New Solution for Motor Withstanding Large Locked-rotor Currents

In some applications, motors need to be able to withstand large locked-rotor currents, which occur when the rotor of the motor is blocked or obstructed, causing the current generated by the motor to reach high levels.


Power tools stand as indispensable companions for both professionals and DIY enthusiasts, bridging the gap between vision and creation. Whether you're drilling holes or cutting through wood, the reliability and safety of your power tools are paramount. Look no further; your quest for the ultimate solution ends here with our cutting-edge Brushless DC (BLDC) motor equipped with a robust electronic control system.

Features that Redefine Proficiency

CJC managed to launch an innovation by replacing the traditional magnetic ring with a magnetic piece in the BLDC motor. This transformation catapults overall performance, achieving an incredible 85% efficiency without the driving board and a remarkable 80% efficiency with the driving board. Beyond energy savings, this innovation champions sustainability, offering an eco-friendly solution for your power tools.

Advantages of Magnetic Piece:

Improved Efficiency

The use of discrete magnetic pieces allows for more precise control over the magnetic field within the motor.

Example: In a traditional magnetic ring setup, there might be some inefficiencies or magnetic losses. By using individual magnetic pieces strategically placed in the rotor, it becomes possible to optimize the magnetic flux, reducing losses and improving overall efficiency. This enhanced efficiency can lead to benefits such as lower energy consumption and reduced heat generation.

Reduced Cogging Torque

Cogging torque refers to the non-uniformity in torque experienced by the motor as it rotates. It can cause vibrations and affect the smoothness of motor operation.

Example: The traditional magnetic ring design may contribute to cogging due to its continuous nature. When replaced with discrete magnetic pieces, the irregularities in the magnetic field that contribute to cogging can be minimized or better controlled. This reduction in cogging torque results in smoother motor operation, especially at low speeds, which is crucial in applications where precise control and low vibration are essential, such as robotics or electric vehicles. 

Drive Design

The adoption of an external driving board not only optimizes internal space but also yields a compact yet powerful solution for power tools. The double-layer drive plate and strategically designed fan blades contribute to efficient heat dissipation, preventing overheating during prolonged use and ensuring an extended lifespan for the motor.

Noteworthy MOS Chip Technology

Embedded within the driving board, our BLDC motor boasts a MOS chip that sets it apart from the competition. This technology is engineered to withstand large locked-rotor currents, with rigorous testing ensuring stability in operation. Capable of handling a maximum current of 17A, this advanced feature guarantees both reliability and safety for your power tools, averting potential damage and downtime.

Application Fields

In electric motors, MOS (metal-oxide-semiconductor) chips typically refer to MOSFET (metal-oxide-semiconductor field-effect transistor) chips used to control motor drives. MOSFET is a type of semiconductor device used to amplify or switch electronic signals. In motor drives, MOSFETs are usually used as switches in the circuit to control the flow of current, thereby achieving motor start-stop and speed control.

These MOSFET chips are usually integrated into the motor control circuit and can be opened or closed by a control signal to turn on or off the motor’s current path. The use of these integrated chips can simplify the design of the motor control circuit and improve system efficiency. 

Applications Across Industries

The versatility of CJC’s BLDC motor extends across various application fields, with a primary focus on power tools and small blenders. Whether crafting high-performance drills, compact circular saws, or efficient blenders, our motor stands as the ultimate solution. Its adaptability and reliability make it the prime choice for demanding tasks in the power tools industry.

Here are some examples of motor applications that require the ability to withstand large locked-rotor currents:

Starting motor: In some applications, the motor needs to be able to withstand instantaneous high currents to overcome inertia and resistance during startup.

Power tools: For example, electric drills, hammers, and other tools may encounter high loads or resistance during use, so the motor needs to be able to withstand large currents.

Conveyor belts and lifting systems: In some industrial applications, the motor may need to push or lift heavy objects, which can cause the motor to experience large currents during startup or when encountering locked-rotor resistance.

In conclusion, the BLDC motor, armed with an electronic control system, emerges as the quintessential solution to the challenges faced by power tool enthusiasts. Its stellar combination of high efficiency, unwavering reliability, and enhanced safety positions it as the perfect choice for both professionals and DIY enthusiasts. If you seek a motor capable of handling substantial locked-rotor currents, ensuring the utmost reliability and safety for your product, your search concludes with the BLDC motor. Elevate your power tool experience with the innovation that outshines the rest.

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