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Commutation torque ripple suppression device with energy feedback function

A technology of pulsation suppression and energy feedback, applied in the direction of torque pulsation control, electronic commutation motor control, circuit device, etc., can solve the problem of high cost, improve utilization rate, suppress inrush current, and suppress commutation torque pulsation Effect

Inactive Publication Date: 2017-10-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the switching converter method is that the commutation torque ripple suppression effect is good, but the cost is relatively high

Method used

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  • Commutation torque ripple suppression device with energy feedback function
  • Commutation torque ripple suppression device with energy feedback function
  • Commutation torque ripple suppression device with energy feedback function

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Embodiment

[0040] The present invention adopts the brushless direct current motor to operate under the two-two conduction mode, taking A-C commutation to B-C as an example. In the non-commutation phase, the first capacitor C1 is charged; in the commutation phase, the power supply U S and the first capacitor C1 to supply power to the motor, so that the bus voltage U dc Equal to 4 times the magnitude of the counter electromotive force, reducing the commutation torque ripple. The energy stored in the flyback transformer T1 during the charging process of the first capacitor C1 is fed back to the power supply for reuse.

[0041] combine Figure 5 As shown, it is the timing diagram of power switches S1 and S2 of the present invention, the charging current I C1 And capacitor C1 voltage waveform. At this point, the motor speed is 1000r / min, and the counter electromotive force E=93V. It can be seen from the figure that in the non-commutation area, the power switch S2=1, S1=0, the power suppl...

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Abstract

The invention provides a commutation torque ripple suppression device with an energy feedback function and a method. The commutation torque ripple suppression device is composed of two power switches (S1 and S2), two capacitors (C1 and C2), three diodes (D1, D2 and D3) and one flyback transformer (T1); the positive pole of a power supply (Us) is connected with the anode of the first diode (D1), the cathode of the third diode (D3) and the drain electrode of the first power switch (S1); the negative pole of the power supply (Us) is connected with the source electrode of the first power switch (S1) and the drain electrode of the second power switch (S2). The commutation torque ripple suppression device provided by the invention is used for charging the capacitor at the non-commutation stage, and stops charging when reaching to the expected voltage value; when the commutation is started, the transformer feeds back the energy stored in the charging process to the power supply, and the energy utilization efficiency is improved. The same modulation strategy is always used in the running of a motor, the design of the controller is simplified, the debugging process of each topologic structure switch converter is unnecessary, and the good engineering application value is provided.

Description

technical field [0001] The invention relates to a commutation torque ripple suppression device with energy feedback function, and also relates to a commutation torque ripple suppression method with energy feedback function, specifically belonging to the field of brushless DC motor control. Background technique [0002] In recent decades, brushless DC motors have been widely used in various industrial fields due to their high power density, high torque, high power factor, simple control, and low maintenance cost. However, the vibration and noise generated by the torque ripple of the motor limit the application of the brushless DC motor in the high-precision field. [0003] The main reasons for torque pulsation are: 1. There are errors in the manufacturing process, which will lead to periodic torque pulsation; 2. The PWM modulation method will cause small-amplitude high-frequency torque pulsation; 3. Commutation torque pulsation, Accounting for about 50% of the total pulsatio...

Claims

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Application Information

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IPC IPC(8): H02P6/10H02P6/182H02J7/34
CPCH02J7/345H02P6/10H02P6/182
Inventor 姚绪梁赵继成张敬南江晓明常英健王峰林浩张永奇鲁光旭胡心达
Owner HARBIN ENG UNIV
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