc
... rating for those applications requiring faster recharge times. Actual available charge current will still depend on output load level and power factor. ...
... rating for those applications requiring faster recharge times. Actual available charge current will still depend on output load level and power factor. ...
wdyrc tech sheet
... 13.If servicer encounters an emission reading over 4mw/cm2 the servicer is to cease repair and contact Amana Service Department immediately for further direction. Amana Refrigeration, Inc. will contact the proper Government Agency upon verification of the test results. ...
... 13.If servicer encounters an emission reading over 4mw/cm2 the servicer is to cease repair and contact Amana Service Department immediately for further direction. Amana Refrigeration, Inc. will contact the proper Government Agency upon verification of the test results. ...
SR810 User`s Manual - Stanford Research Systems
... *SRE?i queries only bit i. Query the Serial Poll Status Byte. If i is included, only bit i is queried. Set (Query) the Power On Status Clear bit to Set (1) or Clear (0). Set (Query) the Error Status Enable Register to the decimal value i (0-255). ERRE i,j sets bit i (0-7) to j (0 or 1). ERRE? querie ...
... *SRE?i queries only bit i. Query the Serial Poll Status Byte. If i is included, only bit i is queried. Set (Query) the Power On Status Clear bit to Set (1) or Clear (0). Set (Query) the Error Status Enable Register to the decimal value i (0-255). ERRE i,j sets bit i (0-7) to j (0 or 1). ERRE? querie ...
ZXMP10A13F Product Summary Features
... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
PDR 9000 Operation and Maintenance Manual
... © 1999 by Vacuum Products Group of MKS Instruments, Inc. All rights reserved. ALCONOX is a registered trademark of Alconox, Inc. IgniTorr is a trademark of MKSTM Instruments of HPSTM, Inc. Inconel is a registered trademark of Inco Alloys International, Inc. Scotch-Brite is a trademark of 3M. SensaVa ...
... © 1999 by Vacuum Products Group of MKS Instruments, Inc. All rights reserved. ALCONOX is a registered trademark of Alconox, Inc. IgniTorr is a trademark of MKSTM Instruments of HPSTM, Inc. Inconel is a registered trademark of Inco Alloys International, Inc. Scotch-Brite is a trademark of 3M. SensaVa ...
Atmel ATA6622C/ATA6624C/ATA6626C LIN Bus Transceiver with 3.3V (5V) Regulator and Watchdog Features
... same functionality as the Atmel ATA6622C; however, it uses a 5V/85mA regulator. The Atmel ATA6626C has the same functionality as Atmel ATA6624C without a TXD time-out timer. The voltage regulator is able to source 85mA, but the output current can be boosted by using an external NPN transistor. This ...
... same functionality as the Atmel ATA6622C; however, it uses a 5V/85mA regulator. The Atmel ATA6626C has the same functionality as Atmel ATA6624C without a TXD time-out timer. The voltage regulator is able to source 85mA, but the output current can be boosted by using an external NPN transistor. This ...
XFR600-2 Operating Manual
... Exercise caution when using and calibrating a power supply. High energy levels can be stored at the output voltage terminals on a power supply in normal operation. In addition, potentially lethal voltages exist in the power circuit and on the output and sense connectors of a power supply with a rate ...
... Exercise caution when using and calibrating a power supply. High energy levels can be stored at the output voltage terminals on a power supply in normal operation. In addition, potentially lethal voltages exist in the power circuit and on the output and sense connectors of a power supply with a rate ...
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.