DC Motors Introduction D.C. motors are seldom used in ordinary
... (i) When the motor is running on no load, small torque is required to overcome the friction and windage losses. Therefore, the armature current Ia is small and the back e.m.f. Is nearly equal to the applied voltage. (ii) If the motor is suddenly loaded, the firest effect is to cause the armature to ...
... (i) When the motor is running on no load, small torque is required to overcome the friction and windage losses. Therefore, the armature current Ia is small and the back e.m.f. Is nearly equal to the applied voltage. (ii) If the motor is suddenly loaded, the firest effect is to cause the armature to ...
Sensorless six-step BLDC commutation
... Now it is also a well-known fact that, if an electric current flows through a coil of wire in the presence of a permanent magnet, a force will be produced (mutually on both the wire and the magnet) which is proportional to the strength of the magnet and the amount of current flowing (Amps) in the co ...
... Now it is also a well-known fact that, if an electric current flows through a coil of wire in the presence of a permanent magnet, a force will be produced (mutually on both the wire and the magnet) which is proportional to the strength of the magnet and the amount of current flowing (Amps) in the co ...
Infineon - Article - Surge current pulse generator
... after reaching the peak of the reverse recovery current can be clearly recognized. Additionally, the bigger generated voltage overshoot of the Crowbar diodes in relation to the blocking diodes can be seen. The high softness factor of the blocking diodes D2601NH90T is reached by an ion implantation. ...
... after reaching the peak of the reverse recovery current can be clearly recognized. Additionally, the bigger generated voltage overshoot of the Crowbar diodes in relation to the blocking diodes can be seen. The high softness factor of the blocking diodes D2601NH90T is reached by an ion implantation. ...
The Transformer Principle
... heating of the core. They represent a loss in the transformer and are referred to as iron losses. The iron core is made up of steel laminations, to reduce eddy currents to a minimum. Silicon steel is generally used as its magnetism is easily reversed. ...
... heating of the core. They represent a loss in the transformer and are referred to as iron losses. The iron core is made up of steel laminations, to reduce eddy currents to a minimum. Silicon steel is generally used as its magnetism is easily reversed. ...
ECE320 Chapter 6
... Figure 14 shows the developed torque, current, and power factor of an induction machine over a speed range from below zero (slip > 1 or braking region) to above synchronous (slip < 0 or generator region). There are three regions of interest: 1. For speeds in the range 0 ≤ ωo ≤ ωs the torque is of th ...
... Figure 14 shows the developed torque, current, and power factor of an induction machine over a speed range from below zero (slip > 1 or braking region) to above synchronous (slip < 0 or generator region). There are three regions of interest: 1. For speeds in the range 0 ≤ ωo ≤ ωs the torque is of th ...
1 - CLASSE Cornell
... Figure 1. (a) –A plan view of the injection into the storage ring. (b)–An elevation drawing showing the inflector end where the beam enters the edge of the storage region, along with the beam vacuum chamber and the magnet pole pieces. Equilibrium orbit radius is 7.112 m [1]. During E821 kicker devel ...
... Figure 1. (a) –A plan view of the injection into the storage ring. (b)–An elevation drawing showing the inflector end where the beam enters the edge of the storage region, along with the beam vacuum chamber and the magnet pole pieces. Equilibrium orbit radius is 7.112 m [1]. During E821 kicker devel ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... necessarily involves the weakening of the flux, resulting in the reduction of torque for the same torque producing component of the stator current. By coordinating the torque level for each operating speed, the power output is maintained constant in the flux weakening region. It existed to its direc ...
... necessarily involves the weakening of the flux, resulting in the reduction of torque for the same torque producing component of the stator current. By coordinating the torque level for each operating speed, the power output is maintained constant in the flux weakening region. It existed to its direc ...
pptx
... » Inductor current will reach zero before the end of the full duty cycle – Each mode has its advantages and disadvantages depending on the switching converters. » In generally it’s how they change the frequency response. Figure from Wikipedia ...
... » Inductor current will reach zero before the end of the full duty cycle – Each mode has its advantages and disadvantages depending on the switching converters. » In generally it’s how they change the frequency response. Figure from Wikipedia ...
UNIT 5 Ignition Systems
... housing. You should not measure a difference greater than 1.0 volt. This voltage difference is the voltage drop across the circuit. 3. If the drop is greater than 1.0 volt, attach the negative lead to the ignition ...
... housing. You should not measure a difference greater than 1.0 volt. This voltage difference is the voltage drop across the circuit. 3. If the drop is greater than 1.0 volt, attach the negative lead to the ignition ...
a comparison of surface mount aluminum
... vertical aluminum electrolytics, the horizontal aluminum electrolytic capacitors cannot be used as a drop-in replacement for tantalums. Secondly, to mount horizontal electrolytics , the lead location for these parts is not located along the length of the body but is located along the width and at on ...
... vertical aluminum electrolytics, the horizontal aluminum electrolytic capacitors cannot be used as a drop-in replacement for tantalums. Secondly, to mount horizontal electrolytics , the lead location for these parts is not located along the length of the body but is located along the width and at on ...
- Pcpolytechnic
... which is slightly less than the synchronous speed. As shown in fig.(1), the rotor consists of copper or aluminium bars which are permanently short circuited at both the ends using the conducting rings called end rings. ...
... which is slightly less than the synchronous speed. As shown in fig.(1), the rotor consists of copper or aluminium bars which are permanently short circuited at both the ends using the conducting rings called end rings. ...
Conditions for Running the DTC
... Repair Verification Important: An IC circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the 3-way catalytic converter. 1. Install any components or connectors that have been removed or replaced during diagnosis. 2. Perform any adjus ...
... Repair Verification Important: An IC circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the 3-way catalytic converter. 1. Install any components or connectors that have been removed or replaced during diagnosis. 2. Perform any adjus ...
Coilgun
A coilgun (or Gauss rifle, in reference to Carl Friedrich Gauss, who formulated mathematical descriptions of the magnetic effect used by magnetic accelerators) is a type of projectile accelerator consisting of one or more coils used as electromagnets in the configuration of a linear motor that accelerate a ferromagnetic or conducting projectile to high velocity. In almost all coilgun configurations, the coils and the gun barrel are arranged on a common axis.Coilguns generally consist of one or more coils arranged along a barrel, so the path of the accelerating projectile lies along the central axis of the coils. The coils are switched on and off in a precisely timed sequence, causing the projectile to be accelerated quickly along the barrel via magnetic forces. Coilguns are distinct from railguns, as the direction of acceleration in a railgun is at right angles to the central axis of the current loop formed by the conducting rails. In addition, railguns usually require the use of sliding contacts to pass a large current through the projectile or sabot but coilguns do not necessarily require sliding contacts. Whilst some simple coilgun concepts can use ferromagnetic projectiles or even permanent magnet projectiles, most designs for high velocities actually incorporate a coupled coil as part of the projectile.