High Ripple Current Loads
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Considerations when using switchmode power supplies to drive high ripple current loads such as motors and switchmode converters. For applications where there is a large ripple component in the load current (such as DC-AC inverter/DC-DC converter/DC motor loads), there are several unexpected (and undesirable) problems that can occur with source power supplies of the switchmode type. The reason for this is that, unlike linear supplies, the power is delivered to the output storage capacitors in "packets" at a regular rate (switching frequency).