Heathkit LG-1 - Orange County (California) Amateur Radio Club
... built in relaxation oscillator provides modulation when selected. The G-1 was modified a couple of times during its manufacturing run; these were mostly cosmetic changes including a new handle and front panel paint. The G1 uses just two tubes, a 6X5 rectifier in the power supply and a 6SN7 dual-trio ...
... built in relaxation oscillator provides modulation when selected. The G-1 was modified a couple of times during its manufacturing run; these were mostly cosmetic changes including a new handle and front panel paint. The G1 uses just two tubes, a 6X5 rectifier in the power supply and a 6SN7 dual-trio ...
Assignment 3 - UniMAP Portal
... A balanced delta-connected load is supplied by a 60-Hz three-phase source with a line voltage of 240V. Each load phase draws 6 kW at a lagging power factor of 0.8. Find: (a) the load impedance per phase (b) the line current (c) The value of capacitance needed to be connected in parallel with each lo ...
... A balanced delta-connected load is supplied by a 60-Hz three-phase source with a line voltage of 240V. Each load phase draws 6 kW at a lagging power factor of 0.8. Find: (a) the load impedance per phase (b) the line current (c) The value of capacitance needed to be connected in parallel with each lo ...
AN2063 - STMicroelectronics
... The TL431 is a cost-effective solution for the constant voltage. The weakness of this device, in this special application, is its operation current higher than 1 mA. In order to get good voltage regulation performance at full load condition, a biasing resistor is very important, but this leads to an ...
... The TL431 is a cost-effective solution for the constant voltage. The weakness of this device, in this special application, is its operation current higher than 1 mA. In order to get good voltage regulation performance at full load condition, a biasing resistor is very important, but this leads to an ...
Complex Power
... The maximum power transfer theorem states that, to obtain maximum external power from a source with a finite internal resistance, the resistance of the load must be equal to the resistance of the source as viewed from the output terminals. The theorem results in maximum power transfer, and not maxim ...
... The maximum power transfer theorem states that, to obtain maximum external power from a source with a finite internal resistance, the resistance of the load must be equal to the resistance of the source as viewed from the output terminals. The theorem results in maximum power transfer, and not maxim ...
a multilevel energy buffer and voltage modulator for
... Micro inverters operating into the single-phase grid from solar photovoltaic (PV) panels or other low-voltage sources must buffer the twice-line-frequency variations between the energy sourced by the PV panel and that required for the grid. Moreover, in addition to operating over wide average power ...
... Micro inverters operating into the single-phase grid from solar photovoltaic (PV) panels or other low-voltage sources must buffer the twice-line-frequency variations between the energy sourced by the PV panel and that required for the grid. Moreover, in addition to operating over wide average power ...
Document
... Abstract: In this paper, a novel three phase modular multilevel inverter (MMLI) is proposed. The proposed inverter consists of primary cell and repetitive modular cells which are connected in series arrangement with the primary cell. Therefore, the proposed topology is able to get more output voltag ...
... Abstract: In this paper, a novel three phase modular multilevel inverter (MMLI) is proposed. The proposed inverter consists of primary cell and repetitive modular cells which are connected in series arrangement with the primary cell. Therefore, the proposed topology is able to get more output voltag ...
HERO Jr POWER SUPPLY PROTECTION
... Also of note the Futaba CH74 crystal pair, intended for AM use and for “Airtronics Only” radio control cars etc, has a TX crystal with a sticky label 75.670 TX and 75.670 RX. Removing these sticky labels reveals 37.835 engraved on the TX crystal and 75.215 MHz on the RX crystal. This RX crystal wor ...
... Also of note the Futaba CH74 crystal pair, intended for AM use and for “Airtronics Only” radio control cars etc, has a TX crystal with a sticky label 75.670 TX and 75.670 RX. Removing these sticky labels reveals 37.835 engraved on the TX crystal and 75.215 MHz on the RX crystal. This RX crystal wor ...
A Simple Control Scheme for Single
... where reduction of installation area is essential [5]. The numbers of phases on input and output sides are independent of each other in case of matrix converter. There is no limitation on output frequency [6]. A matrix converter can be used as a full fourquadrant power supply without any additional ...
... where reduction of installation area is essential [5]. The numbers of phases on input and output sides are independent of each other in case of matrix converter. There is no limitation on output frequency [6]. A matrix converter can be used as a full fourquadrant power supply without any additional ...
A Simple Control Scheme for Single
... SPMC operating as frequency changer, and it is shown in Fig.5 whose operation is as follows. Initially two sample signals are generated with voltages magnitudes and frequencies as Vin, fin and Vo, fo of input & required output respectively. Then they are inverted and both inverted and non-inverted s ...
... SPMC operating as frequency changer, and it is shown in Fig.5 whose operation is as follows. Initially two sample signals are generated with voltages magnitudes and frequencies as Vin, fin and Vo, fo of input & required output respectively. Then they are inverted and both inverted and non-inverted s ...
gsm based advanced transformer load sharing system using arm7
... GSM – Global System for Mobile Communication is used as a media which is used to control and monitor the transformer load from anywhere by sending a message. It has its own deterministic character. Thereby, here GSM is used to monitor and control the DC motor, Stepper motor, Temperature sensor and S ...
... GSM – Global System for Mobile Communication is used as a media which is used to control and monitor the transformer load from anywhere by sending a message. It has its own deterministic character. Thereby, here GSM is used to monitor and control the DC motor, Stepper motor, Temperature sensor and S ...
Photorelay White Paper Draft 3.qxd
... The information contained herein is subject to change without notice. • The Toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These ...
... The information contained herein is subject to change without notice. • The Toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These ...
review
... From the basic bridge configuration we see that two diodes(say D2 & D3) are conducting while the other two diodes (D1 & D4) are in off state during the period t = 0 to T/2.Accordingly for the negative cycle of the input the conducting diodes are D1 & D4 .Thus the polarity across the load is the same ...
... From the basic bridge configuration we see that two diodes(say D2 & D3) are conducting while the other two diodes (D1 & D4) are in off state during the period t = 0 to T/2.Accordingly for the negative cycle of the input the conducting diodes are D1 & D4 .Thus the polarity across the load is the same ...
Permanent-magnet motor-generator
... Whether or not the machine is “sensorless,” rotor position or phase EMF is sensed for commutation Pulse-width modulation (PWM), superimposed on commutation, indirectly “controls” speed by chopping current, & thus torque ...
... Whether or not the machine is “sensorless,” rotor position or phase EMF is sensed for commutation Pulse-width modulation (PWM), superimposed on commutation, indirectly “controls” speed by chopping current, & thus torque ...
Analog Pulse Width Modulation
... produces the desired signal gain of -1. The value of capacitor C1 must be chosen to limit the bandwidth of the error amplifier to below the switching frequency in order to ensure stability of the system. This will also limit the signal bandwidth, so a value must be chosen which does not interfere wi ...
... produces the desired signal gain of -1. The value of capacitor C1 must be chosen to limit the bandwidth of the error amplifier to below the switching frequency in order to ensure stability of the system. This will also limit the signal bandwidth, so a value must be chosen which does not interfere wi ...
Series Catalog Page
... INHIBIT signal The INHIBIT signal is used to turn the power supply ON and OFF. TTL “1”or OPEN – will turn on the power supply. (For normal operation leave the signal not connected.) TTL “0” – will turn off the power supply. SYNC IN signal The SYNC IN signal is used to allow the power supply frequenc ...
... INHIBIT signal The INHIBIT signal is used to turn the power supply ON and OFF. TTL “1”or OPEN – will turn on the power supply. (For normal operation leave the signal not connected.) TTL “0” – will turn off the power supply. SYNC IN signal The SYNC IN signal is used to allow the power supply frequenc ...
Click here for presentation material
... They are placed into “bins” according to each characteristic ...
... They are placed into “bins” according to each characteristic ...
Download B9300 Datasheet
... Sharer will disable the frequency control function in the load sharer. This is used when running parallel to the grid (utility) or other frequency determining power sources. Please note that the dead band zone in the T4800 Load Sharer will be reduced ...
... Sharer will disable the frequency control function in the load sharer. This is used when running parallel to the grid (utility) or other frequency determining power sources. Please note that the dead band zone in the T4800 Load Sharer will be reduced ...
CN-0029: 利用AD5390/AD5391/AD5392 DAC实现8-16通道可编程电压 以及出色的温度漂移性能
... minimize switching noise at the DVDD supply pins. Additional decoupling using a series connected ferrite bead may be required. The AD5390/AD5391/AD5392 digital (DVDD) power supply can operate off a 3 V or 5 V supply, which provides for maximum flexibility when interfacing to digital components. Bot ...
... minimize switching noise at the DVDD supply pins. Additional decoupling using a series connected ferrite bead may be required. The AD5390/AD5391/AD5392 digital (DVDD) power supply can operate off a 3 V or 5 V supply, which provides for maximum flexibility when interfacing to digital components. Bot ...
Testing Power Sources for Stability
... signal paths in a circuit, one inverting and one non-inverting, and happen at the transition in frequency where the dominant path changes from inverting to non-inverting or vice-versa. In the case of boost and buck-boost converters, a sudden increase in duty cycle causes a momentary reduction in out ...
... signal paths in a circuit, one inverting and one non-inverting, and happen at the transition in frequency where the dominant path changes from inverting to non-inverting or vice-versa. In the case of boost and buck-boost converters, a sudden increase in duty cycle causes a momentary reduction in out ...
Spectrum Management Systems
... 1) Voltage: 400VAC, 3ØY 2) Frequency: 50/60 Hz. 3) Line Current: 16A Maximum 4) Load Capacity: 11.04 KVA 5) Power Cord: 10' (3m), #12AWG(3.3mm )/5C 6) Connector: IEC309-16A 7) Indicators: Power-on, LED 8) Transient Voltage Suppression (TVS) 9) Integral EMI Filter B. Output Characteristics: 1) Voltag ...
... 1) Voltage: 400VAC, 3ØY 2) Frequency: 50/60 Hz. 3) Line Current: 16A Maximum 4) Load Capacity: 11.04 KVA 5) Power Cord: 10' (3m), #12AWG(3.3mm )/5C 6) Connector: IEC309-16A 7) Indicators: Power-on, LED 8) Transient Voltage Suppression (TVS) 9) Integral EMI Filter B. Output Characteristics: 1) Voltag ...
UPS 7000HX-T3U 300, 400, and 500kVA
... Periodic inspection, calibration, and adjustment of the UPS’s control and monitoring systems are highly recommended to ensure continued optimal performance and the highest level of reliability. Regular maintenance can help detect early signs of degradation in components such as air filters, capacitor ...
... Periodic inspection, calibration, and adjustment of the UPS’s control and monitoring systems are highly recommended to ensure continued optimal performance and the highest level of reliability. Regular maintenance can help detect early signs of degradation in components such as air filters, capacitor ...
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.