Wireless charging rectifier circuit, wireless charging device and ventricular assist device

1 . A wireless charging rectifier circuit, comprising a first filter circuit, a bridge rectifier circuit, and a second filter circuit connected in sequence,

wherein each of four bridge arms of the bridge rectifier circuit is respectively connected to a first diode and at least one second diode which are connected to each other in parallel, and the at least one second diode is configured to perform rectification when the parallel first diode fails,

wherein a turn-on voltage drop of each of the first diodes is smaller than a turn-on voltage drop of each of the at least one second diodes; and

when the wireless charging rectifier circuit operates normally, the first diode on each of the four bridge arms in the bridge rectifier circuit is turned on to form a rectifier circuit to perform the rectification; and when a first target diode fails, a second target diode is turned on to form the rectifier circuit to perform the rectification, the first target diode is the first diode on one of the four bridge arms, and the second target diode is one of the at least one second diode connected in parallel with the first target diode,

wherein the first filter circuit comprises a plurality of first capacitors in parallel and a plurality of second capacitors in parallel; and

one terminal of the plurality of first capacitors in parallel is connected to a first input terminal of the first filter circuit and one terminal of the plurality of second capacitors in parallel respectively, the other terminal of the plurality of first capacitors in parallel is connected to a second input terminal of the first filter circuit and a second output terminal of the first filter circuit respectively, and the other terminal of the plurality of second capacitors in parallel is connected to a first output terminal of the first filter circuit, and

wherein the second filter circuit comprises a third capacitor, a plurality of fourth capacitors in parallel, a third diode, and a plurality of fifth capacitors in parallel; and

one terminal of the third capacitor is connected to a first input terminal of the second filter circuit, one terminal of each of the plurality of fourth capacitors in parallel, an anode of the third diode, one terminal of each of the plurality of fifth capacitors in parallel, and a first output terminal of the second filter circuit respectively; the other terminal of the third capacitor is connected to a second input terminal of the second filter circuit, the other terminal of each of the plurality of fourth capacitors in parallel, a cathode of the third diode, the other terminal of each of the plurality of fifth capacitors in parallel, and a second output terminal of the second filter circuit.

2 . The wireless charging rectifier circuit according to claim 1 , wherein one of the plurality of first capacitors is a filter capacitor.

3 . The wireless charging rectifier circuit according to claim 1 , wherein a capacitance of one of the plurality of first capacitors is smaller than a capacitance of one of the plurality of second capacitors.

4 . The wireless charging rectifier circuit according to claim 1 , wherein capacitances of the plurality of first capacitors are different.

5 . The wireless charging rectifier circuit according to claim 1 , wherein when one of the plurality of first capacitors is damaged, the remaining first capacitors of the plurality of first capacitors are configured to perform filtering of the first filter circuit.

6 . The wireless charging rectifier circuit according to claim 1 , wherein a capacitance of one of the plurality of fourth capacitors is smaller than a capacitance of the third capacitor and smaller than a capacitance of one of the plurality of fifth capacitors.

7 . The wireless charging rectifier circuit according to claim 1 , wherein when at least one of the third capacitor and the third diode fails, one of the plurality of fourth capacitors and one of the plurality of fifth capacitors are configured to perform filtering of the second filter circuit.

8 . The wireless charging rectifier circuit according to claim 1 , wherein the third diode is a Zener diode.

9 . The wireless charging rectifier circuit according to claim 1 , wherein each of the first diodes, each of the at least one second diodes, the third diode, each of the plurality of first capacitors, each of the plurality of second capacitors, the third capacitor, each of the plurality of fourth capacitors and each of the plurality of fifth capacitors are surface mount devices.

10 . The wireless charging rectifier circuit according to claim 1 , wherein each of the first diodes is an ideal diode.

11 . The wireless charging rectifier circuit according to claim 1 , wherein each of the at least one second diodes is a Schottky diode.

12 . A wireless charging device, comprising the wireless charging rectifier circuit of claim 1 .

13 . A ventricular assist device, comprising the wireless charging device of claim 12 .