°ç»„ä¿�留的标签 余下为需è¦�删除的标签
                unset($oldtag[$key]);
            }
        }
    }
    

    if (!empty($oldtag)) {
        $tagids = array();
        foreach ($oldtag as $tagid => $tagname) {
            $tagids[] = $tagid;
        }

        well_oldtag_delete($tagids, $tid);
    }

    $r = well_tag_process($tid, $fid, $create_tag, $tagarr);

    

    return $r;
}

// 删除标签和绑定的主题
function well_oldtag_delete($tagids, $tid)
{
    

    $pagesize = count($tagids);
    $arrlist = well_tag_find_by_tagids($tagids, 1, $pagesize);

    

    $delete_tagids = array(); // 删除
    $tagids = array();
    $n = 0;
    foreach ($arrlist as $val) {
        ++$n;
        
        if (1 == $val['count']) {
            // �有一个主题
            $delete_tagids[] = $val['tagid'];
            
        } else {
            $tagids[] = $val['tagid'];
        }
        
    }

    

    !empty($delete_tagids) and well_tag_delete($delete_tagids);

    $arlist = well_tag_thread_find_by_tid($tid, 1, $n);
    if ($arlist) {
        $ids = array();
        foreach ($arlist as $val) $ids[] = $val['id'];

        well_tag_thread_delete($ids);
    }

    !empty($tagids) and well_tag_update($tagids, array('count-' => 1));

    
}

// 标签数�处� $arr=新�交的数组 $tagarr=�留的旧标签
function well_tag_process($tid, $fid, $new_tags = array(), $tagarr = array())
{
    if (empty($tid)) return '';

    

    // 新标签处�入库
    if ($new_tags) {

        

        $threadarr = array();
        $tagids = array();
        $i = 0;
        $size = 5;
        $n = count($tagarr);
        $n = $n > $size ? $size : $size - $n;

        

        foreach ($new_tags as $name) {
            ++$i;
            $name = trim($name);
            $name = stripslashes($name);
            $name = strip_tags($name);
            $name = str_replace(array('&nbsp;', '#', "@", "$", "%", "^", '&', '·', '<', '>', '；', '`', '~', '!', '￥', '……', ';', '?', '？', '-', '—', '_', '=', '+', '.', '{', '}', '|', ':', '：', '�', '/', '。', '[', ']', '�', '】', '‘', '	', '    ', '  ', '   ', '    '), '', $name);
            $name = htmlspecialchars($name, ENT_QUOTES);
            if ($name && $i <= $n) {
                
                // 查询标签
                $read = well_tag_read_name($name);
                
                if ($read) {
                    // 存在 count+1
                    $tagids[] = $read['tagid'];
                    
                } else {
                    // 入库
                    $arr = array('name' => $name, 'count' => 1);
                    
                    $tagid = well_tag_create($arr);
                    FALSE === $tagid and message(-1, lang('create_failed'));
                    $read = array('tagid' => $tagid, 'name' => $name);
                    
                }

                $tag_thread = array('tagid' => $read['tagid'], 'tid' => $tid);

                

                $threadarr[] = $tag_thread;

                

                $tagarr[$read['tagid']] = $read['name'];
            }
        }

        

        !empty($threadarr) and tag_thread_big_insert($threadarr);

        !empty($tagids) and well_tag_update($tagids, array('count+' => 1));
    }

    

    $json = empty($tagarr) ? '' : xn_json_encode($tagarr);

    

    return $json;
}




?>   $v = implode(",", $v);
        $temp[] = $v;
    }
    // 去掉��的字符串,也就是��的一维数组
    $temp = array_unique($temp);
    // �将拆开的数组�新组装
    $output = array();
    foreach ($temp as $k => $v) {
        if ($stkeep) $k = $starr[$k];
        if ($ndformat) {
            $temparr = explode(",", $v);
            foreach ($temparr as $ndkey => $ndval) $output[$k][$ndarr[$ndkey]] = $ndval;
        } else $output[$k] = explode(",", $v);
    }
    return $output;
}

// �并二维数组 如�� 值以第一个数组值为准
function array2_merge($array1, $array2, $key = '')
{
    if (empty($array1) || empty($array2)) return NULL;
    $arr = array();
    foreach ($array1 as $k => $v) {
        isset($v[$key]) ? $arr[$v[$key]] = array_merge($v, $array2[$k]) : $arr[] = array_merge($v, $array2[$k]);
    }
    return $arr;
}

/*
 * 对二维数组排� 两个数组必须有一个相�的键值
 * $array1 需�排�数组
 * $array2 按照该数组key排�
 * */
function array2_sort_key($array1, $array2, $key = '')
{
    if (empty($array1) || empty($array2)) return NULL;
    $arr = array();
    foreach ($array2 as $k => $v) {
        if (isset($v[$key]) && $v[$key] == $array1[$v[$key]][$key]) {
            $arr[$v[$key]] = $array1[$v[$key]];
        } else {
            $arr[] = $v;
        }
    }

    return $arr;
}




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<a href="/xitong">系统教程</a><a href="/xitong/1700764635a1360.html" title="首页">风扇控速原�</a></div></div></div><div class="fzithome-com main container-w cl"><div class="fzithome-com mainl"><div class="fzithome-com art-post"><div class="fzithome-com title"><h1>风扇控速原�</h1><div class="fzithome-com info"><span><a href="/xitong"><i class="iconfont icon-crossborder-fill"></i>系统教程</a></span><span><i class="iconfont icon-browse"></i>421</span><span><i class="iconfont icon-message-fill"></i>0</span><span>
                        更新时间：2026-04-03 20:27:43</span></div></div><div class="fzithome-com art-content"><article class="single-post"><div class="fzithome-com entry"><p></p><div></img><br>2023年11月24日�(作者：)<p style='text-indent:30px;top:113.663;left:365.475;'><span style='font-size:27px;color:#000000;font-family:MicrosoftYaHei-Bold;font-weight:bold;'>风扇控速原�</span><p><p style='text-indent:30px;top:125.471;left:527.505;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:158.379;left:135.036;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:187.808;left:219.09;'><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>一�引言</span><p><p style='text-indent:30px;top:193.331;left:261.03;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:234.608;left:324.075;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>风扇作为常�的散热设备，广泛应用于电脑�空调�汽车等领域。</span><p><p style='text-indent:30px;top:281.408;left:366.015;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>在实际应用中，我们�常需�调整风扇的转速�满足��的散热需</span><p><p style='text-indent:30px;top:328.208;left:555.045;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>求。那么，风扇是如何实现控速的呢？本文将介�风扇控速的原�</span><p><p style='text-indent:30px;top:375.008;left:158.79;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.037px;font-family:MicrosoftYaHei;'>和实现方法。</span><p><p style='text-indent:30px;top:380.531;left:284.655;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:415.824;left:731.49;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:445.253;left:164.73;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.071px;font-family:MicrosoftYaHei;'>二�风扇的工作原�</span><p><p style='text-indent:30px;top:450.776;left:212.07;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:492.053;left:638.925;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>风扇是通过电机驱动�片旋转，产生气��实现散热效果的。风扇</span><p><p style='text-indent:30px;top:538.853;left:303.015;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>的转速直接影�其散热效果，通常风扇转速越高，产生的气�就越</span><p><p style='text-indent:30px;top:117.608;left:135.036;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.2px;font-family:MicrosoftYaHei;'>PWM</span><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>（</span><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>Pulse </span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.029px;font-family:MicrosoftYaHei;'>Width </span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.037px;font-family:MicrosoftYaHei;'>Modulation</span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.029px;font-family:MicrosoftYaHei;'>）控制是�一�常�的风扇控速</span><p><p style='text-indent:30px;top:164.408;left:190.29;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.359px;font-family:MicrosoftYaHei;'>方�。</span><span style='font-size:21.06px;color:#000000;letter-spacing:0.2px;font-family:MicrosoftYaHei;'>PWM</span><span style='font-size:21.06px;color:#000000;letter-spacing:0.375px;font-family:MicrosoftYaHei;'>控制通过改�风扇供电电压的�空比�实现对风扇转</span><p><p style='text-indent:30px;top:211.208;left:211.35;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.378px;font-family:MicrosoftYaHei;'>速的控制。具体而言，</span><span style='font-size:21.06px;color:#000000;letter-spacing:0.2px;font-family:MicrosoftYaHei;'>PWM</span><span style='font-size:21.06px;color:#000000;letter-spacing:0.371px;font-family:MicrosoftYaHei;'>控制会以高频率的脉冲信��控制风</span><p><p style='text-indent:30px;top:258.008;left:274.845;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.451px;font-family:MicrosoftYaHei;'>扇的供电，通过改�脉冲信�的高电平时间和低电平时间的比例，</span><p><p style='text-indent:30px;top:304.808;left:346.639;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.408px;font-family:MicrosoftYaHei;'>�控制风扇的转速。当高电平时间�比较大时，风扇供电电压较高，</span><p><p style='text-indent:30px;top:351.608;left:463.934;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.408px;font-family:MicrosoftYaHei;'>风扇转速也就较快；当低电平时间�比较大时，风扇供电电压较低，</span><p><p style='text-indent:30px;top:398.453;left:199.29;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.071px;font-family:MicrosoftYaHei;'>风扇转速也就较慢。</span><p><p style='text-indent:30px;top:403.976;left:265.53;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:439.224;left:349.455;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:468.653;left:415.695;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.056px;font-family:MicrosoftYaHei;'>四�风扇控速的实现方法</span><p><p style='text-indent:30px;top:474.176;left:324.075;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:515.453;left:366.015;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>根�风扇控速的原�，�以采用��的方法�实现风扇的控速。下</span><p><p style='text-indent:30px;top:562.253;left:429.015;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.058px;font-family:MicrosoftYaHei;'>�将介�两�常�的实现方法。</span><p><p style='text-indent:30px;top:567.776;left:158.79;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:603.024;left:263.549;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:632.453;left:638.925;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.031px;font-family:MicrosoftYaHei;'>1. </span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.094px;font-family:MicrosoftYaHei;'>电压调节器</span><p><p style='text-indent:30px;top:637.976;left:219.09;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:679.283;left:282.09;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>电压调节器是一�常�的风扇控速设备，通过改�输入电压大��</span><p><p style='text-indent:30px;top:726.083;left:200.19;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>实现对风扇转速的控制。电压调节器通常具有一个旋钮或开关，用</span><p><p style='text-indent:30px;top:772.883;left:650.984;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.065px;font-family:MicrosoftYaHei;'>户�以根�需�调节电压大�，从而改�风扇的转速。</span><p><p style='text-indent:30px;top:778.406;left:716.189;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:813.654;left:478.184;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:843.083;left:544.425;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.101px;font-family:MicrosoftYaHei;'>2. PWM</span><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>调速器</span><p><p style='text-indent:30px;top:848.606;left:195.51;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:889.883;left:552.525;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.2px;font-family:MicrosoftYaHei;'>PWM</span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.059px;font-family:MicrosoftYaHei;'>调速器是�一�常�的风扇控速设备，通过调节</span><span style='font-size:21.06px;color:#000000;letter-spacing:0.2px;font-family:MicrosoftYaHei;'>PWM</span><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>信�</span><p><p style='text-indent:30px;top:117.608;left:135.036;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>风扇控速广泛应用于�个领域，以满足��的散热需求。以下是一</span><p><p style='text-indent:30px;top:164.408;left:324.075;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.071px;font-family:MicrosoftYaHei;'>些典型的应用场景：</span><p><p style='text-indent:30px;top:169.931;left:158.79;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:205.179;left:242.67;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:234.608;left:414.975;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.031px;font-family:MicrosoftYaHei;'>1. </span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.063px;font-family:MicrosoftYaHei;'>电脑散热</span><p><p style='text-indent:30px;top:240.131;left:464.114;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:281.408;left:183.81;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.047px;font-family:MicrosoftYaHei;'>在电脑中，风扇控速�以根�</span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.094px;font-family:MicrosoftYaHei;'>CPU</span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.072px;font-family:MicrosoftYaHei;'>的温度�自动调节风扇转速，以</span><p><p style='text-indent:30px;top:328.208;left:233.13;'><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>��</span><span style='font-size:21.06px;color:#000000;font-family:MicrosoftYaHei;'>CPU</span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.071px;font-family:MicrosoftYaHei;'>的温度在安全范围内。这样�以有效�低电脑噪音，延长</span><p><p style='text-indent:30px;top:375.008;left:303.015;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.054px;font-family:MicrosoftYaHei;'>电脑的使用寿命。</span><p><p style='text-indent:30px;top:380.531;left:239.97;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:415.824;left:344.955;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:445.253;left:219.09;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.031px;font-family:MicrosoftYaHei;'>2. </span><span style='font-size:21.06px;color:#000000;letter-spacing:-0.063px;font-family:MicrosoftYaHei;'>空调调节</span><p><p style='text-indent:30px;top:450.776;left:545.505;'><span style='font-size:15.84px;color:#000000;font-family:DengXian-Regular;'> </span><p><p style='text-indent:30px;top:492.053;left:611.204;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>在空调中，风扇控速�以根�室内温度和用户需求�自动调节风扇</span><p><p style='text-indent:30px;top:538.853;left:229.709;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>转速，以实现舒适的室内环境。当室内温度较高时，风扇转速会增</span><p><p style='text-indent:30px;top:585.653;left:295.635;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>加，增加散热效果；当室内温度适宜时，风扇转速会�低，�少能</span><p><p style='text-indent:30px;top:117.608;left:135.036;'><span style='font-size:21.06px;color:#000000;letter-spacing:0.431px;font-family:MicrosoftYaHei;'>�的风扇控速，�以�高设备的散热效果，�低能耗和噪音，延长</span><p><p style='text-indent:30px;top:164.408;left:303.015;'><span style='font-size:21.06px;color:#000000;letter-spacing:-0.054px;font-family:MicrosoftYaHei;'>设备的使用寿命。</span><p></div><p></p><div></img></div></br></div></article></div><div class="fzithome-com info"><div><span>本文�布于:2023-11-24，感谢您对本站的认��</span></div><div><span>本文链接:</span><a href="https://www.fzithome.com/xitong/1700764635a1360.html" title="风扇控速原�">https://www.fzithome.com/xitong/1700764635a1360.html</a></div><div><span>版�声明:本站内容��自互�网，仅供演示用，请勿用于商业和其他�法用途。如果侵犯了您的�益请与我们�系，我们将在24�时内删除。</span></div></div><span class="tag"><i class="iconfont icon-discount" style="font-size:12px;font-weight:bold;opacity:.7;">本文标签：</i><a href="/tag/7.html" target="_blank">怎么调电脑风扇转速</a></span></div><div class="fzithome-com post_comments" id="comments"><div id="comt-respond" class="commentpost"><h4>�布评论
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