dell INSPIRON 2650 battery

Compressor impeller design meridian plane shape as shown in Figure 1.

) flow channel design features. Impeller Inlet Section of smaller radius of curvature of the type line, dell laptop battery,,and zero angle of the design, so as to better adapt to low-flow fuel cell operating battery conditions. Adopt a more narrow leaves, Inspiron 1000,to meet the needs of small low-speed flow has high pressure ratio requirements. Because of low specific speed characteristics, when appropriate in the design of the impeller outlet width widened in order to reduce the relative speed of the impeller, thereby reducing the layered effect.

) short without battery Vaneless Diffuser Design. Centrifugal Compressor Diffuser necessary to the impeller exit as much as possible of the kinetic energy into static pressure can be. Centrifugal compressor for the car, and often adopts Vaneless Diffuser, Inspiron 1000, Inspiron 2200, 312-0292
INSPIRON 2600, INSPIRON 2650,its internal fluid flow approximation logarithmic curve. For low specific speed centrifugal compressor impeller, the impeller exit of the tangential velocity u high, but the relative speed of air flow w and the radial velocity along the blade is relatively low, leading to its absolute speed c of the radial direction and great angle α shown in Figure 2. Fluid in the absence of Vaneless Diffuser paragraph to the flow of weeks long, sharp increase in battery friction loss, and vulnerable to the phenomenon have returned. In order to reduce or even avoid such losses, improve the efficiency of gas pressure, using a relatively short period of no Vaneless Diffuser.

) scroll design features. Exports because of the air in the impeller radial velocity is very smal and little traffic, so the design of low battery specific speed centrifugal compressor using a smaller diameter spiral case.

Mobile phone battery explosion-proof variable hand grenades Raiders (1) Inspiron 1000,

Mobile phone battery explosion:

Why mobile phone batteries can explode? The most fundamental reason is that consumers do not use the security of fake and shoddy battery. Battery is a certain danger of chemical industrial products, if they are over-voltage, over-charge batteries, etc. will be fever, does not meet the safety standards of the battery product is likely to cause combustion, explosion. The fake batteries usually cheap, failed to meet the national standard batteries and materials, and some even failed to protect the circuit board or the protection circuit or aging, is more use of recycling used batteries to do raw materials for production dangerous self-evident.

Experts in the safe use of mobile phones ideas:

A manufacturer who told this writer, the battery of security risks exist not only mobile phones. At present,Inspiron 1000, Inspiron 2200, 312-0292
INSPIRON 2600, INSPIRON 2650, a variety of battery has become the modernization of the basic equipment, mobile phones, notebook computers,Inspiron 2200, all kinds of portable devices can not be separated from the battery, if we adopt the low-quality batteries or used improperly, these batteries may have happened the explosion.

Currently used by mobile phone batteries for lithium battery, battery explosion generally has three.

First, the reasons for the battery itself. As a result of internal defects in the battery, the battery does not recharge itself, does not discharge the case of the explosion.

Second, rechargeable batteries have a long-term. Lithium batteries in a special temperature, humidity and bad situation or the environment may have substantial transient discharge currents, triggering spontaneous combustion or explosion.

Three, short-circuit. The smaller the possibility. In addition, consumers will be mobile phones or inflammable materials on the high temperature side, it may cause an explosion.

312-0292,

11-Feb-2009

AT switching power

Switching power supply that is controlled through the circuit switch to high-speed pass with cut-off Road. The DC into high frequency alternating current to the transformer to transformer, resulting in the required one or more voltage! Huawei to high-frequency alternating current is due to high frequency AC battery transformer in the transformer circuit efficiency is much higher than 50HZ. Therefore, switches can make a small transformer, but the work is not very hot! ! Low cost. If you do not will 50HZ into high-frequency switching power supply that does not make sense! !Inspiron 1000, Inspiron 2200, 312-0292
INSPIRON 2600, INSPIRON 2650, Switch transformer nor mysterious. Is an ordinary transformer! This is the switching power supply. Switching power supply can be roughly divided into two kinds of isolation and non-segregation, isolation-type transformers must have switches, rather than isolation may not necessarily have.

In short, switching power supply of the working principle is:

1. AC power input into DC by the rectifier filter;

2. The adoption of high-frequency PWM (pulse width modulation) signal control switch tube, the DC will be added to switch on the transformer primary;

3. Switch the high frequency induction transformer secondary voltage,INSPIRON 2600, the load supply via rectifier filter;

4. Output in part through a circuit back to the control circuit to control the PWM duty cycle to achieve a stable output purposes.

AC power input when the general has to go through one Eritrean asthenosphere things, filtering down-line interference, but also filter out the interference power on the grid;

Power is the same, the higher the switching frequency, switching transformer size smaller, but switch the request of the higher;

Switch transformer secondary windings can have more than one or a multiple tap winding has to be the required output;

General should also be some additional protection circuit,Inspiron 1000, Inspiron 2200, 312-0292
INSPIRON 2600, INSPIRON 2650, such as no-load, short circuit protection, etc., or may be burned down switching power supply.

Say the above is the approximate switching power supply works.

In fact, now have a very high integration ASIC can make a very simple external circuit, INSPIRON 2650,and even free to do debugging.

The development of computer switching power supply, after AT, ATX, ATX12V three stages of development. AT standard introduced by IBM earlier PC / AT machines proposed to provide +5 V,-5V, +12 V,-12V voltage four groups, with hard switching. ATX standards have epoch-making significance, realize the soft boot shutdown, Wake on LAN via remote, an increase of +3. 3V, +5 VSB output. ATX12V is the development of CPU and other hardware products, mainly an increase of +12 V output capacity