Which is better for dc speed regulating motor and ac converter?
The more power of the frequency conversion, the drive effect is better, because the dc speed adjustment is to lower the voltage to the lower voltage, and the resulting loss. The voltage is constant in frequency conversion, and of course there is no loss of pressure. It's cheaper to invest in dc in the first place.
See how big power, want to achieve what effect, small power, dc speed regulation general cheaper a few, big power estimate is ac electric machine. The structure of dc speed regulating system is complicated, the maintenance cost is high, the dc motor structure is more complicated than the ac, and the price is high. Inverter easy to use, the price is not expensive, cheaper ac motor, frequency converter and PLC is widely used in many fields. But not necessarily must use ac speed regulating motor. On the upfront costs, general inverter about price range in 700-3000. Dc speed governor is a kind of motor speed control device, including dc motor speed, pulse width, dc speed regulator, SCR dc speed regulator, etc., generally for modular dc motor speed regulator, integrating the power, control, drive circuit, using three-dimensional structure layout, control circuit adopts micro power components. Frequency conversion motor adopts "special inverter induction motor + frequency converter" way of ac speed regulation, make the mechanical automation degree and greatly improved the efficiency of production equipment miniaturization, increase comfort, is to replace the traditional mechanical control and dc speed control scheme
Ac converter electric power! Dc adjustable-speed motor drive effect good! The former wants economy some!
1 dc speed control system structure is complex, high cost of maintenance, complex structure of dc motor is an alternating current confidential (more than the armature, carbon brush), the price is high also 2 inverter easy to use, the price is not expensive, ac motor is cheaper (for dc motor). 3. The frequency converter and PLC is widely used in many fields.
See more power, to achieve what effect, low power, dc speed control usually are cheaper, high power estimation is ac motor, but not necessarily must use ac speed regulating motor. On the upfront costs, general inverter price range in 700-3000, probably look at your requirements and voluntary.
