Dual-voltage power supply circuit and inverter welding machine comprising same
A technology of power supply circuit and power control circuit, which is applied in circuit devices, arc welding equipment, emergency power supply arrangement, etc. The effect of reducing failure and reducing impact
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[0042] In order to fully understand the technical content of the present invention, the technical solution of the present invention will be further introduced and illustrated below in conjunction with specific embodiments and accompanying drawings, but is not limited thereto.
[0043] like figure 1 and figure 2 As shown, the dual-voltage power supply circuit of the present invention includes a power supply input terminal 51 and a power supply output terminal 52, a rectifier circuit 61 and a voltage doubler circuit 62 are connected in series between the power supply input terminal 51 and the power supply output terminal 52, and also includes a power supply input terminal 51 connected control transformer 71, and the power control circuit 72 and voltage detection circuit 73 connected with the control transformer 71; the power control circuit 72 includes the first relay 721 located between the power input terminal 51 and the control transformer 71, and located at The second rela...
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