A new control method for five-phase stepping motor with pentagonal connection
A technology of stepper motor and control method, which is applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc. It can solve the problems of low voltage utilization rate, motor harmonics, large vibration, etc., and achieve the reduction of harmonics weight, improve voltage utilization, and reduce vibration
Active Publication Date: 2020-11-10
深圳锐特机电技术有限公司
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Problems solved by technology
The star connection method is easy to control, but the utilization rate of the voltage is low, and the high-speed performance is poor; The algorithm is complex, the vibration is small, and the high-speed performance is good
[0005] Existing five-phase hybrid stepping motor drivers are built with foreign dedicated chips, which usually can only perform full-step and half-step operation, and cannot adjust the response to different use environments of the motor, and cannot exert the maximum performance of the five-phase stepping motor
[0006] The core of the five-phase stepping motor control lies in the SVPWM algorithm of the five-phase voltage source inverter (VSI). If only the algorithm of the three-phase bridge is extended to the five-phase bridge, the nearest two voltage vectors are used to synthesize Voltage vector, the motor will have extremely large harmonics, resulting in greater vibration
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] refer to Figure 4 , the present invention provides a new pentagon connection five-phase stepping motor control method, which is characterized in that the two-phase voltage obtained after the given current is controlled by PI is calculated by the nearest four-vector algorithm to obtain four voltages The magnitude of the vector, thereby obtaining the corresponding PWM duty cycle of the five half-bridges, and finally output current to the motor winding through the five-phase half-bridge driver, and the winding of the five-phase stepping motor adopts a new pentagonal connection.
[0022] The method also includes current feedback. The current feedback extends the clark transformation method to five phases by collecting the currents of five windings in the five-phase stepping motor, and then converts the five-phase currents into two-phase fee...
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The invention discloses a control method of a five-phase stepping motor based on new pentagonal connection, which comprises the following steps: performing calculation on a two-phase voltage obtainedafter PI control on a given current by using a nearest four-vector algorithm to obtain the magnitudes of four voltage vectors; obtaining the PWM duty cycles of five half-bridges; and outputting a current to the motor windings through a five-phase half-bridge driver, wherein the windings of the five-phase stepping motor adopt new pentagonal connection. The SVPWM waveforms of five half-bridges are generated by using a nearest four-vector SVPWM algorithm in the invention. Subdivision control on a five-phase stepping motor can be realized. The DC bus voltage utilization ratio of five-phase voltagesource inverters is improved. The harmonic component contained in the output phase voltage is reduced. Vibration can be reduced.
Description
technical field [0001] The invention relates to motor drive control technology, in particular to a control method for a five-phase stepping motor with a new pentagonal connection. Background technique [0002] In the equipment manufacturing industry, high precision and low vibration have become an important indicator of equipment. The development direction of motor drive control technology directly determines the technical development direction of the equipment manufacturing industry. The level of motor drive control technology also directly determines the equipment manufacturing industry and its The technical level of downstream industries. [0003] At present, domestic five-phase stepper motor drivers are mainly built using dedicated chips, which are relatively backward in performance and poor in flexibility. The high-performance five-phase stepper driver market is mainly occupied by Japan's Oriental Motor Company. Due to its absolute advantage in performance, the price i...
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IPC IPC(8): H02P8/12H02P8/22H02P21/22H02P27/08
Inventor 赖九才
Owner 深圳锐特机电技术有限公司