simulink model of adapative fuzzy pid controller
... The block diagram of proposed system is shown in fig.2,consists of BLDC motor, three phase voltage source inverter, speed controller, commutation logic and position sensor. BLDC motor is fed by a three phase MOSFET based inverter. The PWM gating signals for firing the power semiconductor devices in ...
... The block diagram of proposed system is shown in fig.2,consists of BLDC motor, three phase voltage source inverter, speed controller, commutation logic and position sensor. BLDC motor is fed by a three phase MOSFET based inverter. The PWM gating signals for firing the power semiconductor devices in ...
Applications of Power Electronics in Automotive Power
... simplified model leading to equation [1] formally only holds when the field decay process is sufficiently slow that rotor eddy currents are not important. A practical consideration that is not widely appreciated is the effect of rotor eddy currents on the duration of the load dump transient. If, for ...
... simplified model leading to equation [1] formally only holds when the field decay process is sufficiently slow that rotor eddy currents are not important. A practical consideration that is not widely appreciated is the effect of rotor eddy currents on the duration of the load dump transient. If, for ...
A New Technology for High Current, Low Insertion Force, Low
... connector housing, minimizing the connector size. Minimizing power loss is critical for supporting the Green initiatives that work to combat adverse human impact on the earth. The energy used, which is ultimately burned up as connector heat, is wasted energy. Low insertion force is also highly impor ...
... connector housing, minimizing the connector size. Minimizing power loss is critical for supporting the Green initiatives that work to combat adverse human impact on the earth. The energy used, which is ultimately burned up as connector heat, is wasted energy. Low insertion force is also highly impor ...
Replacing single-phase ACIMs with three
... Three-phase ACIMs are the work horse of the industry. Low maintenance, inexpensive design, variable-speed capability, and relatively high efficiency make the three-phase induction motor (IM) an ideal candidate for process automation. Three-phase IMs are cost-effective in high power applications at c ...
... Three-phase ACIMs are the work horse of the industry. Low maintenance, inexpensive design, variable-speed capability, and relatively high efficiency make the three-phase induction motor (IM) an ideal candidate for process automation. Three-phase IMs are cost-effective in high power applications at c ...
0. introduction
... does not increase to a value that causes permanent injury to the motor. For d.c. motors of less than 37.3 W, the problem of determining the output rating of a particular motor is complicated by the common practice of using these types of motors at several different voltages and loads; the exact volt ...
... does not increase to a value that causes permanent injury to the motor. For d.c. motors of less than 37.3 W, the problem of determining the output rating of a particular motor is complicated by the common practice of using these types of motors at several different voltages and loads; the exact volt ...
A Novel Approach of Position Estimation, Fuzzy based PFC
... user for a given amount of power use. In so doing, they incur more line losses. They also must have larger capacity equipment in place than would be otherwise necessary. As a result, an industrial facility will be charged a penalty if its power factor is much different ...
... user for a given amount of power use. In so doing, they incur more line losses. They also must have larger capacity equipment in place than would be otherwise necessary. As a result, an industrial facility will be charged a penalty if its power factor is much different ...
outdoor air intakes - HVAC Design Resources
... standard horsepower ratings. Typically, two values are provided by the supplier: "minimum circuit amps" (MCA), which defines the circuit loading for wire sizing purposes, and "maximum over current protection" (MOCP) which defines the required overload protection rating. Overload protection: If the m ...
... standard horsepower ratings. Typically, two values are provided by the supplier: "minimum circuit amps" (MCA), which defines the circuit loading for wire sizing purposes, and "maximum over current protection" (MOCP) which defines the required overload protection rating. Overload protection: If the m ...
influence of arrangement and sizes of magnets upon
... influence of the magnet sizes as on induced voltage (EMF) so on cogging torque (CT). Induced voltage and the cogging torque have been calculated in ANSYS/Maxwell program. In more detail contemplated is influence of the magnet size, their positioning and orientation to the CT in two basic rotor types ...
... influence of the magnet sizes as on induced voltage (EMF) so on cogging torque (CT). Induced voltage and the cogging torque have been calculated in ANSYS/Maxwell program. In more detail contemplated is influence of the magnet size, their positioning and orientation to the CT in two basic rotor types ...
dc machines
... One significant advantage of a DC machine is the variety of performance characteristics that can be achieved by interconnecting the field and armature windings in various ways. The field windings can be excited by a DC source which is connected only to the field windings and not connected to the arm ...
... One significant advantage of a DC machine is the variety of performance characteristics that can be achieved by interconnecting the field and armature windings in various ways. The field windings can be excited by a DC source which is connected only to the field windings and not connected to the arm ...
Protection Description
... time-delayed b tripping according to power swing (number of active power swings): v suitable for generators capable of withstanding high electrical and mechanical constraints v to be set as a number of rotations. The 2 types of operation may be used independently or at the same time. ...
... time-delayed b tripping according to power swing (number of active power swings): v suitable for generators capable of withstanding high electrical and mechanical constraints v to be set as a number of rotations. The 2 types of operation may be used independently or at the same time. ...
Performance Optimization of Induction Motors During Voltage
... for direct-online starting. The amount of electromagnetic torque pulsations reflected to the shaft depends on the parameters of the mechanical subsystem [18], [19]. These may cause shocks to the driven equipment, and damages in the mechanical system components, such as couplings and gears, in the lo ...
... for direct-online starting. The amount of electromagnetic torque pulsations reflected to the shaft depends on the parameters of the mechanical subsystem [18], [19]. These may cause shocks to the driven equipment, and damages in the mechanical system components, such as couplings and gears, in the lo ...
Using Artificial Neural Networks to Estimate Rotor Angles
... Abstract—This paper deals with an improved use of phasor measurements. In particular, the paper focuses on the development of a technique for estimation of generator rotor angle and speed, based on phasor measurement units, for transient stability assessment and control in real-time. Two multilayere ...
... Abstract—This paper deals with an improved use of phasor measurements. In particular, the paper focuses on the development of a technique for estimation of generator rotor angle and speed, based on phasor measurement units, for transient stability assessment and control in real-time. Two multilayere ...
Commutator (electric)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.