How step-motor performance
... (typically 10 times higher or more). They also use current-sensing circuitry and apply pulse-width modulation (PWM) to the supply voltage to maintain ...
... (typically 10 times higher or more). They also use current-sensing circuitry and apply pulse-width modulation (PWM) to the supply voltage to maintain ...
A HIGH PERFORMANCE INDUCTION MOTOR DRIVE SYSTEM
... time constant variations. Basically, the motor drive system comprises a voltage source inverterfed induction motor (VSIM): namely a three-phase voltage source inverter and the induction motor. The squirrel-cage induction motor voltage equations are based on an orthogonal d-q reference-rotating frame ...
... time constant variations. Basically, the motor drive system comprises a voltage source inverterfed induction motor (VSIM): namely a three-phase voltage source inverter and the induction motor. The squirrel-cage induction motor voltage equations are based on an orthogonal d-q reference-rotating frame ...
GAC is the name of a series of bipolar chopper drives, suitable for
... component, easy to use and fit, ensuring optimum performance at competitive costs. The wide range of current/voltage values optimizes the use of applications, with a great variety of stepping motors. ...
... component, easy to use and fit, ensuring optimum performance at competitive costs. The wide range of current/voltage values optimizes the use of applications, with a great variety of stepping motors. ...
95MET-2
... 7. What are the factors on which the speed of a motor depends? Discuss them for series and shunt motors. A shunt motor supplied at 230 V runs at 900 rpm. When the armature current is 30 A, the resistance of the armature circuit is 0.4 , calculate the resistance required in series with the armature ...
... 7. What are the factors on which the speed of a motor depends? Discuss them for series and shunt motors. A shunt motor supplied at 230 V runs at 900 rpm. When the armature current is 30 A, the resistance of the armature circuit is 0.4 , calculate the resistance required in series with the armature ...
AF-300 P11 - GE Industrial Solutions
... spinning motor), automatic energy-saving operation which minimizes drive and motor loss at light load and other functions to combine performance and energy savings. The new generation IGBT means reduced electrical noise and less voltage spiking. On-line-tuning provides a continuous check for variati ...
... spinning motor), automatic energy-saving operation which minimizes drive and motor loss at light load and other functions to combine performance and energy savings. The new generation IGBT means reduced electrical noise and less voltage spiking. On-line-tuning provides a continuous check for variati ...
- Lotus Live Projects
... multilevel inverter fed induction motor drive. The output harmonic content is reduced by using multilevel inverter. In symmetrical circuit, the voltage and power increase with the increase in the number of levels of inverter. The switching angle for the pulse is selected in such way to reduce the ha ...
... multilevel inverter fed induction motor drive. The output harmonic content is reduced by using multilevel inverter. In symmetrical circuit, the voltage and power increase with the increase in the number of levels of inverter. The switching angle for the pulse is selected in such way to reduce the ha ...
Two-Pole Brushless DC Motor with Three
... This is in the reality a permanent-magnet synchronous machine. It is named DC not because of its structure but due to the fact that its operating characteristics resemble those of a shunt DC motor with constant field current. This characteristic can be obtained by providing the motor with a power su ...
... This is in the reality a permanent-magnet synchronous machine. It is named DC not because of its structure but due to the fact that its operating characteristics resemble those of a shunt DC motor with constant field current. This characteristic can be obtained by providing the motor with a power su ...
Electric Motors and Motion Control
... Is this motor big enough? Will this thing move? What gear ratio should I use? How big should my power supply be? How hot will it get? How fast can I machine? What materials can I machine? ...
... Is this motor big enough? Will this thing move? What gear ratio should I use? How big should my power supply be? How hot will it get? How fast can I machine? What materials can I machine? ...
Adjustable Speed Drives
... • The ability of a motor to cool itself effectively is reduced as the motor is slowed down. Over-sizing the motor or providing external forced air ventilation may be required with extended operation at low speeds and high loads. ...
... • The ability of a motor to cool itself effectively is reduced as the motor is slowed down. Over-sizing the motor or providing external forced air ventilation may be required with extended operation at low speeds and high loads. ...
Variable-frequency drive
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.