JPH0330419U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a sectional view showing the basic configuration of an embodiment of this invention, and Figure 2 is a case in which the pulse transformers shown in Figures 1 and 3 are applied to the inverter circuit shown in Figure 7. 7 is a waveform diagram showing the gate current waveform of transistor Q1 in FIG. 7, FIG. 3 is a sectional view showing the basic configuration of another embodiment of this invention, and FIG. A perspective view, FIG. 5 is a plan view of a printed circuit board used in the pulse transformer shown in FIG. 4, FIG. 6 is an explanatory diagram showing its laminated form, and FIG. 7 is an electric circuit showing the basic configuration of an inverter circuit. 8 and 9 are cross-sectional views showing the prior art, respectively.
FIG. 0 is a waveform diagram showing the gate current waveform of transistor Q1 when the pulse transformers shown in FIGS. 8 and 9 are applied to the inverter circuit of FIG. 7. 30, 40... Coil bobbin (magnetic core), 31,
41... Primary winding, 32, 42... Secondary winding, 33, 43... Insulating tape (insulating layer).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a pulse transformer that transmits a high-frequency drive signal to the gate of a power MOSFET, a primary winding and a secondary winding that are alternately laminated layer by layer with insulating layers interposed in the magnetic core. 1. A pulse transformer characterized in that each primary winding and each secondary winding, which are laminated every other layer, are connected in series. (2) A pulse transformer that transmits a high-frequency drive signal to the gate of a power MOSFET is equipped with a primary winding and a secondary winding that are alternately laminated one layer at a time with an insulating layer interposed between the magnetic core, and every other layer is A pulse transformer characterized in that each stacked primary winding and each secondary winding are connected in parallel.