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发表于 2018-3-17 01:15:46
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并行使用两个伺服阀是一个好主意。
如果
1.你找不到更大的阀门。
2.两个较小的阀门比较大的阀门更快或更线性。
3.两个阀门的零位可以调整为相同。
任何两个伺服阀可以并联使用,但最好是相同类型。
液压伺服控制器不会有任何控制问题。它会将两个或多个阀并联处理为一个大阀。
问题是阀门的控制信号。不能超过电流和电压限制。带有电压输入的伺服阀通常具有很高的阻抗,因此+/- 10伏信号可以通过两个并联的阀门进行连接。当两个阀门使用电流时,最好串联两个阀门,使相同的电流流向每个阀门。但是,伺服阀内部有两个线圈。这些可能需要并联连接,因为串联的四个线圈会超过控制器输出的电压能力。
在一种情况下,客户想要并联连接两个伺服阀,所以如果一个阀中的接线失败,另一个阀仍然可以工作。我不认为这是一个好主意,但这是客户想要的。在这种情况下,伺服阀中的线圈应串联连接,否则电流要求可能超过控制器电流输出的能力。
Using two servo valves in parallel is a good idea.
if
1. You cannot find a bigger valve.
2. The two smaller valves are faster or more linear than the bigger valve.
3. The null of the two valves can be adjusted to be the same.
Any two servo valves can be used in parallel but it is best if they are the same type.
The hydraulic servo controller will not have any problems with control. It will treat the two or more valves in parallel as one big valve.
The problem is the control signal to the valves. Current and voltage limits cannot be exceeded. Servo valves with voltage inputs usually have high impedence so a +/- 10 volt signal can go to two valves wired in parallel. When the two valves use current it is best to wire the two valves in series so the same current goes to each valve. However, there are two coils inside the servo valve. These may need to be wired in parallel because four coils in series would exceed the voltage capabilities of the controller output.
In one case the customer wanted to wire the two servo valves in parallel so if the wiring in one valve failed the other valve would still work. I didn't think this was a good idea but this is what the customer wanted. In this case the coils in the servo valve should be wired in series otherwise the current requirements may exceed the capability of the controller current output.
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