Bridge arm for motor drive circuit and control method thereof

A drive circuit and bridge arm technology, which is applied to the bridge arm of a motor drive circuit and its control field, can solve the problem of high switching loss rate of the motor drive circuit, suppress the reverse recovery problem, have a simple bridge arm structure, and reduce motor drive. The effect of circuit loss

Active Publication Date: 2019-10-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, in practical applications, the switching loss rate of the motor drive circuit is still high

Method used

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  • Bridge arm for motor drive circuit and control method thereof
  • Bridge arm for motor drive circuit and control method thereof
  • Bridge arm for motor drive circuit and control method thereof

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Embodiment Construction

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Hereinafter, the embodiments of the present invention will be described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention. Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the spec...

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Abstract

The embodiment of the invention discloses a bridge arm used in a motor drive circuit and a control method thereof, which relate to the technical field of electrical equipment and electrical engineering, and can suppress the reverse recovery problem of the MOSFET body diode of the motor bridge arm under the condition of high current, and reduce the power consumption of the motor. Drive circuit loss, improve system efficiency. The invention comprises: bridge arm switch tube, bridge arm optimized switch tube, reverse series switch tube, reverse parallel diode, driver and delay link. Wherein, the reverse series switch tube can be connected in series with the switch tube of the upper bridge arm, or can be connected in series with the switch tube of the lower bridge arm, and can also be optimized to reduce the switching loss of the upper and lower bridge arms simultaneously by using two reverse series switch tubes. The anti-parallel diode is connected in parallel to the bridge arm with the anti-series switch. The invention is suitable for the reverse recovery suppression of the bridge arm of the motor.

Description

Technical field [0001] The present invention relates to the technical field of electrical equipment and electrical engineering, in particular to a bridge arm used in a motor drive circuit and a control method thereof. Background technique [0002] At present, in the small and medium power motor drive equipment with input voltage of 100V to 600V, the motor drive circuit topology scheme based on three-phase bridge inverter is mainly used, such as: figure 1 The single-phase bridge arm of the motor drive circuit shown using synchronous rectification technology utilizes the bidirectional conduction characteristic of the Si channel to realize synchronous rectification. However, in the working process of the bridge arm, in order to avoid the bridge arm from passing through, there must be a certain dead time. During the dead time of the upper and lower tubes, the current flows through the body diode of a certain MOSFET. When the other MOSFET tube of the bridge arm is turned on again, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/537H02M1/08
CPCH02M1/08H02M7/537H02M1/0038H02M1/0058Y02B70/10
Inventor 马策宇秦海鸿张英董耀文付大丰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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