Electrical Machines
... • When relative movement between the stator and the rotor poles occurs • Voltage is induced into these windings. • Subsequent induced magnetic field tends to slow movement and act like a “shock absorber” • Can be used to aid starting in a simular way to that of the ...
... • When relative movement between the stator and the rotor poles occurs • Voltage is induced into these windings. • Subsequent induced magnetic field tends to slow movement and act like a “shock absorber” • Can be used to aid starting in a simular way to that of the ...
EMC warnings
... installation and the operation. Portable and mobile HF-communication devices e.g. mobile phone can affect medical electrical devices. A use of other accessories and lines than the indicated, can lead to an increased sending or a reduced noise immunity of the equipment. The equipment has to be operat ...
... installation and the operation. Portable and mobile HF-communication devices e.g. mobile phone can affect medical electrical devices. A use of other accessories and lines than the indicated, can lead to an increased sending or a reduced noise immunity of the equipment. The equipment has to be operat ...
Equivalent Circuit Model
... The three-phase winding are displaced from each other by 120 electrical degrees in space Current flows in a phase coil produce a sinusoidally distributed mmf wave centered on the axis of the coil. Alternating current in each coil produces a pulsating mmf wave. Mmf waves are displaced by 120 degrees ...
... The three-phase winding are displaced from each other by 120 electrical degrees in space Current flows in a phase coil produce a sinusoidally distributed mmf wave centered on the axis of the coil. Alternating current in each coil produces a pulsating mmf wave. Mmf waves are displaced by 120 degrees ...
Power Fundamentals: Buck Regulator Architectures
... Calculating Switching Frequency • In most cases, switching frequency is determined by the output ripple voltage (ΔVOUT) resulting from the output capacitor’s ESR. The amplitude of ΔVOUT is described by the following two equations: ...
... Calculating Switching Frequency • In most cases, switching frequency is determined by the output ripple voltage (ΔVOUT) resulting from the output capacitor’s ESR. The amplitude of ΔVOUT is described by the following two equations: ...
A HIGH PERFORMANCE INDUCTION MOTOR DRIVE SYSTEM
... motor. The squirrel-cage induction motor voltage equations are based on an orthogonal d-q reference-rotating frame where the coordinates rotate with the controlled source frequency. This project presents a novel fuzzy logic controller for high performance induction motor drive system. The inputs of ...
... motor. The squirrel-cage induction motor voltage equations are based on an orthogonal d-q reference-rotating frame where the coordinates rotate with the controlled source frequency. This project presents a novel fuzzy logic controller for high performance induction motor drive system. The inputs of ...
General Licensing Class
... B. The diode prevents self discharge of the battery through the panel during times of low or no illumination. C. The diode limits the current flowing from the panel to a safe value. D. The diode greatly increases the efficiency during times of high illumination. ...
... B. The diode prevents self discharge of the battery through the panel during times of low or no illumination. C. The diode limits the current flowing from the panel to a safe value. D. The diode greatly increases the efficiency during times of high illumination. ...
Low-power Flash microcontroller reduces power consumption by up to 80% Flash microcontroller
... operates from 2.7 to 5.5 V and typically consumes only 8 µA at 85 °C. Compared to a conventional 80C51 microcontroller, it uses up to 80% less power, offers higher speeds at all voltage levels, and reduces design cost. It is a drop-in, software-compatible replacement for NXP P87C52, P87C52X2, P89C52 ...
... operates from 2.7 to 5.5 V and typically consumes only 8 µA at 85 °C. Compared to a conventional 80C51 microcontroller, it uses up to 80% less power, offers higher speeds at all voltage levels, and reduces design cost. It is a drop-in, software-compatible replacement for NXP P87C52, P87C52X2, P89C52 ...
Saftronics Inc.
... *1 The applicable standard motor refers to a 4 pole standard motor. *2 The rated capacity indicates a 460V input voltage. *3 Voltages greater than the source voltage cannot be output. *4 Amperage values in parentheses ( ) are applicable to operation with 3 kHz or lower carrier frequencies (F26 = 3 o ...
... *1 The applicable standard motor refers to a 4 pole standard motor. *2 The rated capacity indicates a 460V input voltage. *3 Voltages greater than the source voltage cannot be output. *4 Amperage values in parentheses ( ) are applicable to operation with 3 kHz or lower carrier frequencies (F26 = 3 o ...
A Novel Three-Phase and Four
... displace the need to build new or upgrade existing local distribution lines, eliminate the need for high spinning reserve, and enhance the power system reliability and security. [1-3]. Most DGs usually is connected in parallel and supply power into power grids as well as local loads. Therefore, DG m ...
... displace the need to build new or upgrade existing local distribution lines, eliminate the need for high spinning reserve, and enhance the power system reliability and security. [1-3]. Most DGs usually is connected in parallel and supply power into power grids as well as local loads. Therefore, DG m ...
pub3241bvariablefrequencydrives
... The rotation speed of an induction motor is fixed and determined by the frequency of the supply voltage. Alternating the current supplied to the stator windings of the motor produces a magnetic field that rotates. Within the winding of the motor are pairs of magnetic poles. Dividing 60 hertz by the ...
... The rotation speed of an induction motor is fixed and determined by the frequency of the supply voltage. Alternating the current supplied to the stator windings of the motor produces a magnetic field that rotates. Within the winding of the motor are pairs of magnetic poles. Dividing 60 hertz by the ...
AMS4155 数据手册DataSheet 下载
... • Thermal Shutdown • Cycle-by-cycle + hiccup Over Current Protection • Under Voltage Lockout • Frequency Synchronization Input • Operating Temperature: -40°C to 125°C • Available in an 8-Pin SO Package ...
... • Thermal Shutdown • Cycle-by-cycle + hiccup Over Current Protection • Under Voltage Lockout • Frequency Synchronization Input • Operating Temperature: -40°C to 125°C • Available in an 8-Pin SO Package ...
Compensation of a PFC Stage Driven by the NCP1654
... © Semiconductor Components Industries, LLC, 2009 ...
... © Semiconductor Components Industries, LLC, 2009 ...
Utility frequency
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power plant to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world.During the development of commercial electric power systems in the late 19th and early 20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one over the other and no apparent desire for complete worldwide standardization.Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency.