Basics of Motors and Drives
When studying electrical supplies, it is important to know the difference between a motor and drive. A motor powers a machine. It can be a mechanical or electrical device that generates the force used to make the machine run. The drive harnesses and controls the energy sent to the motor. It applies the energy in varying amounts as needed, controlling the motor’s speed and torque. Motors and drives work together to form a ‘drive system’.
There are two types of drives. One is the standard inverter drive and the other is the servo drive. Both drives control speed and torque, but the servo drive also positions the machine’s components when used in applications that require complex motions.
Electrical drives can often be found in manufacturing facilities. Because it is responsible for so much of the machine’s functioning, it consumes quite a bit of energy. Therefore, it is important to select an energy efficient drive. You want to select a drive that is precisely sized for its specific application. An oversized drive will expend more energy while performing a similar function.
Calculating the energy efficiency of the product is recommended. Also, think about productions costs and CO2 emissions. If the drive is using dc power recovery instead of a brake resistor, that could result in energy savings as well.
There are many variables that come into play when choosing a motor which makes it difficult to find the right one. It’s important to consider the specifics of the machine design as well as the project budget and desired performance. Here are some things those selecting a motor might want to consider.
- Speed: Does the motor run at a speed sufficient for your job?
- Torque and Inertia: Torque is the amount of radial force on the shaft. There must be enough torque to move your load. Gearboxes can help reduce the inertia from large loads.
- Size: If you are building a small part, a smaller motor will be ideal. You must look at something size appropriate that will operate at the speed and torque desired.
- Communication: Different motors offer different communication options. You should find one that offers the ease of use and convenience you prefer as well as one that will work well with your machinery.
- Accuracy and resolution: How accurate do the motors have to be? Is your machinery making precise movements? How fine are the movements that your machine must make? The finer the moves that need to be made are, the higher the resolution of the motor should be.
Those interested in purchasing electrical motors and drives for their machinery can consult electrical supplies online. There are many online resources that are specific to electric motor drives. Be sure you are buying exactly what you need when buying online. If you think it’s best to consult an expert, there are also many electrical supply stores that specialize in motors and drives as well.
Before making a selection, it is important to familiarize yourself with the various types of motors and drives available to select products that are energy efficient and suited to your job. Good luck in finding the product that is best for you.