原帖由 alex2000 于 2009-3-2 14:54 发表 http://bbs.headphoneclub.com/images/common/back.gif
新人问个 如用在线式UPS电源 是否比P100好？
UPS绝对不行！
原帖由 跟你丫死磕 于 2009-3-2 15:28 发表 http://bbs.headphoneclub.com/images/common/back.gif
UPS绝对不行！
给个理由～
为什么能用P100而不能用纯在线式双转换ups？原理上来看ups还比p100高一点点，价格也公道的多
你从哪里看出原理上UPS比P100高的？
UPS是脉宽调制技术，本身就是个高次谐波发生源
P100是类似功率放大器的技术
你说哪个适合HIFI呢
原帖由 跟你丫死磕 于 2009-3-2 17:25 发表 http://bbs.headphoneclub.com/images/common/back.gif
你从哪里看出原理上UPS比P100高的？
UPS是脉宽调制技术，本身就是个高次谐波发生源
P100是类似功率放大器的技术
你说哪个适合HIFI呢
请死磕讲讲两者区别:)
Line-interactivehttp://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Line-Interactive_UPS_Diagram.png/500px-Line-Interactive_UPS_Diagram.png
Line-Interactive UPS. Typical protection time: 5 - 30 minutes. Capacity expansion: Several hours
The Line-Interactive UPS is similar in operation to a Standby UPS, but with the addition of a multi-tap variable-voltage autotransformer. This is a special type of that can add or subtract powered coils of wire, thereby increasing or decreasing the magnetic field and the output voltage of the transformer.
This type of UPS is able to tolerate continuous undervoltage
and overvoltage surges without consuming the limited reserve battery power. It instead compensates by auto-selecting different power taps on the autotransformer. Changing the autotransformer tap can cause a very brief output power disruption, so the UPS may
chirp
for a moment, as it briefly switches to battery before changing the selected power tap.
Autotransformers can be engineered to cover a wide range of varying input voltages, but this also increases the number of taps and the size, weight, complexity, and expense of the UPS. It is common for the autotransformer to only cover a range from about 90v to 140v for 120v power, and then switch to battery if the voltage goes much higher or lower than that range.
In low-voltage conditions the UPS will use more current than normal so it may need a higher current circuit than a normal device. For example to power a 1000 watt device at 120 volts, the UPS will draw 8.32 amps. If a brownout occurs and the voltage drops to 100 volts, the UPS will draw 10 amps to compensate. This also works in reverse, so that in an overvoltage condition, the UPS will need fewer amps of current.
Double-conversion / online
The Online UPS is ideal for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations. Although once previously reserved for very large installations of 10kW or more, advances in technology have permitted it to now be available as a common consumer device, supplying 500 watts or less. The Online UPS is generally more expensive but may be necessary when the power environment is "noisy" such as in industrial settings, for larger equipment loads like data centers, or when operation from an extended-run backup generator is necessary.
The basic technology of the online UPS is the same as in a Standby or Line-Interactive UPS. However it typically costs much more, due to it having a much greater current AC-to-DC battery-charger/rectifier, and with the
and inverter designed to run continuously with improved cooling systems. It is called a
Double-Conversion
UPS due to the rectifier directly driving the inverter, even when powered from normal AC current.
In an Online UPS, the batteries are always connected to the inverter, so that no power transfer switches are necessary. When power loss occurs, the rectifier simply drops out of the circuit and the batteries keep the power steady and unchanged. When power is restored, the rectifier resumes carrying most of the load and begins charging the batteries, though the charging current may be limited to prevent the high-power rectifier from overheating the batteries and boiling off the electrolyte.
The main advantage to the on-line UPS is its ability to provide an electrical firewall between the incoming utility power and sensitive electronic equipment. While the Standby and Line-Interactive UPS merely filters the input utility power, the Double-Conversion UPS provides a layer of insulation from power quality problems. It allows control of output voltage and frequency regardless of input voltage and frequency.
经过纯在线式双转换ups输出的波形和电压是理想状态下的交流电
上文摘自E文版Wikipedia
[ 本帖最后由 clockrun 于 2009-3-2 18:41 编辑 ]
UPS俺试过几个APC的，比市电脏多了，压根不是好选择。
原帖由 bruceshen 于 2009-3-2 14:03 发表 http://bbs.headphoneclub.com/images/common/back.gif
可以， 为dac1上P100还是可以的，提升大不大还要取决于你家原来的供电质量， 而且p100还需要投资一根电源线。
沈版 有啥好的电源线推荐给P100吗？？一般选用什么风格的呀
用于音频HI-FI时的要求,和其他用途的要求,是很不同的. 音频不管效率,不管数字完美,不管速度快慢,只在乎听感.现在的电脑速度越做越快,重量越做越轻,体积越做越小,板子越来越薄,越来越省电,但我听过音质最好的一个笔记本集成声卡,是一台很老的砖头式的IBM.
UPS的目标工业用，对于输出交流电波形要求不高，他所讲的“输出的波形和电压是理想状态下的交流电”是相对而言的，由于使用脉宽调制技术和斩波的原理，想做成完全平滑的符合HIFI要求的交流输出几乎是不可能的，再有他的主回路早期使用晶闸管，后来改进为IGPT，这种大功率开关元件是产生高次谐波的元凶
我也只能靠工作中接触的一点随便讲讲，具体还是请自己查下专业资料吧
刚好今天搜google的时候找来这么一张图。。。有兴趣的话去原帖看看
http://www.crystalradio.cn/bbs/attachments/month_0807/20080723_eadeafd6386343e0eafbClAev3RL4BNY.jpg
原帖地址：
http://www.crystalradio.cn/bbs/viewthread.php?tid=45671
我看UPS也没LS说的这么差
差到不能用的UPS应该是国内山寨厂出品的这种UPS才对。下面的波形简直是惨不忍睹。。。
http://www.crystalradio.cn/bbs/attachments/month_0807/20080723_0380035911c455207c1eXe1E2lh1ayN4.jpg
[ 本帖最后由 clockrun 于 2009-3-6 23:26 编辑 ]
看了帖子，这样说的话还是跟ups本身品质有关
但估计那么高级的ups价格也不得了了吧
原帖由 lethe823 于 2009-3-2 18:47 发表 http://bbs.headphoneclub.com/images/common/back.gif
沈版 有啥好的电源线推荐给P100吗？？一般选用什么风格的呀
屏蔽好的细腻点的大电流线， 记住p100相当于一个100W的后级。
我推荐acrolink 4030, cse l30r, oyaide tunami gpx, ps audio statement sc
原帖由 跟你丫死磕 于 2009-3-2 14:16 发表 http://bbs.headphoneclub.com/images/common/back.gif
B版的AES数字线是不是该升级了，我接你的二手啊;P
现在用根7891A穷对付着:L
我用的是as老大啊， 还升啊:Q不过话说回来， as echelon同轴数码线素质高，而且非常非常好听，我准备一直用下去， 不换。
但。。。除非以后我升级一体机或不用同轴的分体机， 我会考虑出:lol 。
原帖由 mifeng 于 2009-3-7 01:58 发表 http://bbs.headphoneclub.com/images/common/back.gif看了帖子，这样说的话还是跟ups本身品质有关但估计那么高级的ups价格也不得了了吧 价格我不是很了解，如果是国产山特的话应该会便宜点（山特是国产最好的牌子），或是买美国APC的，相对贵一些。2000以内应该可以搞定了
我用过的在线式UPS都是进口顶级产品，非国内产品，从早期的日产富士+汤浅电池到近年的西门子、阿克塞等小到10KVA，大到65KVA四机并联冗余
LS既然认为UPS可用于音频供电就该自己尝试一下，而不是在这里耍嘴皮子，谢谢
