以下是客人沟通记录 主要是客人的原文和我的译文 根据从早到晚的沟通顺序
(这是最早的法文原文回复部分,译文是由谷歌先翻译成英文再翻译中中文得来的,很多地方应该不准确。看大概意思即可)
Bonjour, J'ai un problème de stabilité de tension sur votre alimentation à découpage XC-360-12. J'alimente quatre câbles chauffants Thousand Oaks Optical, et à partir de 30% de PWM, la tension de sortie de votre alimentation chute à 10.6V. Le résultat est une ondulation entre 10.6V et 12V avec une période d'environ une second. Est-ce un problème de réserve de charge pour laquelle votre alimentation n'est pas prévue ? Y-a-t'il un réglage d'agressivité de tenue en tension ? Merci d'avance, -Eric
你好,我买的您的XC-360-12开关电源存在电压稳定性问题。 我为Four Thousand Oaks光学加热电缆供电,从30%PWM开始,电源的输出电压降至10.6V。 结果是10.6V和12V之间的纹波,周期约为一秒。 是否为您的电源未规划的电量储备问题? 是否存在对电阻阻力的张力调整?先谢谢你,-Eric
Merci pour votre réponse ! L'alimentation est branchée sur le secteur, monophasé 230V. Après renseignement auprès de Thousand Oaks Optical, le bloc de contrôle du système de chauffage utilise une PWM d'une seconde de période pour alimenter les câbles. J'ai testé le câble de 37 pouces seul, celui-ci consomme 500mA à lorsque la modulation est à 20%. Le câble 37 pouces est le plus gros consommateur, 0.75W par pouce de longueur, donc 2.4A en pleine charge, les autres câbles consomment moins. Dans cette situation de test, câble 37" seul, je constate que la tension de l'alimentation chute d'environ 1V toutes les secondes, ce qui correspond à l'activation de la PWM. Il est possible que la chute soit plus importante, le changement de vitesse de rotation du ventilateur de l'alimentation est très audible. Après plus de tests, il semble que votre alimentation ne soit pas en mesure de fournir une tension stable lorsqu'un pic de courant supérieur à 200mA est demandé par la charge. Ai-je fait une erreur dans mon choix de référence ? Y-a-t'il un moyen de régler l'agressivité de suivi de l'alimentation ? Merci d'avance, -Eric
谢谢您的回复 !电源连接到主电源,230V单相电。在连接Thousand Oaks Optical后,加热系统的控制块使用一秒周期的PWM来提供电缆。我单独测试了37英寸电缆,当调制为20%时,这个电缆消耗500mA。 37英寸电缆是最大的消耗者,每英寸长度为0.75W,因此满负荷时为2.4A,其他电缆消耗较少。在单独测试37“电缆的情况下 ,我看到电源电压每秒下降约1V,这对应于PWM的激活可能是下降更大,风扇的转速变化电源很容易听到。经过更多测试后,当负载要求峰值电流大于200mA时,您的电源似乎无法提供稳定的电压。我选择参照物时是否犯了错误?有没有办法规范食品监控的积极性?先谢谢你,-Eric
Thanks for your message, I'll switch to English to ease the communication. I'm using your product to supply an anti-dew heater controller, made by company Thousand Oaks Optical, that is installed on the tube of a telescope. The heating belts I mention are connected to that controller, and powered by its pulse-with modulation circuitry with a period of 1 second. I tested with one single heating cable, the longest one, 37-inch long. That cable is roughly 0.75W/in, thus consumes 2.4A when the PWM activates and causes a current surge at the output of the power supply. My problem is that the current surge causes a drop of probably more than 2V on the 12V that your power supply provides. The integrated fan even spins noticeably slower, and other equipment connected to the power supply suffer from the drop. This is with one single cable connected, and happens with a PWM as low as 20%, which indicates that your power supply has a relatively low current reserve compared to its static current capability. Situation will be worse with 3 additional cables, although those are shorter. So my question is, how can I increase the aggressiveness of your power supply, so that it reacts more quickly to a drop of output voltage. I can design a RC circuitry to act as a voltage drop slowdown, but I need advice on the best way to tackle this problem. If another of your references would be a better choice, please tell me. Thanks! –Eric
感谢您的留言,我将切换到英语以方便沟通。我正在使用你的产品来带动防雾加热器控制器,由Thousand Oaks Optical公司制造,安装在望远镜的管子上。我提到的加热电缆连线该控制器,并由其脉冲调制电路供电,周期为1秒。我用一根加热线测试,最长的一根,37英寸长。该电缆大约为0.75W / in,因此当PWM激活时会消耗2.4A电流,并在电源输出端产生电流浪涌。我的问题是,电流浪涌会导致电源12V上的电压下降超过2V。集成风扇甚至旋转速度明显变慢,连接到电源的其他设备的电压也会降低。这是连接一根电缆,并且PWM低至20%时产生的情况,这表明您的电源与其静态电流能力相比具有相对较低的电流储备。 如果再连接3条额外的电缆会使情况更糟,尽管这些电缆更短。所以我的问题是,如何增加电源的能动性,以便它对输出电压的下降做出更快的反应?我可以设计一个RC电路作为电压降减速,但我需要建议解决这个问题的最佳方法。如果您的其他参考文 献是更好的选择,请告诉我。谢谢!-Eric
Hello again, Here is a video of the setup: https://youtu.be/wgKbJdS__dQ Here are captures of my concerns: https://youtu.be/5b7Fh9HUHzw As soon as the load is connected, the hashing signal, a derivate of 50Hz, is clearly visible. Its amplitude is quite high already. When the heater cable is powered, situation is worse, as voltage drops down to 10.8V, resulting is a mean value dropping by 1V+ every second. During that test I raised voltage level to 12.5V, to see if situation would improve. –Eric
再一次问好,以下是关于安装环境的视频:https://www.youtube.com/watch?v=wgKbJdS__dQ以下是我所检测到的问题:https://www.youtube.com/watch?v=5b7Fh9HUHzw一旦连接负载,就会清楚地看到散列信号,即衍生一个50Hz的频率。 它的幅度已经非常高了。当加热器电缆通电时,情况更糟,因为电压下降到10.8V,导致平均值每秒下降1V +。在这次测试中,我将电压提升到12.5V,看情况是否会有所改善。-Eric
Hello, Yes, I tried raise the voltage to 12.5V or 13V but my problems are still there. Because the drop is still 2V when PWM triggers, I need to raise the voltage to 14V to ensure 12V. But I can't smooth that voltage, nor cut it to 12V, because that's not where the problem is. The fundamental problem of your power supply lies on picture #3 in my screenshots, where I say that hashing signal has 2V amplitude. Your power supply is using a 100Hz hashing signal taken from the 50Hz mains supply. On picture #3 I observe that: - the output capacitor gathers energy during the increasing slope of the hashing signal, the increase in voltage is very fast, up to the voltage required. - at that moment, the supply doesn't send energy to the output capacitor, and the load connected to the supply drains current, voltage starts to drop. - when voltage is low enough, the supply resumes sending current to the output capacitor to maintain the output level, voltage is kept at the same level. - but when the hashing signal enters the second half of its period, the supply is not able to send energy to the output capacitor anymore, and voltage drops like it did earlier, same slope because same current drain. - when the hashing signal enters its next period, energy is sent again and voltage returns to the requested level. My opinion is that the frequency of the hashing signal (100Hz, an AC bridge made of diodes?) is far too low to allow the output voltage to remain at the requested level when the current drain is high. The voltage is returned quickly to the requested level, but not often enough to be stable. Getting a 2V 100Hz signal on your 12V DC is not a good result at all. Please advise how I can increase the frequency of the hashing signal, if that is possible. Please advise a better reference which hashes the AC supply with a higher frequency if it is not possible. Thanks -Eric
你好,是的,我有试过调高电压到12.5V或13Vdans但是我的问题依然存在。由于PWM触发时压降仍为2V,因此我需要将电压升至14V以确保12V。但我不能平滑那个电压,也不能把它切成12V,因为那不是问题所在。您的电源的基本问题在于我的截图中的图片#3,其中我说散列信号具有2V幅度。您的电源使用从50Hz主电源获取的100Hz散列信号。在图片#3中,我观察到:
- 输出电容在散列信号的增加斜率期间收集能量,电压的增加非常快,达到所需的电压。
- 此时,电源不向输出电容发送能量,连接到电源的负载消耗电流,电压开始下降。
- 当电压足够低时,电源恢复向输出电容发送电流以维持输出电平,电压保持在同一水平。
- 但是当散列信号进入其周期的后半段时,电源不再能够向输出电容器发送能量,并且电压像先前一样下降,因为相同的电流消耗导致相同的斜率。
- 当散列信号进入下一个周期时,再次发送能量并且电压返回到所请求的电平。
我的观点是,当电流消耗很高时,散列信号的频率(100Hz,由二极管组成的交流电桥?)太低而不能使输出电压保持在要求的电平。电压快速返回到要求的水平,但通常不足以保持稳定。在12V DC上获得2V 100Hz信号根本不是一个好结果。如果可能,请告知如何增加散列信号的频率。如果不可能,请建议更好的参考,以更高的频率对交流电源进行哈希处理。谢谢
Thanks for your answer. I don't think the product is defective, a replacement would not change its behavior. It is just not able to deliver 10A per output line with a stable 12V DC, by design. I'm willing to wait for your engineer to respond, but I don't think I will be able to use your product on my setup. I will need a product reference that is able to provide a faster recharge to maintain the voltage level. If you have such product reference, please let me know. Thanks, -Eric
感谢您的回答。我不认为产品有缺陷,就算更换一个也不会改变其行为。 根据设计,它不能在每个输出端提供稳定的12V直流电。 我愿意等待你的工程师做出回应,但我认为我不能在我的这个设置上使用你的产品。 我需要一个产品参考,能够提供更快的充电,以维持电压水平。 如果您有此类产品参考,请告诉我。谢谢! |