Green, efficient and energy-saving special servo motor

Abstract

The invention discloses a green, efficient and energy-saving special servo motor which comprises a shell, a stator assembly and a rotor assembly are arranged in the shell, a rear end cover is installed at the rear end of the shell through a cross recess pan head screw, an outgoing line gland is installed at the top end of the rear end cover and the top end of a protective cover shell through screws, and the outgoing line gland is filled with an outgoing line sealing gasket. A front end cover is arranged at the front end of the shell, a magnet is arranged in the protective cover shell, the magnet is arranged between the stator assembly and the rotor assembly, and the maximum torque and the maximum rotating speed are 1.1-1.5 times of the rated torque and the rated rotating speed. The beneficial effects are that the current input into the motor by the special driver is 50%-80% of the rated current of the driver with the same power, the driver is ensured not to be protected by the rated current to give an alarm and stop the motor under the condition of load starting or instant double overload of the motor, and the mechanical efficiency of the motor is as high as 94%, so that the electric charge saved by the motor pays the lease cost of the motor; therefore, great contribution can be made to the society.

Description

technical field [0001] The invention relates to the field of motors, in particular to a green, high-efficiency and energy-saving special servo motor. Background technique [0002] Our country started late in the production of servo motors. There has been no national standard for servo motors, and there is no unified industry standard. People are influenced by foreign products when designing servo motors. Design according to the speed requirement. The response speed of the servo motor is fast because the rotors of the motor are all made of rare earth permanent magnets, and because the rotor uses permanent magnets to reduce the rotor coil loss of the asynchronous motor, the servo motor is also an energy-saving motor; but in order to ensure the precise positioning of the servo motor , usually in the design process, energy consumption is not considered, so few people replace the existing servo motor with the traditional asynchronous motor, because the motor used in the traditio...

AI Technical Summary

Problems solved by technology

Therefore, it is required that the maximum output current of the drive or frequency converter that controls the motor is equal to 3 times the rated current, and the internal components of the drive or frequency converter, such as chips, circuit boards, power supplies, etc. must meet the margin of 3 times the rated current, especially the internal The chip also affects the design power of the driver or inverter because the current passing through the chip is too large. The rated power of the design is reduced by 2 / 3, and the price is very expensive, resulting in the phenomenon that the control servo motor driver on the market has low power and high price.

It also determines that the power of the servo motor is relatively small, usually only a few kilowatts at the maximum, which makes people feel that the power of the servo motor itself is a small illusion, while the high power of the motor in traditional industries is very common, which seriously affects the wide use of servo motors in traditional industries.

[0005] (2) The servo motor cannot be matched with a dedicated driver or frequency converter to achieve open-loop control: In order to ensure accurate positioning of the current servo motor, in the design process, the servo motor is designed according to the maximum torque of the motor is 3 times the rated torque The design algorithm is designed, so that the maximum current of the drive or frequency converter that controls the servo motor is required to be three times the rated current. However, many drives on the market, such as frequency converters, are designed according to the maximum current of the drive. 1.5 times the current design algorithm, so when the servo motor open-loop control is realized with a dedicated driver or frequency converter, the servo motor often appears that the motor works at the rated load or slightly higher than the rated load, or even below the rated load, the motor passes through The current has exceeded the rated current of the drive or frequency converter, and the drive or frequency converter is self-protected by the maximum current and will alarm, and the motor will stop

Therefore, the servo motor cannot meet the matching of ordinary frequency converters or special drives to realize open-loop control, and cannot meet the requirements of servo motors when replacing asynchronous motors in traditional industries:

[0006] (3) The mechanical efficiency of the current servo motor is not high: in order to ensure accurate positioning of the current servo motor, in the design process, the design of the servo motor is designed according to the algorithm that the maximum torque of the motor is 3 times the rated torque, so that As a result, the functional margin of the servo motor is too large, causing about 20% of the power of the servo motor to be unavailable, resulting in a waste of power of the servo motor. The rotor of the original servo motor uses a rotor core with a rare earth permanent magnet, compared with an asynchronous motor. , without the structure of the rotor winding, it should be able to save energy by 10%~40%, but the servo motor is designed according to the algorithm design of the maximum torque of the motor is 3 times the rated torque, the mechanical efficiency of the servo motor is generally not high, people in When designing the servo motor, no attention was paid to the energy saving factor of the servo motor;

[0007] (4) The current servo motor can adjust the speed, but compared with the asynchronous motor of the same power, the torque is relatively small: because the servo motor is generally high-speed and adjustable, and the speed is adjustable, the servo motor should be suitable for many asynchronous motors. surroundings

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