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Aalborg Universitet Adjustable Speed Drives
Aalborg Universitet Adjustable Speed Drives

2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10 Variable speed
2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10 Variable speed

... The effectiveness of additional filters on this type of system depends on the type of impedance between neutral and earth, and therefore cannot be predicted. If a machine has to be installed on an IT system, one solution is to insert an isolation transformer and connect the machine locally on a TN o ...
V - ResearchGate
V - ResearchGate

Lecture 25
Lecture 25

...  It is called “six-step inverter” because of the presence of six “steps” in the line to neutral (phase) voltage waveform ...
Lecture: PWM Techniques - Ohio State ECE
Lecture: PWM Techniques - Ohio State ECE

...  It is called “six-step inverter” because of the presence of six “steps” in the line to neutral (phase) voltage waveform ...
LCR Measurement Primer
LCR Measurement Primer

... Reactance comes in two types, inductive and capacitive. The reactance of an inductive element is L, where L is its inductance and = 2πf (where f = frequency). The reactance of a capacitive element is negative, -1/ C, where C is its capacitance. The negative sign occurs because the impedance of a pur ...
0E7225 REV.qxd - Generator
0E7225 REV.qxd - Generator

LTC3875 - Dual, 2-Phase, Synchronous Controller with Low Value
LTC3875 - Dual, 2-Phase, Synchronous Controller with Low Value

... The LTC®3875 is a dual output current mode synchronous step-down DC/DC controller that drives all N-channel synchronous power MOSFET stages. It employs a unique architecture which enhances the signal-to-noise ratio of the current sense signal, allowing the use of very low DC resistance power inducto ...
MAX6709/MAX6714 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package General Description
MAX6709/MAX6714 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package General Description

modular electric longboard
modular electric longboard

... electric vehicles, not only because they are a green means of transport, but also because they represent our future. At present, there are many different interesting projects that have become successful thanks to the installation of a simple motor, making them very marketable due to characteristics ...
Starting Headlight Test - CTE-Auto
Starting Headlight Test - CTE-Auto

...  A misadjusted or faulty safety switch can keep the engine from cranking  Move the transmission gear shift lever into various positions while trying to start the engine  If the switch allows cranking in the wrong gear, adjust it © Goodheart-Willcox Co., Inc. ...
Voltage management
Voltage management

lecture 080 – latchup and esd
lecture 080 – latchup and esd

... 2.) A bias condition must exist such that both bipolars are turned on long enough for current through the “SCR” to exceed its switching current. 3.) The bias supply and associated circuits must be capable of supplying the current at least equal to the switching current and at least equal to the hold ...
Maxim Design Support Technical Documents Application Notes
Maxim Design Support Technical Documents Application Notes

... occur. The operation of the system can also be managed by two different ways to improve efficiency. The first method is to reduce the inductor current, thus reducing the resistive losses of the inductor and transistor. The second method is to reduce the switching period of the system. Inductor curre ...
Introduction to Power Electronics
Introduction to Power Electronics

Polyphase Systems
Polyphase Systems

... The phase sequence can be determined by the order in which the phasors representing the phase voltages pass through a fixed point on the phasor diagram if the phasors are rotated in a counterclockwise direction. For example, in Fig. 22.9 the phase sequence is ABC. However, since the fixed point can ...
BD95835EFJ
BD95835EFJ

... must be established within the fixed soft start time. As output capacitance, bypass capacitor will be also connected to output load side (CEXT, Figure 23). Please set the over current detection value with regards to these capacitance. Co+CEXT≦ ...
The following article was offered on the
The following article was offered on the

... 9600 rpm. This is a wide span of speeds which speak more to “adequate” than “optimum”. Alternator and Battery An alternator consists of three basic components: rotor stator rectifier. The rotor and stator are windings made up of varnished copper wires; the varnish acts as an insulator. The rectifier ...
Power Electronics - Talking Electronics
Power Electronics - Talking Electronics

... become to the electrical industry. In fact, the present day advancement in technology is largely attributed to the widespread use of semiconductor devices in the commercial and industrial fields. One major field of application of semiconductor devices in the recent years has been to control large bl ...
62-0389—05 - Class 2000 Meter - E-Mon
62-0389—05 - Class 2000 Meter - E-Mon

Class 2000 Installation Manual - E-Mon
Class 2000 Installation Manual - E-Mon

... a. To ensure a safe installation, the Class 2000 meter requires an external switch mechanism, such as a circuit breaker, be installed on the Class 2000 MAINS input wiring. The switch mechanism must be installed in close proximity to the meter and easily reachable for the operator. This device must a ...
CH 3 Circuits
CH 3 Circuits

... third rail, the 120-V lamps are connected five in series (see Fig. 3.6). The motors on railway cars which operate from a 3000-V dc overhead trolley wire are usually connected two in series so that the voltage per motor will be only 1500 V (see Fig. 3.7). ...
Introduction to Power Electronics
Introduction to Power Electronics

Operating experience with a generator stator end
Operating experience with a generator stator end

Using Monolithic High Voltage Gate Drivers
Using Monolithic High Voltage Gate Drivers

< 1 ... 16 17 18 19 20 21 22 23 24 ... 489 >

Stepper motor



A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed.Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.
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