| 主权项 |
1. Electrical power supply device for delivering an electrical power supply to a wireless sensor unit, with the power supply device comprising:
a first electrical energy generator configured to recover an ambient energy in the environment of the sensor unit and to produce an electrical energy according to the ambient energy recovered, a second electrical energy generator comprising a battery in order to deliver a backup electrical energy, an electrical storage component comprising a capacitor arranged in such a way as to receive an electrical energy coming from the first generator and/or from the second generator, and to apply a given level of electrical power to the sensor unit, an electrical energy management circuit configured to limit the given level of electrical power between a lower limit and an upper limit, said electrical energy management circuit comprising a unipolar transistor with a conducting channel when its gate-source voltage is zero, with the unipolar transistor being arranged in relation to the first generator, to the second generator, and to the storage circuitry, in such a way that the gate-source voltage depends on a difference between the electrical energy delivered by the second generator and the given level of power supply. |
