Teccor® brand Thyristors Miscellaneous Design Tips and
... for conduction angles less than 180º is derated because of the higher RMS current connected with high peak currents. ...
... for conduction angles less than 180º is derated because of the higher RMS current connected with high peak currents. ...
edexcel hnc/d
... If the information is digital, it sends the information for each channel as a package of digits one channel at a time. BUFFERS and STORES Very often a signal value needs to be stored. This is usually done by converting them into a digital number and storing them in a memory chip. If a system is rece ...
... If the information is digital, it sends the information for each channel as a package of digits one channel at a time. BUFFERS and STORES Very often a signal value needs to be stored. This is usually done by converting them into a digital number and storing them in a memory chip. If a system is rece ...
ADVANCED FIRING MODULE • Cost Effective Upgrades
... expensive components such as motors, SCR power converters, and bus bars. By keeping the expensive "muscle" components and replacing only the control equipment “brains," your Nidec solution will: • Achieve new system performance • Improve machine uptime • Reduce upgrade downtime • Lower capital mater ...
... expensive components such as motors, SCR power converters, and bus bars. By keeping the expensive "muscle" components and replacing only the control equipment “brains," your Nidec solution will: • Achieve new system performance • Improve machine uptime • Reduce upgrade downtime • Lower capital mater ...
GEK-15021 Volts Per Hertz Regulator Panel
... fed to the primary windings of the saturating transformers LlST, L2ST, &d L3ST. Each of these potential transformers consists of a primary and a dual secondary. One of the secondary outputs is clipped to approximately 36 volts to provide a circuit that is voltage insensitive, within a reasonable ran ...
... fed to the primary windings of the saturating transformers LlST, L2ST, &d L3ST. Each of these potential transformers consists of a primary and a dual secondary. One of the secondary outputs is clipped to approximately 36 volts to provide a circuit that is voltage insensitive, within a reasonable ran ...
Current Mode Control Techniques for the Reduction of THD
... sort of input current shaping for single-phase equipment. proposed for current-mode control in DC-DC converters. Active current shaping is usually used in the power range Most of these techniques rely on mathematical models of the around 2 kW in order to reduce the volume of the converter, power con ...
... sort of input current shaping for single-phase equipment. proposed for current-mode control in DC-DC converters. Active current shaping is usually used in the power range Most of these techniques rely on mathematical models of the around 2 kW in order to reduce the volume of the converter, power con ...
系统功能
... AC 0 angle with high precision auto-detection AC phase angle of 0 through isolation amplifier then input to the MCU for high-precision detection and analysis. The phase shift rate is less than 1%, thus achieve high-precision with phase modulation AC output together. Synchronous High-frequency Modula ...
... AC 0 angle with high precision auto-detection AC phase angle of 0 through isolation amplifier then input to the MCU for high-precision detection and analysis. The phase shift rate is less than 1%, thus achieve high-precision with phase modulation AC output together. Synchronous High-frequency Modula ...
Synchronous Current Control of Three phase Induction motor by
... PWM current control is one of the methods whose task is to force the actual current to track reference wave by means of switches. In low speed region of the machine, when CEMF is low, there is no difficulty in current controller tracking. However at higher speed, the current controller will saturate ...
... PWM current control is one of the methods whose task is to force the actual current to track reference wave by means of switches. In low speed region of the machine, when CEMF is low, there is no difficulty in current controller tracking. However at higher speed, the current controller will saturate ...
Buck/Boost DC–DC Converter Topology with Soft Switching for PV
... various types of renewable energy sources are solar energy and wind energy have become very popular and difficult. Photovoltaic (PV) sources are used in many applications. Grid-connected photovoltaic (PV) system is reducing investment outlay because it does not need battery to store energy. Addition ...
... various types of renewable energy sources are solar energy and wind energy have become very popular and difficult. Photovoltaic (PV) sources are used in many applications. Grid-connected photovoltaic (PV) system is reducing investment outlay because it does not need battery to store energy. Addition ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
... and tmax ϵ max {tL,tR} remain unchanged ;tmin-={tmin-Tsh/4}andtmax+={tmax+Tsh/4} are the modified times to generate the shoot-through states;SX1 and SY1 are the switching control signals for the upper switches, SX2 and SY2 are that for the lower switches,{X,Y}ϵ{L,R} . In this way, the shoot-through s ...
... and tmax ϵ max {tL,tR} remain unchanged ;tmin-={tmin-Tsh/4}andtmax+={tmax+Tsh/4} are the modified times to generate the shoot-through states;SX1 and SY1 are the switching control signals for the upper switches, SX2 and SY2 are that for the lower switches,{X,Y}ϵ{L,R} . In this way, the shoot-through s ...
Driving LEDs with a PIC Microcontroller Application Note
... brightness groups. With LEDs, it must be noted that diodes of the same type are divided into various brightness groups. The usage of different brightness groups leads to a different brightness of the LEDs at the same current. With the PWM-Signal the brightness can be adjusted. The programmable input ...
... brightness groups. With LEDs, it must be noted that diodes of the same type are divided into various brightness groups. The usage of different brightness groups leads to a different brightness of the LEDs at the same current. With the PWM-Signal the brightness can be adjusted. The programmable input ...
Phase Shifted Full Bridge, Zero Voltage
... Rather than driving both of the diagonal full bridge switches together, a deliberate delay will be introduced between their turn-on commands with the Phase Shifted approach. This delay will be adjusted by the voltage loop of the control circuitry, and essentially results as a phase shift between the ...
... Rather than driving both of the diagonal full bridge switches together, a deliberate delay will be introduced between their turn-on commands with the Phase Shifted approach. This delay will be adjusted by the voltage loop of the control circuitry, and essentially results as a phase shift between the ...
DTMF decoder
... the high group filter filters high group frequency signal output. Each filter output is followed by a zero-crossing detector with hysteresis. When each signal amplitude at the output exceeds the specified level, it is transferred to full swing logic signal. When input signals are recognized to be ef ...
... the high group filter filters high group frequency signal output. Each filter output is followed by a zero-crossing detector with hysteresis. When each signal amplitude at the output exceeds the specified level, it is transferred to full swing logic signal. When input signals are recognized to be ef ...
Radar Transmitter
... The process begins with a low voltage being applied to the filament, which causes it to heat up. Remember, in a magnetron tube, the filament is also the cathode. The temperature rise causes increased molecular activity within the cathode, to the extent that it begins to "boil off" or emit electron ...
... The process begins with a low voltage being applied to the filament, which causes it to heat up. Remember, in a magnetron tube, the filament is also the cathode. The temperature rise causes increased molecular activity within the cathode, to the extent that it begins to "boil off" or emit electron ...
ZXTN2011G 100V NPN LOW SATURATION MEDIUM POWER LOW SATURATION TRANSISTOR IN SOT223 SUMMARY
... This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company r ...
... This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company r ...
MONOLITHIC PHASE LOCKED LOOPS (PLL IC 565)
... output voltage in order to stabilize the VCO frequency. ...
... output voltage in order to stabilize the VCO frequency. ...
SCD Encapsulated - Sola/Hevi-Duty
... supplies designed to power industrial control instrumentation devices and equipment where AC power is not convenient or accessible. With high reliability and wide input range, these units can operate through the most difficult factory floor conditions around the globe. “User friendly” applies to the ...
... supplies designed to power industrial control instrumentation devices and equipment where AC power is not convenient or accessible. With high reliability and wide input range, these units can operate through the most difficult factory floor conditions around the globe. “User friendly” applies to the ...
Paralleled DC to AC Inverters for Telecom Applications
... enables the connection of up to 16 units in parallel. We can achieve two important advantages with parallel configuration – flexibility to increase the load if needed in the future, and high reliability of the output load (N +1) in that the N inverter supplies the load and the extra inverter is also ...
... enables the connection of up to 16 units in parallel. We can achieve two important advantages with parallel configuration – flexibility to increase the load if needed in the future, and high reliability of the output load (N +1) in that the N inverter supplies the load and the extra inverter is also ...
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.