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Single resistance motor current sampling method, motor drive circuit and readable storage medium

A technology of motor current sampling and motor drive circuit, applied in the field of motor drive circuit and computer readable storage medium, single resistor motor current sampling, can solve motor noise, large harmonic loss of motor drive circuit, pulse current asymmetry, etc. question

Active Publication Date: 2019-01-11
GUANGDONG GOBAO ELECTRONICS TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] The invention provides a single-resistor motor current sampling method, a motor drive circuit and a computer-readable storage medium, aiming to solve the problem of pulse current of the motor drive circuit occurring when a single resistor is used to sample the phase current of the motor drive circuit in the traditional technology Severe asymmetry, which in turn leads to large harmonic losses in the motor drive circuit, and the problem of extremely high noise when the motor is running at no-load and high speed

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  • Single resistance motor current sampling method, motor drive circuit and readable storage medium
  • Single resistance motor current sampling method, motor drive circuit and readable storage medium
  • Single resistance motor current sampling method, motor drive circuit and readable storage medium

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Embodiment Construction

[0028] It should be noted that in the motor drive circuit, sampling the phase current of the motor drive circuit through a single resistor is an extremely effective and simple method in this field. Since the motor drive circuit has different circuit structures, the single resistor sampling method can be Applicable to different types of motor drive circuits; figure 1 For example, figure 1 A schematic diagram of the circuit structure of the motor drive circuit 10 provided by the embodiment of the present invention is shown. The motor drive circuit 10 includes: a power supply Vcc, a drive circuit 201 and a sampling resistor R, wherein the power supply Vcc outputs a power supply, and the drive circuit 201 is based on PWM (Pulse Width Modulation , pulse width modulation) pulse control operation, wherein, PWM pulse is used as the driving signal of the driving circuit 201; specifically, as figure 1 As shown, the drive circuit 201 includes multi-phase bridge arms, and each phase brid...

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Abstract

The invention belongs to the technical field of motor sampling, and provides a single resistance motor current sampling method, a motor drive circuit and a computer readable storage medium. In the single resistance motor current sampling method, the PWM pulse of the motor drive circuit will be phase-shifted or compensated once only when the time sampling area of the motor drive circuit is continuously in the non-observation area of the motor multiple times. In the process of multiple current sampling, the time sampling area of the motor drive circuit is not continuously in the non-observationarea of the motor multiple times or the time sampling area of the motor drive circuit is in the observation area. At this time, the PWM pulse of the motor drive circuit does not need to be phase-shifted or compensated. Therefore, the single resistance motor current sampling method greatly reduces the number of times of phase-shifting or compensation for the PWM pulse, and solves the problem of large harmonic loss in the motor drive circuit caused by severe asymmetry of the pulse current in the motor drive circuit in traditional technology.

Description

technical field [0001] The invention belongs to the technical field of motor sampling, and in particular relates to a single-resistance motor current sampling method, a motor drive circuit and a computer-readable storage medium. Background technique [0002] During the operation of the motor, the phase current of the motor drive circuit can be used to monitor the running state of the motor in real time to maintain the normal operation of the motor; in the traditional technology, a single resistor is usually used to realize the phase current sampling of the motor drive circuit. The main method is: when the phase current of the motor drive circuit is in the non-observation area of ​​the modulation area or the non-observation area near the base vector, by changing the pulse current connected to the motor drive circuit, the pulse current is shifted and equalized. way, adjust the running state of the motor, and then detect the phase current of the motor drive circuit. [0003] H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R19/14G01R31/34
CPCG01R19/00G01R19/14G01R31/34
Inventor 张栋栋张新业陈清付
Owner GUANGDONG GOBAO ELECTRONICS TECH CO LTD
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