Blog

Inverters can be adapted from stall right up to CHP ranges, only design limits are feedback device and proper cooling aspects to the machine load profile. Some applications require extended low speed performance. Normally the variable frequency drive (VFD) supplier indicates speed range capability based on type of VFD and feedback device required.

There may be some confusion between frequency and motor speed.
Open loop, typical speed regulation is plus or min ...

When a motor power is stated, it is always the mechanical power, shaft power i.e. NOT the input electrical power.

Variable frequency drives (VFD) are also (mostly) rated in terms of kW albeit it's wrong. Because VFD output is electrical (not mechanical). Mechanical power (i.e. motor shaft power) is always "active" power, where in electricity we also have reactive (doing nothing but losses) power. The apparent (total) power (stated in terms of ...

Variable frequency drive (VFD), also called frequency inverter, variable speed drive (VSD), adjustable frequency drive (AFD). This article is about the basic guide of how to select a VFD.

The correct selection of the variable frequency drive (VFD) is critical for the normal operation of the mechanical equipment electrical control system. To choose the best suitable VFD, we need to know the specified machinery type, the load torque characteristics, speed adjusting range, static spe ...

Home appliances, like TV, speaker, lights, may work with both 50 Hertz and 60 Hertz, but some appliances especially with electric motor inside it, like air conditioner, fridge, can only work with 50Hz or 60Hz. If a 50 Hz motor working on 60 Hz power system, the motor speed will be 20% faster, then cause over temperature and shorten its service life.

We all know, most European and Asia countries powe ...

What is 50Hz, 60Hz?

Alternating current (AC) is changing the direction of the current periodically; Cycle is the time of a cyclical change of the current; Frequency is the times of the current changes per second, unit Hertz (Hz). AC current direction changes 50 or 60 cycles per second, in accordance with 100 or 120 changes per second, then the frequency is 50 Hertz or 60 Hertz.

50 Hz and 60 Hz power sources are most often used in i ...

Frequency converter can help you change 60Hz to 50Hz, also can boost 110V to 220V by inner step up transformer, vice versa. Before you buying a frequency converter, it's better to understand what kinds of loads the frequency converter will be connected with. There are five common load forms: 1, resistive load; 2, inductive load; 3, capacitive load: 4, rectifier load; 5, regenerative load; 6, mixed loads. We should select the frequency conv ...

First step: For safety, please cut off the frequency converter power before doing it.
Open the left and right side covers of the converter, as show in following figures:

Second step: Power on the frequency converter and switch on power, push the green start button, check the LED indicators will be lighting or ...