Factors to Consider When Choosing a Frequency Converter
The supply voltage of a frequency converter matters a lot in choosing a frequency converter. Choosing the right supply voltage is the first step of picking the right frequency converter. Users normally have different interpretation methods of the voltage of the frequency converter. There are users who normally you can use a 220 VAC on a 380 VAC three-phase unit. The following are the most popular three-phase connection; 220 VAC connection and 380 VAC connection. The best thing to do if you are not so sure about the voltage of the motor is to contact the manufacturer. In most instances, the voltage capacity is normally indicated on the nameplate.
Horsepower of the frequency converter is also a crucial factor that should be put into consideration. The best way to choose a frequency converter is to choose it depending on the motor capacity. You should not forget about the current of the motor because it is also an important factor and can determine the type of frequency converter that you get. The most important thing to understand is that the moment you increase the number of the motor poles of the frequency converter that has the same capacity size as the motor, the efficiency goes down. It is important to make sure that you check on the power horse of the frequency converter you are considering to buy.
It is good to be sure of the motor torque requirement when you want to buy a frequency converter. The internet has all the resources that can help you to understand the formula of finding torque of the motor. In order to produce the required torque, a frequency converter normally produces full load torque to the base frequency.
Another thing that is important when buying a frequency converter is to check on the DC injection braking. The principle behind hoisting application is that no speed is needed for a short time in order for the mechanical brakes to open or close. The production of torque at zero speed is possible since the frequency converter injects a direct current into the motor.
Resistive braking also matters in the selection of the frequency converter. When you do not need to activate the voltage protection in order reduce the speed of the motor, you can simply use the resistive braking. In cases where loads are unstable or a quick reduction of speed is required, resistive braking comes in handy.
The cost of the frequency converter is also important. The brand of the frequency converter dictates the cost price of the converter. Quality also matters in the price variation of the frequency converter. Do not go for frequency converter brands that have bad reputations on the market.