Driving signal processing device and motor system

A technology for driving signals and signals, applied in the direction of output power conversion devices, electrical components, pulse duration/width modulation, etc., can solve problems such as inability to detect dead time, and achieve the effect of extending dead time.

Pending Publication Date: 2022-01-11
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] In order to solve the above-mentioned technical problem of being unable to detect whether the dead time is too small, the application provides a driving signal processing device and a motor system

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  • Driving signal processing device and motor system
  • Driving signal processing device and motor system
  • Driving signal processing device and motor system

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Embodiment Construction

[0056] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0057] The driving signal is the key signal for power devices (for example, motors). In order to protect the power devices and avoid the direct connection of the upper and lower bridge arms due to the turn-off delay effect, a dead time will be set, which is the time when the upper and lower bridge arms are turned off at the same time to ...

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Abstract

The invention relates to a driving signal processing device and a motor system. The driving signal processing device comprises a dead zone detection circuit, a signal rising edge detection circuit, a signal delay circuit and a control unit. According to the invention, the dead zone detection circuit can detect the dead zone indication signal indicating whether the target dead zone duration is abnormal, the rising edge detection signal can be obtained based on the signal rising edge detection circuit, and then the control signal for performing delay control on the signal delay circuit is generated based on the dead zone indication signal and the rising edge detection signal. Therefore, when the signal time-delay circuit is triggered by the control signal, the upper and lower bridge arm driving signals can be subjected to time-delay processing to obtain the delayed driving signal, and the purpose of prolonging the time length of the dead zone by performing time-delay processing on the rising edge of the upper and lower bridge arm driving signals under the condition that the time length of the target dead zone is too short can be achieved.

Description

technical field [0001] The present application relates to the technical field of motor control, in particular to a driving signal processing device and a motor system. Background technique [0002] In the servo motor control system, the PWM signal is the key signal for the motor drive. When driving the gate of the power device, in order to make the power device work reliably and avoid the direct connection of the upper and lower bridge arms due to the turn-off delay effect, it is necessary to set the dead time, that is, the time when the upper and lower bridge arms are turned off at the same time. [0003] The dead time can effectively avoid the delay effect caused by one bridge arm not being completely turned off, while the other bridge arm is in the conduction state, so as to avoid blowing up the power device through the direct connection. The larger the dead time, the more reliable the work of the power device, but it will cause distortion of the output waveform and redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/38H03K7/08
CPCH02M1/38H03K7/08
Inventor 王长恺张晓瑞经琦黄伟庭丁雪健苏圣达
Owner GREE ELECTRIC APPLIANCES INC
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