A phase converter is a basic rotating machine, similar to a motor that converts power from a single-phase converter into 3-phase electricity, which is used to operate 3-phase equipment. They are powered by a 3-phase induction motor that can operate on an uneven and heavily loaded supply. There are three common phase converters on the market today. Keep reading to learn more about them.
Static phase converters operate on a 3-phase motor connected to a single phase. Once the motor works on only one phase because when turned on, the circuitry of the static phase converter is disconnected. This reduces horsepower output by one-half to two-thirds. A high starting torque is required for static phase converters. Static conversion involves a motor being run at less than full efficiency, usually on two of the three legs of a phase converter. Sometimes a capacitor or transformer is used to inject the third leg of the phase converter with current. This arrangement creates an imperfect phase shift. Static converters work well with machinery that can operate on half to two-thirds their rated motor horsepower.
Rotary phase converters are rotating transformers built from a generator idler or 3-phase electric motor. They usually require a starting aid and capacitors, which help enhance the balance and power of the phase. This requires 2 motors; one connected to a load to provide power to the converter, and a second one that drives the loads on the power provided by the converter. A rotary converter uses transformer action to split off and shift a part of the single-phase supply to create true 3-phase power. The three output voltages shift 120 electrical degrees, and with the correct size converter, the voltages will stay even over the whole range of connected loads. Rotary converters are ideal for use with machines that need to operate continuously, such as water pumps and lathes.
Digital phase converters use a rectifier and inverter to create voltage that powers electronics. The inverter and rectifier are added to the legs of a single-phase power source to provide 3-phase power supply. One leg on the digital converter needs to match the voltage and frequency of the supply. This allows sine-wave output voltage, which provides balance between phases. They can also generate voltage of up to 60 degrees out of phase with the other two legs. You can find all three types of 3-phase converters, and information about them and other relevant or necessary parts and features they come with, at reputable online converter supply stores.