| 摘要 |
To prevent a switching element from being destroyed by a reverse recovery current, a reverse recovery current prevention device (2) comprises a full wave rectifier (21), first and second diodes (D22, D23), a switching element (24), and a switching element control unit (30). The full wave rectifier (21) rectifies a power source voltage (Vac) from an alternating current power source (10) inputted into first and second input terminals (s2, t2). Each of the anode terminals of the first and second diodes (D22, D23) is respectively connected to the first and second input terminals (s2, t2) of the full wave rectifier (21). The switching element (24) opens or shorts an electrical circuit between a negative-side output terminal of the full wave rectifier (21) and each of the cathode terminals (s3, t3) of the first and second diodes (D22, D23). The switching element control unit (30) prohibits the switching element (24) from shorting the circuit between the negative-side output terminal and each of the cathode terminals (s3, t3) in a case where the voltage between the negative-side output terminal and each of the cathode terminals (s3, t3) is at or greater than a threshold. |
