OWTS M 60
... ` PC with WIN XP and WLAN for system control ` Statistical PD fault acquisition, online processing ` Menu-driven unit to operate the test sequence ` Portable design, low weight, easy set-up on-site ...
... ` PC with WIN XP and WLAN for system control ` Statistical PD fault acquisition, online processing ` Menu-driven unit to operate the test sequence ` Portable design, low weight, easy set-up on-site ...
The new three-phase power supplies CP
... The CP-T range of three-phase power supply units is the youngest member of ABB’s power supply family. In terms of design and functionality, the new range perfectly supplements the existing products and extends the range appropriately. The devices can be supplied with a threephase voltage as well as ...
... The CP-T range of three-phase power supply units is the youngest member of ABB’s power supply family. In terms of design and functionality, the new range perfectly supplements the existing products and extends the range appropriately. The devices can be supplied with a threephase voltage as well as ...
The Generalized Discontinuous PWM Scheme for Three
... in motor drives, active filters, unified power flow controllers in power systems, and uninterrupted power supplies to generate controllable frequency and ac voltage magnitudes using various pulsewidth modulation (PWM) strategies. Of the possible PWM methods, the carrier-based PWM is very popular due ...
... in motor drives, active filters, unified power flow controllers in power systems, and uninterrupted power supplies to generate controllable frequency and ac voltage magnitudes using various pulsewidth modulation (PWM) strategies. Of the possible PWM methods, the carrier-based PWM is very popular due ...
Plixus PS - Televic Conference
... Description The Plixus PS is a 1U high 19" rack mount 48 VDC/1000W power supply. The front panel is equipped with a rocker mains switch with built-in indicator and a 48 V indicator. ...
... Description The Plixus PS is a 1U high 19" rack mount 48 VDC/1000W power supply. The front panel is equipped with a rocker mains switch with built-in indicator and a 48 V indicator. ...
ApplicationNoteChris..
... registers. The MSP430F2013 includes a five channel multiplexed AD converter. Therefor up to five separate inputs can be monitored by the microcontroller. The SD16INCHx bits, where x is the channel (0 – 4), select the analog input for conversion. The SD16AEx bits, where x is the input pin, enables or ...
... registers. The MSP430F2013 includes a five channel multiplexed AD converter. Therefor up to five separate inputs can be monitored by the microcontroller. The SD16INCHx bits, where x is the channel (0 – 4), select the analog input for conversion. The SD16AEx bits, where x is the input pin, enables or ...
Implementing Temperature-Based Variable Fan Speed Control in
... Linear Voltage Control: This method varies the DC voltage at the VDD terminal of the fan in a linear manner. For example, a +12V nominal fan modulated linearly to +8V would theoretically run at 66.7% RPM. Though this seems relatively simple, there are drawbacks. All BDC fans have a “stall voltage” t ...
... Linear Voltage Control: This method varies the DC voltage at the VDD terminal of the fan in a linear manner. For example, a +12V nominal fan modulated linearly to +8V would theoretically run at 66.7% RPM. Though this seems relatively simple, there are drawbacks. All BDC fans have a “stall voltage” t ...
Power electronics interfaces initial presentation
... • The inductance gives an indication of electric inertia. Inductors will tend to hold its current fixed. • Any attempt to change the current in an inductor will be answered with an opposing voltage by the inductor. If the current tends to drop, the voltage generated will tend to act as an electromot ...
... • The inductance gives an indication of electric inertia. Inductors will tend to hold its current fixed. • Any attempt to change the current in an inductor will be answered with an opposing voltage by the inductor. If the current tends to drop, the voltage generated will tend to act as an electromot ...
Document
... which utilises four switching devices together with two series connected capacitors is able to reduce the cost, switching losses and improve the reliability of system. In this topology, when the current control of phases A and B is achieved successfully, the current control of phase C which is conne ...
... which utilises four switching devices together with two series connected capacitors is able to reduce the cost, switching losses and improve the reliability of system. In this topology, when the current control of phases A and B is achieved successfully, the current control of phase C which is conne ...
EUP3412 1.5A/1.5MHz, Synchronous Step-Down Converter with Soft Start
... operation, the EUP3412 regulates output voltage by switching at a constant frequency and then modulating the power transferred to the load each cycle using PWM comparator. The duty cycle is controlled by three weighted differential signals: the output of error amplifier, the main switch sense voltag ...
... operation, the EUP3412 regulates output voltage by switching at a constant frequency and then modulating the power transferred to the load each cycle using PWM comparator. The duty cycle is controlled by three weighted differential signals: the output of error amplifier, the main switch sense voltag ...
Space Vecor Modulated Three Level Neutral Point Clamped Inverter
... NPC/H-bridge hybrid inverters, and Alston is developing flying-capacitor multilevel inverter drives. All these drive systems operate at medium voltage (MV) levels, typically from 2300V to 7200V. This thesis focuses on high power three-level neutral point clamped inverter using space vector modulatio ...
... NPC/H-bridge hybrid inverters, and Alston is developing flying-capacitor multilevel inverter drives. All these drive systems operate at medium voltage (MV) levels, typically from 2300V to 7200V. This thesis focuses on high power three-level neutral point clamped inverter using space vector modulatio ...
problems
... “off” resistance of 1MΩ. In comparison, their “on” resistances are negligible. For a supply voltage of 1 volt, find the leakage current of a two-input NOR gate as a function of its input logic states. (b) What is the leakage current of an inverter in this technology? (c) Construct a 2-to-1 multiplex ...
... “off” resistance of 1MΩ. In comparison, their “on” resistances are negligible. For a supply voltage of 1 volt, find the leakage current of a two-input NOR gate as a function of its input logic states. (b) What is the leakage current of an inverter in this technology? (c) Construct a 2-to-1 multiplex ...
Product Data Sheet: Power Amplifier — Type 2706
... The Power Amplifier Type 2706 has been designed to drive small vibration exciters, particularly the Brüel & Kjær Vibration Exciter Type 4809. It can also be used to drive the Mini-Shaker Type 4810 to full rating. For this application, the maximum output current should be limited to 1.8 A. The power ...
... The Power Amplifier Type 2706 has been designed to drive small vibration exciters, particularly the Brüel & Kjær Vibration Exciter Type 4809. It can also be used to drive the Mini-Shaker Type 4810 to full rating. For this application, the maximum output current should be limited to 1.8 A. The power ...
FAN5333A/FAN5333B High Efficiency, High Current Serial LED Driver with 30V Integrated Switch
... current-mode boost converter. The FAN5333A/FAN5333B improves the performance of battery powered equipment by significantly minimizing the spectral distribution of noise at the input caused by the switching action of the regulator. In order to facilitate effective noise filtering, the switching frequ ...
... current-mode boost converter. The FAN5333A/FAN5333B improves the performance of battery powered equipment by significantly minimizing the spectral distribution of noise at the input caused by the switching action of the regulator. In order to facilitate effective noise filtering, the switching frequ ...
BDTIC www.BDTIC.com/infineon P o w e r M a n...
... for insufficient VCIN voltage. VDRV supplies the floating high-side drive – consisting of an active boot circuit and the low-side drive circuit. A second UVLO circuitry, sensing the BOOT voltage level, is implemented to prevent false GH turn on during insufficient power supply level condition (BOOT ...
... for insufficient VCIN voltage. VDRV supplies the floating high-side drive – consisting of an active boot circuit and the low-side drive circuit. A second UVLO circuitry, sensing the BOOT voltage level, is implemented to prevent false GH turn on during insufficient power supply level condition (BOOT ...
Checking voltage- frequency ratio on variable- speed drives
... field is generated from the applied voltage and its strength is proportional to the V/Hz ratio. Normally the motor is designed to work with the local mains voltage (230 V/400 V or 120 V/208 V) and mains frequency (50 Hz or 60 Hz). The nominal values are shown on the motor type plate. When the motor ...
... field is generated from the applied voltage and its strength is proportional to the V/Hz ratio. Normally the motor is designed to work with the local mains voltage (230 V/400 V or 120 V/208 V) and mains frequency (50 Hz or 60 Hz). The nominal values are shown on the motor type plate. When the motor ...
TAP 123- 2: Measuring the peak value (amplitude), peak-to
... and down. The amount of deflection per volt can be adjusted by changing the y-gain control on the oscilloscope - e.g. 2.0 V per division or 50 mV per division (the second is more sensitive so the same input signal will cause a bigger vertical deflection on this setting). ...
... and down. The amount of deflection per volt can be adjusted by changing the y-gain control on the oscilloscope - e.g. 2.0 V per division or 50 mV per division (the second is more sensitive so the same input signal will cause a bigger vertical deflection on this setting). ...
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.