Brushless DC motor control system without PFC (Power Factor Correction) circuit

Abstract

The invention relates to the technical field of motor control and in particular relates to a brushless DC motor control system without a PFC (Power Factor Correction) circuit. The brushless DC motor control system without the PFC circuit comprises a drive circuit, an IGBT (Insulated Gate Bipolar Translator) circuit, a CPU (Central Processing Unit) control system and a motor, wherein the drive circuit and the front end of the CPU are connected with a power supply without the PFC circuit; the power supply without the PFC circuit is connected with the IGBT circuit; the drive circuit is connectedwith the IGBT circuit; the IGBT circuit is connected with the motor; and the drive circuit is connected with the CPU control system. According to the brushless DC motor control system without the PFCcircuit, the size of the controller is reduced, the efficiency is increased, the cost is reduced, and the motor can be driven under the condition that the motor controller does not have the PFC circuit or a large electrolytic capacitor, so that the power grid utilization ratio is increased, and the designed rotating speed requirement of the motor can be met.

Description

technical field [0001] The invention relates to a DC brushless motor control system, in particular to a DC brushless motor control system without a PFC circuit. Background technique [0002] With the vigorous development of power electronics technology and microelectronics technology, people are increasingly calling for the miniaturization, thinning and low noise of the motor, and put forward higher requirements for the structure and volume of the motor. Brushless motors are widely used in electric tools, home appliances, medical equipment and robots with many advantages such as small size, light weight, high efficiency, good speed regulation performance, no commutation sparks and no excitation loss. Most of the existing brushless motor controllers use PFC circuit as the power correction of the controller power supply. The disadvantages are that the peak value of the switch tube and inductance is large, the control circuit is complicated, and it is sensitive to noise, which ...

AI Technical Summary

Problems solved by technology

Most of the existing brushless motor controllers use PFC circuit as the power correction of the controller power supply. The disadvantages are that the peak value of the switch tube and inductance is large, the control circuit is complicated, and it is sensitive to noise, which makes the application range of this controller relatively large. Small, such as some portable electric tools and small household appliances cannot be used, so the current technology cannot meet people's needs for high-efficiency, low-noise, low-energy consumption, and small-volume motors

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