Permanent magnet synchronous DC motor can be divided into permanent magnet brushless DC motor and permanent magnet brushed DC motor according to the presence or lack of brushes. Permanent magnet synchronous DC motor is a kind of DC motor which uses permanent magnet to establish a magnetic field. Permanent magnet synchronous DC motor is widely used in a variety of portable electronic equipment or appliances, such as tape recorders,VCDMachines, record players, electric massagers and various toys are also widely used in automobiles, motorcycles, hand dryers, electric bicycles, battery cars, ships, aviation, machinery and other industries, and are also widely used in some sophisticated products, such as video recorders, photocopiers, cameras, mobile phones, precision machine tools, bank banknote counting machines, bundling machines and so on. sincePermanent magnet synchronous DC motorWith such a wide range of applications, what do consumers need to pay attention to in terms of choice and use? Here, Senli Motor Xiaobian gives you a brief introduction:

Selection principle:

(1)Type selection:

It is advisable to choose the ferrite permanent magnet DC motor with high efficiency, low price and low temperature rise. If the performance requirements are strict, the volume is small, and the ambient temperature is high, the aluminum nickel-cobalt permanent magnet DC motor or rare earth permanent magnet DC motor can be considered.

(2)Reasonable choice of motor power:

Motor output power is limited, if the motor power selection is too small, the load exceeds the rated output power of the motor will occur motor overload, overload will appear motor heating, vibration, speed decline, abnormal sound and other phenomena, serious overload, will burn the motor. If the power is too large, it will cause economic waste. Therefore, it is very important to choose the power of the motor reasonably.

(3)Specification selection:

Often due to the actual production of product specifications are not much, to the selection of products increase difficulties. In the selection of product specifications can be considered: in the case of adjustable power supply voltage, according to the actual need to choose the torque, speed and the corresponding rating of the product close to the specifications, by changing the voltage to get the required speed; In the case of a fixed power supply voltage, if there is no suitable specification of the product to choose from, the appropriate specification can be selected according to the torque, and the voltage and speed of the product can be adjusted appropriately.

Permanent magnet brushless DC motor should be noted in the application:

(1)If the product is not specifically stated, in general(For example, aluminum nickel cobalt permanent magnet DC motor or ferrite permanent magnet DC motor)The permanent magnet DC motor is not allowed to run under the rated voltage, otherwise it will cause permanent magnet demagnetization; If it is really necessary to operate in this way, a current limiting resistor is added to limit excessive current.

(2)Perform a preliminary check on the quality of the motor according to the following steps:

First check the appearance of the motor: there should be no scratches, bruises and coating off; Then turn the shaft, should be able to rotate flexibly, no obvious jamming phenomenon. Check whether the wiring of the motor is firm and run with power. There should be no friction in the process of rotation of the motor, and it is necessary to pay attention to bearing friction. Bearing wear will emit abnormal sound, local overheating temperature rise phenomenon.

(3)Pay attention to the demagnetization of permanent magnets caused by excessive current, temperature changes and the open magnetic circuit during disassembly of the motor, especially for aluminum nickel-cobalt permanent magnet motors, when disassembly, magnetic short circuit protection should be carried out on the permanent magnet magnetic circuit, otherwise it should be magnetized after demagnetization.

Senli motor annual investment in research and development funds30Ten thousand years to develop new motor products15Plant more than one. Have technical personnel6People, which are engaged in the motor industry18Over the years have2He has successively obtained more than ten patents and soft certifications. Enterprise ownership3600Square standardized factory, with equipment CNC lathes/End facing machine/Grinding machine/Drilling machine/Automatic threading machine/Automatic winding machine/Comprehensive tester/Vacuum dip paint machine/Drying machine/Dynamic balancing machine/Punching machine, etc. Annual production capacity12Ten thousand units.