The difference between inverter and motor

The concept and working principle of frequency converter

The frequency converter, also known as the variable frequency speed regulator, is an electronic device used to control the speed of an AC motor. It adjusts the motor speed by changing the power supply frequency of the motor, thereby achieving precise control of the motor. It is widely used in various mechanical equipment, such as fans, water pumps, reels, machine tools, etc.

The working principle of the inverter is as follows: it converts AC power into DC power, modulates DC power into high-frequency AC power through a group of thyristors or MOS tubes, and then outputs this power to the motor for speed control. Specifically, when the input voltage frequency changes, the inverter can change the speed of the drive motor by controlling the frequency and amplitude of the output voltage. In addition, the inverter can also monitor the operating status of the motor and protect it.

The concept and working principle of electric motor

An electric motor is a device that converts electrical energy into mechanical motion. It is one of the foundations of modern electrified society and is used to drive various machines and equipment. In a broad sense, an electric motor is a mechanical part that turns the motor. They can run various mechanical equipment, such as water pumps, fans, boilers, compressors, various machine tools, trams, electric cars, etc. in industrial workshops.

The working principle of the motor is to use the interaction of electric field force and magnetic field force to generate a magnetic field under the excitation of the electromagnet, thereby generating electric power. Specifically, when the current flows through the electromagnet coil, a magnetic field is generated, and the magnetic field interacts with the magnetic field generated by the permanent magnet or the iron core, thereby generating electric power, causing the rotor of the motor to rotate, thereby achieving the purpose of converting electrical energy into mechanical energy. Therefore, the main components of the motor include the stator, rotor and magnetic field excitation part. Whether the motor can operate normally is closely related to the design and manufacturing technology of these three parts.

Key benefits of frequency converters and electric motors

The main advantages of frequency converters and electric motors are as follows:

Frequency Converter:

1. It can automatically control the speed and torque of the motor to achieve precise control;

2. Save energy, reduce the energy consumption of motor operation, and reduce energy waste;

3. Increase the life of equipment, reduce failure rate and reduce maintenance costs;

4. Improve the efficiency of system operation and improve production efficiency;

5. Reduce noise and vibration and improve working environment.

Electric Motor:

1. Strong power, capable of generating large driving force;

2. Strong anti-interference ability, able to work normally in harsh environment;

3. High working reliability, stable operation, simple and convenient maintenance;

4. Huge quantity, wide application, fierce market competition and relatively low price;

5. When used with a frequency converter, more precise control can be achieved, improving production efficiency and quality.

The difference between inverter and motor

Both inverters and electric motors belong to the category of motors, but their roles and functions are very different.

1. Different functions: The frequency converter is a device that controls the running speed and torque of the motor, which is equivalent to a speed regulator of the motor; while the motor converts electrical energy into mechanical energy to realize the operation of mechanical equipment.

2. Different principles: The frequency converter controls the operation of the motor by changing the power supply frequency and voltage to adjust the motor speed; while the motor uses the effect of the magnetic field to convert electrical energy into mechanical energy to rotate the power equipment.

3. Different structures: The inverter is usually composed of a power module, a control module, a power module, etc., while the motor is composed of a stator, a rotor, a shaft, etc.

4. Different uses: Frequency converters can be used for various motors with high operating requirements, such as elevators, air conditioners and conveyors, making the operation of the motors more stable and efficient; while electric motors are widely used in various mechanical equipment such as automobiles, ships, machine tools, etc.

To sum up, although frequency converters and electric motors both belong to the category of motors, their functions, principles, structures and uses are very different.