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Phase-loss detection method of direct-current motor system and direct-current motor system

A DC motor and phase loss detection technology, which is applied in the direction of motor generator testing, control system, control generator, etc., to ensure normal operation, ensure system performance, and save system cost

Active Publication Date: 2014-10-22
WUHAN REFRIGERATION EQUIP OF MIDEA GROUP
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  • Application Information

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Problems solved by technology

Moreover, since the main control module in the related art has at most 3 control interfaces of the IPM module, if more DC motors need to be controlled, the main control module needs to be added

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  • Phase-loss detection method of direct-current motor system and direct-current motor system
  • Phase-loss detection method of direct-current motor system and direct-current motor system
  • Phase-loss detection method of direct-current motor system and direct-current motor system

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0046] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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Abstract

The invention discloses a phase-loss detection method of a direct-current motor system. The direct-current motor system comprises N direct-current motors in parallel connection, an IPM module respectively connected to the N direct-current motors, and a master control module, wherein the master control module outputs six paths of PWM signals to the IPM module to control the N direct-current motors; and the N is larger than or equal to 2. The detection method comprises the following steps that: a first direct current Id1 is applied to straight shafts of the N direct-current motors; a maximum straight shaft voltage Vdmax and a minimum straight shaft voltage Vdmin of the N direct-current motors are obtained; when the ratio of the maximum straight shaft voltage Vdmax to the minimum straight shaft voltage Vdmin is larger than a preset threshold, the occurrence of the motor phase-loss situation at the N direct-current motors in the direct-current motor system is determined. According to the invention, the occurrence of the motor phase-loss situation at the N direct-current motors can be detected, thereby ensuring the normal operation of the direct-current motor system, guaranteeing the system performance, realizing reliable control of the system and avoiding potential safety hazard. In addition, the invention also discloses a direct-current motor system.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a phase loss detection method of a DC motor system and a DC motor system. Background technique [0002] Compared with AC motors, DC motors are more energy-saving and efficient. With the national advocacy of energy conservation and emission reduction, more and more air-conditioning manufacturers use DC motors to develop and design air conditioners. Most of the existing DC motor systems use a main control module to control an IPM module (Intelligent Power Module, intelligent power module), and then drive a DC motor through the IPM module. However, the disadvantage of the prior art is that the cost of the DC motor is slightly higher than that of the AC motor. Correspondingly, the DC motor system is much more complicated and expensive than the AC motor system. In particular, most of the IPM modules rely on imports, and few domestic manufacturers produce them, resulting in high cost o...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01R31/02H02P21/00H02P5/46
Inventor 霍军亚
Owner WUHAN REFRIGERATION EQUIP OF MIDEA GROUP
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