## Duty cycle, Mechanical Engineering

Assignment Help:

Duty cycle

The concept of duty cycle is to be clearly understood before operating any machine. Unlike the arc welding power sources, the resistance welding power sources are designated for 1 minute integrating period. Suppose a machine is rated for 50 % duty cycle, it means that after operating the machine for ½ min. at full load, the machine has to be cooled for the next ½ min. The duty cycle at loads different to the full load can be calculated from the formula.

Duty cycle at Y kVA = (rated kVA / Y kVA) x rated KVA

This formula is applicable straight in the case of under loads but while overloading, we should not overlook the constraint imposed by the maximum capacities of the circuit elements e.g. diodes, contacts, etc., though the machine is going to be overloaded to that extent only for a very brief period allowed by this formula. In effect, this formula takes care of the heating of the winding only.

#### Globular transfer, Globular Transfer Globular transfer  is characterise...

Globular Transfer Globular transfer  is characterised by a drop size of greater diameter than that of the electrode wire. The large drop is easily acted on by gravity, generall

#### Relative motion, the jet transport B is flying at the velocity of 600km/h w...

the jet transport B is flying at the velocity of 600km/h when a smaller aircraft A passes underneath the transport headed in the 60 degree direction. To passengers in B, however ap

#### Wilson-Hartnell Governor:, A Wilson-Hartnell governor is illustrated in giv...

A Wilson-Hartnell governor is illustrated in given Figure. In this, the balls are associated by two springs that are known as main springs. The main springs are symmetrically arran

#### Merchant force diagram, Merchant forces diagram with assumption

Merchant forces diagram with assumption

#### Determine the eigen values, Determine the eigen values and eigen vectors of...

Determine the eigen values and eigen vectors of the matrix

#### Governor, where expendable pattern is used?

where expendable pattern is used?

#### Heat dissipation -various factors in clutch design , Heat Dissipation : Du...

Heat Dissipation : During clutch application, large amount of heat is generated. The rubbing surfaces should have sufficient area and mass to absorb the generated heat. The proper

#### Balancing of several masses rotating in different planes, The crank shaft o...

The crank shaft of a high speed pump has a parallel shaft of 2.5 cm diameter and 48 cm in length. It carries three eccentrics each of 6 cm in diameter and uniform thickness of 1.8

#### Casting, defect of casting

defect of casting

#### Determination of wind-induced forces on pressure vessels, Q. Determination ...

Q. Determination of Wind-Induced Forces on Pressure Vessels? ASCE does not provide the complete methodology needed to account for wind-induced forces on common appurtenances to