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Single-coil brushless DC motor driver integrated circuit driven by sine wave current

A brushless DC motor and driving integrated circuit technology, applied in the direction of single-phase motor control, etc., can solve the problems of low efficiency and large current noise, and achieve the effect of reducing noise, increasing power consumption, and ensuring reliability

Active Publication Date: 2018-04-13
CROSSCHIP MICROSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a single-coil brushless DC motor drive integrated circuit driven by a sine wave current to solve the problems of large current noise and low efficiency of the existing single-coil brushless DC motor drive circuit

Method used

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  • Single-coil brushless DC motor driver integrated circuit driven by sine wave current
  • Single-coil brushless DC motor driver integrated circuit driven by sine wave current
  • Single-coil brushless DC motor driver integrated circuit driven by sine wave current

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Embodiment Construction

[0019] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0020] Such as figure 1 The shown sine wave current-driven single-coil brushless DC motor drive integrated circuit includes a Hall voltage generation unit, an adaptive amplification comparison unit and an output unit.

[0021] Wherein, the Hall voltage generating unit includes a regulator tube and a Hall element connected to the output terminal of the regulator tube; the output unit is an H-bridge circuit. The Zener tube i...

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Abstract

The invention discloses a single-coil DC brushless motor driving integrated circuit driven by sine wave current, which includes a Hall voltage generating unit, an adaptive amplification and comparison unit and an output unit. The invention adopts the PWM voltage output waveform to drive the coil, uses the impedance of the coil itself to filter high-frequency components, and the working current flowing through the fan coil is a sinusoidal waveform, which greatly reduces the noise when the coil is switched. While reducing the noise, the power consumption of the chip is not increased, which ensures the reliability of the system.

Description

technical field [0001] The invention relates to a single-coil DC brushless motor drive integrated circuit driven by sine wave current. Background technique [0002] When the single-coil DC brushless motor is running, when the voltage state of the two complementary output signals of the driver chip switches, due to the inductance characteristics of the motor coil, the current cannot change instantaneously, which will cause pulse spikes in the voltage waveform at the output end. During the switching process, there are high-frequency components in the current, and the high-frequency components in the audio frequency range will generate noise audible to human ears. For applications with quiet requirements, it is necessary to add filter capacitors at both ends of the coil, which can be relieved by increasing the switching time. This approach increases the cost of the overall solution and also reduces the efficiency of the motor. [0003] To reduce noise without increasing cost,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/26
Inventor 彭卓陈忠志赵翔
Owner CROSSCHIP MICROSYST
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