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Definition, Applications, Classification, and Equipment of Inductors

Honest| 2024-01-22|Return

What is an inductor?

It is a property of a closed loop and a physical quantity. When the current passes through the coil, a magnetic field is induced in the coil, and the induced magnetic field generates an induced current to resist the current passing through the coil. It is a circuit parameter that describes the induced electromotive force effect caused in this coil or another coil due to changes in coil current. Inductance is the general term for self-inductance and mutual inductance. The device that provides inductance is called an inductor.

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Inductors have three main applications in motors:

1. Winding inductance
The winding of the motor is the core component of the motor, which is wound by a wire and has a certain inductance. The size of the winding inductance is related to the number of turns, cross-sectional area, and material of the winding.

The function of winding inductance:

A. Limit the change of current: the pressure of winding inductance will produce induced electromotive force when the current changes, resisting changes in current, thereby protecting the motor;

B. Store energy: the current flowing through the winding inductor generates a magnetic field, and energy is stored in the magnetic field. When the motor starts or runs, the magnetic field energy in the winding inductance is converted into mechanical energy, thereby providing the motor with the energy required to start or run.

2. Magnetic field inductance
The magnetic field of the motor is generated by the permanent magnet or excitation winding. The magnetic field produced by the permanent magnet is constant and the magnetic field produced by the excitation winding is variable. Magnetic field inductance refers to the inductance of the magnetic field-generating element. The size of the magnetic field inductance is related to the shape, size, and material of the magnetic field-generating component.

The role of magnetic field inductance:

A. Control the speed of the motor: the size of the magnetic field inductance affects the speed of the motor. When the magnetic field inductance increases, the speed of the motor decreases;

B. Control the torque of the motor: the size of the magnetic field inductance will affect the torque of the motor. When it increases, the torque of the motor will increase.


3. Noise suppression inductor

Noise will be generated when the motor is running. A noise suppression inductor can be used to suppress the noise generated by the motor. The size of the noise suppression inductor is related to the frequency of the noise.


Classification of inductors:

A. Classified by inductance form: fixed inductance and variable inductance;

B. Classified according to the properties of magnetic conductors: air core coils, ferrite coils, iron core coils, and copper core coils;

C. Classified by working nature: antenna coil, oscillating coil, choke coil, trap coil and deflection coil;

D. Classified by winding structure: single-layer coil, multi-layer coil, and honeycomb coil;

E. Classified by working frequency: high-frequency coil and low-frequency coil;

F. Classified by structural characteristics: magnetic core coils, variable inductance coils, color-coded inductance coils, and non-magnetic core coils.

The motor industry has very high-performance requirements for inductors, mainly including the following points:

A. High inductance: the winding inductance and magnetic field inductance of the motor need to have high enough inductance to meet the operating requirements of the motor;

B. High-temperature resistance: the high temperature will be generated during the operation of the motor, so the inductors need to have good temperature resistance to ensure that they work properly in high-temperature environments;

C. High reliability: the motor needs to have a long service life, so the inductor needs to have high reliability to ensure that it does not fail in the long-term use process.


Some of the inductor winding machine of HONESTHLS

1. NR Inductor Dispensing Machine

The NR Inductor Dispensing Machine is suitable for dispensing small-sized NR products, with a production capacity of up to 3600 PCs per hour. Key components are machined in-house using precision equipment, and standard parts are sourced from international brands. The machine also features life management for critical components. The process flow includes loading wound components via a vibrating tray, product alignment, four-sided dispensing, product unloading, and oven baking.

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Equipment parameters:

A. Production efficiency: 1s/pcs;

B. Yield rate: >99%;

C. Utilization rate: >95%;

D. Voltage: AC single phase 220V;

E. Air pressure: 0.4-0.6MPa;

F. Power: 2KW

2. Inductor SMD Test Packaging Machine

The Inductor SMD Test Packaging Machine has a production efficiency of up to 15,000 pcs per hour. It can be equipped with an automatic adhesive tray-changing system, allowing multiple trays to be loaded at once. The machine automatically switches trays without stopping, offering a fully automated operation that only requires manual feeding of material.

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Equipment Parameters:

A. Production efficiency:15000pcs/h;

B. Yield rate:>99;

C. Utilization rate:>95;

D. Voltage: AC single phase 220V;

E. Air pressure: 0.4-0.6MPa;

F. Power: 2KW;

You can rest assured that we have professional technical personnel and equipment. We can answer and satisfy any questions or needs you have. You can contact us at any time at your convenience.


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