15 hp (11 kW) variable frequency drive with good performance, three phase 230V, 415V, 480V for selection,manufacturer direct sale.Specification:
Tips: Variable Frequency Drive Output unbalancedVFD output unbalanced is generally expressed as motor dithering and speed instability. The main reason is the damages of the module, drive circuit, reactor, etc.For example, a 15hp VFD with output voltage difference of about 100V.Analysis and maintenance: Open the VFD, check the inverter module online and find there is no problem. Measure the six-way drive circuit and find no fault. And then remove the module, and find in bridge upper of one way, a high-power transistor cannot normally turn on and off. The module is broken. And confirmer drive circuit has no fault. Finally replace the transistor, and then the VFD is normal.