CAJ | 학술논문

由于受到传统开关器件的限制，大电流开关电源存在功率小、效率低等问题，因此在对PWM软开关技术进行分析后，利用AT89 C52单片机的中断方式输出频率和占空比可调的PWM脉冲，控制大功率开关管GT40 T101的通断，从而实现以模拟继电器的方式控制电路的通断。通过搭建电路验证了PWM软开关在控制大功率电源方面的优越性，对于实际的电气工程应用具有一定的参考价值。
유우수도전통개관기건적한제，대전류개관전원존재공솔소、효솔저등문제，인차재대PWM연개관기술진행분석후，이용AT89 C52단편궤적중단방식수출빈솔화점공비가조적PWM맥충，공제대공솔개관관GT40 T101적통단，종이실현이모의계전기적방식공제전로적통단。통과탑건전로험증료PWM연개관재공제대공솔전원방면적우월성，대우실제적전기공정응용구유일정적삼고개치。
The brushless DC motor (BLDCM) is an advanced mechanical electronic device.Rotor position detection method is an important part of the BLDCM.Traditional method with position sensor is not suitable the need for the current applications because of its own shortcomings, so the position detection method has been the research hotspot recently.The basic principle and research situation of sensorless detection methods are introduced , and their advantages and disadvantages are compared .It provides a certain theoretical basis for researching on sensorless and has certain value.