AN-828 Increasing the High Speed Torque of
... Chopper drives increase the slew rates of the winding currents by applying VCC >> Vrated. Feedback-driven switching of the H-bridges holds the winding currents to the rated limit. Figure 11 shows the chopping states of a single H-bridge of a chopper drive. A low value resistor in the ground lead of ...
... Chopper drives increase the slew rates of the winding currents by applying VCC >> Vrated. Feedback-driven switching of the H-bridges holds the winding currents to the rated limit. Figure 11 shows the chopping states of a single H-bridge of a chopper drive. A low value resistor in the ground lead of ...
Document
... usually self-learning of motor parameters is necessary so as to get accurate motor internal parameters for vector control calculation. Self-learning of motor parameters need know the following plate data: rated power, rated frequency, rated speed, rated voltage, and rated current. The plate of some ...
... usually self-learning of motor parameters is necessary so as to get accurate motor internal parameters for vector control calculation. Self-learning of motor parameters need know the following plate data: rated power, rated frequency, rated speed, rated voltage, and rated current. The plate of some ...
The Perfect Fit
... easily into retrofits and other applications where space is at a premium. Fast & Simple Commissioning The SINAMICS Perfect Harmony GH180 drive offers a simplified system, with enhanced serviceability and reduced commissioning. In some instances commissioning time is as little as 1-2 days! ...
... easily into retrofits and other applications where space is at a premium. Fast & Simple Commissioning The SINAMICS Perfect Harmony GH180 drive offers a simplified system, with enhanced serviceability and reduced commissioning. In some instances commissioning time is as little as 1-2 days! ...
D G 220514
... When a separate motor disconnect switch is provided, the disconnect shall include automatic “early break” auxiliary contacts that deactivate the VFD whenever the motor disconnect switch is opened. The wiring associated with the early break contacts may be run in the same conduit as the power wiring ...
... When a separate motor disconnect switch is provided, the disconnect shall include automatic “early break” auxiliary contacts that deactivate the VFD whenever the motor disconnect switch is opened. The wiring associated with the early break contacts may be run in the same conduit as the power wiring ...
Considering Instantaneous Voltage Drop Versus Sustained Voltage
... • Their maximum KVA values are different. Maximum starting KVA (SKVA) based on a sustained voltage of 90% can show a much larger value, but the voltage dip is almost always much greater than 35%. • Specifications should call for instantaneous voltage dip value for SKVA at a given voltage dip for a ...
... • Their maximum KVA values are different. Maximum starting KVA (SKVA) based on a sustained voltage of 90% can show a much larger value, but the voltage dip is almost always much greater than 35%. • Specifications should call for instantaneous voltage dip value for SKVA at a given voltage dip for a ...
UNIT 16 ELECTRIC MOTORS
... across adjacent wires, inducing a voltage in the adjacent wires. This is called se(finduction, and it produces a voltage in the wire opposite to the applied voltage. This self-induced voltage resists the flow of current. The combined effect of the resistance of the wire and the self-induction is the ...
... across adjacent wires, inducing a voltage in the adjacent wires. This is called se(finduction, and it produces a voltage in the wire opposite to the applied voltage. This self-induced voltage resists the flow of current. The combined effect of the resistance of the wire and the self-induction is the ...
670 X - Hall Effect Sensors
... Connecting Motors from Other Vendors The previous discussion described Compumotor servo motors, and how the OEM670X/675X drive operates them. If you use a motor from another vendor, obtain information from the motor’s manufacturer about its sequence of Hall states, commutation scheme, etc. Use the a ...
... Connecting Motors from Other Vendors The previous discussion described Compumotor servo motors, and how the OEM670X/675X drive operates them. If you use a motor from another vendor, obtain information from the motor’s manufacturer about its sequence of Hall states, commutation scheme, etc. Use the a ...
... When three currents that are sinusoidally varying in time, but displaced in phase by 120° from each other, flow through the three symmetrically-placed windings, a radially-directed air gap flux density is produced that is also sinusoidally distributed around the gap and rotates at an angular velocit ...
hysteresis current control technique for three phase induction motor
... There were several methods that used in the hysteresis controller such as Direct torque control (DTC). Today DTC is recognized as a high performance control method for AC machines, allowing for fast torque control. In addition, DTC is very interesting and attractive from a conceptual point of view, ...
... There were several methods that used in the hysteresis controller such as Direct torque control (DTC). Today DTC is recognized as a high performance control method for AC machines, allowing for fast torque control. In addition, DTC is very interesting and attractive from a conceptual point of view, ...
An evaluation of electric motors for ship propulsion Bassham, Bobby A. 2003-06
... An evaluation was conducted of the various propulsion motors being considered for electric ship propulsion. The benefit of such an evaluation is that all of the propulsion options being considered by the U.S. Navy have been described in one document. The AC induction motor, AC synchronous motor, Hig ...
... An evaluation was conducted of the various propulsion motors being considered for electric ship propulsion. The benefit of such an evaluation is that all of the propulsion options being considered by the U.S. Navy have been described in one document. The AC induction motor, AC synchronous motor, Hig ...
TEXT
... used to fire the weapon. Looking at the timing of the servo pulses from the R/C receiver we have to consider the falling edge of the first channel pulse, this was found to be only micro seconds in front of the rising edge of the second pulse. Using one PIC to control the robot would not have been su ...
... used to fire the weapon. Looking at the timing of the servo pulses from the R/C receiver we have to consider the falling edge of the first channel pulse, this was found to be only micro seconds in front of the rising edge of the second pulse. Using one PIC to control the robot would not have been su ...
Lab 5 Document (Word)
... resistors R5 and R8. This circuit has a dc gain of 5.6 and inverts the output with respect to the input signal. The IC U4 is a non-inverting voltage comparator that acts as the pulse width modulator. The triangle wave enter the device on the inverting input and the control voltage, Vc, enters on the ...
... resistors R5 and R8. This circuit has a dc gain of 5.6 and inverts the output with respect to the input signal. The IC U4 is a non-inverting voltage comparator that acts as the pulse width modulator. The triangle wave enter the device on the inverting input and the control voltage, Vc, enters on the ...
Modeling of Saturation Due to Main and Leakage Flux
... This mutual saturation effect originates mainly from skewed and closed rotor slots [3], which are used in the majority of small machines. A typical main-flux saturation characteristics is sketched in Fig. 1; to model the inductance corresponding to the figure, a function of two variables is needed. ...
... This mutual saturation effect originates mainly from skewed and closed rotor slots [3], which are used in the majority of small machines. A typical main-flux saturation characteristics is sketched in Fig. 1; to model the inductance corresponding to the figure, a function of two variables is needed. ...
datasheet XtraDrive
... Sign + pulse train, 90° phase displacement 2-phase pulse (A-phase+ B-phase) or CCW/CW pulse train Line driver (+5 V level) , open collector (+5 V or +12 level) 0 to 500 Kpps (200 Kpps max. at open collector) Clear signal (input pulse is same as reference pulse) A-phase, B.phase, C-phase, (S-phase): ...
... Sign + pulse train, 90° phase displacement 2-phase pulse (A-phase+ B-phase) or CCW/CW pulse train Line driver (+5 V level) , open collector (+5 V or +12 level) 0 to 500 Kpps (200 Kpps max. at open collector) Clear signal (input pulse is same as reference pulse) A-phase, B.phase, C-phase, (S-phase): ...
500 Series Manual
... service or remove any components!!! If the power disconnect point is out of sight, lock it in disconnected position and tag to prevent unexpected application of power. Only a qualified electrician or service personnel should perform any electrical troubleshooting or maintenance. At no time should ci ...
... service or remove any components!!! If the power disconnect point is out of sight, lock it in disconnected position and tag to prevent unexpected application of power. Only a qualified electrician or service personnel should perform any electrical troubleshooting or maintenance. At no time should ci ...
Troubleshooting Induction Motors
... all U.S. motor manufacturers design. NEMA recommends that a standard motor be capable of starting a 90% of rates voltage, which is assumed to be a typical line drop, but this is not always recognized for RVS. Due to this, it is always important that the true voltage at the motor terminals be given t ...
... all U.S. motor manufacturers design. NEMA recommends that a standard motor be capable of starting a 90% of rates voltage, which is assumed to be a typical line drop, but this is not always recognized for RVS. Due to this, it is always important that the true voltage at the motor terminals be given t ...
Electric motor
An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with traction motors, electric motors can operate in both motoring and generating or braking modes to also produce electrical energy from mechanical energy.Found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives, electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as from the power grid, inverters or generators. Small motors may be found in electric watches. General-purpose motors with highly standardized dimensions and characteristics provide convenient mechanical power for industrial use. The largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, and so on.Electric motors are used to produce linear or rotary force (torque), and should be distinguished from devices such as magnetic solenoids and loudspeakers that convert electricity into motion but do not generate usable mechanical powers, which are respectively referred to as actuators and transducers.