Transient Peak Currents in Permanent Magnet Synchronous Motors
... motors (PMSM) became more and more popular for these applications. The performance of PMSM drives increased significantly in recent years due to the development of rare earth permanent magnet materials, e.g. NdFeB or SmCo. The described traction motor applications require a wide constant-power area. ...
... motors (PMSM) became more and more popular for these applications. The performance of PMSM drives increased significantly in recent years due to the development of rare earth permanent magnet materials, e.g. NdFeB or SmCo. The described traction motor applications require a wide constant-power area. ...
Application Note No. 065 Schottky Diodes for Clipping, Clamping and
... enough, can cause permanent damage to system components such as microprocessors. Long transmission lines connecting different parts of a system are particularly susceptible to noise pickup and are often the major culprits in noise and spike problems. Clipping and Clamping is the deliberate limiting ...
... enough, can cause permanent damage to system components such as microprocessors. Long transmission lines connecting different parts of a system are particularly susceptible to noise pickup and are often the major culprits in noise and spike problems. Clipping and Clamping is the deliberate limiting ...
ipmhvc2016_Li_Jinyu
... equipment reach to maximum and minimum at the same time and the phase offset of these points are either 0° or 180°. This is because that metal materials have a rather small damping on vibration. Incident wave and reflected wave are in superposition and perform a stationary vibration. As to the power ...
... equipment reach to maximum and minimum at the same time and the phase offset of these points are either 0° or 180°. This is because that metal materials have a rather small damping on vibration. Incident wave and reflected wave are in superposition and perform a stationary vibration. As to the power ...
GMR Sensor Catalog
... referred to as a “spin valve” GMR material. This type of material does not necessarily rely on antiferromagnetic coupling of the adjacent magnetic layers in the GMR film. In this case one of the magnetic layers is “pinned,” or fixed with respect to its magnetization direction. The magnetization dire ...
... referred to as a “spin valve” GMR material. This type of material does not necessarily rely on antiferromagnetic coupling of the adjacent magnetic layers in the GMR film. In this case one of the magnetic layers is “pinned,” or fixed with respect to its magnetization direction. The magnetization dire ...
AUTOMOTIVE ELECTRICAL CIRCUITS AND WIRING
... tropical climates. This reading indicates a fully charged battery. When a rundown battery is brought into the shop, you should recharge it immediately. There are several methods for charging batteries; only direct current is used with each method. If only alternating current is available, a rectifie ...
... tropical climates. This reading indicates a fully charged battery. When a rundown battery is brought into the shop, you should recharge it immediately. There are several methods for charging batteries; only direct current is used with each method. If only alternating current is available, a rectifie ...
File
... MEMS tunable inductors (2) A λ/4 transmission line was used to construct the inverter. The inverter has a limited bandwidth and would relatively occupy a large area in low frequency applications. MEMS tunable inductor is proposed using lumped element inverters. advantage : wider bandwidth, mo ...
... MEMS tunable inductors (2) A λ/4 transmission line was used to construct the inverter. The inverter has a limited bandwidth and would relatively occupy a large area in low frequency applications. MEMS tunable inductor is proposed using lumped element inverters. advantage : wider bandwidth, mo ...
Summary
... Since power and ground planes are by definition a planar structure, current does not just flow through them in one direction. It tends to spread out as it travels from one point to another, in accordance with a property similar to skin effect. For this reason, inductance of planes can be described a ...
... Since power and ground planes are by definition a planar structure, current does not just flow through them in one direction. It tends to spread out as it travels from one point to another, in accordance with a property similar to skin effect. For this reason, inductance of planes can be described a ...
Aalborg Universitet Converters
... space vector symmetry, the variation for only one sector is depicted in Fig. 5. The variation of the Icap(rms) with the modulation indices is also depicted in Fig. 6. The line current is assumed to be constant at rated value and the displacement power factor is taken to be one. The variation of the ...
... space vector symmetry, the variation for only one sector is depicted in Fig. 5. The variation of the Icap(rms) with the modulation indices is also depicted in Fig. 6. The line current is assumed to be constant at rated value and the displacement power factor is taken to be one. The variation of the ...
A new design concept of permanent magnet machine for flux
... d-axis current is applied, the permanent magnets will be forced to operate in the irreversible demagnetization region and will never be able to recoil back to its original operation point after the d-axis current is removed. Consequently, the torque capacity of the PM machine is permanently reduced ...
... d-axis current is applied, the permanent magnets will be forced to operate in the irreversible demagnetization region and will never be able to recoil back to its original operation point after the d-axis current is removed. Consequently, the torque capacity of the PM machine is permanently reduced ...
RF current element design for independent control of current
... high frequency. This requires a parallel transmit system with independent control of the amplitude and phase of the rung currents to enable optimization of B1 field homogeneity (3–5). The recent development of the theory of transmit SENSE (5, 6) and the consequent renewal of interest in multidimensio ...
... high frequency. This requires a parallel transmit system with independent control of the amplitude and phase of the rung currents to enable optimization of B1 field homogeneity (3–5). The recent development of the theory of transmit SENSE (5, 6) and the consequent renewal of interest in multidimensio ...
induction-motor-notes
... In case of synchronous motor also, once rotor starts rotating at synchronous speed, the stationary stator (armature) conductors cut the flux produced by rotor. The only difference is conductors are stationary and flux is rotating. Due to this there is an induced e.m.f. in the stator which according ...
... In case of synchronous motor also, once rotor starts rotating at synchronous speed, the stationary stator (armature) conductors cut the flux produced by rotor. The only difference is conductors are stationary and flux is rotating. Due to this there is an induced e.m.f. in the stator which according ...
Three-dimensional Finite Element Computation of Eddy Currents in
... element method. The finite element method has become a standard tool for the solution of electrical machine problems. Various finite element types have been developed. Nodal finite elements are widely used. In recent years, edge finite elements have received increasing attention because of several u ...
... element method. The finite element method has become a standard tool for the solution of electrical machine problems. Various finite element types have been developed. Nodal finite elements are widely used. In recent years, edge finite elements have received increasing attention because of several u ...
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.