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91. A three-phase D. C. flash butt welder UZ-350 controlling by PLC for welding rims are introduced.

92. It drives all three-phase currents in right direction at all times and is good in dynamic response, but poor in harmonic characteristics owing to the absence of zero state.

93. The primary of a single-phase transformer is connected to one phase of the three-phase system.

94. The main circuit of the velocity regulation system is composed of the transformer, the three-phase bridge controlled circuit and the flat wave reactor.

95. An all-digital vector control system of three-phase induction motor is presented.

96. This paper describes the work done on experimental measurements andmathematical modeling of solid particle concentration distribution in a three-phase gas-lift loop reactor.

97. This paper states a detecting method for defect of three-phase current motor and it also introduces the experimental analysis result and practice utilization condition of this detecting method.

98. The new topology is known to produce balanced voltages even under unbalanced load conditions. Compared to the other three-phase four-wire inverters, its size and weight are smaller.

99. The paper introduces an integrated protection device of three-phase motor controlled by SCM 89C52, which realizes integrated and intelligent controlling of electric motor.

100. Because the bank adopts late-model components, high power density, it has not red-hot phenomena. It is pure resistive load and three-phase current balance.

101. A practical open-loop control system for the three-phase grid inverter was also developed in the work.

102. This paper introduces a kind of electric circuit which mainly consists of a peak detector and a pulse-width discriminator for protecting the three-phase alternating-current supply with loses a phase.

103. The simulation program in this paper has been applied to make digital simulation of several thyristor circuits, a DC-motor system driven by a three-phase full-wave rectifier circuit and an induction-...sentencedict.com

104. A method for determining Hall sensor positions in three-phase multipole BLDC with concentrated winding is introduced and analyzed.

105. In the industrial power distribution system simulated and via RS-485 bus, the prototype realizes the control of general electric equipments, such as the three-phase motor, the fan, and so on.

106. DC power supply cabinet: three-phase silicon-controlled rectifier (SCR), computer digital pulse triggers plate, flat-wave inductor, L, C filter, etc.

107. In this thesis, ac-to-dc and dc-to-ac power converters are proposed to convert the three-phase varying voltage and frequency PMSG power to single-phase source with constant voltage and frequency.

108. This dissertation pointed out some problems in existing harmonics detection used in three-phase unbalanced system by investigating and studying different kinds of harmonics detection methods.

109. These disadvantages could be eliminated in three-phase systems if the energy account based on the integral of the active power of the positive sequence component with the fundamental harmonic.

110. The three-phase capacitor motor is a new energy-saving motor. Compared with the traditional three-phase induction motor, it has greatly enhanced efficiency and power factor.

111. Aiming at the defects of the traditional circuit the method for the digital phase-shifted trigger in three-phase circuit is proposed on the basis of CPLD.

112. This paper introduces the judgement way of homonymous ends of three-phase windings about out of sync motor in cub modal , and analyses its principle .

113. The magnetic flux distribution in the three-phase four-frame shell-type transformer is analyzed and calculated.

114. The high-precision three-phase motor of HB Cutter, is not only high-precision , high-speed, stable-performance, but also capable of producing top-quality drawings.

115. A three-phase induction motor controller was designed according to the demand of the electric vehicle control system.

116. A novel three-phase VSG is built by three-phase autotransformer and IGBT based bidirectional switch, can easily control the types of voltage sags, sag duration, sag depth and sag phase.

117. In this paper , principle of design and study of three-phase induction motor power measuring device is discussed in theory and practice.

118. The work modes of three-phase AC/DC converter with high frequency transformer based on AC/AC matrix converter are proposed in this paper.

119. The centrifugal immersion method used for the determination of solid-water-air three-phase wet contact angle of particles is presented.

120. In accordance with superposition theorem and substitution theorem, the symmetric three-phase and asymmetric three-phase arc furnace electric power system is reduced as a one phase system.