Energy converter and associated door closer

An energy converter for converting mechanical energy to electrically stored energy, the energy converter comprising:

• a generator comprising at least one winding;
• an energy storage device;
• a rectifier provided between the generator and the energy storage device;
• a voltage boost circuit that is selectively activated;
• a control circuit that is configured to:
• determine a charge level in the energy storage device:
• determine a threshold voltage based on the charge level:
• detect that a voltage that is energised by the generator is below the threshold voltage;
• and
• activate the voltage boost circuit of the energy converter to increase a voltage supplied to the energy storage device in response to detecting that the voltage that is energised by the generator is below the threshold voltage.