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Non-inductive low-speed large-torque starting control method for brushless motor

A low-speed, high-torque, brushless motor technology, used in single motor speed/torque control, AC motor control, electronic commutation motor control, etc. Strong ability, the effect of overcoming limitations

Inactive Publication Date: 2021-09-07
昆山环正电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at high speed, due to the limitation of ADC sampling conversion speed, it will cause lag or loss of zero crossing point
So in summary, the comparator and ADC have certain limitations in detecting zero-crossing points.

Method used

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  • Non-inductive low-speed large-torque starting control method for brushless motor
  • Non-inductive low-speed large-torque starting control method for brushless motor

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Embodiment Construction

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implement...

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Abstract

The invention discloses a non-inductive low-speed large-torque starting control method for a brushless motor. In the method, an MCU, an MOS drive inverter and a motor are included, the MCU is connected with the MOS drive inverter, the MOS drive inverter is respectively connected with a U phase, a V phase and a W phase of the motor, and a resistor R1, a resistor R2 and a resistor R3 are respectively connected to the lines where the MOS drive inverter is connected with the U phase, the V phase and the W phase of the motor; the resistor R1, the resistor R2 and the resistor R3 are respectively connected in series with a resistor R4, a resistor R5 and a resistor R6, a Vbemf_u of the MCU is connected between the resistor R3 and the resistor R6, and a Vbemf_v of the MCU is connected between the resistor R2 and the resistor R5; a Vbemf_w of the MCU is connected between the resistor R1 and the resistor R4, and a Vbemf_n of the MCU is connected with a resistor R7, a resistor R8 and a resistor R9. According to the invention, the low-speed large-torque start is smooth, the low-speed start does not rotate reversely, the loading capacity is higher, and the high-speed running is not blocked.

Description

technical field [0001] The invention relates to the technical field of start-up control of brushless motors, in particular to a non-inductive low-speed high-torque start-up control method for brushless motors. Background technique [0002] Brushless DC motor (BLDCM) has the advantages of simple structure, high operating efficiency and good speed regulation performance, and has been widely used in industrial and commercial fields. In recent years, the position sensorless control of brushless DC motors has been a research hotspot at home and abroad. With the development of electronic technology, the sensorless control scheme has become more and more mature. The more common sensorless rotor position signal detection methods include back electromotive force method, stator inductance method, freewheeling diode method, flux linkage estimation method and state observer method, among which the back electromotive force method is the most effective and practical. [0003] The brushle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/182H02P6/20H02P27/08
CPCH02P6/08H02P6/085H02P6/182H02P6/20H02P27/085
Inventor 黄勇杰
Owner 昆山环正电子有限公司