Optimal Commutation of a BLDC Motor by Utilizing the Symmetric
... the proposed method and to verify its effectiveness [5]. The position information of a rotor is detected by monitoring the back-emf voltage, and a DSP controls the switching of the inverter circuit and the speed of the motor with the proportional - integral (PI) control. The DSP is TMS320LF2407A b ...
... the proposed method and to verify its effectiveness [5]. The position information of a rotor is detected by monitoring the back-emf voltage, and a DSP controls the switching of the inverter circuit and the speed of the motor with the proportional - integral (PI) control. The DSP is TMS320LF2407A b ...
DC Generators Separate and Shunt Excitation
... You can work individually or with a partner. Groups of three or more are not allowed. Please be aware of the following hazards. (a) Electric motors and generators include parts rotating at high speed (up to 1500 rpm). Care should be taken when operating such machines. Note that power will be supplie ...
... You can work individually or with a partner. Groups of three or more are not allowed. Please be aware of the following hazards. (a) Electric motors and generators include parts rotating at high speed (up to 1500 rpm). Care should be taken when operating such machines. Note that power will be supplie ...
excitation of dc generator
... Separately excited DC generators have many advantages over self-excited DC generators. It can operate in stable condition with any field excitation and gives wide range of output voltage. The main disadvantage of these kinds of generators is that it is very expensive of providing a separate excitati ...
... Separately excited DC generators have many advantages over self-excited DC generators. It can operate in stable condition with any field excitation and gives wide range of output voltage. The main disadvantage of these kinds of generators is that it is very expensive of providing a separate excitati ...
Single phase Transformer
... 4. An isolation transformer has its primary and secondary voltage electrically and mechanically separated. 5. Isolation transformers help filter voltage and current spikes. 6. Polarity dots are often added to schematic diagrams to indicate transformer polarity. ...
... 4. An isolation transformer has its primary and secondary voltage electrically and mechanically separated. 5. Isolation transformers help filter voltage and current spikes. 6. Polarity dots are often added to schematic diagrams to indicate transformer polarity. ...
Document
... which then generates power to drive DC motor. Speed regulation: change voltage of magnetic field for the DC generator to regulate its DC output and further to regulate the operating speed of the DC motor. The process of energy conversion of the system: from AC electric energy to mechanical energy (A ...
... which then generates power to drive DC motor. Speed regulation: change voltage of magnetic field for the DC generator to regulate its DC output and further to regulate the operating speed of the DC motor. The process of energy conversion of the system: from AC electric energy to mechanical energy (A ...
Lecuture-44
... Lecuture-44 Design of stator winding Stator winding is made up of former wound coils of high conductivity copper of diamond shape. These windings must be properly arranged such that the induced emf in all the phases of the coils must have the same magnitude and frequency. These emfs must have same w ...
... Lecuture-44 Design of stator winding Stator winding is made up of former wound coils of high conductivity copper of diamond shape. These windings must be properly arranged such that the induced emf in all the phases of the coils must have the same magnitude and frequency. These emfs must have same w ...
Other types of electromagnetic clutches
... A horseshoe magnet (A-1) has a north and south pole. If a piece of carbon steel contacts both poles, a magnetic circuit is created. In an electromagnetic clutch, the north and south pole is created by a coil shell and a wound coil. In a clutch, (B1) when power is applied, a magnetic field is created ...
... A horseshoe magnet (A-1) has a north and south pole. If a piece of carbon steel contacts both poles, a magnetic circuit is created. In an electromagnetic clutch, the north and south pole is created by a coil shell and a wound coil. In a clutch, (B1) when power is applied, a magnetic field is created ...
Drives MM440
... This section covers ac voltage source, pulse width modulated (PWM) type variable frequency drives for general or high performance constant or variable torque loads as shown on the project drawings or noted in project motor list. ...
... This section covers ac voltage source, pulse width modulated (PWM) type variable frequency drives for general or high performance constant or variable torque loads as shown on the project drawings or noted in project motor list. ...
L.M. Lorilla, T.A. Keim, J.H. Lang, and D.J. Perreault, Foil Field Lundell Alternator with Rotating Power Electronics, 2006 IEEE Power Electronics Specialists Conference , Jeju, Korea, June 2006, pp. 2164-2169.
... field circuitry that enables the use of a foil field winding. The foil winding provides more ampere-turns than a conventional wire winding when fewer turns are used at significantly higher currents. Thus, a higher current through the winding (at a lower winding voltage) is needed to achieve the desi ...
... field circuitry that enables the use of a foil field winding. The foil winding provides more ampere-turns than a conventional wire winding when fewer turns are used at significantly higher currents. Thus, a higher current through the winding (at a lower winding voltage) is needed to achieve the desi ...
Thomas Townsend Brown: British Patent # 300,311 -
... gravitational fields or electric fields according to their causes. Apparently they have no connection one with the other. This fact is substantiated by observations to the effect that electric fields can be shielded and annulled while gravitational fields are nearly perfectly penetrating. This dissi ...
... gravitational fields or electric fields according to their causes. Apparently they have no connection one with the other. This fact is substantiated by observations to the effect that electric fields can be shielded and annulled while gravitational fields are nearly perfectly penetrating. This dissi ...
UNIT-5 Introduction: MEASUREMENT OF SPEDD, ACCLERATION
... (i) D. C. tachometergenerator: This is an accurately made dc. generator with a permanent magnet of horse-shoe type. With rotation of the shaft, a pulsating dc. Voltage proportional to the shaft speed is produced, and measured with the help of a moving coil voltmeter having uniform scale and calibrat ...
... (i) D. C. tachometergenerator: This is an accurately made dc. generator with a permanent magnet of horse-shoe type. With rotation of the shaft, a pulsating dc. Voltage proportional to the shaft speed is produced, and measured with the help of a moving coil voltmeter having uniform scale and calibrat ...
Technical Definitions Abbreviations
... PM - Permanent Magnetic Synchronous Generator A synchronous generator. An electrical field is achieved by permanent electro magnets. These generators are, as a rule, high pole version, i.e 12 to 24 poles, the frequency is 6 - 12 times higher than 2 pole standard generators of the same speed. (Freque ...
... PM - Permanent Magnetic Synchronous Generator A synchronous generator. An electrical field is achieved by permanent electro magnets. These generators are, as a rule, high pole version, i.e 12 to 24 poles, the frequency is 6 - 12 times higher than 2 pole standard generators of the same speed. (Freque ...
STK681-300 - ON Semiconductor
... ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www ...
... ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.