This utility model discloses a
manual testing circuit and device for an IPM driver board. The circuit includes VIN, VCC, GND, G, and A terminals, and UH, VH, WH upper bridge input switch groups, N-segment lower bridge input switch groups, and BR, UH, VH, WH, UL, VL, WL output switch groups, respectively connected to the IPM driver board under test. VIN, VCC, and GND terminals are connected to the UH, VH, WH upper bridge input switch groups and the N-segment lower bridge input switch groups, respectively. G and A terminals are connected to the BR, UH, VH, WH, UL, VL, WL output switch groups, respectively. Using the circuit provided by this utility model, the switching function of the IPM driver board under test can be tested individually. By setting the UH, VH, WH upper bridge switch groups to control the individual power supply of the upper bridge arms of the IPM driver board under test, and by switching the N-segment lower bridge input switch groups to control the individual power supply of each phase of the lower bridge arm,
fault analysis of a single bridge arm can be achieved. This allows for the screening of problematic IPM module driver boards before
assembly, reducing losses caused by overall module test failures.