Electric motors convert electrical energy into mechanical energy, and they are a key component of most household appliances. They are also widely used in industrial fans, blowers, compressors, machine tools and electric vehicles. In a basic electric motor, current flowing through coils generates magnetic fields that alternately attract and repel each other. The resulting force, known as electromagnetic induction, causes the rotor to rotate continuously. This in turn drives the shaft of the motor. buy Electric motors are categorized by considerations such as power source type, construction, application and the type of motion output they produce. They may be brushed or brushless, single-phase or three-phase, radial flux or axial, air-cooled or liquid-cooled. They can be energized by direct current (DC) or alternating current (AC). They are usually powered from rectifiers, batteries, generators or the power grid.
Voltage is the electric potential difference between two points. In motors it represents the amount of electrical energy transferred to mechanical power. Electrical power is a product of voltage times current, so to get more mechanical power you need more voltage or more current. However, increasing currents creates more heating which reduces the efficiency of your motor. Most motors have a maximum operating voltage which is usually twice their lowest operational voltage. If you exceed this voltage, the bearings and brushes will wear out faster than they should. Luckily this isn’t a problem in most cases, as the motor generates its own internal back which stops the supply voltage applying to the low resistance windings. The direction of this back is easily seen by holding your right hand up and putting your thumb perpendicular to your index finger and your middle finger to the magnetic field line generated by the conductor.
Electric motors are designed to operate at a specific frequency - in the States this is 60 Hertz. However, this doesn’t mean that motors can’t be used in other countries with different frequencies. The problem is that when a motor operates at a different frequency it can cause problems. In many cases these problems will only appear when the motor is running under load. Using a vibration analyzer with high resolution will make it easy to see these frequencies. Click here or explore our official site to access premium industrial electric motors.
The duty cycle of an electric motor refers to the amount of time a motor is running and how much time it’s at rest. This is an important factor to consider when selecting a motor, as it will impact the temperature rise of the motor and how long it can operate before overheating. Motors with this working duty are often used in crane drives, household appliances drives, valve controllers and so on. The running time is very short therefore the motor cannot reach thermal equilibrium state whereas the rest time is insufficient for the motor to get preheated to ambient temperature.
