Parameters Optimization In Magneticfield And Research On Water-cooling Of Permanent Magnet Torque Motor

With the improvement of industrial production technology, the required pricision for transmission mechanis m, like simulation platform and numerical control machine is higher than ever. Therefore, the permanent magnet torque motor gets more and more applications because of its significant characteristics of low-speed and direct-drive. The main output of the permanent magnet torque motor is the torque, which has a good linearity and rapid response capability. Especially the permanent magnet torque motor can still normally function and output large torque in certain harsh situations, even when the rotor is blocked. But under the working condition of outputing large torque, the linearity of torque characteristic and torque ripple is vulnerable to the influence of the magnetic circuit saturation. In this paper, the working principle and torque characteristics of the permanent magnet torque motor were studied, and a simple method to verify the saturation degree of magnetic circuit is derived from the mathematical model. Through the analys is of the permanent magnet torque motor design features, some rese arch on the corresponding parameter optimization design was applied to weaken the magnetic saturation problem under large output torque condition. At the same time, some general analys is was made about the motor losses and temperature fie ld, and a kind of structure design was successfully achieced to satisify universal water-cooling groove.At last the correctness of the simulation analysis was verified according to the corresponding experiments.Based on the mathematical model of permanent magnet torque mo tor, this paper briefly analyses its working principle and ouput features and gets the method to study the permanent magnet torque motor output torque characteristic, and it is concluded that the motor’s magnetic circuit will be saturated inevitably under the working condition of outputing large torque. According to the design of the corresponding indicators, this paper completed the electromagnetic designs for a series of permanent magnet torque motor, made model simulations in the environment of the AN SYS MAXWELL software, and verified the the rationality and feasibility of design based on the simulation results. Combined with the torque characteristics from simulation results, this paper selected a variety of parameters optimization design method to weake n the motor magnetic circuit saturation, improved the motor output characteristics, reduced the motor torque fluctuation, and finally accomplished a specific optimization design scheme.Permanent magnet torque motor generally has higher electromagnetic load when outputing large torque. Due to the application of the permanent magnet torque motor, its small size often causes heat dissipation, which easily leads to prominent local temperature rise. This paper briefly analyzes the power loss, heat generating, and temperature fie ld of the permanent magnet torque motor. Referring all kinds of water-cooling motor design at home and abroad, this paper studies the influence factor to temperature rise, such as cooling water flow rate, flow velocity, groove structure, and then completes the design and improvement of the water-cooling groove for the permanent magnet torque motor.At last considering the existing condition of the laboratory, a simplified prototype motor and motor test platform was designed and built in t he laboratory, and with the use of torque measuring instrument and other equipment, the actual torque characteristics and temperature situation were tested to verify the correctness of the calculation and simulation results.