Determining which type motor run capacitorsyou need may not be an easy task. There are many different types available today. Before you order, there are a number of parameters that need to be addressed. So how can you properly accomplish this? This article is written to assist you in determining which motor is best for your application.
 

First and foremost you will need to know what voltage source is available in your application. Electric motors can be classified as either AC (Alternating Current) or DC (Direct Current). Alternating current types only run on AC Voltage and direct current types only run on DC Voltage. There is also a universal motor that can run on both AC and DC voltages.
 

Once you have established which power source you have you will need to determine which style will work for your application. AC motors can be sub-divided into the following: Single Phase Induction, Three Phase Induction, Two Phase Servo, and Hysteresis Synchronous. DC motors can be sub-divided into: Brushless DC, Brush DC, and Stepper types.
 

Next we need to understand the different characteristics of each type in order to properly match a motor to its application.
 

A single phase induction motor is connected to a single voltage line. An external capacitor is required to make this motor operate. The different types of single phase induction motors are distinguished by which method they are started. The four basic types are: split phase, capacitor start, permanent split capacitor, and capacitor start/capacitor run.
 

A split phase motor uses a switching device to disconnect the start winding once the motor gets to 75% of its rated speed. Although this type has a simple design which makes it less expensive for commercial use, it also has low starting torques and high starting currents.
 

The capacitor start motor is basically a split phase capacitor motor with a capacitor in series with the starting winding to create more starting torque. This motor is more expensive on account of the switching and capacitor requirement.
 

A permanent split capacitor motor does not have any staring switch. For this type, a capacitor is permanently connected to the starting winding. Since this capacitor is required for continuous use, it does not provide starting power, therefore starting torques are typically low. These motors are not recommended for heavy starting load applications. However, they do have low starting currents, quieter operation, and higher life/reliability, thereby making them a good choice for high cycle rates. They are also the most reliable capacitor motor on account of not having a starting switch. They can also be designed for higher efficiencies and power factor at rated loads.
 

The capacitor start/capacitor run motor has both a start and run capacitor in the circuit. The start capacitor is switched out once achieving start-up. This type of motor has higher starting, lower loaded currents, and higher efficiency. The drawback is the expense that's required for two capacitors and a switching device. Reliability also plays a factor on account of the switching mechanism.
 

The three phase induction motor is wound for three phase alternating voltage. These are the simplest and most rugged electric motors available. The motor could be designed for either DELTA or WYE hook-up. This type is designed for continuous use and high starting torques. Motor speed is relatively constant. If three phase voltage is available this is the motor to choose.
 

Two phase servo motors are used in servo systems, hence the name. They are very sensitive to voltage variations on the control phase. This style requires two voltages in 90 degrees phase shift from each other in order to produce a rotating magnetic field. Servo motors have high torque to inertia ratio, high speed and works well for velocity control applications. Tachometer feedback devices can be supplied with these motors.

Hysteresis synchronous motors are essentially induction motors that run at synchronous speed. When your ask for needs synchronous speeds this could possibly be one of the most beneficial choice. These motors could possibly be developed for possibly sole phase or three phase. For sole phase voltage a capacitor will possibly be required. Hysteresis synchronous motors produce what's acknowledged as pull-out and pull-in torques. Pull-out torque could possibly be the quantity of torque/load the engine can manage just since it pull away from synchronous speed. Pull-in torque could possibly be the quantity of torque inside the output shaft that permits the engine to pull into synchronism and stay there. the two pull-in and pull out torques are pretty similar. These motors have reduce starting currents and reduce vibration. thinking about how the rotor assembly is developed from the cobalt material, which could be hard to appear by, this design of engine is expensive.

The instant latest (DC) motors that take place to be offered are brushless DC (BLDC), brush, and stepper motors. if you only have DC voltage offered then one of those motors must develop to be used. Brushless DC motors do not have any brushes consequently there aren't any worries of brush positioned on or sparking. stable think controls and suggestions devises are required for operation. These motors have predicable performance, large starting torques, and so are capable of large speeds. although additional energy output could possibly be achieved in the more compact package, the electric controls make this design engine expensive.

Unlike brushless motors, brush DC motors do not need any manage electronics. Brush motors use commutator and brushes to create a magnetic field. although these motors are ordinarily inexpensive, brush and commutator positioned on limits their reliability and longevity.

Stepper motors are DC motors that create incremental steps. in circumstance you need shaft positioning to develop to be predicable then stepper motors may nicely be an option. These motors are reputable and reduce in cost. They are however, limited in its ability to manage large inertia loads.

 

Once you have determined the voltage and frequency source your system has available you can determine the number of phases and type motor to look at. Next you would need to know the following in order for your motor design engineer to help choose the best motor:
 

(1) Power Output/Horsepower: The designer will need to know what the rated speed and torque parameter that your system requires.
 

(2) Frame Size: It is helpful for the designer to know the mechanical constraints in order to properly size the motor.
 

(3) Duty Cycle/Time rating: The amount of time the motor is operating vs. time it is not is an important criteria when designing the insulation systems of the motor.
 

(4) Environmental Conditions: It is always important to advise the motor designer what environments the motor will see. This is important so the correct enclosure is determined.
 

As you can see there are many different types of motors to choose from. There are also many factors used in the choice. By working with a design engineer you can ensure to get the right motor for your application. This is why it is important to seek out a manufacturer before finalizing any systems design.