louis vuitton outlet Dash8 diesel locomotive fan m

2n2sale160ad

Dash8 diesel locomotive frequency control circuit of fan motor

0 machine type (1) Calculate the value of the harmonic calculation speed 44lI 59.457.154.654. i5031.1292I24 · 620.820 * 36O0-type (I) calculated value of 338.3 calculated harmonic color 1V 42.640 .939. I3935. B boat. 320.917.614.914.5430r equation (1) Calculate the value of the 23.74 frequency conversion, frequency control circuit that is level-style. Its frequency change or conversion in two ways. The first is an external way, that is not the frequency conversion circuit itself, but the auxiliary diesel engine speed changes caused by changes in the frequency of the alternator, power supply fan motor so that the frequency change. When the engine is variable speed, due to the speed of frequency change caused by the change apparently is not level, the wind does not work out the mechanical and electrical power unit configuration problem. When the engine speed held fast to a level, taking into account higher speed series diesel engine speed changes greater inertia will not be mutated, so the frequency changes only slightly faster, the wind mechanical and electrical work will not appear unit problem. The second is an internal way, that is, the ratio of variable frequency inverter circuit itself changes. This change is mutated, the change is also multiplied, so the improper handling can cause problems. When the increase in frequency (on the switch on page 34) 3t Railway Locomotive 1993 l balance toward the motor instructions. At this time the direction of remanent voltage condition when the original anti-traction electric potential in the opposite direction, when the circuit is in idle-line or forward the reverse, the voltage reaches a certain value it is possible to make PN junction rectifier tube was completely offset by self-built electric field, so that rectifier tube resistance sharply increased across the forward current emergency Wei, to some extent in the loop current, current direction shown in solid lines in Figure 2. The results further lead to an increase on the value, loop current is increasing until it reaches the allowed level. Traction motor caused the fire ring. If the rectifier tube at this time can not overcome the self-built electric field PN junction may also be the case in Figure 3 show celebration to 2D, 3D as an example. When F> F, the path will be generated in the solid line in Figure 3 the direction of the current, this current is generated in 3D touch the field winding through its residual magnetism in the same direction, increasing the 3D main pole flux. To F. Increases, while the current in the 2D field winding its remanent magnetic flux generated in the opposite direction, so that two main pole flux weakening, such as decreases, and its results will lead to Ea and Ez further increase the difference between Min, loop further increase the current until the remanence offset 2D, and then change the direction of magnetic flux, causing Z ten F. The circuit power supply, loop current will eventually lead to a large ring bark 2 traction motor preventive measures we can see from the above analysis, causing six traction motors because the ring of fire control loop line 375 and 376 normally open interlock asked for zc closed and the rod screws loose shunting locomotive with Taiwan when the crew is not enough understanding or shunting heavy vehicle is not off-line 2 and is in reverse as you move forward. The fundamental case in the ZC normally open interlock on the interlock, and the practice has proven unreliable work of such interlocking, so recommendations for structural improvements. Currently, to prevent the occurrence of such failure of existing locomotives, can be appropriate for improving the existing locomotive circuit shown in Figure 4. As long as the 375 and 376 between Route 4 Zc normally open interlock a pair of resistance after the brake interlock series. After using this circuit in a locomotive traction conditions, even when the normally open interlock ZG closed, closed 2 also does not cause lc ~ 6c coil is energized, connected to traction motor circuit and cause no change to; resistance in the locomotives in the system start condition, the electrical action sequence unchanged. After such a simple circuit modifications will not result in any adverse consequences,[link widoczny dla zalogowanych], and in the locomotive can be led to avoid this Lou Motor Head l ring fire occurred. (Continued from 32 thistle), the amount will be blocked thyristor trigger pulse,[link widoczny dla zalogowanych], so that J Sapporo machine motor off a few seconds (usually 2 ~ 3s), so that power L remanence, ie,[link widoczny dla zalogowanych], re-Ha has the potential power consumption. Purpose is to prevent pick-voltage electric motor may pull out the phase back EMF 180. Causing tremendous impact caused by the current stack. When the amount of rate reduction, they must cut out some time to turn compliance fan motor speed down to low frequencies after the corresponding Ran power. Appears to prevent a strong electric fan motor brake, mechanical and electrical units Zaocheng wind damage. Through the above analysis,[link widoczny dla zalogowanych], theoretically proved Dash8 diesel locomotive of the fan motor frequency control circuit is feasible. Although it is not as good as the inverter frequency conversion circuit, superior performance, but its simple and reliable, even if broken, can direct a fan motor auxiliary alternator power supply, does not make motorcycles not work. This circuit is very suitable for frequency conversion table in the style of machine speed on the use of diesel locomotives, railway locomotive manufacturing sector should be the new design in China on the use of diesel

相关的主题文章：

gdfgd Online car auxiliary circuit SS3B heavy grou

ugg boots Günstig Motorcycle safety improvement p

ugg boots Lectures on Multimodal Transport (15) Ar