Mag drive simply means that there is a big magnet on the impeller that is spun be means of coils of wire connected to an AC current without any direct physical coupeling. The BIGGEST advantage of a Mag drive pump is that they do not have a shaft from an external motor to the impeller. 90% of the problems with shaft drive (non mag drive) pumps is usually the seal around the shaft wearing and starting to leak. (have you ever had to replace the water pump on a car?)
An AC mag drive or shaft drive will run at a fixed speed based on the 60hz (or 50hz) coming from your power company. The new DC pumps are not really running like a conventional DC motor. They are actually mag drive AC motors BUT the AC current fed into the drive coils is modulated from DC current by the pump controller. By varying the modulated frequency of the modulated AC current sent to the pump coils the controller can vary the speed the impeller is running at. This is where the variable speeds come from in the DC mag drive pumps.
Modulated AC current from a DC source can be choppy depending on how the controller modulates the AC current. An advanced controller will modulate nice smooth AC current that follows the pattern of a sine wave. This is where the "New advanced sine wave technology" comes from. An impeller will technically run smoother when driven by AC modulated to form a sine wave... but it is just moving water so who cares how smooth the impeller runs? Well besides the impeller running smoother it ALSO runs more efficiently... so efficiency is the main advantage of "Sine wave technology".
I like my Jebao pumps and I will keep using them. Neither of the controllers on my Jebao DCP pumps are much above ambient temperature meaning they are definitely not hot. My biggest complaint about my DCP pumps is they did such a nice job of using a secure screw on electrical connector between the controller and the pump... why didn't they also use a screw on connector between the transformer and the controller? That standard 12vdc connector comes out much too easily. My other complaint is the non-American threads for the water connections and the metric hose connections are a pain to work with (Darn you Carter for failing!).
An AC mag drive or shaft drive will run at a fixed speed based on the 60hz (or 50hz) coming from your power company. The new DC pumps are not really running like a conventional DC motor. They are actually mag drive AC motors BUT the AC current fed into the drive coils is modulated from DC current by the pump controller. By varying the modulated frequency of the modulated AC current sent to the pump coils the controller can vary the speed the impeller is running at. This is where the variable speeds come from in the DC mag drive pumps.
Modulated AC current from a DC source can be choppy depending on how the controller modulates the AC current. An advanced controller will modulate nice smooth AC current that follows the pattern of a sine wave. This is where the "New advanced sine wave technology" comes from. An impeller will technically run smoother when driven by AC modulated to form a sine wave... but it is just moving water so who cares how smooth the impeller runs? Well besides the impeller running smoother it ALSO runs more efficiently... so efficiency is the main advantage of "Sine wave technology".
I like my Jebao pumps and I will keep using them. Neither of the controllers on my Jebao DCP pumps are much above ambient temperature meaning they are definitely not hot. My biggest complaint about my DCP pumps is they did such a nice job of using a secure screw on electrical connector between the controller and the pump... why didn't they also use a screw on connector between the transformer and the controller? That standard 12vdc connector comes out much too easily. My other complaint is the non-American threads for the water connections and the metric hose connections are a pain to work with (Darn you Carter for failing!).
