固态逆变器/主电源交流转换电路使用TRIACS

该帖子解释了2个简单的概念，用于制作固态TRIAC逆变器/主电源交流转换电路，音乐女孩要求该想法。

技术规格

我想用2个SCR替换SPDT继电器。您会考虑一个电路来代替这些电路吗转换继电器？
I believe a relay would need to handle 60 amps to be effective for the inverter side... and a smaller SCR for the Charger side.

Many thanks for the great work you do

设计＃1

The functioning of the above shown triac based solid state inverter mains changeover circuit may be understood with the help of the following points:

Assuming mains grid AC to be present:

1）电池充电器部分处于活动状态并为电池充电。

2）充电器电源的DC保持T2，TRIAC TR2打开。

3）TR2允许负载从电源交流电源中获取电源电源电压。

4) T2 keeps triac TR1 and T1 switched OFF, disabling the battery supply to the inverter and cutting-off the mains entry from the inverter to the load respectively.

5) In an event when mains AC fails, T2 and TR2 switch OFF giving rise to the following conditions.

6）T1将电池的负面连接到逆变器电路，然后迅速打开。

7) TR1 makes sure that AC generated by the inverter is instantly allowed to pass to the appliances ensuring an uninterrupted changeover from the AC mains to the inverter mains through the relevant switching of the triacs.

设计＃2：逆变器/主电源的自动三轮车转换电路

下面的第二条电路讨论了从电源到逆变器反之亦然，以确保荷载良好的逆变器电源传递。这是为了消除电网能计记录公用事业账单中逆变器供应消耗的可能性。这个想法是由Puneet先生要求的

电路目标和要求

1. 很高兴得到您的指导。太感谢了。
2. 我在寻找SPDT/DPDT SSR需要用最小的功率/热量工作24*7。
3. 我的住所基本上分为两个部分由两个不同的230V AC相供电的部分。让我们命名P1和P2。
4. Now, the problem starts when a power inverter comes into picture. The inverter is powered by P1 but powers some electricals in other section which is basically powered by P2.
   借助新的能量表，基本上根据传入阶段和传出中性电流之间的差异来计算消耗，确实可以计算两个能量计的负载。
5. I thought of putting a SSR based phase selector (not mechanical one due to wear and tear on 230v AC load).
6. SPDT NC将连接反转，而不将负载连接到P2。P2会为扳机供电，即操作继电器。
7. So when P2 is available, it would ON the relay and NO would connect powering load with P2, whereas in absence of P2 would switch off relay connecting invertor line to section load.
8. 我发现很难找到一些满足我的要求或非常昂贵的SPDT/DPDT SSR，因此，如果您可以帮助我进行任何此类电路。

评估电路

谢谢Puneet，基本上您想要一个固态SPDT转换继电器which will switch the load from mains to inverter during mains failure and vice-versa when mains returns....this will also prohibit the energy meter from registering the inverter current in its calculation while inverter is running.

我希望我正确理解了吗？

这也需要隔离中性，以使能量计在缺席的主体中完全与中性线完全断开。

隔离中性

That's perfectly right!

I would beg to differ on the last point - isolation of neutral on mains absence. The reason being the live wire from invertor is directly connecting in section2 and not from energy meter. Since mains is off, i believe the energy meter circuit may not be powered to sense the consumption on neutral side.

我的假设可能是错误的。因此，如果您觉得中性也需要隔离，请相应地设计电路。那是我遇到的一些混乱，因此我总是在我的要求中提到SPDT/DPDT。

让我知道是否需要更多信息。

Thank you
puneet

解决方案：

I think DPDT could be slightly more complex with a基于TRIAC的继电器，因此最好坚持使用SPDT变体。

我认为你可以给最后一个领域在th电路e above article a try, with some modifications.

在这里，您可以将TRIAC的下引线连接在一起，并与载荷连接（与中性的负载的另一端），而上线可以分离并与各个阶段（电源和逆变器）连接在一起

为了在两种情况下提供电路，我们可以分别使用两个0.33UF，一个与电源连接，另一个与逆变器相连接。

只是为了清楚的理解，我对关于0.33UF电容器的最后一句话感到困惑，我应该把它们放在哪里？

Few queries:

1。do I need to add heat sinks to the triacs? 2. I believe the trigger is 5v dc sourced from mains. Should I go for transformer supply to drop 230v ac to 5/6v ac and rectify? If you have any specific design for that please guide me. 3. If not dc in above, do I need to take special care for zero crossing for the optocoupler.

我按照您的说明重新绘制了电路图，但无法在此处上传。

嗨，puneet，您可以将图发送到我的电子邮件

扳机可以是不关键的5V或12V。

在最后一个图中，可以看到0.33UF与电源连接，您可以从齐纳侧连接第二个0.33UF，并将其另一端与逆变器电源连接起来...这将使晶体管电路都能在两者中运行在不存在和存在电源的情况下。

根据我的说法，不需要零跨触发。

修改的三轮车转换设计

你好斯瓦加塔姆，

Please find attached the modified circuit diagram. I hope i have modified it as per your instructions. Let me know your valuable feedback.

我还要求您建议在触发端获得5V DC信号的最佳选择。我应该寻找无变压器的供应或变压器。

关于0.33UF电容器，我怀疑我是否建立了正确的连接，或者这应该来自Triacs的下端，因为这里的两个相输入会碰撞。

更正

Hello Puneet,

the 0.33uF connections are OK, the current on the other side of 0.33uF will be quite low and won't harm each other.

the lower side of the triacs are supposed to be connected only with the load not with the circuit negative, the negative of the circuit should be connected directly with the neutral. rest all looks OK.

Thank you so much for your quick reply.

我希望这是正确的。我的厄运，我没有看到阶段短短到下三角方面的地面/中立

该电路能够处理约500瓦的负载吗？

Hello Puneet,

现在看起来还可以，希望应该按照期望运行。

The trigger to the opto could be extracted from either of the mains supply, that is either from the inverter mains or the grid mains, depending on which one is selected for the activating the triac changeover circuit.

光O的输入可以通过68K 5瓦电阻与这些耗材连接。