three phase scr control and regulation board
... ¾ The phase reference signals are filtered to reduce harmonic content above the fundamental ¾ On-board Feedback Control – eliminates the need for an external controller ¾ Improved logic implementation with state-of-theart FPGA ¾ Optional on board Isolated voltage and current feedback inputs ¾ Indust ...
... ¾ The phase reference signals are filtered to reduce harmonic content above the fundamental ¾ On-board Feedback Control – eliminates the need for an external controller ¾ Improved logic implementation with state-of-theart FPGA ¾ Optional on board Isolated voltage and current feedback inputs ¾ Indust ...
AP1530
... transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier circuit. An enable function, an over current protection and a short circuit protection are built inside, and when OCP or SCP happens, the oper ...
... transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier circuit. An enable function, an over current protection and a short circuit protection are built inside, and when OCP or SCP happens, the oper ...
Design and Implementation of a Stand-Alone Remote Terminal Unit Prachi Sharma
... Voltages and currents in the transmission lines are of very high value. These high values can’t be measured directly. They have to be converted into some lower values which can be conveniently connected to measuring and recording instruments. For this purpose, current transformers (CT) and potential ...
... Voltages and currents in the transmission lines are of very high value. These high values can’t be measured directly. They have to be converted into some lower values which can be conveniently connected to measuring and recording instruments. For this purpose, current transformers (CT) and potential ...
PIR Sensor Light Switch PT8A2641-2642/2645
... RELAY (TRIAC): an output pin set as a RELAY driving (active high) output for the PT8A2642/6/8, or as a TRIAC driving (active low) output for the PT8A2641/5/7. The output active duration is controlled by the OSCD oscillating period. CDS and CDSO: CDS has a schmitt trigger input structure. It is used ...
... RELAY (TRIAC): an output pin set as a RELAY driving (active high) output for the PT8A2642/6/8, or as a TRIAC driving (active low) output for the PT8A2641/5/7. The output active duration is controlled by the OSCD oscillating period. CDS and CDSO: CDS has a schmitt trigger input structure. It is used ...
Full-Bridge DMOS PWM Motor Driver A4950
... The A4950 is designed to operate DC motors. The output drivers are all low-RDS(on) , N-channel DMOS drivers that feature internal synchronous rectification to reduce power dissipation. The current in the output full bridge is regulated with fixed off-time pulse width modulated (PWM) control circuitr ...
... The A4950 is designed to operate DC motors. The output drivers are all low-RDS(on) , N-channel DMOS drivers that feature internal synchronous rectification to reduce power dissipation. The current in the output full bridge is regulated with fixed off-time pulse width modulated (PWM) control circuitr ...
78ET-2
... (a) Why is plain overload protection insufficient in the case of large alternators? (b) Draw a line diagram of connections showing how to protect an alternator against overload, leakage and internal short circuit. SECTION C Compare methods of obtaining speed regulation of three-phase induction motor ...
... (a) Why is plain overload protection insufficient in the case of large alternators? (b) Draw a line diagram of connections showing how to protect an alternator against overload, leakage and internal short circuit. SECTION C Compare methods of obtaining speed regulation of three-phase induction motor ...
16826 - Public Address System
... 250 microvolts. Magentic: 5 microvolts. High Level: 4 millivolts. Line: 400 millivolts. Input attenuator set for maximum gain. ...
... 250 microvolts. Magentic: 5 microvolts. High Level: 4 millivolts. Line: 400 millivolts. Input attenuator set for maximum gain. ...
ADM483 数据手册DataSheet 下载
... The preferred transmission line for RS-485 communications is a twisted pair. Twisted pair cable tends to cancel commonmode noise and the magnetic fields generated by the current flowing through each wire, thereby reducing the effective inductance of the pair. The ADM483 is designed for bidirectional ...
... The preferred transmission line for RS-485 communications is a twisted pair. Twisted pair cable tends to cancel commonmode noise and the magnetic fields generated by the current flowing through each wire, thereby reducing the effective inductance of the pair. The ADM483 is designed for bidirectional ...
SM72295 Photovoltaic Full Bridge Driver (Rev. E)
... In the application the HS nodes are clamped by the body diode of the external lower N-MOSFET, therefore the HS node will generally not exceed –1V. However, in some applications, board resistance and inductance may result in the HS node exceeding this stated voltage transiently. If negative transient ...
... In the application the HS nodes are clamped by the body diode of the external lower N-MOSFET, therefore the HS node will generally not exceed –1V. However, in some applications, board resistance and inductance may result in the HS node exceeding this stated voltage transiently. If negative transient ...
1 Introduction 2
... connection with conveyor belts, screws, elevators, ventilators, pumps etc. Depending on the application a type with one, two or even more trip points is used. Both a Max. and a Min. trip point is often useful together with ventilators and pumps. With two-speed motors two trip points are used, one fo ...
... connection with conveyor belts, screws, elevators, ventilators, pumps etc. Depending on the application a type with one, two or even more trip points is used. Both a Max. and a Min. trip point is often useful together with ventilators and pumps. With two-speed motors two trip points are used, one fo ...
Light Bulb Volume Expander
... Once the average expansion characteristics are established, the tapped adjustable resistors (“Fixed” position of switch) may be set to the rheostat values; the rheostats are then used for the custom setting of particular music levels or types of music. The device as described is for a single channel ...
... Once the average expansion characteristics are established, the tapped adjustable resistors (“Fixed” position of switch) may be set to the rheostat values; the rheostats are then used for the custom setting of particular music levels or types of music. The device as described is for a single channel ...
RF Filtering for Audio Amplifier Circuits
... An important aspect of the audio amplifier circuit is the output RF filter, required to suppress RF interference produced by fast output transitions of the amplifier.[1] Early techniques for filtering the amplifier output in car stereos used traditional through-hole type feedthru capacitors. Over ti ...
... An important aspect of the audio amplifier circuit is the output RF filter, required to suppress RF interference produced by fast output transitions of the amplifier.[1] Early techniques for filtering the amplifier output in car stereos used traditional through-hole type feedthru capacitors. Over ti ...
AN439 87C751 fast NiCad charger - Rcl
... versions of the buck and boost circuits are known as the forward and flyback converters. Since the input supply voltage is greater than the maximum expected output voltage and no isolation is required, the buck topology is a good choice for simplicity and high efficiency. The required values of indu ...
... versions of the buck and boost circuits are known as the forward and flyback converters. Since the input supply voltage is greater than the maximum expected output voltage and no isolation is required, the buck topology is a good choice for simplicity and high efficiency. The required values of indu ...
300 - B. 10 3 i C. 12 5 i D. 3 10 i - + ? + - - - - + - - - A. 7 14i + - +
... 10. The expression (1 i)3 is equivalent to A. 2 2i B. 2 2i C. 1 i D. 3i ...
... 10. The expression (1 i)3 is equivalent to A. 2 2i B. 2 2i C. 1 i D. 3i ...
Fundamentals of Linear Electronics Integrated & Discrete
... (1,2,3,4,1,2,3,4...) how much power would the display use? ...
... (1,2,3,4,1,2,3,4...) how much power would the display use? ...
MAX8875 150mA, Low-Dropout Linear Regulator with Power-OK Output General Description
... The MAX8875 features a 1.1Ω (typ) P-channel MOSFET pass transistor. This provides several advantages over similar designs using PNP pass transistors, including longer battery life. The P-channel MOSFET requires no base drive, which reduces quiescent current significantly. PNP-based regulators waste ...
... The MAX8875 features a 1.1Ω (typ) P-channel MOSFET pass transistor. This provides several advantages over similar designs using PNP pass transistors, including longer battery life. The P-channel MOSFET requires no base drive, which reduces quiescent current significantly. PNP-based regulators waste ...
Circuit & Packet Switching
... ways of achieving the same goal. ► The transfer of data across networks. ► Both methods have advantages and disadvantages. ...
... ways of achieving the same goal. ► The transfer of data across networks. ► Both methods have advantages and disadvantages. ...
Electrical Motor Starters
... surge from the supply generator. This causes a severe voltage dip which affects every load on the system. Reduced voltage starting will limit the starting surge current. One way to reduce the initial voltage supplied to the motor is to step it down using a transformer. Then, when the motor has accel ...
... surge from the supply generator. This causes a severe voltage dip which affects every load on the system. Reduced voltage starting will limit the starting surge current. One way to reduce the initial voltage supplied to the motor is to step it down using a transformer. Then, when the motor has accel ...
BL Non-Isolated Power DPM Big Little Digital Panel Meters
... The MODUTEC BL is easy-to-read and provides a variety of indicators — all in a compact unit. • 3 1/2 digit readout, full scale 1999 display • 1/2" high digits on a high contrast LCD • Auto-polarity (-) displayed Ease of assembly is one of the BL’s most valuable benefits. • 13 pin connection, solder ...
... The MODUTEC BL is easy-to-read and provides a variety of indicators — all in a compact unit. • 3 1/2 digit readout, full scale 1999 display • 1/2" high digits on a high contrast LCD • Auto-polarity (-) displayed Ease of assembly is one of the BL’s most valuable benefits. • 13 pin connection, solder ...
YAESU Y-1 INTERFACE SUPPLEMENT For YAESU: FT-857,FT
... power to rig. d) When using this interface with the FT-991, set menu item 143 to “LAMP. e) The tune-up wire that is temporarily connected to the Interface keyline will be used to set the transmit power of the interface control. f) After assuring rig is connected to a proper load, connect blue lead t ...
... power to rig. d) When using this interface with the FT-991, set menu item 143 to “LAMP. e) The tune-up wire that is temporarily connected to the Interface keyline will be used to set the transmit power of the interface control. f) After assuring rig is connected to a proper load, connect blue lead t ...
Switched-mode power supply
A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.