Electronic apparatus and control method for electronic apparatus

A control method for an electronic apparatus including a power generator for performing power generation by converting first energy into second energy which is electrical energy;

• a first power supply for accumulating the electrical energy obtained by the power generation;
• a power supply voltage converter for converting the voltage of the electrical energy supplied from said first power supply by a voltage-conversion multiplying factor M (M is a positive real number);
• a second power supply, to which the electrical energy accumulated in said first power supply is transferred through said power supply voltage converter, for accumulating the transferred electrical energy;
• and a driven unit driven by the electrical energy supplied from said first power supply or said second power supply;
• said control method characterized by comprising:
• a non-voltage-converting transfer control step of transferring, in the transition from a state in which the electrical energy is being transferred from said first power supply to said second power supply through said power supply voltage converter by a voltage-conversion multiplying factor M′ (M′ is a positive real number except for one) to a state in which said first power supply and said second power supply are electrically directly coupled, the electrical energy from said first power supply to said second power supply through said power supply voltage converter by the voltage-conversion multiplying factor M=1 in a non-voltage-converting state, wherein a potential difference between said first power supply and said second power supply is less than a predetermined potential difference.

An electronic apparatus comprising:

• a primary power supply;
• a rechargeable auxiliary power supply;
• a configurable switch network having a plurality of capacitors, said capacitors being configurable by said switch network to be all in series, all in parallel, or in a plurality of series connected sub-networks of single capacitor and parallel connected capacitors;
• and
• a configuration control circuit for alternatingly placing said configurable switch network in one of a charge-accumulation phase and a charge-transfer phase, said configurable switch network being coupled to said primary power supply and being electrically decoupled from said rechargeable auxiliary power supply during said charge-accumulation phase, said configurable switch network being effective for storing charge from said main power supply into at least one of said plurality of capacitors during said charge-accumulation phase and being effective for transferring charge to said rechargeable auxiliary power supply during said charge-transfer phase;
• the configuration of said plurality of capacitors being selectively different during said charge-accumulation phase than the configuration during said charge-transfer phase as determined by said configuration control circuit to apply a voltage to said rechargeable auxiliary power supply that is selectively greater than, smaller than, or equal to the voltage of said primary power supply.