Explanation of Hysteresis and Eddy Current Losses in a DC Machine

Hysteresis Losses:
- Hysteresis losses occur in the core material of the DC machine due to the reversal of magnetization during each cycle of operation.
- The hysteresis loss is dependent on the magnetic properties of the core material and the frequency of the magnetic reversals.
- In this case, the hysteresis losses in the DC machine running at 1000rpm are measured to be 350 units.

Eddy Current Losses:
- Eddy current losses are caused by circulating currents induced in the core material of the DC machine due to the changing magnetic field.
- These currents circulate within the core material and dissipate energy in the form of heat.
- The eddy current losses are dependent on the conductivity of the core material, the frequency of the magnetic field, and the thickness of the core.
- In this case, the eddy current losses in the DC machine running at 1000rpm are measured to be 100 units.

Total Losses:
- The total losses in the DC machine running at 1000rpm can be calculated by adding the hysteresis losses and eddy current losses together.
- Total losses = Hysteresis losses + Eddy current losses
- Total losses = 350 + 100 = 450 units