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2008-12-29 09:32:42 130 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

如何设计QR反激变换器摘要：本文分析了基于GaN技术的PD适配器市场现状，重点探讨了准谐振反激变换器（QR Flyback）的工作原理及设计方法。文章首先介绍了反激变换器的三种工作模式（CCM、DCM、CRM/QR）及其特点，指出QR模式通过谷底开通技术能显著降低开关损耗。随后以65W适配器为例，详细阐述了变压器参数设计流程，包括匝比确定、原边电感计算和绕组匝数设计等关键步骤。文章强调QR反激变换器凭借高效率、小体积和低成本优势，已成为20W-65W PD适配器的主流拓扑方案，配合GaN技术进一步提升了功率密度和便携性。阅读详情

<asp:GridView ID="GridViewBook" OnPageIndexChanging="GridViewPageExchange" runat="server" AutoGenerateColumns="false" DataKeyNames="ID" OnRowCommand="RowCommandClick" AllowPaging="true" PageSize=5 PagerSettings-Mode="Numeric" >
<Columns>
<asp:TemplateField HeaderText="操作">
<ItemTemplate>
<asp:ImageButton ID="ImageButtonEdit" CommandName="Edit" ImageUrl="~/Image/edit.gif" runat="server" />
<asp:ImageButton ID="ImageButtonDelete" CommandName="Delete" ImageUrl="~/Image/delete.gif" runat="server" />
</ItemTemplate>
</asp:TemplateField>

<asp:BoundField HeaderText="书编号" DataField="BookID"/>
<asp:BoundField HeaderText="书名" DataField="Bookname"/>
<asp:BoundField HeaderText="中文书名" DataField="ChineseName"/>
<asp:BoundField HeaderText="类别" DataField="BookType" />
<asp:BoundField HeaderText="作者" DataField="Author"/>
<asp:BoundField HeaderText="翻译者" DataField="Translator"/>
<asp:BoundField HeaderText="bookconcern" DataField="BookConcern"/>
<asp:BoundField HeaderText="出版日期" DataField="PublishDate"/>
<asp:BoundField HeaderText="版本" DataField="Edition"/>
<asp:BoundField HeaderText="价格" DataField="Price"/>
<asp:BoundField HeaderText="摘要" DataField="Brief"/>
</Columns>
</asp:GridView>

// GridViewRow 删除，修改操作
protected void RowCommandClick(object sender,GridViewCommandEventArgs e)
{
try
{
int rowIndex = ((e.CommandSource as ImageButton).NamingContainer as GridViewRow).RowIndex;

int id = Convert.ToInt32(GridViewBook.DataKeys[rowIndex].Value);

if (e.CommandName == "Edit")
{
Response.Redirect("AddBook.aspx?Mode=Edit&ID=" + id.ToString/////////////把Try Catch 去掉就会出异常：
//////////// 异常详细信息: System.NullReferenceException:
//////////////// 未将对象引用设置到对象的实例

/////////////////////////
/////////////就是这一行
}
else if (e.CommandName == "Delete")
{

}
}
catch
{

}
}

//分页

protected void GridViewPageExchange(object sender, GridViewPageEventArgs e)
{
GridViewBook.PageIndex = e.NewPageIndex;
BindData();
}
}
}

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